US Pat. No. 9,080,287

INDUSTRIAL ROLL WITH MULTIPLE SENSOR ARRAYS

Stowe Woodward Licensco, ...

1. An industrial roll, comprising:
a substantially cylindrical core having an outer surface;
a polymeric cover circumferentially overlying the core outer surface; and
a sensing system comprising:
a first signal carrying member serially connecting a first set of sensors at least partially embedded in the polymeric cover
and arranged in a first helical configuration defined by a first helix angle around the roll, wherein the sensors are configured
to sense an operating parameter experienced by the roll and provide signals related to the operating parameter, and wherein
the first helix angle is defined by an angle between a circumferential position of a first endmost sensor in the first set
of sensors and a circumferential position of a second endmost sensor in the first set of sensors relative to the axis of rotation
of the roll;

a second signal carrying member spaced apart from the first signal carrying member, the second signal carrying member serially
connecting a second set of sensors at least partially embedded in the polymeric cover and arranged in a second helical configuration
defined by a second helix angle around the roll, wherein the sensors are configured to sense an operating parameter experienced
by the roll and provide signals related to the operating parameter, and wherein the second helix angle is defined by an angle
between a circumferential position of a first endmost sensor in the second set of sensors and a circumferential position of
a second endmost sensor in the second set of sensors relative to the axis of rotation of the roll; and

a signal processing unit operatively associated with the first and second signal carrying members, wherein the signal processing
unit is configured to selectively monitor the signals provided by the first and second set of sensors;

wherein the first signal carrying member bypasses the sensors of the second sensor set, and wherein the second signal carrying
member bypasses the sensors of the first sensor set;

the industrial roll in combination with a first mating structure positioned relative to the industrial roll to form a first
nip therewith and a second mating structure positioned relative to the industrial roll to form a second nip therewith, wherein
the sensing system is configured such that no more than one sensor of the first sensor set is positioned in the first nip
and the second nip simultaneously and no more than one sensor of the second sensor set is positioned in the first nip and
the second nip simultaneously.

US Pat. No. 9,488,217

SOFT RUBBER ROLL COVER WITH WIDE GROOVES

Stowe Woodward Licensco, ...

1. An industrial roll, comprising:
a substantially cylindrical metallic core;
a base layer that is adhered to and circumferentially overlies the core; and
top stock layer that circumferentially overlies the base layer;
wherein the top stock layer comprises a material having a Pusey and Jones (P&J) hardness of 35 or higher;
wherein the to stock layer further comprises blind drilled holes;
wherein the top stock layer includes circumferential grooves, and wherein the grooves have a width/height ratio of at least
0.7.

US Pat. No. 9,356,486

POSITION SENSING TECHNIQUES

Woodward HRT, Inc., Sant...

1. A position sensing apparatus, comprising:
a housing which defines a longitudinal axis;
a positioning element which, relative to the housing, translates linearly along the longitudinal axis;
a rotational member which, relative to the housing, rotates about the longitudinal axis as the positioning element translates
linearly along the longitudinal axis, the rotational member defining a helix to receive torque from the positioning element
as the positioning element translates linearly along the longitudinal axis;

a first sensor assembly having (i) a set of magnets coupled to the rotational member and (ii) a first set of sensors coupled
to the housing, the first set of sensors being constructed and arranged to detect angular displacement of the set of magnets
about the longitudinal axis; and

a second sensor assembly having (i) a linear displacement member, which relative to the housing, translates linearly along
the longitudinal axis in response to movement of the positioning element and (ii) a second set of sensors coupled to the housing,
the second set of sensors being constructed and arranged to detect linear displacement of the linear displacement member along
the longitudinal axis.

US Pat. No. 10,344,594

ACTUATOR BEARING ARRANGEMENT

Woodward, Inc., Fort Col...

1. An actuator, comprising:a housing including a rotor cap, a peripheral wall, and a floor that define at least one fluid chamber and having at least one housing surface;
wherein the at least one housing surface includes a rotor cap surface and a floor surface;
an actuation member including at least one vane configured to move within the at least one fluid chamber;
wherein the actuation member having at least one actuation member surface;wherein the actuation member surface includes a first axial vane surface and a second axial vane surface;a seal disposed on the at least one actuation member surface and contacting the at least one housing surface;
at least two bearings, wherein both of the at least two bearings are inserted into one of the first axial vane surface and the second axial vane surface and the at least two bearings contact one of the rotor cap surface and the floor surface;
wherein the at least two bearing do not contact the seal during actuation of the actuator; and
wherein the housing is stationary and the actuation member is configured to move relative to the housing.

US Pat. No. 9,121,686

NIP WIDTH SENSING METHOD AND SYSTEM FOR INDUSTRIAL ROLLS

Stowe Woodward Licensco, ...

1. A method of determining the width of a nip formed by an industrial roll and a mating structure, comprising the steps of:
providing an industrial roll having a cylindrical core and a polymeric cover surrounding the core, the industrial roll further
comprising a plurality of pressure sensors mounted in the roll;

positioning the industrial roll in contact with the mating structure to form a nip;
rotating the industrial roll;
receiving pressure signals from the plurality of pressure sensors at a controller; and
in the controller, utilizing the pressure signals from the pressure sensors to determine the width of the nip at locations
on the roll associated with the pressure sensors.

US Pat. No. 9,097,595

SYSTEM AND METHOD FOR DETECTING AND MEASURING VIBRATION IN AN INDUSTRIAL ROLL

Stowe Woodward, L.L.C., ...

1. A method of assessing vibration in an industrial roll, comprising the steps of:
providing a roll that includes a plurality of annular nip condition sensor units mounted thereon, each of the annular nip
condition sensor units being positioned at different axial locations along the roll and configured to provide nip condition
signals from a nip formed by the roll and a mating structure;

rotating the roll;
measuring a nip condition at multiple circumferential locations on each nip condition sensor unit; and
determining the source of vibration in the roll based on the nip condition measurements.

US Pat. No. 9,273,609

PARALLEL METERING PRESSURE REGULATION SYSTEM FOR A THERMAL EFFICIENT METERING SYSTEM

Woodward, Inc., Fort Col...

1. A fuel pressure regulation system, comprising:
a supply arrangement for supplying an outlet flow at a first pressure;
a primary metering circuit, an inlet of which receives a first portion of the outlet flow of the supply arrangement, the primary
metering circuit comprising a fuel metering valve and a primary pressure regulator, the primary pressure regulator connected
to an outlet of the fuel metering valve;

at least one secondary metering circuit, the primary pressure regulator operably connected to the at least one secondary metering
circuit to sense a pressure of the at least one secondary metering circuit;

a bypass regulator connected in parallel with the primary metering circuit and the least one secondary metering circuit such
that an inlet of the bypass regulator receives a second portion of the outlet flow of the supply arrangement; and

wherein the bypass regulator is operably connected on an outlet side of the fuel metering valve to sense a pressure in the
primary metering circuit downstream from the fuel metering valve.

US Pat. No. 9,476,347

CONTROLLED SPARK IGNITED FLAME KERNEL FLOW IN FUEL-FED PRECHAMBERS

Woodward, Inc., Fort Col...

1. A pre-chamber spark plug comprising:
a pre-chamber housing defining an enclosed pre-chamber;
an insulator disposed at a back of the pre-chamber;
a center electrode in the pre-chamber housing, the center electrode comprising a portion surrounded by the insulator and a
portion extending forward from the insulator into the pre-chamber;

a ground electrode in the pre-chamber housing and surrounding the center electrode, the ground electrode comprising: an electrode
portion spaced in surrounding relation to the center electrode to define a spark gap between the ground electrode and the
center electrode; and

a radial offset circumferential extension extending axially forward past the end of the center electrode forming an aerodynamic
nose cone.

US Pat. No. 9,243,597

FUEL INJECTION PUMP

Yanmar Co., Ltd., Osaka ...

1. A fuel injection pump having an electromagnetic spill valve, wherein the electromagnetic spill valve comprises:
a housing in which an insert piece insertion hole is formed;
an insert piece formed to be substantially a cylinder whose inner peripheral surface has a valve seat and detachably installed
in the insert piece insertion hole coaxially;

a spill valve body formed to be substantially a cylinder whose outer peripheral surface has a seal surface facing the valve
seat and slidably inserted into the insert piece so that the seal surface can sit on the valve seat when the spill valve body
is slid toward a first side of the electromagnetic spill valve in an axial direction of the insert piece;

a stopper which is attached detachably to the insert piece insertion hole and configured to touch the spill valve body when
the spill valve body is slid toward a second side of the electromagnetic spill valve in the axial direction of the insert
piece;

a solenoid configured to slide the spill valve body toward the first side; and
a biasing member biasing the spill valve body toward the second side,
wherein the stopper touches the insert piece and fixes the insert piece within the insert piece insertion hole, and
wherein an end of the spill valve body is separated from the stopper when the seal surface abuts the valve seat.

US Pat. No. 9,303,644

GEAR PUMP BEARING DAM

Woodward, Inc., Fort Col...

11. A method for pumping a fluid comprising:
providing a gear pump comprising:
a first gear having a first axis, a first gear root diameter, and a plurality of first gear teeth having a gear addendum and
a gear set pressure angle;

a second gear having a second axis, a second gear root diameter, and a plurality of second gear teeth having the gear addendum
and the gear set pressure angle;

a housing comprising:
a fluid inlet and a fluid discharge;
a first gear bearing and a second gear bearing configured to position the first gear and the second gear along a bearing center
line extending between the first axis and the second axis on opposite sides of a bearing split line, the bearing split line
extending through a midpoint between the first gear root diameter and the second gear root diameter and extending perpendicular
to the bearing center line, the first gear bearing and the second gear bearing configured to position the first gear teeth
and second gear teeth in intermeshing contact; and,

a central fluid dam comprising:
a first face arranged at an angle to the bearing split line, spaced apart from the bearing center line at the bearing split
line a first distance towards the fluid inlet, formed as a straight edge intersecting the bearing split line and extending
from the first gear root diameter away from the bearing center line to the second gear root diameter;

a second face arranged approximately perpendicular to the bearing split line, spaced apart from the bearing center line at
the bearing split line a second distance towards the fluid outlet, and extending between the first gear root diameter and
the second gear root diameter; and

a vent formed in the second face proximate the second gear, the vent having a semi-circular cross-section extending into the
second face, the vent having a radius approximately tangent to the second gear root diameter, and the vent being spaced apart
from the bearing center line toward the fluid discharge a third distance in a range of about 50% to about 75% of a gear addendum;

providing the fluid at the fluid inlet to a collection of tooth spaces;
driving the first gear;
driving the second gear with the first gear; and
urging the movement of the fluid in the collection of tooth spaces from the fluid inlet to the fluid discharge, wherein backflow
of the fluid from the fluid discharge to the fluid inlet is impeded by the central fluid dam.

US Pat. No. 9,593,696

ROTARY PISTON TYPE ACTUATOR WITH HYDRAULIC SUPPLY

Woodward, Inc., Fort Col...

1. A rotary actuator system comprising:
a first housing defining a first arcuate chamber comprising a first cavity, a first fluid port in fluid communication with
the first cavity, and an open end, wherein the first housing defining the first arcuate chamber is formed from a single piece
of material;

a rotor assembly rotatably journaled in said first housing and comprising a rotary output shaft and a first rotor arm extending
radially outward from the rotary output shaft;

an arcuate-shaped first piston disposed in said first housing for reciprocal movement in the first arcuate chamber through
the open end, wherein a first seal, the first cavity, and the first piston define a first pressure chamber, and a first portion
of the first piston contacts the first rotor arm;

a first fluid line coupled to the first fluid port;
a high pressure fluid line;
a low pressure fluid line;
a central pressure source coupled to the high pressure fluid line; and
a servo valve positioned between the central pressure source and the hydraulic actuator and being controllable to selectively
connect the first fluid line to the high pressure fluid line and the low pressure fluid line to control movement of the hydraulic
actuator.

US Pat. No. 9,157,184

INDUSTRIAL ROLL WITH TRIGGERING SYSTEM FOR SENSORS FOR OPERATIONAL PARAMETERS

Stowe Woodward Licensco L...

1. A method of determining a rotative position of an industrial roll, comprising the steps of:
(a) providing a rotating industrial roll having a longitudinal axis, the industrial roll having mounted on one end thereof
an accelerometer;

(b) detecting a gravity vector generated in the accelerometer;
(c) comparing a magnitude and direction of the gravity vector detected in step (b) to a predetermined pre-trigger gravity
vector;

(d) if an absolute value of the gravity vector detected in (b) has not reached an absolute value of the pre-trigger gravity
vector, repeating steps (b) and (c); otherwise, proceeding to step (e);

(e) detecting the gravity vector generated in the accelerometer;
(f) comparing the magnitude and direction of the gravity vector detected in (e) to a predetermined trigger gravity vector,
the absolute value of the magnitude of the trigger gravity vector differing from the absolute value of the magnitude of the
pre-trigger gravity vector by an amount greater than a typical noise signal generated by the accelerometer;

(g) if the absolute value of the magnitude of the gravity vector detected in step (f) reaches the absolute value of the magnitude
of the trigger gravity vector, repeating steps (e) and (f); otherwise, proceeding to step (h); and

(h) determining the rotative position of the roll based on the gravity vector detected in step (e).

US Pat. No. 9,482,433

MULTI-SWIRLER FUEL/AIR MIXER WITH CENTRALIZED FUEL INJECTION

Woodward, Inc., Fort Col...

1. A gas turbine combustor assembly, comprising:
a fuel/air mixer assembly comprising a plurality of fuel/air mixer elements, each fuel/air mixer element defining an air flow
passage therethrough, the plurality of fuel/air mixer elements comprising a center fuel/air mixer element and multiple peripheral
fuel/air mixer elements arranged around the center fuel/air mixer element; and

a fuel injector coupled to the fuel/air mixer assembly comprising a tip portion with a plurality of fuel outlets arranged
to direct fuel into the air flow passages of the fuel/air mixer elements, the plurality of fuel outlets comprising a center
fuel outlet and multiple peripheral fuel outlets, the center fuel outlet arranged to direct fuel into the center fuel/air
mixer element and the peripheral fuel outlets arranged to direct fuel into the peripheral fuel/air mixer elements, each of
the peripheral fuel/air mixer elements comprising a Venturi housing with an opening in a sidewall of the Venturi housing,
and where each of the peripheral fuel outlets of the fuel injector is arranged to direct fuel through the opening in the sidewall
of a respective peripheral fuel/air mixer element.

US Pat. No. 9,435,311

REGULATOR FLOW DAMPING

Woodward, Inc., Fort Col...

1. A fuel flow regulator system for regulating flow, comprising:
a fuel delivery path operable to provide a regulated fuel fluid flow between a fuel inlet and a fuel outlet;
a fuel bypass valve in the fuel delivery path operable to selectively provide a restriction in the fuel delivery path in response
to the pressures of the fuel inlet and the fuel outlet of the regulated fuel fluid flow, wherein the bypass valve is fluidically
connected to a fluid inlet path fluidically connected with the fuel inlet and a fluid outlet path fluidically connected with
the fuel outlet;

a bypass fluid path fluidically connecting the fluid inlet path and the fluid outlet path and parallel with the fuel bypass
valve;

a first restricting orifice in the bypass fluid path; and
a second restricting orifice in one of the fluid inlet path or the fluid outlet path.

US Pat. No. 9,352,824

LINE REPLACEABLE, FLY-BY-WIRE CONTROL COLUMN AND CONTROL WHEEL ASSEMBLIES WITH A CENTRALLY CONNECTED LINE REPLACEABLE DISCONNECT AND AUTOPILOT ASSEMBLY

Woodward MPC, Inc., Skok...

1. A line replaceable yoke for controlling the attitude of an aircraft, the yoke comprising:
a chassis;
a pitch hub rotatably mounted to the chassis for motion about a pitch axis;
a roll hub rotatably mounted to the chassis for motion about a roll axis being generally parallel to the pitch axis;
a support column attached to the pitch hub for rotational motion about the pitch axis with the pitch hub relative to the chassis;
a control wheel pivotally attached to the support column proximate a first end of the support column for rotational motion
about a control wheel pivot axis being generally perpendicular to the pitch axis and roll axis; and

a connection arrangement coupling the control wheel to the roll hub configured to rotate the roll hub about the roll axis
when the control wheel is rotated about the control wheel pivot axis.

US Pat. No. 9,507,365

ADAPTIVE PID CONTROL SYSTEM FOR INDUSTRIAL TURBINES

Woodward, Inc., Fort Col...

24. A turbine system comprising:
a process controller configured to perform a control algorithm based on at least one first control parameter representing
a first value selected from a group comprising a proportional gain (P) value, an integral gain (I) value, and a derivative
gain (D) value, the control algorithm is given by the equation: H(s)=P(1+I/s) (Ds+1), wherein s is the Laplace operator;

a parameter controller configured to perform a parameter adjustment algorithm;
a turbine having assembled thereto a turbine output sensor in communication with the process controller and the parameter
controller;

wherein the parameter adjustment algorithm is configured to perform operations comprising:
providing, to the process controller, at least one first control parameter and a first input value;
controlling, by the process controller, the turbine based on the at least one first control parameter and the first input
value;

receiving, by the parameter controller, a turbine response value provided by the turbine output sensor;
determining, by the parameter controller, at least one second control parameter based on the turbine response value and the
parameter adjustment algorithm, the second control parameter representing a second value selected from the group;

providing, to the process controller from the parameter controller, the at least one second control parameter; and
controlling, by the process controller, the turbine based on the at the least one second control parameter and a second input
value.

US Pat. No. 9,404,513

SERVO VALVE

Woodward, Inc., Fort Col...

1. A servo valve comprising:
a valve housing;
a piston cylinder disposed in the housing;
a piston disposed within the piston cylinder, the piston cylinder being fluidly connected on a first end to a first fluid
pressure pathway and fluidly connected on a second end to a second fluid pressure pathway, the piston configured to translate
axially within the piston cylinder in response to a pressure differential between a first fluid in the first fluid pressure
pathway and a second fluid in the second fluid pressure pathway;

a flapper assembly including an activation portion and closure portion, said closure portion of the flapper assembly extending
from the activation portion, said flapper assembly configured to move said closure portion to engage a first nozzle on the
first fluid pressure pathway when the closure portion is in a first position and configured to move said closure portion to
engage a second nozzle on the second fluid pressure pathway when the closure portion is in a second position; and

a fluid flow control element disposed in the piston cylinder in a portion of the first fluid pressure pathway and comprising
a surface that is sealable with a surface of the piston, the piston configured to seal the first fluid pressure pathway and
stop a flow of fluid through the first fluid pressure pathway when the piston engages the fluid flow control element.

US Pat. No. 9,400,104

FLOW MODIFIER FOR COMBUSTOR FUEL NOZZLE TIP

United Technologies Corpo...

1. A fuel injector nozzle assembly comprising:
a body extending along an axis;
a support having a support body abutting the body and configured to carry fuel to the body;
a core swirl plug positioned at least partially within the body, the core swirl plug having a central passage for a first
fuel flow, a fuel flow path along an outer surface of the core swirl plug for a second fuel flow, and a flow modifying structure
configured to swirl the second fuel flow at a location upstream from a distal end of the nozzle assembly, wherein a portion
of the flow modifying structure is positioned proximate to the support body, and wherein the flow modifying structure extends
along a majority of the body in an axial direction; and

a heat shield sleeve positioned concentrically between the body and the core swirl plug, wherein the heat shield sleeve does
not contact the support, and the core swirl plug does not contact the body or the support,

wherein the flow modifying structure is a rib.

US Pat. No. 9,169,783

ELECTROHYDRAULIC PROPELLER GOVERNOR

Woodward, Inc., Fort Col...

13. A method of controlling blade pitch of a variable pitch propeller, the method comprising:
signaling an electrohydraulic servo valve, in fluid communication with a pressure source and a pressure drain having lower
pressure than the pressure source, to adjust hydraulic pressure in a propeller pitch piston in a first pressure path of a
propeller governor to adjust blade pitch of the propeller within a first range of blade pitch when the propeller is operated
in a flight mode, wherein the electrohydraulic servo valve communicates the pressure source to the propeller pitch piston
to decrease blade pitch within the first range of blade pitch and communicates the pressure drain to the propeller pitch piston
to increase blade pitch within the first range of blade pitch; and

signaling the electrohydraulic servo valve and a second valve in fluid communication with the first pressure path, in fluid
communication with the pressure drain, and coupled to the propeller pitch piston, to adjust hydraulic pressure in a second
pressure path of the propeller governor to adjust blade pitch of the propeller within a second range of blade pitch when the
propeller is operated in a beta mode, wherein the second valve is configured to allow passage of pressure through the first
pressure path when blade pitch is within the first range of blade pitch and vent pressure from the first pressure path when
blade pitch is in the second range of blade pitch,

wherein the first range of blade pitch is a flight range of blade pitch and the second range of blade pitch is a beta range
of blade pitch.

US Pat. No. 9,163,648

ROTARY PISTON TYPE ACTUATOR WITH A CENTRAL ACTUATION ASSEMBLY

Woodward, Inc., Fort Col...

1. A rotary actuator comprising:
a first housing defining a first arcuate chamber including a first cavity, a first fluid port in fluid communication with
the first cavity, and an open end;

a rotor assembly rotatably journaled in said first housing and including a rotary output shaft and a first rotor arm extending
radially outward from the rotary output shaft;

an arcuate-shaped first piston disposed in said first housing for reciprocal movement in the first arcuate chamber through
the open end, wherein a first seal, the first cavity, and the first piston define a first pressure chamber, and a first portion
of the first piston contacts the first rotor arm;

a centrally located actuation assembly including a centrally located mounting point formed in an external surface of the rotary
output shaft, said centrally located mounting point being located proximal to the longitudinal midpoint of the rotary output
shaft, wherein the centrally located actuation assembly further includes a radial recess formed in an external peripheral
surface of the first housing proximal to the centrally located mounting point of the rotor shaft, and wherein said actuation
arm extends through the radial recess;

an actuation arm removably attached at a proximal end to the centrally located mounting point, said actuation arm adapted
at a distal end for attachment to an external mounting feature of a member to be actuated; and

a centrally located mounting assembly comprising a radially projecting portion of the first housing, said centrally located
mounting assembly axially disposed about 180 degrees from the radial recess of the centrally located actuation assembly, said
centrally located mounting assembly adapted for attachment to an external mounting feature.

US Pat. No. 9,388,778

SERVO FLOW RECIRCULATION FOR AN ADVANCED THERMAL EFFICIENT AIRCRAFT ENGINE FUEL SYSTEM

Woodward, Inc., Fort Col...

1. A fuel circulation system, comprising:
a supply pump for providing an outlet flow of fuel:
at least a first and a second electro-hydraulic servo valve (EHSV), the first EHSV connected to an outlet of the supply pump,
and

a flow regulation device interposed between the first and second EHSVs, wherein at least a portion of the outlet flow of fuel
is directed through the first and second EHSVs and the flow regulation device and is returned to an inlet side of the supply
pump;

wherein the first. EHSV, flow regulation device, and second EHSV are connected in series;
wherein the flow regulation device is a pressure regulator that regulates an output flow from the first EHSV at a first pressure
and provides an output flow to the second EHSV at a second pressure; and

wherein the flow regulation device is operable to bypass a portion of the outlet flow from the first EHSV back to the inlet
side of the supply pump.

US Pat. No. 9,325,262

BRUSHLESS MOTORS WITH LINEAR HALL SENSORS

Woodward, Inc., Fort Col...

1. A motor system comprising:
a motor comprising two linear Hall sensors configured to output analog signals; and
a controller configured to control the motor, the controller being operable to:
monitor the analog signals output from the two linear Hall sensors;
determine, based on the analog signals, a plurality of auxiliary signals having a total number of predetermined zero-crossing
points in a 360-electrical-degree span, the total number of predetermined zero-crossing points corresponding to a desired
motor position resolution; and

determine a motor position based on the plurality of auxiliary signals.

US Pat. No. 9,297,321

FLEXIBLE CRANK ANGLE POSITION SENSING

Woodward, Inc., Fort Col...

1. A device for determining angular position of an encoder wheel associated with a crankshaft of an internal combustion engine,
the device comprising:
a first encoder wheel having a plurality of teeth;
a first sensor arranged in proximity to said first encoder wheel for detecting a first pattern from the first encoder wheel;
a memory for storing a first encoder wheel pattern data wherein the first encoder wheel pattern data describes the first pattern
in data;

a control unit comprising a pattern match block communicatively coupled to the first sensor and compares the first pattern
and the first encoder wheel pattern data;

wherein the first pattern contains at least one encoder key, and the first encoder wheel pattern data defines a data key that
corresponds to the encoder key;

wherein the at least one encoder key comprises at least one ratio, wherein the at least one ratio is a period of time of a
most recent encoder tooth of the plurality of teeth of the first encoder wheel sensed by the sensor to a period of time of
an encoder tooth of the plurality of teeth sensed by the sensor immediately prior the most recent encoder tooth sensed.

US Pat. No. 9,051,045

INDIRECT DRIVE ACTIVE CONTROL COLUMN

Woodward MPC, Inc., Skok...

1. An indirect drive active control column comprising:
a stick moveable relative to a mechanical ground;
a passive feedback arrangement movable relative to the mechanical ground, the passive feedback arrangement directly acting
on the stick providing a passive feedback force profile to the stick when the stick is moved relative to the passive feedback
arrangement;

an actuator coupled to the passive feedback arrangement for actively adjusting the position of the passive feedback arrangement
relative to the mechanical ground; and

wherein the passive feedback assembly includes a cam including a cam surface and a resistance arrangement, the cam surface
defining a feedback neutral position, the stick includes a cam follower following the cam surface, wherein the resistance
arrangement increasingly biases the cam surface to resists movement of the cam follower from the feedback neutral position
to provide the passive tactile feedback.

US Pat. No. 9,860,304

REDUNDANT CAN INTERFACE FOR DUAL ACTUATION SYSTEMS

Woodward, Inc., Fort Col...

1. An actuator controller comprising:
a first controller area network (CAN) bus communication node associated with a first CAN node communication address that identifies
the first CAN bus communication node and comprising:

a first CAN bus communication port;
a second CAN bus communication port associated with a second CAN node communication address that identifies another CAN bus
communication node; and

a router responsive to CAN-format messages received at the first CAN bus communication port and the second CAN bus communication
port to:

receive a first CAN-format message, including the first CAN node communication address, at the first CAN bus communication
port and route the first CAN-format message to the first CAN bus communication node;

receive a CAN-format second message, including the second CAN node communication address, at the first CAN bus communication
port and route the second CAN-format message to the second CAN bus communication port; and

receive a third CAN-format message, including the first CAN node communication address, at the second CAN node communication
port and route the third CAN-format message to the first CAN bus communication node.

US Pat. No. 9,291,139

DUAL ACTION FUEL INJECTION NOZZLE

Woodward, Inc., Fort Col...

1. A fuel injection nozzle comprising:
a nozzle body, the nozzle body defining a central bore;
a fuel atomizer disposed in the central bore, the fuel atomizer defining a spill-return bore and a swirl chamber, the swirl
chamber in fluid communication with the central bore, the spill-return bore including a return swirler proximate the swirl
chamber; and

an air supply pump coupled to the fuel atomizer and in fluid communication with the spill-return bore, wherein the air supply
pump is configured to selectively inject air into the swirl chamber through the spill-return bore.

US Pat. No. 9,234,535

ROTARY PISTON TYPE ACTUATOR

Woodward, Inc., Fort Col...

19. A method of rotary actuation comprising:
providing a rotary actuator comprising:
a first housing defining a first arcuate chamber comprising a first cavity, a first fluid port in fluid communication with
the first cavity, and an open end, wherein the first housing defining the first arcuate chamber is formed from a single piece
of material;

a rotor assembly rotatably journaled in said first housing and comprising a rotary output shaft and a first rotor arm extending
radially outward from the rotary output shaft; and an arcuate-shaped first piston disposed in said first housing for reciprocal
movement in the first arcuate chamber through the open end, wherein a first seal, the first cavity, and the first piston define
a first pressure chamber, and a first portion of the first piston contacts the first rotor arm;

applying pressurized fluid to the first pressure chamber;
urging the first piston partially outward from the first pressure chamber to urge rotation of the rotary output shaft in a
first direction;

rotating the rotary output shaft in a second direction opposite that of the first direction; and,
urging the first piston partially into the first pressure chamber to urge pressurized fluid out the first fluid port.

US Pat. No. 9,225,284

CONTROLLING AN ELECTRICALLY-DRIVEN ACTUATOR

Woodward, Inc., Fort Col...

1. A method of controlling an electrically-driven actuator, the method comprising:
receiving an input voltage at a voltage boost converter of an electrical positioning driver in an actuation system;
applying the input voltage to a voltage bus of the electrical positioning driver;
converting a voltage on the voltage bus to an actuator power signal that controls a position of the electrically-driven actuator;
receiving a load status at the voltage boost converter, the load status comprising load status information relating to the
position of the electrically-driven actuator; and

boosting the voltage on the voltage bus, by selective operation of the voltage boost converter based on the load status, to
control performance of the electrically-driven actuator.

US Pat. No. 9,476,358

PARALLEL METERING PRESSURE REGULATION SYSTEM FOR A THERMAL EFFICIENT METERING SYSTEM

Woodward, Inc., Fort Col...

1. A fuel pressure regulation system, comprising:
a supply arrangement for supplying an outlet flow at a first pressure;
a primary metering circuit, an inlet of which receives a first portion of the outlet flow of the supply arrangement, the primary
metering circuit comprising a fuel metering valve and a primary pressure regulator, the primary pressure regulator fluidly
connected to an outlet of the fuel metering valve;

at least one secondary metering circuit, the primary pressure regulator operably connected to the at least one secondary metering
circuit to sense a pressure of the at least one secondary metering circuit;

a bypass regulator connected in parallel with the primary metering circuit and the least one secondary metering circuit such
that an inlet of the bypass regulator receives a second portion of the outlet flow of the supply arrangement; and

wherein the bypass regulator is operably connected on an outlet side of the fuel metering valve to sense a pressure in the
primary metering circuit downstream from the fuel metering valve.

US Pat. No. 9,557,170

SYSTEM AND METHOD OF DETERMINING THE ANGULAR POSITION OF A ROTATING ROLL

Stowe Woodward Licensco, ...

1. A method of determining the angular position of a roll, comprising:
(a) detecting signals generated by an accelerometer attached to an end of a rotating roll, the roll including a plurality
of sensors configured to detect an operational parameter;

(b) determining whether a signal generated in step (a) has reached a pre-trigger threshold, and repeating step (a) if the
signal has not reached the pre-trigger threshold;

(c) if the signal is determined in step (b) to have reached the pre-trigger threshold, detecting a subsequent signal generated
by the accelerometer;

(d) determining whether the signal detected in step (c) has reached a trigger threshold, and repeating step (c) if the signal
has not reached the trigger threshold;

(e) if the signal has reached the trigger threshold, establishing the angular position of the roll based on the signal that
has reached the trigger threshold;

(f) gathering operational parameter data with the plurality of sensors;
(g) correlating the operational parameter data gathered in step (f) with individual ones of the plurality of sensors based
on the angular position of the roll established in step (e); and

(h) adjusting a position of the roll based on the operational parameter data gathered in step (f) and correlated in step (g).

US Pat. No. 9,482,686

AIRCRAFT WHEEL SPEED SENSOR

Woodward, Inc., Fort Col...

1. A method of sensing aircraft wheel speed, the method comprising:
receiving a carrier voltage signal at a stator winding via a pair of conductors coupled to the stator winding, the carrier
voltage signal comprising a steady state alternating voltage signal, the stator winding disposed in a stator that defines
an inner circumference about a rotor that moves within the stator upon rotation of an aircraft wheel, the stator comprising
major stator teeth, minor stator teeth extending toward the rotor from the major stator teeth, and minor stator slots between
adjacent pairs of the minor stator teeth, each minor stator tooth being narrower than its two neighboring minor stator slots,
and the rotor comprising rotor teeth extending toward the minor stator teeth and rotor slots between adjacent pairs of the
rotor teeth, each rotor tooth being narrower than its two neighboring rotor slots;

rendering a modulated current signal on the pair of conductors in response to movement of the rotor, the modulated current
signal comprising a variable-frequency-modulation to the carrier voltage signal and having a frequency that is dependent on
a rotational speed of the aircraft wheel;

detecting the modulated current signal;
generating a square wave logic signal having the frequency of the modulated current signal; and
providing the square wave logic signal to an aircraft control system.

US Pat. No. 9,429,120

DETECTING LEAKS IN A FEEDTHROUGH DEVICE

Woodward, Inc., Fort Col...

1. A fuel injector system comprising:
a partition between a high pressure zone, a low pressure zone, and a leak detection port of the fuel injector system; and
a feedthrough device disposed in the partition between the high pressure zone, the low pressure zone, and the leak detection
port, the feedthrough device comprising a continuous feedthrough body and one or more conductors extending through the feedthrough
body, the continuous feedthrough body having a first outer end face at the high pressure zone, a second outer end face opposite
the first end at the low pressure zone, an outer surface extending between the first outer end face and the second outer end
face, and an internal cavity defined therewithin, the conductors passing between and exposed to both the high pressure zone
and the low pressure zone within the internal cavity, and one or more fluid passages through the outer surface of the continuous
feedthrough body allowing fluid communication between the internal cavity and the leak detection port.

US Pat. No. 9,429,978

PASSIVE CONTROL STICK

Woodward, Inc., Fort Col...

1. A control apparatus comprising:
a first mounting plate;
a restoring plate having a first surface disposed adjacent the first mounting plate, and a second surface;
an elongate member comprising:
a first elongate portion;
a second elongate portion comprising a compliant member and a retaining portion;
an axis member between the first elongate portion and the second elongate portion, pivotally mounting the elongate member
to the first mounting plate and defining a first axis; and

a force plate having a substantially flat surface disposed adjacent the second surface of the restoring plate;
wherein the compliant member provides a biasing force between the retaining portion and the force plate against the second
surface of the restoring plate in which contact between the force plate and the second surface, provided by the biasing force,
provides a restoring torque that urges pivotal movement of the elongate member about the first axis away from a non-centered
position and toward a center position, and the mass of the second elongate portion substantially balances the mass of the
first elongate portion about the axis member.

US Pat. No. 9,309,835

ENGINE AND THRUST REVERSER ACTUATION SYSTEM

Woodward HRT, Inc., Vale...

1. A turbofan engine comprising:
a turbofan engine;
a nacelle surrounding the turbofan engine and defining an annular bypass duct through the turbofan engine to define a generally
forward-to-aft bypass air flow path;

a thrust reverser having at least one movable element, movable to and from a reversing position where at least a portion of
the bypass air flow is reversed;

a hydraulic actuator, comprising a valve operable to control a flow of hydraulic fluid to the hydraulic actuator, coupled
to the at least one movable element to move the at least one movable element into and out of the reversing position;

a hydraulic lockout mechanically linked to the valve and movable between an inhibit condition, wherein movement of the valve
is prevented, and a permit condition, wherein movement of the valve is permitted; and

a lockout actuator mechanically linked to the hydraulic lockout and located remotely from the hydraulic lockout, wherein the
hydraulic lockout may be placed in either the inhibit or permit condition without requiring access to the hydraulic lockout;

wherein the hydraulic lockout is mechanically linked to the valve of the hydraulic actuator to prevent movement of the valve
and the hydraulic actuator when the hydraulic actuator is in the inhibit condition.

US Pat. No. 9,126,676

COMPACT TWO AXIS GIMBAL FOR CONTROL STICK

Woodward MPC, Inc., Skok...

15. An apparatus for providing force feedback to a pilot input device comprising:
a force feedback drive including:
a motor including an output shaft; and
a gear train including a sun gear mounted to the output shaft of the motor, a plurality of planet gears mounted to a fixed
position carrier, the fixed position carrier being fixed during all phases of operation, and a ring gear, the plurality of
planet gears radially positioned between the sun gear and the ring gear; and

a linkage configured to operably couple the force feedback drive to the pilot input device, the linkage is configured to be
operably coupled to the pilot input device, the linkage being operably coupled to the ring gear such that rotation of the
pitch ring gear causes motion of the linkage.

US Pat. No. 10,090,680

HIGH ACCURACY MAINS FILTER MONITORING FOR A MULTI-PHASE POWER SYSTEM

Woodward Kempen GmbH, Ke...

1. An apparatus for delivering electrical power, in particular for delivering regeneratively produced electrical power to a load impedance, having at least one converter and at least one filter,characterised in that
means for determining at least one filter current of at least one filter are provided, which are designed to allow a determination of the at least one filter current during operation of the apparatus, wherein comparison means are provided, which using the desired value and actual value of the filter current and a predefinable error criterion generate an error information signal, wherein as means for determining the at least one filter current only one single phase current sensor for measuring the current in only one phase of the at least one filter is provided or two single phase current sensors for measuring the current in only two phases of the at least one filter are provided or at least one current sensor configured to measure the differential filter current between two phases of the at least one filter are provided.

US Pat. No. 9,650,744

SUCTION ROLL WITH SENSORS FOR DETECTING OPERATIONAL PARAMETERS

Stowe Woodward Licensco L...

1. An industrial roll, comprising:
a substantially cylindrical shell having an outer surface and an internal lumen;
a polymeric cover circumferentially overlying the shell outer surface, wherein the shell and cover have a plurality of through
holes that provide fluid communication between the lumen and the atmosphere; and

a sensing system comprising:
a plurality of sensors embedded in the cover, the sensors configured to sense an operating parameter of the roll and provide
signals related to the operating parameter;

at least one signal-carrying member connected with at least one of the sensors, wherein the signal-carrying member includes
openings that align at least partially with some of the through holes of the shell and cover; and

a processor operatively associated with the sensors that processes signals provided by the sensors.

US Pat. No. 9,461,577

CONTROLLING AN ELECTRICALLY-DRIVEN ACTUATOR

Woodward, Inc., Fort Col...

1. A method of exciting an electrically-driven load, the method comprising:
receiving an input voltage at a voltage boost converter of an electrical driver;
applying the input voltage to a voltage bus of the electrical driver;
converting a voltage on the voltage bus to power signal that drives the electrically-driven load;
receiving a load status at the voltage boost converter, the load status comprising load status information relating to the
electrically-driven load; and

boosting the voltage on the voltage bus, by operation of the voltage boost converter based on the load status, to control
performance of the electrically-driven load.

US Pat. No. 9,405,312

ACTIVE CONTROL COLUMN WITH MANUALLY ACTIVATED REVERSION TO PASSIVE CONTROL COLUMN

Woodward MPC, Inc., Skok...

1. A control column for an aircraft comprising:
a passive feedback arrangement moveable relative to a mechanical ground;
a stick movable relative to the mechanical ground; and
a ground lock mechanism having a locked state in which the passive feedback arrangement is maintained in a fixed position
relative to the mechanical ground and a normal state in which the passive feedback arrangement is permitted to move relative
to the mechanical ground;

an actuator operably coupled to the passive feedback arrangement when the ground lock mechanism is in the normal state to
move the passive feedback arrangement relative to the mechanical ground; and

wherein the ground lock mechanism further includes an intermediate transition state in which the passive feedback arrangement
is permitted to move relative to the mechanical ground and the actuator is operably de-coupled from the passive feedback arrangement
such that the passive feedback arrangement can be moved relative to the mechanical ground independent of the actuator.

US Pat. No. 9,109,536

ENGINE THRUST REVERSER LOCK

Woodward HRT, Inc., Vale...

1. An aircraft engine thrust reverser lock system comprising:
a pin-capturing member comprising a body that is rotatable about a rotational axis, the rotational axis being defined by a
pivot that extends through the body, the body including:

an interior surface that defines a slot, the interior surface defining first and second fixed, opposing slot sides between
an open end of the slot and a closed end of the slot, an opening between the first and second slot sides at the open end of
the slot being sized to receive a pin into the slot;

the first slot side including:
an end wall surface that extends from the open end of the slot and faces the rotational axis;
a first sidewall surface that extends from the end wall surface toward the closed end of the slot; and
the second slot side including a protruded sidewall surface that protrudes into the slot toward the first sidewall surface
and defines an apex between the open and closed ends of the slot, the protruded sidewall surface facing the end wall surface
between the apex and the open end of the slot, the protruded sidewall surface facing the rotational axis between the apex
and the closed end of the slot, the protruded sidewall surface including a first side that faces the rotational axis and a
second side that faces away from the rotational axis, the first and second sides of the protruded sidewall surface defining
an acute angle with respect to the apex,

the protruded sidewall surface configured to cause the body to rotate about the rotational axis in response to the pin passing
over the protruded sidewall surface during movement of the pin toward the closed end of the slot, the apex located at a position
on the protruded sidewall surface so that the pin comes to rest with clearance between the pin and the interior surface when
the pin and pin-capturing member are in a locked configuration.

US Pat. No. 10,135,367

INTEGRATED SOFT START AND SAFETY SHUTDOWN

Woodward, Inc., Fort Col...

1. A current control assembly comprising:an electrical current flow path having a maximum current flow rate;
a first current limiter in the electrical current flow path, the first current limiter comprising circuitry configured to (i) in response to receipt of a first state of the first signal at a first input port, begin a soft start time period, restrict current flow from the electrical input toward the electrical load along the electrical current flow path to a restricted rate greater than zero current flow and less than the maximum current flow rate for the duration of the soft start time period, and permit current flow along the electrical current flow path from the electrical input toward the electrical load along the electrical current flow path at an unrestricted rate upon expiration of the soft start time, and (ii) stop current flow from the electrical input toward the electrical load along the electrical current flow path in response to a second state of the first signal; and
a second current limiter in the electrical current flow path and in series electrical connection with the first current limiter such that current flows through both current limiters simultaneously, the second current limiter arranged to interrupt current flow from the electrical input toward the electrical load along the electrical current flow path in response to receipt of a second signal at a second input port.

US Pat. No. 9,653,886

CAP SHIELDED IGNITION SYSTEM

Woodward, Inc., Fort Col...

1. A system for igniting a mixture in a main combustion chamber of an internal combustion engine, the system comprising:
an elongate plug body generally residing around a center longitudinal axis and adapted to couple to the internal combustion
engine;

a first ignition body residing about an end of the plug body;
a second ignition body adjacent the first ignition body to define a flame kernel initiation gap between the second ignition
body and the first ignition body;

a transversely extending unapertured cap at the end of the plug body longitudinally spaced from the plug body by a support
comprising a leg that is radially offset from the center longitudinal axis, the support defining a peripheral opening around
a perimeter of the cap where a total radially-facing area of the support is less than a total area of the peripheral opening,
and where the smallest transverse dimension of the cap is greater than the maximum transverse dimension of the first ignition
body and maximum transverse dimension of the second ignition body and where a portion of the cap extends beyond the second
ignition body in all radial directions from the center longitudinal axis; and

an enclosure receiving the elongate plug body, the enclosure comprising a jet passage and defining a chamber about the end
of the plug body that encloses the first and second ignition bodies and the unapertured cap, the chamber adapted to receive
a flow from the main combustion chamber through the jet passage, and the jet passage comprises a nozzle portion configured
to direct the flow along a trajectory to the unapertured cap.

US Pat. No. 9,673,804

CIRCUIT ARRANGEMENT OF ELECTRONIC CIRCUIT BREAKERS OF A POWER GENERATION DEVICE

Woodward Kempen GmbH, Ke...

1. A circuit arrangement comprising at least one electronic power switch, at least one capacitor and a plate-shaped direct
current laminate, the direct current laminate having at least two metal plates insulated from one another for carrying current
and a plurality of connection elements arranged at a first spacing to electrically connect the metal plates to the at least
one capacitor, the at least one capacitor being electrically conductively connected by the connection elements arranged at
the first spacing to the direct current laminate and the at least one capacitor being arranged on one side of the direct current
laminate, wherein the direct current laminate additionally has a plurality of connection elements arranged at a second spacing
to connect the direct current laminate to at least one electronic power switch of the circuit arrangement, in that at least
one electronic power switch is electrically connected by the connection elements arranged at the second spacing to the direct
current laminate and is arranged on the opposing side of the direct current laminate, wherein at least one adapter laminate
is provided to connect the electronic power switches, the adapter laminate having connection elements adapted to the electronic
power switches on one connection side and having connection elements adapted to the second spacing on the other connection
side and wherein an entirety of the adapter laminate comprises only two current carrying layers and wherein the electronic
power switches arranged on one side of the direct current laminate at least partially have a common cooling body.

US Pat. No. 9,431,898

BIDIRECTIONAL DC-TO-DC CONVERTER

Woodward IDS Switzerland ...

1. A bidirectional DC-to-DC converter for converting electrical energy from a first DC source and a second DC source, comprising:
an output capacitor configured to provide an output voltage, wherein a positive contact of the first DC source is connected
to a positive DC output of the bidirectional DC-to-DC converter and a connection of the output capacitor, and a negative contact
of the second DC source is connected to a negative DC output of the bidirectional DC-to-DC converter and the second connection
of the output capacitor;

a first and a second storage inductor, wherein the first storage inductor is arranged between a positive connection of the
second DC source and a first contact of a first electronic switch, and wherein the second storage inductor is arranged between
a negative connection of the first DC source and a second contact of the first electronic switch;

a buffer capacitor arranged between the negative output of the first DC source and the positive output of the second DC source;
a second electronic switch and a third electronic switch arranged in series with the first electronic switch, wherein the
second electronic switch is arranged between the first contact of the first electronic switch and the positive DC output,
and the third electronic switch is arranged between the second contact of the first electronic switch and the negative DC
output,

wherein by switching on and off the first, second or third electronic switch, a differential voltage across the buffer capacitor
can be regulated, and a first DC current of the first DC source and a second DC current of the second DC source from the first
and second DC source to the DC output or from the DC output to the first and second DC source can be set.

US Pat. No. 9,133,795

ENGINE USING SPLIT FLOW EXHAUST SYSTEM AND METHODS

Woodward, Inc., Fort Col...

1. An internal combustion engine system comprising:
an internal combustion engine defining a combustion cylinder;
an intake system to deliver intake gases to the engine;
an exhaust system to carry exhaust gases away from the engine, the exhaust system comprising:
a high pressure exhaust manifold;
a high pressure exhaust valve interposed between the combustion cylinder and the high pressure exhaust manifold;
a low pressure exhaust manifold;
a low pressure exhaust valve interposed between the combustion cylinder and the low pressure exhaust manifold;
a turbocharger including a turbine in the exhaust system in fluid communication with the high pressure exhaust manifold;
an exhaust gas recirculation system (EGR system) fluidly coupling the low pressure exhaust manifold to the air intake system,
the EGR system being free of an exhaust gas recirculation valve (EGR valve) interposed between the low pressure exhaust manifold
and the air intake system.

US Pat. No. 9,581,226

BARREL CAM RUDDER PEDAL SYSTEM

Woodward MPC, Inc., Skok...

1. A rudder pedal system, comprising:
an outer housing;
a chassis assembly carried by the outer housing;
a barrel cam arrangement rotationally mounted within an interior space of the chassis assembly;
a pair of pedal assemblies mechanically coupled to the barrel cam arrangement such that linear movement of either of the pair
of pedal assemblies results in a rotation of the barrel cam arrangement about a central longitudinal axis defined by the barrel
cam arrangement.

US Pat. No. 9,261,894

MULTIPLE DEGREES OF TRANSLATIONAL ADJUSTMENT PEDALS

Woodward, Inc., Fort Col...

1. A pedal system for an aircraft comprising:
a pedal configured for manipulation through at least one operational degree of freedom by a pilot to provide control inputs
to the aircraft;

a pedal mounting mechanism configured for supporting the pedal within a cockpit of the aircraft for manipulation by the pilot,
the pedal mounting mechanism providing at least two adjustment degrees of freedom for adjusting the position of the pedal;

wherein the at least two adjustment degrees of freedom includes a first adjustment degree of freedom that is a rotational
degree of freedom and a second adjustment degree of freedom that is a translational degree of freedom.

US Pat. No. 9,172,217

PRE-CHAMBER SPARK PLUG WITH TUBULAR ELECTRODE AND METHOD OF MANUFACTURING SAME

Woodward, Inc., Fort Col...

1. A pre-chamber spark plug comprising:
a pre-chamber housing defining an enclosed pre-chamber;
an insulator at the back of the pre-chamber;
a center electrode in the pre-chamber housing, the center electrode comprising a first portion surrounded by the insulator
and a second portion that extends forward from the insulator into the pre-chamber; and

a ground electrode in the pre-chamber housing, the ground electrode comprising:
an electrode portion spaced in surrounding relation to the center electrode to define a spark gap between the ground electrode
and the center electrode, and

a tubular portion extending axially forward, beyond the center electrode, the electrode portion and tubular portion defining
a central opening through the ground electrode having both ends open to the interior of the enclosed pre-chamber.

US Pat. No. 9,695,834

LOAD SHARING CONTROL FOR COMPRESSORS IN SERIES

Woodward, Inc., Fort Col...

8. A non-transitory computer-readable medium storing instructions that, when executed by data processing apparatus, perform
operations for balancing load of a compressor system that includes two or more compressors connected in series, the operations
comprising:
identifying a process variable of a performance controller;
identifying a load sharing parameter of a load sharing controller;
determining, dynamically during operation of the two or more compressors by the load sharing controller, a process control
setpoint for the process variable of the performance controller based on the load sharing parameter;

controlling a control mechanism based on the process control setpoint and the process variable; wherein the control mechanism
is a secondary control mechanism, and the performance controller is a secondary performance controller;

wherein identifying the process variable of the performance controller comprises identifying pressure between the secondary
control mechanism and a primary control mechanism controlled by a primary performance controller as the process variable of
the secondary performance controller; and

wherein controlling the control mechanism based on the process control setpoint and the process variable comprises controlling
the secondary control mechanism to operate consistently with the primary control mechanism based on the process control setpoint
and the pressure between the secondary control mechanism and the primary control mechanism; wherein controlling the secondary
control mechanism to operate consistently with the primary control mechanism controlled by the primary performance controller
comprises controlling the secondary control mechanism to move in the same direction as the primary control mechanism when
responding to a change in a process variable or a setpoint of the primary control mechanism.

US Pat. No. 9,765,682

MULTI-CHAMBER IGNITER

Woodward, Inc., Fort Col...

1. A system for igniting a mixture in an internal combustion engine, the system comprising:
an ignition plug comprising an igniter; and
an enclosure comprising a plug receptacle that receives the ignition plug and an engine coolant passage around the plug receptacle,
the enclosure defining an outer chamber about an end of the ignition plug that is larger in volume than a fluid containing
interior chamber enclosing the igniter, the outer chamber comprising a jet passage between an interior and an exterior of
the enclosure, the outer chamber curved to direct flow incoming through the jet passage to circulate in the outer chamber
and recombine with the incoming flow,

wherein the enclosure comprises a first part comprising the jet passage and the outer chamber and a second part coupled to
the first part defining the plug receptacle, and

wherein the second part contacts the first part only at opposing ends of the engine coolant passage.

US Pat. No. 9,709,078

ROTARY PISTON TYPE ACTUATOR WITH A CENTRAL ACTUATION ASSEMBLY

Woodward, Inc., Fort Col...

1. A rotary actuator comprising:
a housing;
a rotor assembly rotatably journaled in said housing and including a rotary output shaft and a first rotor arm extending radially
outward from the rotary output shaft;

a centrally located actuation assembly including a centrally located mounting point formed in an external surface of the rotary
output shaft, said centrally located mounting point being located proximal to the longitudinal midpoint of the rotary output
shaft, wherein the centrally located actuation assembly further includes a radial recess formed in an external peripheral
surface of the housing proximal to the centrally located mounting point of the rotor shaft;

an actuation arm removably attached at a proximal end to the centrally located mounting point, said actuation arm adapted
at a distal end for attachment to an external mounting feature of a member to be actuated, and wherein said actuation arm
extends through the radial recess; and

a centrally located mounting assembly comprising a radially projecting portion of the housing, said centrally located mounting
assembly axially disposed about 180 degrees from the radial recess of the centrally located actuation assembly, said centrally
located mounting assembly adapted for attachment to an external mounting feature.

US Pat. No. 9,840,963

PARALLEL PRECHAMBER IGNITION SYSTEM

Woodward, Inc., Fort Col...

1. A system for igniting a mixture in an internal combustion engine, the system comprising:
an elongate plug body generally residing around a center longitudinal axis and adapted to couple to the internal combustion
engine;

a first ignition body residing about an end of the plug body;
a second ignition body adjacent the first ignition body to define a flame kernel initiation gap between the second ignition
body and the first ignition body; and

an enclosure defining a first chamber enclosing the first and second ignition bodies and defining a second chamber adjacent
the first chamber and connected to the first chamber via a first passage, the enclosure comprising a plurality of jet apertures
between the interior of the first chamber and the exterior of the enclosure, the first chamber comprising a first inner chamber
and a first outer chamber connected by a second passage, the inner chamber enclosing the first and second ignition bodies
and the outer chamber connected to the second chamber via the first passage.

US Pat. No. 9,790,892

ENGINE THRUST REVERSER LOCK

Woodward HRT, Inc., Vale...

1. An aircraft engine thrust reverser locking method, comprising:
maintaining a pin-capturing member in an up position, the pin-capturing member being rotatable about a rotational axis between
the up position and a down position, the pin-capturing member comprising an inner surface that defines first and second fixed,
opposing slot sides that extend between open and closed ends of a slot within the pin-capturing member, the inner surface
including a follower surface extending from the open end toward the closed end, the follower surface comprising an apex, a
first side and a second side, the first side facing the rotational axis between the apex and the closed end of the slot, the
first and second sides of the follower surface defining an acute angle with respect to the apex;

translating a pin in a first direction with respect to the rotational axis from an exterior of the pin-capturing member through
the open end of the slot and into contact with the follower surface;

rotating the pin-capturing member from the up position toward the down position by translating the pin in the first direction
while contacting the follower surface; and

disengaging the pin from the inner surface by translating the pin within the slot in the first direction, toward the closed
end of the slot, the apex located at a position on the follower surface that allows the pin to come to rest with clearance
between the pin and the interior surface when the pin and pin-capturing member reach a locked configuration.

US Pat. No. 9,625,053

HYDRAULIC ACTUATOR LOCKOUT

Woodward, Inc., Fort Col...

1. A fluid control apparatus comprising:
a valve comprising:
a valve housing having an axial bore extending between a first end and a second end, a first inlet port in fluid communication
with the axial bore, and a first outlet port in fluid communication with the axial bore; and

a piston located within the axial bore and having a first fluid passage and configured for reciprocal axial movement of the
piston within the axial bore between a first position in which the first fluid passage aligns axially with the first inlet
port and the first outlet port to form a first fluidic circuit in the first position, and a second position in which the piston
blocks at least one of the first inlet port and the first outlet port; and

a lockout assembly comprising:
a stop comprising a cam configurable to a first rotary position in a first configuration and a second rotary position in a
second configuration; and

a lever arm configured to reversibly secure the lockout assembly to a fastener in a first lever arm position to fix the piston
into a selected position in the first configuration in which the stop contacts the piston, and not interfere with reciprocal
axial movement of the piston in the second configuration in which the stop does not contact the piston.

US Pat. No. 9,587,833

COMBUSTOR WITH STAGED, AXIALLY OFFSET COMBUSTION

Woodward, Inc., Fort Col...

1. A gas turbine combustor dome assembly arranged around a longitudinal axis, the gas turbine combustor dome assembly comprising:
a first fuel/air mixer assembly, the first fuel/air mixer assembly comprising a fuel first injector and a plurality of first
fuel/air mixer elements, each first mixer element defining an air flow passage therethrough having an outlet in a first plane;
and

a second fuel/air mixer assembly, the second fuel/air mixer assembly comprising a second fuel injector and a plurality of
second fuel/air mixer elements, each second mixer element defining an air flow passage therethrough having an outlet in a
second plane, longitudinally offset from the first plane.

US Pat. No. 9,574,558

HIGH PRESSURE GEAR PUMP WITH DUAL WALL HOUSING

Woodward, Inc., Fort Col...

1. A gear pump housing comprising:
a pump housing having:
an inner wall defining an inner pumping cavity having a pumping cavity inlet and a pumping cavity outlet; and
an outer wall surrounding at least a portion of the inner wall, the outer wall being spaced apart from the inner wall defining
a pressure cavity between the inner and outer walls, the pumping cavity outlet being in fluid communication with the pressure
cavity;

wherein the pump housing is an assembly of components including:
an inner housing member that defines the inner wall, wherein the inner housing member defines a high pressure outlet, the
pressure cavity fluidly coupling the pumping cavity outlet with the high pressure outlet; and

an outer housing member that defines the outer wall.

US Pat. No. 10,029,203

SEPARATION APPARATUS FOR A GAS COMPONENT FROM SPENT DRILLING MUD

1. A separation apparatus, the apparatus comprising:a fluid chamber;
an inlet to the fluid chamber for receiving a gas component of spent drilling mud;
an outlet for directing a purified gas out of the fluid chamber;
a splash plate disposed in the fluid chamber adjacent to the inlet to force the gas component of the spent drilling mud downward in the fluid chamber;
at least one vertically or horizontally disposed rod elements disposed in the fluid chamber between the inlet and the splash plate to disperse the gas component of the spent drilling mud entering the fluid chamber; and
at least one separation plate extending from the splash plate and having a plurality of holes disposed therein, the entire at least one separation plate positioned between the splash plate and the outlet to separate purified gas from the gas component of the spent drilling mud and the splash plate located entirely between the inlet and the at least one separation plate.

US Pat. No. 9,998,028

LOW INDUCTIVITY CIRCUIT ARRANGEMENT OF AN INVERTER

Woodward Kempen GmbH, Ke...

1. Circuit arrangement of a phase leg of a three-point converter comprising:three DC connections for positive, negative and zero potential and an AC connection,
a first pair of series-connected semiconductor switching elements, which connect the positive DC-potential to the AC connection,
a second pair of series-connected semiconductor switching elements, which connect the negative DC-potential to the AC connection,
two circuit means for connecting the DC zero potential via in each case one of the series-connected semiconductor switching elements of each pair to the AC connection,
a cooling body with a first cooling surface, wherein the semiconductor switching elements and the circuit means are installed in a common plane on the first cooling surface of the cooling body,
connecting bars that extend perpendicularly to the first cooling surface of the cooling body and provide an electrical connection of the semiconductor switching elements to the circuit means, the DC connections and the AC connection of the circuit arrangement, wherein the connecting bars have means for establishing electrical contact with the semiconductor switching elements, characterized in that
the individual connecting bars have at least one region, in which at least two connecting bars are arranged parallel and directly adjacent to one another and during the switching over between two switching states the current flow directions are identical, so that the change in flow generated by the change in current in one connecting bar can be at least partially compensated by the change in current in the other connecting bar, and in each case exactly two connecting bars, which serve for the establishment of electrical contact with an individual semiconductor switching element, are arranged parallel and directly adjacent to one another in the region of the connections of the respective semiconductor switching elements.

US Pat. No. 9,605,692

LOCKING ROTARY ACTUATOR

Woodward, Inc., Fort Col...

1. A locking apparatus for a rotary actuator, comprising:
an outer housing comprising a cylindrical interior surface having a radial recess having at least one circumferential end
formed therein;

a rotor disposed within the outer housing and comprising;
a cylindrical exterior surface rotatable within the cylindrical interior surface;
an axial interior cavity; and
a port disposed to be capable of rotational alignment with the radial recess and extending radially from the axial interior
cavity to the cylindrical exterior surface; and,

a piston disposed for axially reciprocal movement within the axial interior cavity between a first position and a second position
and comprising:

a first portion having a first thickness;
a second portion having a second thickness larger than the first thickness; and
a piston bevel extending axially from the first portion to the second portion; and,
a key disposed for radially reciprocal movement within the port and comprising:
a radially proximal end having a first key bevel complementary to the piston bevel; and,
a radially distal end; and
a body extending from the radially proximal end to the radially distal end such that the radially proximal end contacts the
second portion and the radially distal end extends into the radial recess when the piston is in the second position, and the
radially proximal end contacts the first portion and the radially distal end does not extend into the radial recess when the
piston is in the first position.

US Pat. No. 9,574,448

SPLIT CONTROL UNIT

Woodward, Inc., Fort Col...

1. A split control unit to provide a continuous cooling flow in a distributed flow system, the split control unit comprising:
a flow inlet configured to receive a fuel flow;
a first manifold having flow lines to supply fuel to one or more primary nozzles;
a second manifold having flow lines to supply fuel to one or more secondary nozzles, the second manifold in fluid communication
with the flow inlet;

a metering valve having a first port in fluid communication with the flow inlet and with the second manifold, the metering
valve configured to supply a metered fuel flow to the first manifold; and

a flow passage in fluid communication with, and running between, a flow line of the first manifold and a flow line of the
second manifolds to allow for a continuous cooling flow in the second manifold when all of the one or more secondary nozzles
are closed.

US Pat. No. 9,816,537

ROTARY PISTON TYPE ACTUATOR WITH A CENTRAL ACTUATION ASSEMBLY

Woodward, Inc., Fort Col...

1. A rotary actuator comprising:
a housing;
a rotor assembly rotatably journaled in said housing and including a rotary output shaft;
a central actuation assembly including a central mounting point formed in an external surface of the rotary output shaft,
said central mounting point proximal to the longitudinal midpoint of the rotary output shaft, and a radial recess formed in
an external peripheral surface of the housing proximal to the central mounting point of the rotary output shaft;

a mounting assembly adapted for attachment to an external mounting connector of a mounting surface of an aircraft structural
member; and

an actuation arm extending through the radial recess and removably attached at a proximal end to the central mounting point,
said actuation arm adapted at a distal end for attachment to an external mounting feature of an aircraft assembly to be actuated.

US Pat. No. 9,387,522

DIGITAL CLOSED LOOP PROPORTIONAL HYDRAULIC PRESSURE CONTROLLER

Woodward, Inc., Fort Col...

1. A method of preventing malfunction of a current-to-pressure converter (CPC), comprising the step of periodically imparting
symmetrically-opposed movement of a control valve of the CPC to loosen and flush accumulated silt therefrom, wherein the step
of periodically imparting symmetrically-opposed movement of a control valve comprises the step of periodically introducing
a small-amplitude symmetrically-opposed impulse to a controller that actuates a hydraulic control shaft of a three-way rotary
valve, wherein the step of periodically introducing a small-amplitude symmetrically-opposed impulse to a controller comprises
periodically introducing a small-amplitude symmetrically-opposed impulse to a digital controller.

US Pat. No. 9,138,632

WHEELED SPORT APPARATUS, AS FOR TRAINING AND RECREATION

Powdr-Woodward PA LLC, P...

1. Wheeled sport apparatus comprising:
a platform having first and second ends and first and second side edges, having a top riding surface and a bottom surface;
a first set of wheels located proximate the first end of said platform, wherein at least two of said first set of wheels are
outboard wheels, wherein each of said first set of wheels extends above the top riding surface of said platform;

a second set of wheels located proximate the second end of said platform, wherein at least two of said second set of wheels
are outboard wheels, and wherein each of said second set of wheels extends above the top riding surface of said platform;
and

first and second carrier wheels disposed between said first and second sets of wheels and aligned along a longitudinal axis
along the length of the platform, the first carrier wheel being closer to the first set of wheels than to the second set of
wheels, the second carrier wheel being closer to the second set of wheels than to the first set of wheels, and a diameter
of the first and second carrier wheels being about the same as a diameter of each wheel of the first and second sets of wheels.

US Pat. No. 9,689,345

ELECTRIC TRACK LOCK

Woodward, Inc., Fort Col...

1. A track lock assembly comprising:
a pawl assembly comprising:
a pawl arm extending from a pawl axis to a distal end configured to engage a slot in a slider assembly and contact a slot
end of the slot;

a cam arm extending from the pawl axis and having a pawl cam; and
a biasing member configured to urge rotation of the pawl assembly about the pawl axis from a pawl locked position, such that
the distal end of the pawl arm is engaged in the slot and is positioned to contact the slot end upon movement of the slider
assembly and the pawl cam is disengaged from a slider cam extending from the slider assembly, to a pawl unlocked position
such that the distal end of the pawl arm is biased away from the slot to a position that does not interfere with movement
of the slider assembly and the pawl cam is biased toward contact with the slider cam extending from the slider assembly; and

a position lock assembly comprising a first lock arm extending from a lock axis and an actuator configured to urge rotation
of the first lock arm between a lock locked position and a lock unlocked position, the first lock arm configured to engage
and retain the cam arm in the pawl locked position when the first lock arm is in the lock locked position and disengage the
cam arm in the lock unlocked position such that the biasing member is able to urge the pawl assembly to the pawl unlocked
position.

US Pat. No. 9,476,434

ROTARY PISTON TYPE ACTUATOR WITH MODULAR HOUSING

Woodward, Inc., Fort Col...

12. A method of rotary actuation comprising:
providing a rotary actuator comprising:
a first piston housing assembly comprising a first cavity, a first fluid port in fluid communication with the first cavity,
and a first open end;

a second piston housing assembly comprising a second cavity, a second fluid port in fluid communication with the second cavity,
and a second open end;

a rotor assembly rotatably journaled in said first piston housing assembly and said second piston housing assembly, and comprising:
a rotary output shaft;
a first rotor arm extending radially outward from the rotary output shaft to a first distal end comprising one or more first
retainers;

a second rotor arm extending radially outward from the rotary output shaft to a second distal end comprising one or more second
retainers;

an arcuate-shaped first piston disposed in said first piston housing assembly for reciprocal movement in the first piston
housing assembly through the first open end along a first radius of curvature, wherein a first seal, the first cavity, and
the first piston define a first pressure chamber, and a first portion of the first piston connects to the first rotor arm
at a first end portion comprising one or more third retainers; and

an arcuate-shaped second piston disposed in said second piston housing assembly for reciprocal movement in the second piston
housing assembly through the second open end along a second radius of curvature, wherein a second seal, the second cavity,
and the second piston define a second pressure chamber, and a second portion of the second piston connects to the second rotor
arm at a second end portion comprising one or more fourth retainers, wherein the first retainers, the second retainers, and
the third retainers are intermeshed along the radius of curvature, movement of the rotor assembly urges movement of the first
piston and the second piston, and movement of the first piston and the second piston urges movement of the rotor assembly;

urging a portion of the first piston partially out of the first pressure chamber to urge rotation of the rotary output shaft
in a first direction;

rotating the rotary output shaft in a second direction opposite that of the first direction; and,
urging the first piston partially into the first pressure chamber to urge pressurized fluid out the first fluid port.

US Pat. No. 9,127,694

HIGH-FLOW ELECTRO-HYDRAULIC ACTUATOR

Woodward, Inc., Fort Col...

1. A valve assembly comprising:
a housing including at least one port; and
a rotary valve disposed within the housing, the rotary valve comprising:
an outer sleeve with at least one port aligned with the at least one port of the housing;
a spool rotationally disposed within the sleeve, the spool including a shaft and at least one valve element disposed along
the shaft, the at least one valve element including at least one port formed thereon;

a first and a second anti-friction element supporting opposing ends of the shaft of the spool;
a rotary electric actuating device coupled to an end of the shaft, the rotary electric actuating device operable to rotate
the spool to selectively align the at least one port of the spool with the at least one port of the sleeve; and

wherein the at least one port of the spool includes a bottom edge and a pair of opposed side edges depending away from the
bottom edge such that the at least one port has a generally U-shaped opening with an open end, with one of the pair of opposed
side edges forming a control edge having a first wall thickness, and wherein the other one of the pair of side edges has a
second wall thickness, the first wall thickness less than the second wall thickness.

US Pat. No. 9,856,836

VARIABLE FLUID FLOW APPARATUS WITH INTEGRATED FILTER

Woodward, Inc., Fort Col...

1. A fluid flow trim apparatus comprising:
an outer housing having an elongate body extending from a first end to a second end opposite the first end and defining a
cavity comprising an interior surface with a first cross-sectional area and an end wall at the second end, the end wall having
an orifice therethrough with a second cross-sectional area less than the first cross-sectional area;

a valve body having an elongate body and comprising:
a first valve portion disposed at least partly within the cavity and having a third cross-sectional area smaller than the
first cross-sectional area, the first valve portion and the interior surface defining a first fluid flow path;

a second valve portion in contact with the interior surface and having a channel formed therethrough defining a second fluid
flow path, the second valve portion, the interior surface, and the end wall defining a trim cavity; and

a third valve portion disposed at least partly within the cavity between the first valve portion and the second valve portion
and having a fourth cross-sectional area smaller than the second cross-sectional area, the second fluid flow path fluidically
connecting the third valve portion to the trim cavity; and

a filter media extending from the first valve portion to the second valve portion and dividing a third fluid flow path fluidically
connecting the first fluid flow path to the second fluid flow path; wherein the valve body is adjustably positionable within
the cavity to a selected position to modify a fifth cross-sectional area of a fourth fluid flow path fluidly connecting the
channel to the orifice through the trim cavity when a fluid is not flowing through the fluid flow trim apparatus, and the
valve body is not adjustably positionable within the second cavity portion when the fluid is flowing through the fluid flow
trim apparatus.

US Pat. No. 9,239,345

CONTROLLING A MOTOR WITH TWO OR MORE HALL SENSORS

Woodward, Inc., Fort Col...

1. A motor system comprising:
a motor comprising two Hall sensors configured to output binary values, the two Hall sensors being placed 120 electrical degrees
apart; and

a controller configured to control the motor, the controller being operable to:
monitor output signals of the two Hall sensors;
when the output signals of the two Hall sensors are different binary values, determine a third signal to be alternating between
the binary values at a frequency no less than a maximum state transition frequency of the motor;

control commutation of a drive current into the motor based on the third signal and the outputs of the two Hall sensors; and
update a motor position counter based on a logic state combination of the output signals of the two Hall sensors by steps
comprising:

monitoring a first logic state combination transitioning to a second logic state combination;
monitoring the second logic state combination transitioning to a third logic state combination;
when the third logic state combination comprises two same binary values;
comparing the third logic state combination with the first logic state combination;
if the third logic state combination is the same as the first logic state combination, updating the motor position counter
by one count; and

if the third logic state combination is not the same as the first logic state combination, updating the motor position counter
by two counts.

US Pat. No. 10,287,731

ABRASION-RESISTANT RUBBER ROLL COVER WITH POLYURETHANE COATING

Stowe Woodward Licensco L...

1. An industrial roll, comprising:a substantially cylindrical metallic core;
a rubber base layer that is adhered to and circumferentially overlies the core;
a rubber top stock layer that circumferentially overlies the base layer, wherein the top stock layer has a hardness of between about 30 and 300 P&J; and
a polyurethane coating that circumferentially overlies the top stock layer, wherein the coating has a hardness of between about 3 and 30 P&J; and
wherein the thickness of the coating is between about 0.05 and 0.25 inches.

US Pat. No. 9,856,848

QUIESCENT CHAMBER HOT GAS IGNITER

Woodward, Inc., Fort Col...

1. An igniter plug for an internal combustion engine, the igniter plug comprising:
a plug body adapted to couple to the internal combustion engine;
an ignition source carried on the plug body;
an inner housing comprising a jet aperture through the inner housing and defining an inner chamber containing the ignition
source;

an outer housing around the inner housing, the outer housing comprising a second jet aperture and defining an outer chamber
containing the inner chamber, where the jet aperture of the inner housing extends between the inner chamber and the outer
chamber and is configured to jet burning air-fuel mixture from the inner chamber into the outer chamber; and

a valve closure in the inner housing and moveable with respect to the jet aperture of the inner housing between sealing the
inner chamber against flow through the jet aperture of the inner housing and allowing flow out of the inner chamber through
the jet aperture of the inner housing, where the valve closure comprises an aperture extending therethrough configured to
communicate fluid into the inner chamber while the valve closure is sealing passage of fluid through the jet aperture of the
inner housing.

US Pat. No. 9,656,306

DIGITAL CLOSED LOOP PROPORTIONAL HYDRAULIC PRESSURE CONTROLLER

Woodward, Inc., Fort Col...

1. A current to pressure converter (CPC), comprising:
a housing defining a control port, a supply port, and a drain port fluidly coupled therethrough;
a digital controller, configured to reduce the effects of thermal drift, enclosed within said housing;
a 3-way rotary valve configured to alternatively couple the control port with the drain port, the supply port, or neither
the drain port or supply port;

a limited angle torque rotary actuator operatively coupled to the digital controller and drivably coupled to the 3-way rotary
valve; and

a pressure transducer in fluid communication with the control port, the pressure transducer providing pressure feedback to
the digital controller; and

wherein the digital controller is configured to control the pressure supplied by the control port in proportion to an input
analog control signal of 4-20 mA; and

wherein the digital controller is configured to periodically impart an anti-silting impulse to the 3-way rotary valve.

US Pat. No. 9,631,645

ROTARY PISTON ACTUATOR ANTI-ROTATION CONFIGURATIONS

Woodward, Inc., Fort Col...

1. A rotary actuator comprising:
a housing comprising an interior boundary that defines a central bore and comprises interior recesses;
a chamber housing assembly disposed in the central bore and comprising an arcuate chamber, the arcuate chamber comprising
a cavity, a fluid port in fluid communication with the cavity, and an open end, an exterior boundary of the chamber housing
assembly comprising exterior recesses, each of the exterior recesses aligned with a respective one of the interior recesses;

pins residing between the interior boundary of the housing and the exterior boundary of the chamber housing assembly, each
of the pins mated to one of the exterior recesses and a corresponding one of the interior recesses to maintain an orientation
of the chamber housing assembly with respect to the housing;

a rotor assembly rotatably journaled in the chamber housing assembly and comprising a rotary output shaft and a rotor arm
extending radially outward from the rotary output shaft; and

an arcuate-shaped piston disposed in the chamber housing assembly for reciprocal movement in the arcuate chamber through the
open end, wherein a seal, the cavity, and the piston define a pressure chamber, and a portion of the piston connects to the
rotor arm.

US Pat. No. 9,989,060

FUEL SYSTEM WITH LIQUID RING PUMP WITH CENTRIFUGAL AIR/FUEL SEPARATOR

Woodward, Inc., Fort Col...

1. A boost pump unit for an aircraft fuel system comprising:a liquid ring pump having an inlet and an outlet;
an air/fuel separator having an inlet and first and second outlet ports, the inlet operably fluidly coupled to the outlet of the liquid ring pump, the air/fuel separator having an arcuate flow path extending from the inlet to the first and second outlet ports, wherein the first outlet port is in fluid communication with a radially outer portion of the arcuate flow path and the second outlet port is in fluid communication with a radially inner portion of the arcuate flow path;
a return line connected directly to the first outlet port and configured to return fuel to the liquid ring pump.

US Pat. No. 9,732,771

HYDRAULIC ROTARY ACTUATOR

Woodward, Inc., Fort Col...

1. A hydraulic rotary actuator comprising:
a stator housing comprising a seamless body having a bore disposed axially therethrough, the bore having:
a first end bore portion having a first diameter;
a second end bore portion having a second diameter; and
at least a middle bore portion disposed between the first end bore portion and the second end bore portion, said middle bore
portion having:

a first semi-cylindrical surface having a third diameter larger than the first diameter;
a second semi-cylindrical surface having a fourth diameter less than the third diameter and larger than at least one of the
first diameter and the second diameter, wherein the second semi-cylindrical surface is disposed inward radially along a portion
of a perimeter of the middle bore;

a first interior end surface between the middle bore portion and the first end bore portion; and
a second interior end surface between said second bore portion and the middle bore portion;
a rotor assembly comprising:
an output shaft;
a first rotary piston member disposed radially about the output shaft, said first rotary piston member having:
a vane,
a portion adapted to connect to the output shaft when the first rotary piston member is disposed radially about the output
shaft,

a first peripheral longitudinal face,
a second peripheral longitudinal face, said second peripheral longitudinal face positioned axially on the vane,
a first peripheral lateral face,
a second peripheral lateral face, and
a first continuous seal disposed on the first and second peripheral longitudinal faces and the first and second peripheral
lateral faces of the first rotary piston member; and

a second rotary piston member disposed radially about the output shaft, said second rotary piston member having:
a vane,
a portion adapted to connect to the output shaft when the second rotary piston member is disposed radially about the output
shaft,

a third peripheral longitudinal face,
a fourth peripheral longitudinal face, said fourth peripheral longitudinal face positioned axially on the vane,
a third peripheral lateral face,
a fourth peripheral lateral face, and
a second continuous seal disposed on the third and fourth peripheral longitudinal faces and the third and fourth peripheral
lateral faces of the second rotary piston member;

wherein when the rotor assembly is assembled and rotated in the bore of the stator housing, a portion of the first continuous
seal positioned on the first peripheral longitudinal face contacts the second semi-cylindrical surface of the middle bore
portion, a portion of the first continuous seal positioned on the second peripheral longitudinal face contacts the first semi-cylindrical
surface of the middle bore portion, a portion of the first continuous seal positioned on the first peripheral lateral face
contacts the first interior end surface, and a portion of the first continuous seal positioned on the second peripheral face
contacts the second interior end surface.

US Pat. No. 9,541,208

CRYOGENIC CHECK VALVE

Woodward, Inc., Fort Col...

1. A check valve comprising:
a valve body having a bore having a longitudinal axis and a seat along the bore, a fluid inlet at a first longitudinal end
of the bore, and a fluid outlet a second longitudinal end of the bore;

a stopper selectively movable along the bore to contact the seat, the bore being occluded when the stopper is in contact with
the seat;

a first bias member on a first longitudinal side of the stopper within the bore, the first bias member providing a first bias
force upon the stopper in a first longitudinal direction; and

a second bias member on a second longitudinal side of the stopper within the bore, the second longitudinal side being opposite
the first longitudinal side, the second bias member providing a thermally variable second bias force upon the stopper in a
second longitudinal direction opposite the first longitudinal direction, the second bias member comprising a thermally sensitive
shape memory material, the thermally variable bias force being less than the first bias force at temperatures below about
?50° C. and equal to or greater than the first bias force at temperatures at or above about ?50° C.

US Pat. No. 9,334,840

SERIES PLUS PARALLEL METERING PRESSURE REGULATION SYSTEM FOR A THERMAL EFFICIENT FUEL METERING SYSTEM

Woodward, Inc., Fort Col...

1. An engine fuel system, comprising:
a supply arrangement including at least one pump for providing an outlet flow of fuel;
a bypass metering system in fluid communication with the supply arrangement and including a fuel metering valve and a bypass
regulator in fluid communication with an inlet of the fuel metering valve and an inlet of the at least one pump, the bypass
regulator operable to bypass at least a portion of the outlet flow of fuel from the at least one pump back to the inlet of
the at least one pump;

a parallel metering system including a primary regulated circuit and at least two secondary metering circuits arranged in
parallel with the primary regulated circuit, the parallel metering system in fluid communication with the bypass metering
system such that it receives a metered flow of fuel from the fuel metering valve of the bypass metering system, wherein each
of the at least two secondary metering circuits includes a throttling valve; and

wherein the primary regulated circuit includes a primary pressure regulator that is operably connected to the primary regulated
circuit and the at least two secondary metering circuits to detect a pressure in the primary regulated circuit and a pressure
downstream from the throttling valve of each of the at least two secondary metering circuits.

US Pat. No. 10,054,079

THRUST REVERSER ACTUATING

Woodward, Inc., Fort Col...

1. An engine assembly, comprising:a nacelle configured to at least partially surround a turbine engine;
a thrust reverser coupled to the nacelle, the thrust reverser comprising:
a thrust-reversing element movable relative to the nacelle between a stowed position and a deployed position;
at least one hydraulic actuator operably coupled to move the thrust-reversing element between the stowed position and the deployed position;
at least one hydraulic primary lock configured to transition, in response to a first activation pressure, between an engaged state, where movement of the thrust-reversing element is inhibited, and a released state, where movement of the thrust-reversing element is uninhibited; and
a directional control unit fluidly coupled to the at least one hydraulic actuator and the at least one hydraulic primary lock, the directional control unit configured to transition from a first stage to a second stage in response to a second activation pressure that is greater than the first activation pressure, and where a transition from the first stage to the second stage by the directional control unit causes the at least one hydraulic actuator to move the thrust-reversing element to the deployed position.

US Pat. No. 9,890,689

GASEOUS FUEL COMBUSTION

Woodward, Inc., Fort Col...

1. A method of combusting gaseous fuel in a combustion chamber of an internal combustion engine, the method comprising:
injecting, in a first injection, gaseous fuel into the internal combustion engine to mix with air in the combustion chamber,
the internal combustion engine comprising a pre-combustion chamber having a jet aperture in fluid communication between the
pre-combustion chamber and the combustion chamber;

after the first injection, igniting, in the pre-combustion chamber, mixed gaseous fuel and air ingested into the pre-combustion
chamber from the combustion chamber; and

after the igniting, injecting, in a second injection, gaseous fuel into the pre-combustion chamber and expelling, with the
second injection, ignited gaseous fuel and air from the pre-combustion chamber through the jet aperture and into the combustion
chamber as a flaming jet with a core of gaseous fuel.

US Pat. No. 9,705,423

CONTROLLED BOOTSTRAP DRIVER FOR HIGH SIDE ELECTRONIC SWITCHING DEVICE

Woodward, Inc., Fort Col...

1. A circuit comprising:
a phase circuit comprising:
an output port; and
a high side circuit comprising:
a first input port;
a high side switching device configured to receive power from a high side power bus and switch power to the output port based
on a first input signal received at the first input port;

a voltage regulating device having a regulator input port; and
a bootstrap capacitor coupled between the voltage regulating device and the output port;
wherein the voltage regulating device is configured to receive power from the high side power bus and controllably supply
power to the bootstrap capacitor based on a regulator input voltage received at the regulator input port, the regulator input
voltage based on a voltage difference between a voltage present on the output port and a voltage present on the high side
power bus.

US Pat. No. 9,695,831

DETECTION AND COUNTING OF SURGE CYCLES IN A COMPRESSOR

Woodward, Inc., Fort Col...

1. A method for detecting a compressor surge cycle of a compressor, comprising:
receiving, at a surge detector and from one or more feedback devices, one or more measurement signals of a compressor;
determining, by the surge detector, one or more surge value parameters based on the one or more measurement signals;
selecting, by the surge detector, a first value from a selected surge value parameter of the one or more surge value parameters;
determining, by the surge detector, a moving average value for the selected surge value parameter;
determining, by the surge detector, a rate of change value for the selected surge value parameter;
identifying, by the surge detector, a first phase of a surge cycle based on determining that the rate of change value exceeds
a threshold rate change value;

memorializing, by the surge detector, the first value, the moving average value, and a first time index value;
determining, by the surge detector, a second value of the selected surge value parameter;
identifying, by the surge detector, a second phase of the surge cycle based on the identification of the first phase and at
least one of (1) determining, by the surge detector, that a first difference between the second value and the first value
is at least equal to a first threshold difference value, and (2) determining, by the surge detector, that a second difference
between the second value and the moving average value is at least equal to a second threshold difference value;

determining, by the surge detector, a third value of the selected surge value parameter;
identifying, by the surge detector, a third phase of the surge cycle based on the identification of the second phase and at
least one of (1) determining, by the surge detector, that a third difference between the third value and the first value is
less than the first difference, and that a fourth difference between the first difference and the third difference is at most
equal to a third threshold difference value, and (2) determining, by the surge detector, that a fifth difference between the
third value and the moving average value is less than the second difference, and that a sixth difference between the second
difference and the fifth difference is at most equal to a fourth threshold difference value;

providing, by the surge detector and in response to the identification of the third phase, an indication that one or more
compressor surge cycles have occurred; and

activating, based on the indication, a safeguard operation for the compressor.

US Pat. No. 9,574,499

COMBINED BUTTERFLY/BALL VALVE

Woodward, Inc., Fort Col...

1. A valve comprising:
a housing, the housing having an inlet, a primary outlet, and a secondary outlet;
a hybrid valve member rotatably positioned within the housing, the hybrid valve member having a fully closed position wherein
the hybrid valve member prevents flow between the inlet and the primary outlet and prevents flow between the inlet and the
secondary outlet, the hybrid valve member including a planar portion and a hemispherical portion on a first side thereof;

wherein the planar portion faces the inlet in the fully closed position and wherein the hemispherical portion faces the secondary
outlet in the fully closed position;

wherein the hybrid valve member has a second side in an opposed relationship to the first side, wherein the second side includes
a planar portion; and

wherein a seal groove is interposed between the first and second sides.

US Pat. No. 9,890,690

PASSIVE PRECHAMBER DIRECT INJECTION COMBUSTION

Woodward, Inc., Fort Col...

1. A system for igniting a mixture in a main combustion chamber of an internal combustion engine, the system comprising:
a carrier body adapted to couple to the internal combustion engine and comprising:
a prechamber defining an open end configured to receive an igniter and a jet passage, the prechamber adapted to receive fuel
from the main combustion chamber through the jet passage,

a fuel valve receptacle configured to receive a fuel valve and comprising a fuel passageway, and
a tip end defining:
a jet aperture in fluid commination with the jet passage, the jet aperture being configured to ingest a fuel-air mixture from
the main combustion chamber during the compression stroke of the internal combustion engine and expel ignited gaseous fuel
and air from the prechamber through the jet aperture and into the main combustion chamber as a flaming jet after ignition
of the ingested fuel-air mixture by the igniter, and

an injector orifice in fluid communication with the fuel passageway, the injector orifice being configured to inject fuel
into the main combustion chamber from the fuel valve disposed in the fuel valve receptacle and in a trajectory that crosses
the jet aperture.

US Pat. No. 9,695,835

SIDE CHANNEL LIQUID RING PUMP AND IMPELLER FOR SIDE CHANNEL LIQUID RING PUMP

Woodward, Inc., Fort Col...

1. An impeller for a liquid ring pump comprising:
a central hub defining a conical outer surface;
a plurality of angularly spaced apart main vanes extending radially outward from the conical outer surface, and
wherein the conical outer surface of the impeller has a first end having a first radius and a second end having a second radius,
the second radius being greater than the first radius,

a reinforcing ring connecting distal end portions of adjacent main vanes;
wherein the reinforcing ring being axially positioned between a port side of the main vanes and a back side, opposite the
port side of the main vanes of the impeller, and

wherein the impeller is positioned in an impeller cavity of a liquid ring pump housing.

US Pat. No. 9,926,803

TURBINE CONTROL DEVICE PROGNOSTICS

Woodward, Inc., Fort Col...

1. A driver communicatively coupled to a turbine control device and a turbine engine control unit (ECU), the driver comprising a memory, a processor, and instructions stored in the memory and operable when executed by the processor to cause the driver to perform operations comprising:operating the turbine control device by recurrently:
receiving a demand signal from the turbine ECU; and
determining and transmitting a desired position to the turbine control device based on the demand signal; and
during the operating of the turbine control device, tracking a total device travel distance over time by recurrently:
selectively identifying actual device movement based on device position data associated with a displacement sensor monitoring the turbine control device by:
comparing the device position data to a device movement window comprising a predetermined threshold value based on a physical characteristic of the turbine control device; and
determining that the device position is beyond the device movement window; and
accumulating an incremental device travel distance corresponding to the identified actual device movement with the total device travel distance.

US Pat. No. 9,850,917

PUMP AUTHORITY SWITCHING APPARATUS FOR A FLUID DISTRIBUTION SYSTEM

Woodward, Inc., Fort Col...

1. A fluid distribution system comprising:
a boost supply which provides a fluid flow;
a fluid metering system positioned downstream of the boost supply, the fluid metering system configured to supply fluid at
a minimum pressure to a downstream device;

a main fluid pump configured to supply at least a portion of the fluid flow to the fluid metering system, a shut-off valve
positioned upstream of a main fluid pump inlet;

an actuation system positioned downstream of the boost supply, the actuation system configured to supply fluid to one or more
hydraulically-operated devices;

an actuation pump configured to supply at least a portion of the fluid flow to the fluid metering system and to the actuation
system;

a first valve positioned between the actuation pump and the fluid metering system, wherein the first valve and the shut-off
valve are operable to switch between the main fluid pump and the actuation pump as a source of fluid supply to the fluid metering
system;

wherein the shut-off valve is open and the first valve is closed when the main fluid pump is the source of fluid supply to
the fluid metering system, and wherein the shut-off valve is closed and the first valve is open when the actuation pump is
the source of fluid supply to the fluid metering system;

wherein, at any time during a transition from the main fluid pump to the actuation pump as the source of fluid supply, or
from the actuation pump to the main fluid pump as the source of fluid supply, the fluid metering system maintains a stable
fluid flow rate throughout the transition; and

wherein the fuel metering system maintains stable metered flow rate by controlling the initial activation time and flow gain
of the first valve and the shut-off valve.

US Pat. No. 9,843,165

CAP SHIELDED IGNITION SYSTEM

Woodward, Inc., Fort Col...

1. A system for igniting a mixture in a main combustion chamber of an internal combustion engine, the system comprising:
an elongate plug body generally residing around a center longitudinal axis and adapted to couple to the internal combustion
engine;

a first ignition body residing about an end of the plug body;
a second ignition body adjacent the first ignition body to define a flame kernel initiation gap between the second ignition
body and the first ignition body; and

a transversely extending cap at the end of the plug body; and
an enclosure receiving the elongate plug body, the enclosure comprising a jet passage and defining a chamber about the end
of the plug body that encloses the first and second ignition bodies and the cap, the chamber adapted to receive a flow from
the main combustion chamber through the jet passage, and the jet passage comprises a nozzle portion downstream of an entrance
to the jet passage, the nozzle portion configured to direct the flow along a trajectory to the cap.

US Pat. No. 9,841,021

NO CORNER SEAL ROTARY VANE ACTUATOR

Woodward, Inc., Fort Col...

1. A method of assembly of a rotary actuator comprising:
providing a unitary stator housing having a longitudinal bore disposed axially therethrough;
providing a rotor assembly including:
a central longitudinal shaft, and
at least a first longitudinal vane formed integrally with and disposed radially on a central longitudinal shaft, and at least
a second longitudinal vane formed integrally with and disposed radially on the central longitudinal shaft, each of said longitudinal
vanes connected at a first terminal end to a first circular plate formed integrally with the central shaft and at a second
terminal end to a second circular plate formed integrally with the central shaft, each of said vanes having an outer longitudinal
edge, said longitudinal edge parallel to a central axis of the longitudinal shaft, said longitudinal edge spaced a distance
from the central axis substantially equal to an outer radial distance of a circumferential edge of each of the first and second
circular plates;

a first continuous seal groove disposed in the outer longitudinal edge of the first vane and the outer longitudinal edge of
the second vane and the circumferential edge of the first plate and the circumferential edge of the second plate;

a continuous rotor seal disposed in the first continuous seal groove;wherein a first cylindrical surface of the central longitudinal shaft, a first inner surface of the first plate and a first
inner surface of the second plate and a first face of the first longitudinal vane and a first face of the second longitudinal
vane define a first interior pocket in the rotor assembly, and
wherein a second cylindrical surface of the central longitudinal shaft, a second inner surface of the first plate and a second
inner surface of the second plate and a second face of the first longitudinal vane and a second face of the second longitudinal
vane define a second interior pocket in the rotor assembly;

providing a stator assembly and assembling the stator assembly to the rotor assembly to form a combination assembly, said
assembling the stator assembly to the rotor assembly comprising:

contacting with a concave interior surface of a first stator element the first cylindrical surface in the first pocket of
the rotor assembly outside of the unitary stator housing;

contacting with a concave interior surface of a second stator element the second cylindrical surface in the second pocket
outside of the unitary stator housing;

after assembling the stator assembly to the rotor assembly outside of the unitary stator housing, inserting the combination
assembly longitudinally into the longitudinal bore of the unitary stator housing;

securing an outer convex surface of the first stator element to a concave inner surface of the longitudinal bore of the unitary
stator housing subsequent to inserting the combination assembly into the longitudinal bore; and

securing an outer convex surface of the second stator element to a concave inner surface of the longitudinal bore of the housing
subsequent to inserting the combination assembly into the longitudinal bore.

US Pat. No. 9,822,708

IGNITER EVENT CONDUCTOR FOR CONDUCTING IGNITER EVENTS FROM A COMBUSTION CHAMBER TO A SENSOR

Woodward, Inc., Fort Col...

1. A system for a gas turbine engine, the system comprising:
an igniter event conductor comprising a first portion adjacent an ignition location of an igniter of the engine and in a combustion
chamber of the engine and a second portion apart from the igniter and outside the combustion chamber, the conductor extending
through a portion of the igniter and adapted to conduct a portion of an igniter event at the igniter along a continuous flowpath
from the first portion of the conductor to the second portion of the conductor;

a sensor coupled to, and residing proximate, the second portion of the conductor to receive and sense the portion of the igniter
event; and

a second igniter event conductor coupled to a second sensor, wherein the first mentioned sensor and the second sensor are
different types of sensors.

US Pat. No. 9,683,739

VARIABLE-AREA FUEL INJECTOR WITH IMPROVED CIRCUMFERENTIAL SPRAY UNIFORMITY

Woodward, Inc., Fort Col...

1. A fuel injector apparatus, comprising:
an injector body having a bore therethrough, the bore defining a fuel manifold;
a variable-area injector arrangement having a pintle with a conical head and a pintle spring operatively connected to the
injector body in such a manner that the spring urges the conical head to seal against a variable-area exit orifice located
at one end of the body to thereby prevent the passage of pressurized fuel through the variable-area exit orifice, and such
that application of pressurized fuel within the injector body causes the pintle to move such that the conical head of the
pintle is moved out of contact with the variable-area exit orifice of the body as a function of the pressure of the pressurized
fuel in the injector body, to thereby provide a corresponding variable area for passage of the pressurized fuel through the
variable-area exit orifice about the conical head of the pintle; and

a fuel swirler positioned within the manifold and configured to create a swirling action in the flow of pressurized fuel within
the fuel manifold, wherein the fuel manifold is upstream of the variable-area exit orifice.

US Pat. No. 9,909,531

ENGINE AND THRUST REVERSER ACTUATION SYSTEM

Woodward HRT, Inc., Vale...

1. A hydraulic lockout apparatus comprising:
a hydraulic actuator configured to be mechanically coupled to at least one movable cowl portion or deflector and configured
to move the at least one movable cowl portion or deflector into and out of a selected position;

a valve hydraulically coupled to the hydraulic actuator and operable to control a flow of hydraulic fluid to the hydraulic
actuator;

a hydraulic lockout mechanically contactable to the valve and movable between an inhibit condition in which mechanical contact
directly between the hydraulic lockout and the valve prevents mechanical movement of the valve and maintains the valve in
a position that prevents the flow of the hydraulic fluid to the hydraulic actuator, and a permit condition in which disconnection
of mechanical contact directly between the hydraulic lockout and the valve permits mechanical movement of the valve to a position
that permits the flow of the hydraulic fluid to the hydraulic actuator;

a lockout actuator located remotely from the hydraulic lockout and having a handle that is moveable between an inhibit configuration
and a permit configuration; and

a moveable cable having a first portion connected to the hydraulic lockout and a second portion connected to the handle and
configured to mechanically actuate the hydraulic lockout to the inhibit condition when the handle is in the inhibit configuration
or to the permit condition when the handle is in the permit configuration without requiring direct manual access to the hydraulic
lockout.

US Pat. No. 9,709,080

VARIABLE COOLING FLOW

Woodward, Inc., Fort Col...

1. A rotary vane actuator comprising:
a stator having at least one vane stop projecting from an inner circumferential surface of a central chamber of the stator,
and a first fluid port and a second fluid port defined in an interior wall of the stator; and

a rotor having at least one vane projecting from a central rotatable longitudinal shaft, said rotor rotatably disposed in
the stator, said vane including a sealing element disposed on a distal end of the vane and said sealing element adapted to
contact the inner circumferential surface of the stator;

wherein said vane is adapted to contact said stop of the stator, and a high pressure chamber is defined by the stator and
a first side of the vane and a low pressure chamber is defined by the stator and a second side of the vane;

wherein said actuator further includes at least a first aperture spaced apart from the first fluid port and the second fluid
port, and said actuator further includes at least a second aperture and spaced apart from the first fluid port and the second
fluid port; and

wherein a fluid flow passage comprising a gap between an outer surface of the stator and a housing of the actuator connects
the first aperture to the second aperture; wherein the fluid flow passage and first and second apertures connect the high
pressure chamber to the low pressure chamber when said vane is proximal to contact with said stop of the stator.

US Pat. No. 10,074,245

FORCE FEEL USING A BRUSHLESS DC MOTOR

Woodward, Inc., Fort Col...

1. A motion control apparatus comprising:a brushless DC motor configured to actuate a mechanical device based on a plurality of phase power signals;
a plurality of first Hall effect sensors configured to provide a plurality of first feedback signals in response to a sensed motor position;
a plurality of second Hall effect sensors configured to provide a plurality of second feedback signals in response to a sensed motor speed;
a controller configured to (A) determine a motor speed and a motor position of the brushless DC motor based on the plurality of feedback signals, and (B) determine an electrical current level based on a collection of operational parameters and feedback signals comprising a position of the mechanical device, the motor speed, and the motor position;
a current controller configured to provide a plurality of electrical phase sequence output signals based on the electrical current level; and
a motor driver configured to provide the plurality of phase power signals based on the plurality of electrical phase sequence output signals.

US Pat. No. 10,030,679

ROTARY PISTON TYPE ACTUATOR

Woodward, Inc., Fort Col...

1. A plural unitarily mounted cylinder type rotary actuator comprising:a first housing defining:
a first arcuate chamber having a first open end; and
a second arcuate chamber having a second open end and oriented in the opposite rotational direction as the first arcuate chamber;
a rotor assembly rotatably journaled in said first housing and comprising a rotary output shaft and a first rotor arm extending radially outward from the rotary output shaft; and
a unitary piston assembly comprising an arcuate-shaped first piston and an arcuate-shaped second piston, disposed in said first housing for reciprocal movement in the first arcuate chamber through the first open end and for reciprocal movement in the second arcuate chamber through the second open end, wherein a first seal, the first cavity, and the first piston define a first pressure chamber, a second seal, the second cavity, and the second piston define a second pressure chamber, and a first portion of the unitary piston assembly contacts the first rotor arm.

US Pat. No. 10,001,764

ADAPTIVE MULTIPLE INPUT MULTIPLE OUTPUT PID CONTROL SYSTEM FOR INDUSTRIAL TURBINES

Woodward, Inc., Fort Col...

1. A method for operating a turbine comprising:receiving, at a ratio controller of the turbine, a first process output value (Sout) of a first actuator controller, the first process output value based on a first process input value (Sin), one or more turbine response values of the turbine, and at least one first control parameter selected from a group comprising a proportional gain value, an integral gain value, and a derivative gain value;
receiving, at the ratio controller, a second process output value (Pout) of a second actuator controller, the second process output value based on a second process input value (Pin), one or more turbine response values of the turbine, and at least one second control parameter selected from the group;
providing, by the ratio controller and to the first actuator controller, the first process input value as a predetermined first constant set point value;
determining, by the first actuator controller, a first process output value based on the first process input value;
varying, by the ratio controller and to the second actuator controller, the second process input value to a plurality of predetermined first varying set point values;
determining, by the second actuator controller, a second process output value based on the second process input value;
operating the turbine based on the first process output value and the second process output value;
receiving, by the second actuator controller and for one or more of the first varying set point values, one or more first updated turbine response values based on operation of the turbine;
determining, by the second actuator controller, at least one third control parameter based on the turbine response values;
providing, by the ratio controller and to the second actuator controller, the second process input value as a predetermined second constant set point value;
determining, by the second actuator controller, a third process output value based on the second process input value, the turbine response values, and the third control parameter;
varying, by the ratio controller and to the first actuator controller, the first process input value to a plurality of predetermined second varying set point values;
determining, by the first actuator controller, a fourth process output value based on the first process input value;
operating the turbine based on the third process output value and the fourth process output value;
receiving, by the first actuator controller and for one or more of the second varying set point values, one or more second updated turbine response values based on operation of the turbine;
determining, by the first actuator controller, at least one fourth control parameter based on the turbine response values; and
operating the turbine based on the third control parameter and the fourth control parameter.

US Pat. No. 9,932,980

GEAR PUMP BEARING DAM

Woodward, Inc., Fort Col...

12. A method for pumping a fluid comprising:providing a gear pump comprising:
a first gear having a first axis, a first gear root diameter, and a plurality of first gear teeth having a gear addendum and a gear set pressure angle;
a second gear having a second axis, a second gear root diameter, and a plurality of second gear teeth having the gear addendum and the gear set pressure angle;
a housing comprising:
a fluid inlet and a fluid discharge;
a first gear bearing and a second gear bearing configured to position the first gear and the second gear along a bearing center line extending between the first axis and the second axis on opposite sides of a bearing split line, the bearing split line extending through a midpoint between the first gear root diameter and the second gear root diameter and extending perpendicular to the bearing center line, the first gear bearing and the second gear bearing configured to position the first gear teeth and second gear teeth in intermeshing contact; and,
a central fluid dam comprising:
a first face arranged at non-perpendicular angle to the bearing split line, spaced apart from the bearing center line at the bearing split line a first distance towards the fluid inlet, formed as a straight edge intersecting the bearing split line and extending from the first gear root diameter away from the bearing center line to the second gear root diameter; and,
a second face arranged approximately perpendicular to the bearing split line, spaced apart from the bearing center line at the bearing split line a second distance towards the fluid outlet, and extending between the first gear root diameter and the second gear root diameter;
providing the fluid at the fluid inlet to a collection of tooth spaces;
driving the first gear;
driving the second gear with the first gear; and
urging the movement of the fluid in the collection of tooth spaces from the fluid inlet to the fluid discharge, wherein backflow of the fluid from the fluid discharge to the fluid inlet is impeded by the central fluid dam.

US Pat. No. 9,915,709

CONTROLLING A MOTOR WITH TWO OR MORE HALL SENSORS

Woodward, Inc., Fort Col...

1. A motor system comprising:
a motor comprising two Hall sensors configured to output binary values, the two Hall sensors being placed 120 electrical degrees
apart; and

a controller configured to control the motor, the controller being operable to:
monitor output signals of the two Hall sensors;
in response to determining that a first Hall sensor of the two Hall sensors outputs a first binary value while a second Hall
sensor of the two Hall sensors outputs a second binary value that is different from the first binary value, determine a third
signal to be alternating from the first binary value to the second binary value, and then from the second binary value to
the first binary value at a frequency no less than a maximum state transition frequency of the motor, wherein the maximum
state transition frequency of the motor is a maximum number of logic state transitions per a time unit of the motor given
a maximum operating speed of the motor; and

control commutation of a drive current into the motor based on the third signal and the outputs of the two Hall sensors, wherein
controlling commutation of a drive current into the motor based on the third signal and the outputs of the two Hall sensors
comprises:

in response to determining that the first Hall sensor of the two Hall sensors outputs the first binary value while the second
Hall sensor of the two Hall sensors outputs the first binary value,

determining the third signal to be the second binary value other than the first binary value; and
controlling the commutation of the drive current into the motor based on the third signal and the outputs of the two Hall
sensors according to a commutation truth table for a motor with Hall sensors separated by 120 electrical degrees; or

in response to determining that the first Hall sensor of the two Hall sensors outputs the first binary value while the second
Hall sensor of the two Hall sensors outputs the first binary value,

determining the third signal to be the first binary value; and
controlling the commutation of the drive current into the motor based on the third signal and the outputs of the two Hall
sensors according to a commutation truth table of a motor with Hall sensors separated by 60 electrical degrees.

US Pat. No. 9,915,241

ROTARY VANE ACTUATOR WITH FLUID ACTUATED MECHANICAL LOCK

Woodward, Inc., Fort Col...

1. A seal assembly for a rotary vane actuator including:
a compressible seal slidably mounted on a central longitudinal shaft of a rotor assembly, the compressible seal having an
outer circumferential surface sized to be received in a bore of a stator housing and configured to be assembled to an end
cap, a first lateral surface adapted for contacting a first end surface of a first stator element, a first end surface of
a second stator element, a first end surface of a first longitudinal vane, and a first end surface of a second longitudinal
vane, and configured to slide axially along the central longitudinal shaft through a central opening sized to receive the
central longitudinal shaft,

a compression member slidably mounted on the central longitudinal shaft and configured to slide axially along the central
longitudinal shaft, wherein the compression member, the end cap, the bore of the stator, the rotor assembly, and the compressible
seal define a fluid chamber,

a locking piston slidably mounted on the central longitudinal shaft, the locking piston having an end surface adapted to contact
the compression member, a circumferential surface sized to be received in the bore of the housing, and a lateral surface axially
opposite from the end surface and adapted to receive actuation fluid, the locking piston being configured to slide axially
along the central longitudinal shaft through the central opening,

a first fluid duct configured to fluidically connect the fluid chamber to the lateral surface,
a lock valve assembly comprising a second fluid duct and configured to control fluid flow along the first fluid duct based
on a fluid pressure provided at the second fluid duct.

US Pat. No. 9,904,301

IN-LINE PRESSURE RELIEF APPARATUS

1. A pressure relief apparatus, the apparatus comprising:
a primary conduit for transporting fluid in a given direction;
a secondary conduit intersecting the primary conduit in a direction having an angle greater than 0 degrees and less than 90
degrees with respect to the opposite direction of the given direction of the transported fluid in the primary conduit; and

a rupture disk disposed in the secondary conduit designed to fail when pressure of the transported fluid in the primary conduit
increases above a desired pressure threshold.

US Pat. No. 9,696,074

CONTROLLING REFRIGERATION COMPRESSION SYSTEMS

Woodward, Inc., Fort Col...

1. A refrigerant compression system comprising:
a compressor system having a plurality of compression stages;
a first suction temperature control circuit associated with a first quench valve operable to provide an adjustable flow of
quench fluid into a first compression stage, the first suction temperature control circuit operable to:

identify a first temperature setpoint and an inlet temperature of the first compression stage; and
determine a first quench flow demand of a quench fluid flow that is injected through the first quench valve into the first
compression stage based on the first temperature setpoint and the inlet temperature of the first compression stage;

a second suction temperature control circuit associated with a second quench valve operable to provide an adjustable flow
of quench fluid into a second compression stage, the second suction temperature control circuit operable to:

identify a second temperature setpoint and an inlet temperature of the second compression stage; and
determine a second quench flow demand of a quench fluid flow that is injected through the second quench valve into the second
compression stage based on the second temperature setpoint and the inlet temperature of the second compression stage;

a discharge temperature control circuit for controlling a discharge temperature at an outlet of the plurality of compression
stages, the discharge temperature control circuit operable to:

receive information regarding the discharge temperature at the outlet of the plurality of compression stages and a discharge
temperature setpoint; and

determine a third quench flow demand of the quench fluid flow that is injected through the first quench valve into the first
compression stage and a fourth quench flow demand of the quench fluid flow that is injected through the second quench valve
into the second compression stage such that the discharge temperature at the outlet of the plurality of compression stages
is maintained at or below the discharge temperature setpoint; and

a first quench valve controller associated with the first quench valve, the first quench valve controller operable to:
receive the first quench flow demand determined by the first suction temperature control circuit;
receive the third quench flow demand determined by the discharge temperature control circuit; and
determine a valve position demand of the first quench valve based on the first quench flow demand and the third quench flow
demand; and

a second quench valve controller associated with the second quench valve, the second quench valve controller operable to:
receive the second quench flow demand determined by the second suction temperature control circuit;
receive the fourth quench flow demand determined by the discharge temperature control circuit; and
determine a valve position demand of the second quench valve based on the second quench flow demand and the fourth quench
flow demand.

US Pat. No. 10,288,007

THRUST REVERSER FLOW LIMITING VALVE

Woodward, Inc., Fort Col...

1. A two-speed thrust reverser actuation system comprising:a thrust reverser element configured to move between a stowed position and a deployed position during normal use in association with a jet engine, and arranged to experience an assisting load during movement of the thrust reverser element from the stowed position towards the deployed position,
an isolation valve configured to supply hydraulic fluid under pressure;
a hydraulic actuator configured to move the thrust reverser element between the stowed and deployed positions, the hydraulic actuator comprising:
a deploy port through which hydraulic fluid under pressure from the isolation valve is admitted to a first side of the actuator during operation of the actuator in a thrust reverser element deploy mode to displace the thrust reverser element from its stowed position to the deployed position, and
a stow port though which hydraulic fluid is displaced from a second side of the actuator during operation in the deploy mode; and
a directional control valve comprising a regeneration feature through which hydraulic fluid displaced from the second side of the actuator is returned to the first side of the actuator in addition to the hydraulic fluid supplied from the isolation valve during operating in the deploy mode, the regeneration feature comprising:
a restrictor, and
a velocity fuse arranged in parallel with the restrictor and configured to close when a flow rate of hydraulic fluid through the velocity fuse in a first direction exceeds a threshold value.

US Pat. No. 10,118,688

INHERENTLY BALANCED CONTROL STICK

Woodward, Inc., Fort Col...

1. A control apparatus comprising:a first mounting member;
an elongate member comprising:
a first elongate portion configured as a first lever arm having a first mass;
a second elongate portion comprising a first feedback assembly having a first interface device, and configured as a second lever arm having a second mass; and
a first axis member between the first elongate portion and the second elongate portion, pivotally mounting the elongate member to the first mounting member and defining a first axis between the first lever arm and the second lever arm; and
a track configured as an arc defined about the first axis wherein the first interface device is configured to travel along the track in response to movement of the second elongate portion partly about the first axis;
wherein the first elongate portion and the second elongate portion are substantially balanced across the first axis, the first mass substantially offsets the second mass across the first axis member, and the mass of the first elongate portion is arranged to create, when exposed to acceleration forces, a first torque about the first axis that substantially neutralizes a second torque created about the first axis when the second elongate portion and the first feedback assembly is exposed to the acceleration forces.

US Pat. No. 10,119,478

HIGH RELIABILITY HIGH FLOW REDUNDANT TRIP BLOCK

Woodward, Inc., Fort Col...

1. A trip block, comprising:a housing having an inlet, an outlet, and a plurality of interconnected passageways;
a plurality of valve assemblies, wherein a portion of each valve assembly is housed within the housing, wherein each valve assembly of the plurality of valve assemblies includes a rotary valve member arrangement and an actuator for actuating the rotary valve member arrangement;
wherein each one of the plurality of valve assemblies is arranged within the housing to govern a flow of fluid between the inlet and the outlet;
wherein the rotary valve member arrangement of each one of the plurality of valve assemblies includes a spool rotatably disposed within a sleeve;
wherein the spool includes a shaft and at least one valve member mounted to the shaft
wherein the at least one valve member is cup-shaped and includes a plurality of ports extending through a sidewall of the at least one valve member;
wherein an interior surface of the sidewall of the at least one valve member includes a continuous groove which extends across each one of the plurality of ports such that the side wall has a reduced cross sectional thickness in an area of each port.

US Pat. No. 10,012,155

COMBUSTION PRESSURE FEEDBACK BASED ENGINE CONTROL WITH VARIABLE RESOLUTION SAMPLING WINDOWS

Woodward, Inc., Fort Col...

1. A method of controlling a dual fuel internal combustion engine, the method comprising:sampling a crank angle sensor of the engine;
sampling a pressure sensor of each cylinder of the engine at a first frequency during a first range of cylinder crank angles, the first range of cylinder crank angles including the ignition position of the cylinder and at least a portion of a combustion period of the cylinder;
sampling the pressure sensor at a second frequency during a second range of cylinder crank angles, the second frequency being lower than the first frequency;
calculating combustion metrics including IMEP, an adiabatic heat release rate of combustion in the cylinder, and combustion phasing based on the sampled crank angle and pressure;
receiving an indicated mean effective pressure (IMEP) target and a combustion phasing target;
determining a combustion phasing trigger and a substitution rate between a first fuel and a second fuel as a function of the calculated adiabatic heat release rate of combustion in the cylinder;
adjusting the combustion phasing trigger based on the calculated combustion phasing to meet the combustion phasing target;
adjusting the fuel substitution rate based on the calculated IMEP to meet the IMEP target; and
controlling the engine based on the adjusted combustion phasing trigger and fuel substitution rate.

US Pat. No. 9,933,058

REDUNDANT EXTENSION LINEAR ACTUATOR AND METHODS OF USE

WOODWARD, INC., Fort Col...

1. An actuator comprising:a linear housing;
an exterior slider output at least partially disposed within the linear housing, the exterior slider output slidable in a first direction out of the linear housing to an extended position, and the exterior slider output slidable in a second direction into the linear housing to a retracted position;
a primary linear module comprising:
a primary power drive;
a primary power screw rotatable by the primary power drive; and
a primary nut operable to translate rotation of the primary power screw to linear motion of the primary nut across the primary power screw, the primary nut operable to move the exterior slider output to:
the extended position if the primary power screw is rotated in a first primary power screw direction, and
the retracted position if the primary power screw is rotated in a second primary power screw direction, opposite the first primary power screw direction; and
a secondary linear module comprising:
a secondary power drive;
a torque shaft rotatable by the secondary power drive;
a secondary power screw having a first end and a second end, the first end slidably coupled to the torque shaft and the second end coupled to the exterior slider output, the secondary power screw rotatable by the torque shaft; and
a secondary nut coupled to the secondary power screw, the secondary power screw operable to slide linearly across the torque shaft by rotating through the secondary nut, the secondary power screw operable to move the exterior slider output to:
the extended position if the secondary power screw is rotated in a first secondary power screw direction, and
the retracted position if the secondary power screw is rotated in a second secondary power screw direction, opposite the first secondary power screw direction.

US Pat. No. 9,933,088

ROTARY ACTUATED VALVE WITH POSITION INDICATOR

Woodward, Inc., Fort Col...

1. A positioning device comprising:an actuator assembly coupled to a first axial end of an output shaft and configured to actuate the output shaft based on an input signal;
a position sensor assembly comprising:
a position sensor configured to detect a positional configuration of a second axial end of an input shaft proximal the first axial end and not directly coupled to the output shaft;
a first input receiver configured to receive the input signal;
a first output transmitter configured to provide a first output signal based on the positional configuration of the input shaft; and
a second output transmitter configured to provide a second output signal indicative of a failure of at least one of the input shaft and the output shaft based on a comparison of the input signal and the positional configuration;
a moveable member coupled to both the output shaft, at a third axial end opposite the first axial end, and the input shaft, at a fourth axial end opposite the second axial end, and spaced apart from both the actuator assembly and the position sensor, the moveable member being configured to alter the positional configuration of the input shaft and being configured to be actuated by the output shaft.

US Pat. No. 9,759,232

ROTARY ACTUATOR WITH INTEGRATED ACTUATION

Woodward, Inc., Fort Col...

1. A rotary actuator for actuating the variable stator vanes of a compressor section of a turbine engine, the rotary actuator
comprising:
a stator assembly centered along a longitudinal axis of the rotary actuator;
a rotor assembly surrounding the stator assembly; the rotor assembly rotatable about the longitudinal axis relative to the
stator assembly;

first and second bearing assemblies mounted at adjacent opposed axial ends of the stator assembly and connected between the
stator assembly and rotor assembly to allow for the rotation of the rotor assembly about the longitudinal axis relative to
the stator assembly; and

a hydraulic actuation arrangement formed between the rotor assembly and the stator assembly, the hydraulic actuation arrangement
including at least one first pressure chamber and at least one second pressure chamber, an at least one rotor vane of the
rotor assembly located between the at least one first pressure chamber and the at least one second pressure chamber, the at
least one first pressure chamber operable to receive a hydraulic fluid at a first pressure, the at least one second pressure
chamber operable to receive a hydraulic fluid at a second pressure different than the first to create a pressure differential
between the at least one first and second pressure chambers operable to rotate the at least one rotor vane and the rotor assembly
about the longitudinal axis;

further comprising an inlet manifold, the inlet manifold having a first inlet and a second inlet, and wherein the stator assembly
includes an internal cavity defining a first inlet chamber and a second inlet chamber, the first inlet chamber in fluid communication
with the first inlet, the second inlet chamber in fluid communication with the second inlet.

US Pat. No. 10,253,480

MULTI-CHAMBER ROTARY PISTON ACTUATOR

Woodward, Inc., Fort Col...

1. A fluid actuator comprising:a housing comprising a first chamber wall defining an arcuate first chamber, a first fluid port in fluid communication with the arcuate first chamber, and a first open end;
a first piston assembly comprising an arcuate-shaped tubular first piston comprising a second chamber wall defining an arcuate second chamber, a second fluid port in fluid communication with the arcuate second chamber, a enclosed end, and a second open end, disposed in said housing for reciprocal movement in the first chamber through the first open end relative to the housing, wherein a first seal, the first chamber wall, and the first piston define a first pressure chamber; and
a second piston assembly comprising an arcuate-shaped second piston disposed in said first piston assembly for reciprocal movement in the second chamber through the second open end relative to the housing, wherein a second seal, the second chamber wall, and the second piston define a second pressure chamber, and a first portion of the second piston contacts a first end effector.

US Pat. No. 10,288,090

LOCKING ROTARY ACTUATOR

Woodward, Inc., Fort Col...

1. A locking apparatus for a rotary actuator, comprising:an outer housing comprising a cylindrical interior surface having a radial recess having at least one circumferential end formed therein;
a rotor disposed within the outer housing and comprising an axial interior cavity and a port disposed to be capable of rotational alignment with the radial recess;
a piston disposed for axially reciprocal movement within the axial interior cavity between a first position and a second position; and,
a key disposed for radially reciprocal movement within the port.

US Pat. No. 10,126,762

VELOCITY AND PRESSURE EQUALIZATION PORTS

Woodward, Inc., Fort Col...

1. A fluid flow valve, comprising:a valve piston;
a first annulus, the first annulus disposed on a first end of the valve piston and having an inlet;
a first valve sleeve, the first valve sleeve containing a first plurality of ports spanning a first distance around a periphery of the first valve sleeve and a second plurality of ports spanning a second distance around the periphery of the first valve sleeve, the first plurality of ports and the second plurality of ports providing fluid communication to the valve piston;
wherein a first space having no ports separates the first plurality of ports from the second plurality of ports;
wherein the first space is in line with the inlet of the first annulus; and
wherein the first annulus further comprises an outlet, wherein a second space having no ports separates the first plurality of ports and the second plurality of ports, and wherein the second space is in line with the outlet of the first annulus.

US Pat. No. 10,047,730

HIGH-TEMPERATURE THERMAL ACTUATOR UTILIZING PHASE CHANGE MATERIAL

Woodward, Inc., Fort Col...

1. A high-temperature thermal actuator comprising:a sealed volumetric confine comprising:
a flexible metal wall with surfaces orthogonal to an axial orientation that allows flexural displacement towards the outside of said confine;
an opposing wall with surfaces orthogonal to an axial orientation, approximately parallel to, and offset by a distance from, said flexible wall;
at least one non-flexible wall that remains substantially rigid under operational circumstances, and that is disposed in a circumferential orientation to engage said flexible metal wall and said opposing wall thereby forming said sealed confine;
a phase change media located within wherein said volume of said confine, said phase change media expands upon a change of state from solid to liquid as the temperature of said phase change media increases beyond 200° C., wherein said phase change media does not substantially change volume due to expansion from temperature prior to said change of state from solid to liquid; and,
an actuator rod in contact with an outside surface of said flexible metal wall;
wherein said actuator rod undergoes actuation displacement by being displaced when said flexible wall changes distance from said opposing wall in response to said change of state of said phase change media.

US Pat. No. 10,006,637

COMBUSTOR WITH STAGED, AXIALLY OFFSET COMBUSTION

Woodward, Inc., Fort Col...

1. A method, comprising:supplying air without fuel at an outlet of a first fuel/air mixer assembly in a gas turbine combustor assembly; and
concurrently, burning a fuel and air mixture at an outlet of a second, adjacent fuel/air mixer assembly in the gas turbine combustor assembly, the second mixer assembly having an outlet in a second plane that is offset in the direction of a longitudinal axis of the gas turbine combustor assembly relative to a first plane of the outlet of the first fuel/air mixer assembly.

US Pat. No. 9,893,497

CONTROLLED SPARK IGNITED FLAME KERNEL FLOW

Woodward, Inc., Fort Col...

1. An igniter for an engine, comprising:
a central electrode;
a velocity control tube arranged around the central electrode and extending beyond an end of the central electrode toward
a combustion chamber end of the spark plug, the velocity control tube comprising a ground electrode;

an enclosure of the igniter containing the central electrode and the velocity control tube;
an ignition location between the central electrode and the ground electrode; and
the velocity control tube defining a passage that includes the ignition location and during operation of the engine receives
a flow from outside of the enclosure and directs the flow to the ignition location predominantly away from a combustion chamber
end of the enclosure, the velocity control tube adapted to produce a peak flow velocity at the ignition location that is at
least 10% of the peak flow velocity of the flow into the enclosure.

US Pat. No. 10,054,102

QUIESCENT CHAMBER HOT GAS IGNITER

Woodward, Inc., Fort Col...

1. A method of igniting an air-fuel mixture in an internal combustion engine, the method comprising:feeding a first portion of air-fuel mixture from a main combustion chamber of the internal combustion engine into an inner housing of a pre-chamber chamber of the internal combustion engine through an aperture extending through a valve closure in the pre-chamber, the valve closure sealing a jet aperture between the inner housing and an outer housing of the pre-chamber;
igniting the first portion of air-fuel mixture in the inner housing;
retaining the ignited first portion of air-fuel mixture in the inner housing with the sealed jet aperture;
moving the valve closure with respect to the jet aperture to open the jet aperture, the open jet aperture releasing the ignited first portion of air-fuel mixture from the inner housing into the outer housing;
igniting a second portion of air-fuel mixture in the outer housing with the ignited first portion of air-fuel mixture from the inner housing; and
igniting a third portion of air-fuel mixture in the main combustion chamber with the ignited second portion of air-fuel mixture from within the outer housing.

US Pat. No. 10,561,039

FRAME FOR PRINTED CIRCUIT BOARD SUPPORT IN HIGH VIBRATION

Woodward, Inc., Fort Col...

1. A frame for dampening vibrations in a printed circuit board (PCB) assembly, the frame comprising:a substrate having a first surface and a second surface; and
a plurality of ridges extending from at least one of the first and second surfaces, the plurality of ridges defining one or more recesses and the plurality of ridges configured to mount to a PCB;
wherein at least one of the one or more recesses is configured to accommodate one or more electronic components of the PCB in the PCB assembly,
wherein the plurality of ridges extend from both of the first and second surfaces.

US Pat. No. 10,199,912

TORQUE MOTOR WITH MECHANICAL FLEXURES ESTABLISHING ARMATURE-TO-FIELD GAPS

Woodward HRT, Inc., Sant...

1. A torque motor comprising:a mechanical reference member;
an armature flexibly mounted to the mechanical reference member for rotation about a motor axis; and
a field assembly including field pole pieces defining a pole opening into which the armature extends with respective gaps to the respective field pole pieces, the field assembly being spaced from the mechanical reference member by a set of deformable flexures, the flexures being deformed sufficiently to locate the pole opening at a predetermined position relative to the armature with corresponding predetermined lengths of the gaps, the field assembly being urged into contact with the deformable flexures and secured to the mechanical reference member by one or more fasteners.

US Pat. No. 10,175,703

DIGITAL CLOSED LOOP PROPORTIONAL HYDRAULIC PRESSURE CONTROLLER

Woodward, Inc., Fort Col...

1. A method comprising the steps of:providing at least two current-to-pressure converters (CPCs) in a positioning control system for valves and actuators;
configuring one of the at least two CPCs as a master CPC, and configuring another of the at least two CPCs as a slave CPC, wherein the master CPC controls a hydraulic pressure within the positioning control system;
linking the master CPC and slave CPC such that the master CPC knows an operational status of the slave CPC, and the slave CPC knows an operational status of the master CPC; and
the slave CPC taking control of the hydraulic pressure within the positioning control system when operational status of the master CPC indicates failure of the master CPC.

US Pat. No. 10,024,450

HIGH SPEED SHUTDOWN DEVICE FOR ELECTRIC ACTUATOR

Woodward, Inc., Fort Col...

1. A high speed shutdown device for an electric actuator, comprising:an electric motor;
a lead screw drivably coupled to the electric motor;
a lead screw nut threadably coupled to the lead screw;
a drive body operably coupled to the lead screw nut and configured to linearly translate in conjunction with the lead screw nut but not to rotate in conjunction with the lead screw nut;
a brake operatively coupled between the drive body and the lead screw nut such that the brake enables and prevents rotation of the lead screw nut;
an output shaft drivably coupled to the drive body; and
a return spring in contact with one of the output shaft or the drive body and configured to apply a return force on one of the output shaft or drive body to position the output shaft in a failsafe position;
wherein the lead screw nut is allowed to rotate when the brake does not apply a braking force;
wherein the lead screw nut is allowed to linearly translate along the lead screw under operation of the return force from the return spring when the lead screw is not being rotated by the electric motor in order to return the output shaft to the failsafe position; and
further comprising a soft stop spring positioned to engage one of the drive body or output shaft to slow its linear translation over-travel beyond the return of the output shaft to the failsafe position.

US Pat. No. 10,324,484

ADAPTIVE PID CONTROL SYSTEM FOR INDUSTRIAL TURBINES

Woodward, Inc., Fort Col...

15. A system comprising:a process controller configured to perform a control algorithm based on at least an integral gain (I) value, an input value and a first derivative gain (D) value;
a parameter controller comprising a programmable processor configured to perform a parameter adjustment algorithm tangibly embodied in a machine-readable storage device and based on at least a speed derivative ratio (SDR);
wherein the parameter adjustment algorithm is configured to perform operations comprising:
controlling, by the process controller, the process based on at least the first derivative gain (D) value, the integral gain (I) value, and the input value;
receiving, by the parameter controller, a process response value provided by a process output sensor;
determining, by the parameter controller, an updated derivative gain (D) value based on at least the process response value, an integral gain (I) value, the speed derivative ratio (SDR), and the parameter adjustment algorithm;
providing, to the process controller from the parameter controller, the updated derivative gain (D); and
controlling, by the process controller, the process based on at least the updated derivative gain (D) value, the integral gain (I) value, and the input value.

US Pat. No. 10,294,866

PARALLEL METERING PRESSURE REGULATION SYSTEM WITH INTEGRATED FLOW METER PLACEMENT

Woodward, Inc., Fort Col...

1. A parallel metering pressure regulation system for supplying metered fuel flow to a turbine engine, the system comprising:a supply arrangement configured for providing an output flow of fuel at an output pressure;
a minimum pressurizing valve in fluid communication with the supply arrangement and a primary pressure regulator in fluid communication with the minimum pressurizing valve;
a parallel metering arrangement including a plurality of metering circuits arranged in parallel; and
the supply arrangement further comprising a flow meter interposed between the supply arrangement and the parallel metering arrangement to measure the output flow of fuel provided from the supply arrangement to the parallel metering arrangement.

US Pat. No. 10,277,217

CONTROLLED BOOTSTRAP DRIVER FOR HIGH SIDE ELECTRONIC SWITCHING DEVICE

Woodward, Inc., Fort Col...

1. A circuit comprising:a phase circuit comprising:
an output port; and
a high side circuit comprising:
a first input port;
a first switching device configured to receive first power from a first power bus and switch first power to the output port as a high-power signal based on a first low-power input signal received at the first input port;
a second switching device;
a bootstrap recharging line configured to receive first power from the second switching device and receive bootstrap power from a bootstrap power bus; and
a bootstrap capacitor coupled between the bootstrap power bus and the output port;
wherein the second switching device is configured to receive boosted power from the first power bus, boosted by a voltage source, and switch boosted power to the bootstrap recharging line based on a second low-power input signal received at a second input port.

US Pat. No. 10,232,412

FLEXIBLE PARTS FIXTURING FOR AUTOMATED PARTS WASHING

Woodward, Inc., Fort Col...

1. A parts holder assembly comprising:a basket comprising:
a substantially non-compliant basket floor having a plurality of openings therethrough;
a mesh layer, adjacent to the basket floor; and
one or more posts each attached to the basket floor at a proximal post end and extending away from the basket floor at a distal post end;
a retaining device comprising:
a frame having a frame outer width, a frame outer length, a frame inner width less than the frame outer width, a frame inner length less than the frame outer length, the frame inner length and the frame inner width defining an open interior frame space;
one or more mounting devices, each of the mounting devices being adapted to constrain the frame at a selected position away from the basket floor and the mesh layer along a length of a corresponding one of the posts between the proximal post end and the selected position; and
a web having at least one outer edge attached to the frame and a plurality of compliant elastic cords extending across the open interior frame space.

US Pat. No. 10,234,496

DETECTION OF VALVE OPEN TIME FOR SOLENOID OPERATED FUEL INJECTORS

Woodward, Inc., Fort Col...

1. A method for determining actuator actuation time, comprising:evaluating an analog electrical current waveform;
determining a Boolean waveform based on the evaluated analog electrical current waveform;
determining a collection of one or more first durations based on one or more on times identified from the Boolean waveform;
determining a collection of one or more second durations based on one or more off times identified from the Boolean waveform;
comparing ones of the collection of first durations with timewise corresponding ones of the collection of second durations to identify a minimum difference value;
identifying a timewise location of the minimum difference value;
determining, based on the comparing, an event based on the identified timewise location;
identifying a time at which the event occurred; and
providing the time as a completion time.

US Pat. No. 10,511,152

METHOD AND SYSTEM FOR A UNIQUE MATERIAL AND GEOMETRY IN A HIGH TEMPERATURE SPARK PLUG EXTENDER

Woodward, Inc., Fort Col...

1. A system for engine ignition, the system comprising:a spark plug extender for coupling a voltage to a spark plug, the spark plug extender comprising a conductive core encased in a liquid crystal polymer with opposite ends of said conductive core not encased in said liquid crystal polymer, wherein the voltage delivered to the spark plug increases as temperature of the spark plug extender increases above 120 degrees C.

US Pat. No. 10,487,856

HIGH-FLOW ELECTRO-HYDRAULIC ACTUATOR

Woodward, Inc., Fort Col...

1. A valve assembly comprising:a housing including at least one port; and
a rotary valve disposed within the housing, the rotary valve comprising:
an outer sleeve with at least one port aligned with the at least one port of the housing;
a spool rotationally disposed within the sleeve, the spool including a shaft and at least one valve element disposed along the shaft, the at least one valve element including at least one port formed thereon;
a first and a second anti-friction element supporting opposing ends of the shaft of the spool;
a rotary electric actuating device coupled to an end of the shaft, the rotary electric actuating device operable to rotate the spool to selectively align the at least one port of the spool with the at least one port of the sleeve; and
wherein the sleeve incorporates a radially-outwardly-directed contoured spot face lead-in area adjacent the at least one port of the sleeve, and wherein the at least one valve element includes a radially-inwardly-directed contoured spot face lead-in area adjacent the at least one port thereof, wherein the radially-outwardly directed contoured spot face lead-in area and the radially-inwardly-directed contoured spot face lead-in area face away from one another when the at least one port of the spool and the at least one port of the sleeve are aligned.

US Pat. No. 10,384,428

POLYURETHANE ROLL COVER FOR CALENDER ROLL FOR PAPERMAKING MACHINE

Stowe Woodward Licensco L...

1. A calender roll for a papermaking machine, comprising:a substantially cylindrical core; and
a cover circumferentially surrounding the core, the cover comprising:
a base layer circumferentially overlying the core; and
a topstock layer comprising polyurethane circumferentially overlying the base layer, the topstock layer being fiber-reinforced, the polyurethane having a glass transition temperature of between about 120 and 150° C., the topstock layer having a hardness of 70 to 90 ShD, wherein the polyurethane is prepared from a mixture comprising an isocyanate, a catalyst and a hardener; and wherein the isocyanate is included at a weight percent of between about 70 and 85 percent, and the catalyst is included at a weight percent of between about 10 and 20 percent.

US Pat. No. 10,260,377

GENERATING STEAM TURBINE PERFORMANCE MAPS

Woodward, Inc., Fort Col...

1. A steam turbine system comprising:a high-pressure turbine section;
a low-pressure turbine section;
a high-pressure control valve operable to provide an adjustable flow of steam into the high-pressure turbine section;
a low-pressure control valve operable to provide an adjustable flow of steam into the low-pressure turbine section;
a controller associated with the high-pressure control valve and the low-pressure control valve, the controller programmed to, during operation of the steam turbine system:
change a pressure or flow demand of the steam turbine system;
in response to the change of the pressure or flow demand of the steam turbine system, measure a response to the change of the pressure or flow demand of the steam turbine system;
change a speed or load demand of the steam turbine system;
in response to the change of the speed or load demand of the steam turbine system, measure a response to the change of the speed or load demand of the steam turbine system;
wherein the response to the change of the pressure or flow demand of the steam turbine system and the response to the change of the speed or load demand of the steam turbine system comprises measurements of three or more different operating points of the steam turbine system, the measurements of each of the three or more different operating points including a position of the high-pressure control valve, a position of the low-pressure control valve, and two of process variables of the steam turbine system;
calculate coefficients of a steam performance map of the steam turbine system based on the measurements of each of the three or more different operating points, the steam performance map representing a first relationship between the position of the high-pressure control valve and the two of the process variables of the steam turbine system, and a second relationship between the position of the low-pressure control valve and the two of the process variables of the steam turbine system; and
generate the steam performance map of the steam turbine system based on the coefficients.

US Pat. No. 10,247,138

ELECTRIC TRACK LOCK

Woodward, Inc., Fort Col...

1. A track lock assembly comprising:a pawl assembly comprising:
a cam arm extending from a pawl axis and having a pawl cam; and
a pawl arm extending from the pawl axis to a distal end configured to engage a slot in a slider assembly and contact a slot end of the slot, wherein the pawl assembly is configured to rotate about the pawl axis from a pawl locked position in which the distal end of the pawl arm is engaged in the slot and is positioned to contact the slot end upon movement of the slider assembly, and the pawl cam is disengaged from a slider cam extending from the slider assembly, to a pawl unlocked position in which the distal end of the pawl arm is rotated away from the slot to a position that does not interfere with movement of the slider assembly and the pawl cam is rotated toward contact with the slider cam extending from the slider assembly; and
a position lock assembly comprising a first lock arm extending from a lock axis and an actuator configured to urge rotation of the first lock arm between a lock locked position and a lock unlocked position, the first lock arm configured to engage and retain the cam arm in the pawl locked position when the first lock arm is in the lock locked position and disengage the cam arm in the lock unlocked position such that the pawl assembly is able to rotate to the pawl unlocked position.

US Pat. No. 10,228,670

CHARACTERIZATION USING MULTIPLEXED RESISTANCE READING

Woodward, Inc., Fort Col...

1. An identification system comprising:a first component comprising:
a first resistor; and
a second resistor;
a second component comprising:
a sensor configured to sense a voltage difference between a first bus and a second bus; and
a selector signal output port configured to provide a first selector signal and a second selector signal; and
a third component comprising:
a switching network configured to electrically connect the second bus to the first bus across one of the first resistor and the second resistor in response to the first selector signal, and electrically connect the second bus to the first bus across a different one of the first resistor or the second resistor in response to the second selector signal.

US Pat. No. 10,227,951

LIMITED FLOW THRUST REVERSER ACTUATING

Woodward, Inc., Fort Col...

1. An engine assembly, comprising:a nacelle configured to at least partially surround an engine; and
a thrust reverser coupled to the nacelle, the thrust reverser comprising:
a thrust-reversing element movable relative to the nacelle between a stowed position and a deployed position;
a hydraulic actuator operably coupled to move the thrust-reversing element between the stowed position and the deployed position; and
a fluid control system configured to operate the hydraulic actuator, the fluid control system comprising: a directional control unit including a directional control valve operable to selectively route fluid between an isolation valve, the actuator, and a fluid return reservoir;
an isolation control unit comprising the isolation control valve operable to selectively route fluid flow between a pressurized fluid source and the directional control unit; one or more bypass fluid lines providing fluid communication between the actuator and the fluid return reservoir independent of the isolation control valve and the directional control valve; and a flow limiter residing between the pressurized fluid source and the directional control valve, the flow limiter configured to inhibit a pressure draw by the actuator from surpassing a predetermined threshold;
wherein the isolation control valve is operable to selectively inhibit or permit fluid flow between the directional control valve and the pressurized fluid source and the fluid return reservoir; and
wherein the isolation control unit further includes a piloted valve operable in a first stage, where fluid flow from the fluid return reservoir to the actuator through the one or more bypass fluid lines is inhibited, and a second stage, where fluid flow from the fluid return reservoir to the actuator is uninhibited.

US Pat. No. 10,197,139

LINEAR ACTUATOR WITH SELECTIVE DISENGAGEMENT

Woodward, Inc., Fort Col...

1. An actuator, comprising:a housing defining a longitudinal axis;
a sleeve rotatably mounted within the housing, the sleeve defining a bore therethrough;
a drive screw rotatably mounted within the housing, the drive screw disposed within the bore of the sleeve;
a ram linearly movable within the bore of the sleeve the ram including a ram body and at least one drive nut mounted on the ram body, the at least one drive nut arranged on the ram body for threaded engagement with the drive screw; and
wherein rotation of the sleeve in a first rotational direction disengages the at least one drive nut from the drive screw.

US Pat. No. 10,436,345

SIMPLIFIED MECHANISM FOR A SCOTCH YOKE ACTUATOR

Woodward, Inc., Fort Col...

1. An actuator for converting linear motion into rotational motion, the actuator mechanism comprising:a cylinder having a longitudinal axis and a power piston disposed in the cylinder, the power piston configured to move in a reciprocating manner back and forth within the cylinder along the longitudinal axis;
a slider bearing disposed within a cross-bore opening in the power piston, the cross-bore opening having a slider bearing axis that is orthogonal to the longitudinal axis, the slider bearing configured to move back and forth within the cross-bore opening;
an output shaft having a central axis that is orthogonal to both the longitudinal axis and the slider bearing axis, the output shaft including an eccentric shaft pin inserted through a slot in the power piston and disposed within a cavity of the slider bearing, the eccentric shaft pin being offset from the central axis of the output shaft;
wherein the reciprocating movement of the power piston causes the slider bearing to move back and forth rotating the output shaft.

US Pat. No. 10,316,803

PASSIVE PUMPING FOR RECIRCULATING EXHAUST GAS

Woodward, Inc., Fort Col...

9. An engine system comprising:an intake manifold configured to receive a combustible mixture configured to be combusted within a combustion chamber;
a throttle upstream of the intake manifold, the throttle configured to at least partially regulate an air flow into the intake manifold;
an exhaust manifold configured to receive combustion products from the combustion chamber; and
an exhaust gas recirculation mixer downstream of the throttle and upstream of an intake manifold, the exhaust gas recirculation mixer comprising:
a convergent nozzle in a flow path from an air inlet of the mixer to an outlet of the mixer, the convergent nozzle converging toward the outlet of the mixer;
an exhaust gas housing comprising an exhaust gas inlet into an interior of the exhaust gas housing;
a convergent-divergent nozzle comprising an air-fuel-exhaust gas inlet in fluid communication to receive fluid flow from the convergent nozzle, the interior of the exhaust gas housing, and a fuel supply into the mixer; and
a fuel supply coupled to the mixer, the fuel supply comprising a fuel supply tube positioned parallel to and centrally within the air flow path, the fuel supply tube configured to supply fuel into the air flow path upstream of the convergent nozzle.

US Pat. No. 10,273,661

MULTI-CHAMBER ROTARY PISTON ACTUATOR

Woodward, Inc., Fort Col...

1. A fluid actuator comprising:a housing comprising a first chamber wall defining an arcuate first chamber, a first fluid port in fluid communication with the arcuate first chamber, and a first open end;
a first piston assembly comprising an arcuate-shaped tubular first piston comprising a second chamber wall defining an arcuate second chamber, a second fluid port in fluid communication with the arcuate second chamber, a enclosed end, and a second open end, disposed in said housing for reciprocal movement in the first chamber through the first open end relative to the housing, wherein a first seal, the first chamber wall, and the first piston define a first pressure chamber; and
a second piston assembly comprising an arcuate-shaped second piston disposed in said first piston assembly for reciprocal movement in the second chamber through the second open end relative to the housing, wherein a second seal, the second chamber wall, and the second piston define a second pressure chamber, and a first portion of the second piston contacts a first end effector.

US Pat. No. 10,267,524

PREFILMING FUEL/AIR MIXER

Woodward, Inc., Fort Col...

1. A turbine combustor assembly, comprising:a fuel/air mixer assembly comprising a plurality of fuel/air mixer elements, each of the fuel/air mixer elements comprising:
a fuel/air mixer body having an internal cavity extending axially between an air inlet and an air outlet; and
a prefilmer residing within the internal cavity of the fuel/air mixer body, the prefilmer comprising:
a frame having a bore defining a curved inner wall;
an axial inner air flow passage within the bore of the frame, the axial inner air flow passage extending coaxially with an axial centerline of the internal cavity of the fuel/air mixer body; and
a radial fuel injection port residing along the curved inner wall of the bore of the frame and in fluid communication with the air flow passage; and
a fuel injector coupled to the fuel/air mixer assembly, the fuel injector arranged to direct fuel into a plurality of the fuel/air mixer elements via the fuel injection port of the prefilmer of each fuel/air mixer element, the fuel injector comprising a tip portion comprising a central fuel outlet and a plurality of peripheral fuel outlets, each of the peripheral fuel outlets being fluidically coupled to a respective fuel injection port.

US Pat. No. 10,260,296

CENTRIFUGE TRANSPORTATION APPARATUS

1. A transportable support apparatus, the apparatus comprising:a lifting apparatus for raising and lowering centrifuge equipment, the lifting apparatus having a support structure, a base portion and a scissor-lift device disposed between the support structure and the base portion, the scissor-lift device comprising:
a first arm having a first end and a second end pivotally connected to a second arm having a first end and a second end, the first end of the first arm hingedly connected to the base portion and the second end of the first arm slidably engaged with the support structure, the first end of the second arm slidably engaged with the base portion and the second end of the second arm hingedly connected to the support structure; and
wherein the first arm and the second arm are offset from each other to engage with guiding elements disposed on the support structure and the base portion.

US Pat. No. 10,458,293

METERING PLATE FOR REDUCTION IN DISCHARGE COEFFICIENT VARIATION BETWEEN GASEOUS FUEL INJECTORS

Woodward, Inc., Fort Col...

1. A metering plate for a poppet-style valve, the metering plate comprising:a fluid-directing body, the fluid-directing body defining a first surface and at least one peripheral surface substantially perpendicular to the first surface; and
at least one peripheral edge structure located proximal to the first surface, the at least one peripheral edge structure extending between the first surface and the at least one peripheral surface;
wherein each of the at least one peripheral edge structure includes a transition surface, the transition surface extending at least a portion of the at least one peripheral edge structure between the first surface and the at least one peripheral surface.

US Pat. No. 10,400,776

LOAD SHARING CONTROL FOR COMPRESSORS IN SERIES

Woodward, Inc., Fort Col...

1. A compressor system comprising:a compressor train including two or more compressors connected in series;
a primary control mechanism being controlled by a primary performance controller; and
a secondary control mechanism being controlled by a secondary performance controller, the secondary performance controller being operable to:
identify a process variable of the secondary performance controller, wherein the process variable of the secondary performance controller comprises a pressure between the primary control mechanism and the secondary control mechanism;
receive, on a recurrent basis from a load sharing controller, a setpoint for the process variable of the secondary performance controller, wherein the setpoint is determined dynamically during operation of the two or more compressors by the load sharing controller based on a load sharing parameter associated with the two or more compressors; and
control the secondary control mechanism based on the setpoint and the process variable of the secondary performance controller to operate consistently with the primary control mechanism in response to a change in a process variable or a setpoint of the primary control mechanism.

US Pat. No. 10,401,398

FINGERPRINTING OF FLUID INJECTION DEVICES

Woodward, Inc., Fort Col...

1. A method for characterizing a fluid injector, comprising:measuring, by an actuator controller, a plurality of electrical waveforms, each waveform corresponding to power consumption of a selected magnitude of electrical excitation provided to an actuator of a fluid injector;
determining, by the actuator controller, a collection of data representative of the plurality of electrical waveforms and based on the measuring of the plurality of electrical waveforms;
identifying, by the actuator controller, a pull locus, based on the collection of data;
determining, by the actuator controller, a detection threshold level value, based on the collection of data;
identifying, by the actuator controller, a first subset of the collection of data representative of a selected first electrical waveform of the plurality of electrical waveforms, based on the detection threshold level value and the collection of data;
identifying, by the actuator controller, a representative opening value, based on the collection of data;
identifying, by the actuator controller, a representative closing value, based on the representative opening value and the collection of data;
identifying, by the actuator controller, an anchor value, based on the collection of data and the first subset;
identifying, by the actuator controller, a second subset of the collection of data, representative of a selected second electrical waveform of the plurality of electrical waveforms, based on the collection of data, the pull locus, the first subset, and the representative opening value;
identifying, by the actuator controller, a maximum electrical value, based on the second subset;
identifying, by the actuator controller, an opening locus based the collection of data, the anchor value, and the maximum electrical value;
identifying, by the actuator controller, a hold value based on the collection of data; and
providing, by the actuator controller, characteristics associated with the fluid injector comprising the pull locus, the opening locus, the hold value, the anchor value, and the representative closing value.

US Pat. No. 10,544,770

MECHA-HYDRAULIC ACTUATED INLET CONTROL VALVE

Woodward, Inc., Fort Col...

1. A fluid control device comprising:a housing defining a plunger cavity in fluid communication with a fluid inlet and a fluid outlet;
a valve comprising:
a shaft having a first end and a second end; and
a stopper at the first end, configured to block a fluid circuit between the fluid inlet and the fluid outlet in a first configuration of the inlet control valve and connect the fluid circuit in a second configuration of the inlet control valve; and
a plunger configured for axial movement within the plunger cavity, defining a shaft cavity having an inner wall extending from an enclosed end to an open end in fluid communication with the fluid outlet, and configured to accommodate axial movement of the shaft within the shaft cavity.

US Pat. No. 10,458,441

ROTARY PISTON ACTUATOR ANTI-ROTATION CONFIGURATIONS

Woodward, Inc., Fort Col...

9. A method of assembling a rotary actuator, the method comprising:receiving a first assembly comprising:
a housing comprising a radial recess formed in an external peripheral surface of the housing and an interior surface that defines an arcuate chamber, the arcuate chamber comprising a cavity, a fluid port in fluid communication with the cavity, and an open end, the housing comprising a mounting lug that projects radially outward from a cylindrical exterior portion of the housing at a mounting end of the housing, the mounting lug providing a mounting point for removably affixing the rotary actuator to an external mounting surface;
a rotor assembly rotatably journaled in the housing and comprising a rotary output shaft and a rotor arm extending radially outward from the rotary output shaft through the radial recess; and
an arcuate-shaped piston disposed in the housing for reciprocal movement in the arcuate chamber through the open end, wherein a seal, the cavity, and the piston define a pressure chamber, and a portion of the piston connects to the rotor arm;
receiving a support ring comprising a second mounting lug that projects radially outward from a cylindrical exterior portion of the support ring;
positioning the support ring about a cylindrical exterior portion of the housing at a supporting end of the housing axially opposed to the mounting end;
energizing the rotor assembly;
urging rotation of the rotary output shaft;
urging rotation of the rotor arm; and
urging motion of a member to be actuated.

US Pat. No. 10,415,832

MULTI-SWIRLER FUEL/AIR MIXER WITH CENTRALIZED FUEL INJECTION

Woodward, Inc., Fort Col...

1. A gas turbine combustor assembly, comprising:a fuel/air mixer assembly comprising a plurality of fuel/air mixer elements including a center fuel/air mixer element and multiple peripheral fuel/air mixer elements arranged around the center fuel/air mixer element, each of the peripheral fuel/air mixer elements comprising a housing having a sidewall defining an air flow passage and an air swirler residing in the air flow passage, the sidewall of the housing comprising a fuel port opening to the air flow passage at a location axially downstream of the air swirler; and
a fuel injector coupled to the fuel/air mixer assembly, the fuel injector having a tip portion comprising a single unitary structure at the furthest distal end of the fuel injector, the tip portion having a plurality of fuel outlets including an axially oriented center fuel outlet and multiple radially oriented peripheral fuel outlets arranged around the center fuel outlet, the center fuel outlet arranged to inject fuel directly into the center fuel/air mixer element, each of the peripheral fuel outlets arranged to inject fuel directly into a respective fuel port of each of the peripheral fuel/air mixer elements, the center fuel outlet configured to produce a first spray pattern, and the peripheral fuel outlets configured to produce a second spray pattern that is different from the first spray pattern.

US Pat. No. 10,408,454

GAS TURBINE ENGINE FLOW REGULATING

Woodward, Inc., Fort Col...

1. A gas turbine combustor assembly, comprising:a fuel injector;
a dome stator around the fuel injector;
a dome sleeve coupled to the dome stator and defining:
an air inlet opening with the dome stator, the dome sleeve carried to move with respect to the dome stator and change a flow area of the air inlet opening as the dome sleeve moves; and
a nozzle sloping downstream from the air inlet opening toward an outlet of the combustor assembly, the sloping nozzle axially aligned with and radially surrounding at least a portion of the fuel injector, the sloping nozzle cooperating with a surface of the fuel injector to define an annular pinch gap adjacent an outlet of the fuel injector, and the sloping nozzle coupled to move with the dome sleeve and change a flow area through the annular pinch gap as the dome sleeve moves.

US Pat. No. 10,408,282

WRAP SPRING TORQUE NIPPLE

Woodward, Inc., Fort Col...

1. A wrap spring, comprising:a first helical spring;
a second helical spring;
a middle portion connected to and between the first helical spring and the second helical spring;
wherein the first helical spring and the second helical spring have different rotational helix orientations, and wherein the first helical spring is configured to receive an input shaft, and the second helical spring is configured to receive an output shaft, wherein the wrap spring transfers rotational power from the input shaft to the output shaft; and wherein the middle portion includes holes that lead into grooves along a bore of the middle portion and wherein the grooves and holes are configured to receive lock wires that secure the input and output shafts axially to the middle portion.

US Pat. No. 10,400,817

RADIAL BEARING DEVICE

Woodward, Inc., Fort Col...

1. A bearing device for supporting a shaft to rotate relative to an outer hub, the bearing device comprising:an annular outer race mountable within an interior bore of the hub, the outer race comprising an inwardly facing radial groove sized to receive a rounded bearing element; and
an annular inner race mountable to an outwardly curved exterior surface of the shaft, the inner race comprising:
an outwardly facing radial groove sized to receive the bearing element, the respective radial grooves of the inner and outer races together forming an annular raceway to retain the bearing element when the bearing device is assembled; and
an axially convex surface along an innermost diameter of the inner race, the convex surface comprising a continuous surface having two peripheral surface portions on either side of a crowned surface portion, the convex surface shaped to directly engage the crowned surface portion of the inner race with the exterior surface of the shaft when mounted thereto, such that the inner race remains in contact with the shaft while simultaneously accommodating radial deflection of the shaft caused by external forces,
wherein each of the outer race and the inner race comprises a raised radial shoulder adjacent the respective radial grooves, the height of the shoulder of the inner race in a radial direction being greater than the height of the shoulder of the outer race in the radial direction, and wherein a ratio of the inner race shoulder height relative to the outer race shoulder height is between 1 and 1.5.

US Pat. No. 10,359,798

ADAPTIVE PID CONTROL SYSTEM FOR INDUSTRIAL TURBINES

Woodward, Inc., Fort Col...

15. A system comprising:a process controller configured to perform a control algorithm based on at least an integral gain (I) value, an input value and a first derivative gain (D) value;
a parameter controller comprising a programmable processor configured to perform a parameter adjustment algorithm tangibly embodied in a machine-readable storage device and based on at least a speed derivative ratio (SDR);
wherein the parameter adjustment algorithm is configured to perform operations comprising:
controlling, by the process controller, the process based on at least the first derivative gain (D) value, the integral gain (I) value, and the input value;
receiving, by the parameter controller, a process response value provided by a process output sensor;
determining, by the parameter controller, an updated derivative gain (D) value based on at least the process response value, an integral gain (I) value, the speed derivative ratio (SDR), and the parameter adjustment algorithm;
providing, to the process controller from the parameter controller, the updated derivative gain (D); and
controlling, by the process controller, the process based on at least the updated derivative gain (D) value, the integral gain (I) value, and the input value.

US Pat. No. 10,563,354

HYDROPHOBIC AND/OR AMPHIPHOBIC ROLL COVER

Stowe Woodward Licensco L...

1. An industrial roll, comprising:a substantially cylindrical metallic core;
a base layer that is adhered to and circumferentially overlies the core;
a polymeric topstock layer that circumferentially overlies the base layer;
a hydrophobic or amphiphobic coating that circumferentially overlies the topstock layer; and
a transition layer between the topstock layer and the hydrophobic or amphiphobic coating, wherein the transition layer comprises an interphase mixing of the topstock layer and the hydrophobic or amphiphobic coating,
wherein the polymeric topstock layer comprises polyurethane and the hydrophobic or amphiphobic coating comprises at least two hydrophobic and/or amphiphobic compounds and a matrix material comprising polyurethane,
wherein the hydrophobic or amphiphobic coating comprises the at least two hydrophobic and/or amphiphobic compounds each in a ratio of about 5 parts to about 30 parts against 100 parts by weight of the polyurethane,
wherein the at least two hydrophobic and/or amphiphobic compounds are polytetrafluoroethylene (PTFE) and hydrophobic diatomaceous earth, each compound having a size in a range of about 10 nm to about 500 ?m,
wherein the hydrophobic or amphiphobic coating has a contact angle greater than 120° for water.

US Pat. No. 10,563,677

BUTTERFLY ROTARY PISTON TYPE ACTUATOR

Woodward, Inc., Fort Col...

1. An articulated joint comprising:a first rotary actuator comprising:
a first housing defining a first arcuate chamber comprising a first cavity and a first open end; and
an arcuate-shaped first piston having a first radius of curvature and disposed in said first housing for reciprocal movement in the first arcuate chamber through the first open end and in a first plane about a first axis; and
a second rotary actuator comprising:
a second housing defining a second arcuate chamber comprising a second cavity and a second open end; and
an arcuate-shaped second piston having a second radius of curvature and disposed in said second housing for reciprocal movement in the second arcuate chamber through the second open end and in a second plane substantially parallel to the first plane about a second axis;
wherein a first radial side of the first piston relative to the first radius of curvature is in bearing contact with a first radial side of the second piston relative to the second radius of curvature at a contact point between the first axis and the second axis.

US Pat. No. 10,556,195

FLUID REMOVAL APPARATUS FOR USE WITH A WEIR TANK

1. A separation apparatus, the apparatus comprising:a weir tank having a plurality of cells;
a fluid removal apparatus for each cell to remove the fluid from each cell, the fluid removal apparatus comprising:
an actuator;
an extension arm whose movement is caused by the actuator; and
a plunger attached to the extension arm for selectively engaging a first opening in each cell;
a first opening disposed in a bottom portion of each cell of the weir tank; and
a second opening disposed in each cell of the weir tank, the second opening is disposed in an angled portion disposed between the bottom portion of the weir tank and a side of the weir tank; wherein the fluid removal apparatus engages the first and second opening disposed in each cell of the weir tank.

US Pat. No. 10,483,824

SELF-RELEASING LOCK MECHANISM

Woodward, Inc., Fort Col...

1. A self-releasing lock mechanism configured to lock a driveshaft to mechanical ground, the driveshaft being in mechanical communication with a first end of a rotor of a motor, the motor being disposed in a motor housing having a flange region that is connected to mechanical ground, the self-releasing lock mechanism comprising:a ground lock housing, the ground lock housing configured to surround at least a portion of the motor housing and the ground lock housing including a locking arrangement configured to selectively engage a second end of the rotor;
at least one locking pin that extends from the ground lock housing, the at least one locking pin configured to extend into and pass through the flange region of the motor housing;
a locking plate comprising the driveshaft and at least one locking site, the at least one locking site adapted to selectively receive the at least one locking pin; and
a biasing member disposed between the ground lock housing and the flange region;
wherein the biasing member biases the ground lock housing away from the flange region;
wherein the locking arrangement engages the second end of the rotor to overcome the bias from the biasing member when the at least one locking pin is received in the at least one locking site.

US Pat. No. 10,458,346

COMBUSTION PRESSURE FEEDBACK BASED ENGINE CONTROL WITH VARIABLE RESOLUTION SAMPLING WINDOWS

Woodward, Inc., Fort Col...

1. A controller for controlling operation of a dual-fuel internal combustion engine of an engine system, the engine system comprising a pressure sensor configured to measure pressure in a cylinder of the engine and generate a corresponding pressure signal and a crank angle sensor configured to measure the crank angle of the engine and generate a corresponding crank angle signal, the controller comprising:a processor couplable to the pressure sensor and the crank angle sensor; and
at least one non-transitory computer readable medium storing instructions operable to cause the processor of the controller to perform operations comprising:
(a) sample the crank angle signal,
(b) sample the pressure signal of each cylinder of the engine at a first frequency during a first range of cylinder crank angles, the first range of cylinder crank angles including the ignition position of the cylinder and at least a portion of a combustion period of the cylinder,
(c) sample the pressure signal at a second frequency during a second range of cylinder crank angles, the second frequency being lower than the first frequency,
(d) calculate combustion metrics including indicated mean effective pressure (IMEP), an adiabatic heat release rate of combustion in the cylinder, and combustion phasing based on the sampled crank angle and pressure signals,
(e) determine a combustion phasing trigger and a fuel substitution rate between a first fuel and a second fuel as a function of the calculated adiabatic heat release rate of combustion in the cylinder,
(f) adjust the combustion phasing trigger based on the calculated combustion phasing to meet a combustion phasing target,
(g) adjust the fuel substitution rate based on the calculated IMEP to meet an IMEP target, and
(h) control the engine based on the adjusted combustion phasing trigger and fuel substitution rate.

US Pat. No. 10,221,525

SUCTION ROLL WITH PATTERN OF THROUGH HOLES AND BLIND DRILLED HOLES THAT IMPROVES LAND DISTANCE

Stowe Woodward Licensco, ...

1. An industrial roll, comprising:a substantially cylindrical shell having an outer surface and an internal lumen;
a polymeric cover circumferentially overlying the shell outer surface, wherein the shell and cover have a plurality of through holes that provide fluid communication between the lumen and the atmosphere, and the cover has a plurality of blind drilled holes;
wherein the through holes and the blind drilled holes are arranged in a pattern in which:
(a) the through holes are arranged in rows that define an oblique angle relative to a plane that is perpendicular to a longitudinal axis of the roll;
(b) the through holes of one row are offset from the through holes of the adjacent row, with the offset between rows defining an angle of approximately 20-40 degrees;
(c) the blind drilled holes are arranged in rows located between the rows of through holes;
(d) the blind drilled holes of one row are offset slightly from the blind drilled holes of the adjacent row, with the offset between rows defining an angle similar to that defined by the through holes; and
(e) each of the blind drilled holes is located at the substantial center of a triangle defined by the closest three through holes.