US Pat. No. 9,188,236

FILL-UP CONTROL VALVE DEVICE

KYOSAN DENKI CO., LTD., ...

1. A fill-up control valve device for use in a vehicle having a fuel tank, the fill-up control valve device comprising:
a casing mounted to the fuel tank and including:
a ventilation passage communicating with an interior of the fuel tank to an exterior of the fuel tank, the ventilation passage
being configured to allow gas in the interior of the fuel tank to be discharged to the exterior of the fuel tank, and

an end cap configured to close an end of the casing and which has a notch communicating with an interior of the casing to
an exterior of the casing;

a first float valve provided vertically movably in an accommodation space formed in the casing, the first float valve being
configured to float on liquid fuel in the casing, and configured to open and close the ventilation passage with a vertical
movement of a fuel surface in the casing; and

a second float valve provided vertically movably in an accommodation space formed in an upstream portion of a location in
the casing, the second float valve being configured to open and close the ventilation passage with a vertical movement of
a fuel surface in the casing, wherein:

the first float valve is configured to close the ventilation passage when a fuel surface in the fuel tank rises by a fuel
flowing into the casing via the notch of the end cap and reaches a first predetermined level, and a fuel surface in the casing
is pressed up to a second predetermined level higher than the first predetermined level;

the casing has a vent hole that is provided above the second predetermined level and that communicates an interior space of
the fuel tank with the accommodation space;

the casing includes a container which has a bottom surface and in which the first float valve is disposed;
the container includes: (i) an introduction port provided above the bottom surface and that introduces liquid fuel into the
container until the liquid fuel reaches the second predetermined level, and (ii) a discharge passage provided below the introduction
port to extend through the container and configured to discharge the liquid fuel introduced from the introduction port into
the container to an exterior of the container, the discharge passage includes a passage cross-sectional area smaller than
an opening area of the introduction port;

the location of the second float valve is disposed in the casing where the container is disposed in a discharge direction
of the ventilation passage;

the second float valve has an air storage recess that is recessed upward, and an air-discharge hole that communicates the
air storage recess with the ventilation passage located on a downstream side of the second float valve in the discharge direction;

the second float valve is configured to float on liquid fuel in the casing to close the ventilation passage when air is stored
in the air storage recess, in a case that a fuel surface in the fuel tank rises and reaches the first predetermined level,
and then a fuel surface in the accommodation space formed in the upstream portion in the casing is pressed up to a third predetermined
level higher than the first predetermined level;

the second float valve is configured to not float on liquid fuel in the casing to open the ventilation passage when air in
the air storage recess is discharged from the air-discharge hole and the liquid fuel enters into the air storage recess, in
a case that a fuel surface in the fuel tank rises by the fuel flowing into the case via the notch of the end cap and reaches
the first predetermined level, and then a fuel surface in the accommodation space formed in the upstream portion in the casing
is pressed up to a third predetermined level higher than the first predetermined level;

the casing includes an upper tubular case accommodating the first float valve, a lower tubular case accommodating the second
float valve and a pipe; and

the ventilation passage is formed within the casing to ventilate the lower tubular case, the upper tubular case and the pipe
successively from the end of the casing at which the notch of the end cap is formed to allow gas in the fuel tank to be discharged.

US Pat. No. 10,054,088

FUEL SUPPLY DEVICE

DENSO CORPORATION, Kariy...

1. A fuel supply device, comprising:a fuel pump;
a filter case that houses a fuel filter; and
a port member joined to the filter case, wherein
a fuel pumped by the fuel pump from inside a fuel tank is filtered by the fuel filter and supplied from inside the filter case toward an internal combustion engine, and
the port member integrally includes a plurality of fuel ports that communicate from inside of the filter case to outside of the filter case wherein
the port member forms, as one of the fuel ports, a discharge port that discharges fuel in the filter case toward the internal combustion engine outside the filter case,
the filter case has disposed therein
a fuel passage including a communication port, the communication port being in communication with a housing chamber in the filter case, which houses the fuel filter, at a location downstream from the fuel filter, the fuel passage allowing fuel to flow from the communication port,
an external residual pressure retention valve having a valve element that, when the fuel pump is operating, opens and becomes locked by a valve stopper, the external residual pressure retention valve being a spring-less type external residual pressure retention valve that, when the fuel pump is stopped, retains a pressure of the fuel discharged from the discharge port toward the internal combustion engine, and
an internal residual pressure retention valve having a valve element that, when the fuel pump is operating, resists a spring reaction force to open, the internal residual pressure retention valve being a spring-biased type residual pressure retention valve that, when the fuel pump is stopped, retains a pressure of the fuel in the housing chamber,
the communication port opens at an offset location in the fuel passage, the offset location being offset from the internal residual pressure retention valve toward the external residual pressure retention valve,
the fuel passage has formed therein
an external passage portion that allows fuel, which is for being discharged by the discharge port toward the internal combustion engine, to flow from the communication port toward the external residual pressure retention valve, and
an internal passage portion that allows fuel to flow from the communication port toward the internal residual pressure retention valve, the internal passage portion narrowing down a fuel flow more than the external passage portion, and
when a passage cross-sectional area of the internal passage portion is converted into a passage cross-sectional area of a cylindrical pipe, a passage diameter D of this cylindrical pipe and a length L of the internal passage portion satisfy the equation L/D?3.

US Pat. No. 9,410,635

FUEL VAPOR CONTROL DEVICE

Kyosan Denki Co., Ltd., ...

1. A fuel vapor control device for regulating a flow amount of fuel vapor disposed in a fuel vapor control system for controlling
the fuel vapor, the fuel vapor control device comprising:
a case defining a passage for the fuel vapor; and
a movable valve element which is accommodated in the case and is supported so as to be displaced in an axial direction in
accordance with a pressure, the movable valve having a seating portion for switching between a regulating condition in which
the flow amount of fuel vapor is regulated and a non-regulating condition in which a flow amount larger than the regulating
condition is permitted by being seated to and being lifted from a fixed seat disposed on the case, wherein

the movable valve element includes:
a central cylindrical part extending straight along the axial direction, which defines a central channel as a main channel
of which passage area is constant according to the displacement of the movable valve element; and

a flange part which is disposed so as to extend outwardly from the central cylindrical part; wherein
the flange part defines a gap as a sub channel between the case and the flange part,
the flange part has the seating portion on a location outwardly distanced from the central cylindrical part; and
the flange part comprises:
an annular disc part extending outwardly from the central cylindrical part; and
an outer cylindrical part extending in the axial direction from a radial outside rim of the annular disc part, the outer cylindrical
part having the seating portion on an end thereof, the seating portion and the fixed seat opening the sub channel in the non-regulating
condition and close the sub channel in the regulating condition.

US Pat. No. 9,494,325

FUEL TANK STRUCTURE

TOYOTA JIDOSHA KABUSHIKI ...

1. A fuel tank structure comprising:
a fuel tank that can accommodate fuel at an interior;
a canister comprising an adsorbent, the canister adsorbing evaporated fuel within the fuel tank, and releasing, to the atmosphere,
vapor after adsorption of evaporated fuel;

a full tank regulating valve that is provided within the fuel tank, and that becomes a closed state due to a float floating
in fuel when a fuel liquid surface within the fuel tank reaches a full tank liquid level that is set in advance;

a communication pipe that communicates with the fuel tank and the canister via the full tank regulating valve, and at which
is provided a sealing valve that can be opened and closed by control;

a cross-sectional area varying valve that, when tank internal pressure that is applied from inside of the fuel tank increases,
reduces a cross-sectional area of a flow path of vapor that flows toward the float; and

a suppressing member that is positioned between the cross-sectional area varying valve and the float, and that suppresses
airflow from the cross-sectional area varying valve from directly abutting the float, wherein:

the cross-sectional area varying valve has an upper bottom portion, a tube portion, a main body, and a lower bottom portion
that supports the main body from a lower side,

a through-hole is formed in the lower bottom portion, and
a through passage, that passes through the main body in the vertical direction, is formed in a substantially center portion,
along a horizontal direction of the main body, of the main body.

US Pat. No. 10,054,089

FUEL SUPPLY DEVICE

DENSO CORPORATION, Kariy...

1. A fuel supply device which supplies a fuel in a fuel tank to an internal combustion engine outside the fuel tank in a vehicle, comprising:a sub-tank held inside the fuel tank;
a pump unit housed in the sub-tank and discharging the fuel stored in the sub-tank to the internal combustion engine by pressurizing the fuel;
a jet pump installed on a bottom of the sub-tank to pump the fuel stored in the fuel tank into the sub-tank by jetting a pressurized fuel guided from the pump unit; and
a connection structure connected with the pump unit and the jet pump, wherein
the connection structure has
a guide part being a cylindrical shape, the guide part provided to the pump unit, and the guide part guiding the pressurized fuel toward the bottom in an axial direction,
a pressurizing part being a cylindrical shape, the pressurizing part provided to the jet pump, and the pressurizing part being fitted to the guide part from a side of the bottom in an axially slidable manner, to which the pressurized fuel is guided from the guide part,
a shock-absorbing member having a low spring constant that is predetermined and mitigating an axial impact between the guide part and the pressurizing part, and
a sealing member having a high spring constant higher than the low spring constant of the shock-absorbing member, and the sealing member radially sealing a space between the guide part and the pressurizing part,
the guide part and the pressurizing part define a gap, and
the sealing member is located in the gap, performs a sealing function to the pressurized fuel that enters the gap, and presses the pressurizing part toward the bottom.

US Pat. No. 9,328,704

FUEL SUPPLY APPARATUS

DENSO CORPORATION, Kariy...

1. A fuel supply apparatus comprising:
a flange that is configured to be installed to a fuel tank;
a pump unit that is configured to be installed in an inside of the fuel tank to pump fuel received in the inside of the fuel
tank to an outside of the fuel tank;

a support shaft that is configured into a tubular body and connects between the flange and the pump unit;
a resilient member that is received in the support shaft and exerts a restoring force in an axial direction of the support
shaft to urge the pump unit, which is movable relative to the support shaft in the axial direction, toward a bottom portion
of the fuel tank, and

a holding member that holds the pump unit, wherein:
the holding member includes a receiver, which is configured into a tubular body and axially slidably receives the support
shaft;

the restoring force of the resilient member, which is received in the support shaft, is exerted against the receiver;
the support shaft is an upper support shaft, which is fixed to the flange installed to an upper opening of the fuel tank;
the fuel supply apparatus further comprises a lower support shaft, which is received in the receiver;
the resilient member is clamped between the upper support shaft and the lower support shaft;
the lower support shaft is coupled to the receiver and the upper support shaft such that the lower support shaft is slidable
in the axial direction relative to the receiver and the upper support shaft; and

the lower support shaft is adapted to be engaged with the receiver when the lower support shaft is placed to a movable end
of the lower support shaft upon movement of the lower support shaft into the receiver in an inserting direction of the lower
support shaft for inserting the lower support shaft into the receiver.

US Pat. No. 10,035,091

LIQUID FUEL CATCHER

Kyosan Denki Co., Ltd., ...

1. A liquid fuel catcher, which allows fuel vapor to pass through and catches a liquid fuel, the liquid fuel catcher comprising:a case which defines a passage through which fluid containing fuel vapor and the liquid fuel flows, wherein the case defines:
a plurality of chambers defined as depressions on the passage so that the liquid fuel accumulates;
a communicating portion which communicates the chambers in series at upper portions of the chambers; and
a return passage which opens at each of bottom portions of the plurality of chambers and allows the liquid fuel accumulated in the chambers to return to a fuel tank, and wherein the liquid fuel catcher further comprises:
a return valve which is disposed to open and close the return passage, returns liquid fuel to the fuel tank from the plurality of chambers, and prevents reverse flow of liquid fuel from the fuel tank to the plurality of chambers, wherein
the plurality of chambers are arranged so that the passage curves,
the plurality of chambers are arranged circumferentially, and wherein the case has a barrier wall which is disposed between the chambers, and
the barrier wall is arranged radially with respect to the circumferentially arranged plurality of chambers.

US Pat. No. 10,024,282

FUEL SUPPLY DEVICE

DENSO CORPORATION, Kariy...

1. A fuel supply device, comprising:a fuel pump; and
a filter case that houses a fuel filter, wherein
a fuel pumped by the fuel pump from inside a fuel tank is filtered by the fuel filter and supplied from inside the filter case toward an internal combustion engine, and
the filter case includes
a case body having a closed bottom shape that forms a housing chamber of the fuel filter,
a case cap that covers an aperture of the case body by being joined to the case body, and
a residual pressure retention valve that, when the fuel pump is stopped, retains a pressure of the fuel supplied from inside the filter case toward the internal combustion engine, the residual pressure retention valve being disposed at a joint boundary of the case body and the case cap,
the residual pressure retention valve is an external residual pressure retention valve having a valve element that, when the fuel pump is operating, opens and becomes locked by a valve stopper, the external residual pressure retention valve being a spring-less type external residual pressure retention valve that, when the fuel pump is stopped, retains a pressure of the fuel supplied toward the internal combustion engine,
the filter case has disposed therein a fuel passage including a communication port, the communication port being in communication with the housing chamber at a location downstream from the fuel filter, the fuel passage allowing fuel, which is discharged from the communication port toward the internal combustion engine, to flow,
the filter case has disposed therein an internal residual pressure retention valve having a valve element that, when the fuel pump is operating, resists a spring reaction force to open, the internal residual pressure retention valve being a spring-biased type residual pressure retention valve that, when the fuel pump is stopped, retains a pressure of the fuel in the housing chamber,
the communication port opens at an offset location in the fuel passage, the offset location being offset from the internal residual pressure retention valve toward the external residual pressure retention valve,
the fuel passage has formed therein
an external passage portion that allows fuel, which is for being discharged toward the internal combustion engine, to flow from the communication port toward the external residual pressure retention valve, and
an internal passage portion that allows fuel to flow from the communication port toward the internal residual pressure retention valve, the internal passage portion narrowing down a fuel flow more than the external passage portion, and
when a passage cross sectional area of the internal passage portion is converted into a passage cross-sectional area of a cylindrical pipe, a passage diameter D of this cylindrical pipe and a length L of the internal passage portion satisfy the equation L/D ?3.

US Pat. No. 10,094,344

FUEL SUPPLY DEVICE

Kyosan Denki Co., Ltd., ...

1. A fuel supply device comprising:a cap which covers an opening on a fuel tank; and
a support pillar disposed between the cap and a bottom of the fuel tank, wherein the support pillar comprises:
a base portion which has a cylindrical portion and extends towards an inside of the fuel tank from the cap;
an intermediate portion which has a cylindrical portion connected with the cylindrical portion of the base portion; and
a distal end portion connected with the intermediate portion and capable of being in contact with the bottom of the fuel tank, wherein
the support pillar has a telescopic device which is capable of extending and contracting about a height direction, the telescopic device being arranged between the intermediate portion and the distal end portion,
the support pillar has a component container for arranging a valve, which is a part of an evaporated fuel emission control system, the component container being arranged between the cylindrical portion of the base portion and the cylindrical portion of the intermediate portion, and
the cylindrical portion of the intermediate portion has a cylindrical diameter part which is larger than the cylindrical portion of the base portion and is placed to cover an outside of the cylindrical portion of the base portion.

US Pat. No. 10,024,283

SUCTION FILTER

KYOSAN DENKI CO., LTD., ...

1. A suction filter for placement within and for filtering fuel in a fuel tank of a vehicle, the suction filter comprising:an intake port for location of the suction filter in the fuel tank of the vehicle, fuel being drawn from the fuel tank into the intake port by a fuel pump of the fuel tank;
a filtration member for arrangement of the suction filter in the fuel tank to filter the fuel to be drawn into the intake port, at least a part of the filtration member being located higher than the intake port;
a wall component disposed in a fuel passage, the fuel passage extends from the filtration member to the intake port so as to define a shape of the fuel passage, wherein
the wall component has an upper end positioned higher than the intake port, and the fuel passage is defined so that the fuel flowing through the fuel passage flows over the upper end,
the wall component is arranged inside the filtration member; and
a support component that supports the filtration member, wherein
the support component includes
a pipe wall part coaxially arranged with the filtration member and the wall component,
a bottom wall part arranged at an axial end of the pipe wall part,
a flange part projected from an upper end of the pipe wall part outward in a radial direction, an upper end of the filtration member is connected to the flange part, and
a locking part for attachment to the fuel pump.

US Pat. No. 9,803,594

FUEL SUPPLY DEVICE

Kyosan Denki Co., Ltd., ...

1. A fuel supply device comprising:
a cylindrical base portion which is disposed in a fuel tank, and defines a component container for containing a component;
a large diameter part connected to an outside of the base portion;
an inside snap-fit mechanism which connects the component and the base portion by an engagement of a first engaging window
disposed on the base portion and a first hook part disposed on the component; and

an outside snap-fit mechanism which connects the base portion and the large diameter part by an engagement of a second engaging
window and a second hook part, the second engaging window being disposed by penetrating the large diameter part located on
a radial outside of the inside snap-fit mechanism in a radial direction, and the second hook part being disposed on the outside
of the base portion.

US Pat. No. 10,145,342

FUEL SUPPLY DEVICE

DENSO CORPORATION, Kariy...

1. A fuel supply device comprising:a fuel pump;
a filter case that receives a fuel filter in its receiving chamber, wherein the fuel supply device filters fuel, which is pressure-sent from an interior of a fuel tank by the fuel pump, through the fuel filter and supplies fuel to an internal-combustion engine;
a fuel passage that is provided in the filter case and includes a communication port, which communicates with the receiving chamber on a downstream side of the fuel filter, wherein fuel flows from the communication port through the fuel passage;
a discharge passage that is provided in the filter case and discharges the fuel flowing through the fuel passage into the internal-combustion engine; and
a spring-urged type residual pressure holding valve that is provided at the filter case and holds a pressure of fuel in the receiving chamber when the fuel pump is stopped, wherein:
the residual pressure holding valve includes a valve element, which opens the residual pressure holding valve against spring reaction force when the fuel pump is actuated;
the communication port opens at a shifted position of the fuel passage that is positionally shifted from the residual pressure holding valve toward the discharge passage;
the fuel passage includes:
an outside passage part through which fuel flows from the communication port toward the discharge passage; and
an inside passage part that throttles along its entire length a flow of fuel flowing from the communication port toward the residual pressure holding valve more than the outside passage part; and
when a passage cross-sectional area of the inside passage part is converted into a passage cross-sectional area of a circular pipe, D which is a passage diameter of the circular pipe, and L which is a length of the inside passage part satisfy a relational expression of L/D?3.

US Pat. No. 10,060,398

FUEL SUPPLY DEVICE

Kyosan Denki Co., Ltd., ...

1. A fuel supply device comprising:a cap which covers an opening on a fuel tank; and
a support pillar disposed between the cap and a bottom of the fuel tank, wherein the support pillar comprises:
a base portion which has a cylindrical portion and extends towards an inside of the fuel tank from the cap;
an intermediate portion which has a cylindrical portion connected with the cylindrical portion of the base portion; and
a distal end portion connected with the intermediate portion and capable of being in contact with the bottom of the fuel tank, wherein
the support pillar has a telescopic device which is capable of extending and contracting about a height direction, the telescopic device being arranged between the intermediate portion and the distal end portion,
the support pillar has a component container for arranging a valve, which is a part of an evaporated fuel emission control system, the component container being arranged between the cylindrical portion of the base portion and the cylindrical portion of the intermediate portion, and
the cylindrical portion of the intermediate portion has a cylindrical diameter part which is larger than the cylindrical portion of the base portion and is placed to cover an outside of the cylindrical portion of the base portion.

US Pat. No. 10,443,552

FUEL SUPPLY DEVICE

DENSO CORPORATION, Kariy...

1. A fuel supply device for supply of stored fuel in a fuel tank of a vehicle to an outside of the fuel tank, the fuel supply device comprising:a pump unit disposed in the fuel tank and configured to suck the stored fuel from a suction port and discharge the fuel toward the outside of the fuel tank;
a pressure regulating valve disposed in the fuel tank and configured to perform pressure regulation of the fuel discharged from the pump unit, the pressure regulating valve including a return port having an opening facing in a separating direction, the separating direction being defined as a direction radially away from the suction port when the suction port is viewed in a fuel sucking direction of the suction port, the pressure regulating valve being configured to return surplus fuel generated by the pressure regulation into the fuel tank through the return port; and
a suction filter disposed in the fuel tank and enclosing an internal space where the suction port is open, the suction filter being configured to filter the stored fuel passing through the suction filter toward the internal space to be sucked into the suction port, the suction filter including an expansion part to which the internal space is extended, the return port opening that faces in the separating direction also faces toward the expansion part, wherein:
the suction filter includes an extending part to which the internal space is extended for protruding out in an opposite radial direction opposite to the separating direction, the extending part being on a side of the suction port that faces in the opposite radial direction;
the pump unit includes an outlet hole configured to allow vapor contained in fuel sucked into the suction port to be discharged into the fuel tank with the sucked fuel, the outlet hole being on a side of the pump unit that faces in the opposite radial direction; and
the pump unit includes a fuel guide configured to guide fuel discharged together with the vapor from the outlet hole to flow in the opposite radial direction.

US Pat. No. 10,011,169

FILL-UP CONTROL VALVE DEVICE

KYOSAN DENKI CO., LTD., ...

1. A fill-up control valve device comprising:a casing which is mounted to a fuel tank installed in a vehicle and in which a ventilation passage that communicates an interior of the fuel tank with an exterior of the fuel tank to allow gas in the interior of the fuel tank to be discharged to the exterior of the fuel tank is formed; and
a first float valve that is provided vertically movably in an accommodation space formed in the casing, that floats on liquid fuel in the casing, and that is configured to open and close the ventilation passage with a vertical movement of a fuel surface in the casing, wherein:
the casing has a vent hole that communicates an interior space of the fuel tank with the accommodation space;
the casing includes a container that is a container which has a bottom surface and in which the first float valve is disposed;
the container includes an introduction port that is an introduction port provided above the bottom surface and that introduces liquid fuel into the container, and a discharge passage that is provided below the introduction port to extend through the container and that discharges the liquid fuel introduced from the introduction port into the container to an exterior of the container, wherein the discharge passage has a passage cross-sectional area smaller than an opening area of the introduction port;
the fill-up control valve device further comprises a second float valve that is provided vertically movably in the accommodation space in the casing, the accommodation space being formed in an upstream portion located upstream of a location where the container is disposed in a discharge direction of the ventilation passage, and that is configured to open and close the ventilation passage with a vertical movement of the fuel surface in the casing; and
the second float valve has an air storage recess that is recessed upward, and an air-discharge hole that communicates the air storage recess with the ventilation passage located on a downstream side of the second float valve in the discharge direction.

US Pat. No. 9,915,234

VALVE STRUCTURE AND FUEL SUPPLY DEVICE

KYOSAN DENKI CO., LTD., ...

1. A valve structure located at a bottom portion of a sub tank that is arranged inside a fuel tank, the valve structure allowing
an inflow of fuel into the sub tank and preventing an outflow of the fuel from the sub tank, the valve structure comprising:
a retention element that is mounted to and is retained in a lower portion of a stored object, the stored object including
a pump device that pumps fuel from the fuel tank into the sub tank through a pumping passage that communicates an inside of
the sub tank with an outside of the sub tank, the stored object being inserted from an upper portion of the sub tank and stored
housed inside the sub tank;

a first valve body that is integrally formed with the retention element and extends from the retention element, the first
valve body being located at a natural inlet open on the bottom portion of the sub tank; and

a second valve body that is integrally formed with the retention element and extends from the retention element, the second
valve body being located on the pumping passage.

US Pat. No. 9,926,899

FUEL-FILTER ABNORMALITY DETECTION DEVICE

KYOSAN DENKI CO., LTD., ...

1. A fuel supply device for supplying fuel to an engine and configured to filtrate the fuel, comprising:a fuel pathway installed in a vehicle together with the engine and supplying fuel from a fuel tank to the engine,
a main filter housed within a main filter casing and provided in the fuel pathway; and
a fuel-filter abnormality detection device provided in the fuel pathway and configured to detect a fuel-filter abnormality of the main filter;
the fuel-filter abnormality detection device comprising:
a first filter removably attached downstream of the main filter in the fuel pathway, the first filter having a filtration capacity smaller than a filtration capacity of the main filter, the first filter trapping foreign matter on a downstream side of the main filter resulting in a change in fuel pressure indicating an abnormality of the main filter;
a second filter provided in a bypass passage that bypasses the first filter of the fuel-filter abnormality detection device, the second filter being configured to filtrate the fuel flowing in the bypass passage; and
a detector housing that houses the first filter, the second filter and the bypass passage, wherein
the fuel-filter abnormality detection device is a combination of the first filter, the second filter and the bypass passage which are assembled into a single detector replacement part of the fuel supply device, the single detector replacement part being removably connected to the fuel supply device and being replaceable separately from the main filter and the main filter casing of the fuel supply device, wherein
the main filter has a configuration permitting replacement of the main filter with a degree of replacement difficulty corresponding to disconnecting a used main filter from the fuel pathway and connecting the main filter to the fuel pathway,
the single detector replacement part includes at least one of an attached pump and a data connection, and the single detector replacement part has a configuration inhibiting replacement of the single detector replacement part with a degree of replacement difficulty higher than that of the main filter corresponding to disconnecting a used single detector replacement part from the fuel pathway and connecting the single detector replacement part to the fuel pathway including connecting at least one of the pump attached to the single detector replacement part to the fuel pathway and the data connection of the single detector replacement part to a computer.

US Pat. No. 10,473,065

FUEL RETURN DEVICE

KYOSAN DENKI CO., LTD., ...

1. A fuel return device comprising:a fuel collector located in a passage between a fuel tank and a vapor fuel processing device that processes vapor fuel discharged from the fuel tank, the fuel collector collecting fuel and storing the collected fuel as a storage fuel; and
a return system extending from the fuel collector to return the storage fuel to the fuel tank, the return system being connected to a low-pressure generation part that generates a low pressure by a flow of fuel refueled through a filler pipe into the fuel tank, wherein
the low-pressure generation part is a circulation system which causes the fuel tank and the filler pipe to communicate with each other,
the return system and the circulation system are connected with each other in a unification part, and the storage fuel is returned to the fuel tank via the return system and the circulation system, and
the circulation system has a control valve located between the fuel tank and the unification part to control a passage cross-section area so that the low pressure acts on the unification part.

US Pat. No. 9,828,952

FUEL VAPOR CONTROL VALVE AND FUEL VAPOR CONTROL SYSTEM

KYOSAN DENKI CO., LTD., ...

1. A vapor control valve for controlling vapor of fuel, comprising:
a housing member which is made of resin and defines a volume chamber therein;
a movable member, which is supported by the housing member, divides the volume chamber into a primary chamber and a secondary
chamber and opens and closes a valve, which is located between an inlet passage and an outlet passage, wherein the valve is
displaced in response to a pressure difference between the primary chamber and the secondary chamber;

an electromagnetic valve, which is located between the secondary chamber and the outlet passage and changes a communication
state between the secondary chamber and the outlet passage to an open state or a closed state; and

a passage forming member, which is made of resin and defines the inlet passage communicated to the primary chamber, wherein
the housing member and the passage forming member are arranged so that the inlet passage and the secondary chamber are adjacent
to each other and are separated by a wall portion, and

the wall portion defines a through hole, which penetrates the wall portion from the inlet passage to provide an orifice communicating
the inlet passage with the secondary chamber without penetrating the movable member,

a flow-restricting passage defined by the orifice is smaller than the inlet passage in a plane perpendicular to a direction
in which vapor flows in the inlet passage, and

at least an outer surface of the wall portion is located within the inlet passage.

US Pat. No. 10,670,161

VENT CONTROL VALVE FOR FUEL TANK

KYOSAN DENKI CO., LTD., ...

1. A vent control valve for a fuel tank, that controls a ventilation between a fuel tank and an outside, the vent control valve comprising:an annular valve seat defined in a case;
a movable valve object which is movable relative to the valve seat;
a seal component having an annular plate shape and held by the movable valve object to be seated on or separated from the valve seat to open and close a passage for ventilation; and
an annular ridge part defined in the movable valve object or the seal component such that the movable valve object and the seal component are in contact with each other on an annular seal line, wherein
the movable valve object has a retaining mechanism which holds the seal component,
the ridge part is located on an outer side of a flange part of the retaining mechanism in a radial direction, and
the movable valve object and the seal component are in contact with each other radially outside of a contact area between the valve seat and the seal component.

US Pat. No. 10,525,821

VENT CONTROL VALVE FOR FUEL TANK

KYOSAN DENKI CO., LTD., ...

1. A vent control valve for a fuel tank, that controls a ventilation between a fuel tank and an outside, the vent control valve comprising:a case having a tube shape that forms a passage for ventilation;
a movable valve object arranged in the case to be movable in an axial direction of the case to open and close the passage;
a cover that covers a lower side of the movable valve object; and
a baffle component disposed between the case and the movable valve object and located on an outer side of the movable valve object in a radial direction, wherein an outer passage is defined between the case and the baffle component, and the baffle component restricts a contact between a fluid flowing through the outer passage and the movable valve object, wherein
the baffle component is a cylindrical component uninterruptedly surrounding an outer circumferential surface of the movable valve object,
the baffle component extends from the cover in an axial direction of the movable valve object, and
the cover has an opening which is open for introducing and discharging fuel relative to a space on an inner side of the baffle component in the radial direction.

US Pat. No. 10,578,063

RELIEF VALVE AND FUEL SUPPLYING SYSTEM

DENSO CORPORATION, Kariy...

1. A relief valve for a fuel supplying system that pumps fuel from a fuel pump to supply the fuel toward an internal combustion engine, wherein the relief valve releases a pressure of supply fuel, which is directed to the internal combustion engine, to an outside, the relief valve comprising:an inlet portion that receives the fuel, which is branched from a supply flow of the fuel directed to the internal combustion engine;
an outlet portion that outputs the fuel, which is inputted into the inlet portion, to the outside;
a connecting portion that is connected to the inlet portion and the outlet portion;
a valve element that is reciprocatable toward both of an upstream side and a downstream side in an inside of the connecting portion, wherein:
the valve element blocks a fuel flow from an inside of the inlet portion to an inside of the outlet portion in a valve closing state, in which the valve element is seated against a valve seat formed in the inlet portion or the connecting portion; and
the valve element enables the fuel flow from the inside of the inlet portion to the inside of the outlet portion in a valve opening state, in which the valve element is lifted from the valve seat; and
a resilient member that is received in the inside of the connecting portion and urges the valve element toward the valve seat, which is located on an upstream side of the valve element, wherein:
the valve element includes:
a loosely insertable wall portion that is loosely inserted in the inside of the connecting portion on a downstream side of the valve seat and communicates a first communication passage, which is formed between the loosely insertable wall portion and the connecting portion, to the inside of the inlet portion in the valve opening state;
a fittable tubular portion that is fitted to the inside of the connecting portion on a downstream side of the loosely insertable wall portion and is slidably supported by the connecting portion; and
a projecting annular portion that projects from the fittable tubular portion toward a radially inner side of the fittable tubular portion, so that a second communication passage, which is communicated with the first communication passage, is formed by the projecting annular portion to extend from a location between the projecting annular portion and the loosely insertable wall portion to a radially inner side of the projecting annular portion;
the loosely insertable wall portion, the fittable tubular portion and the projecting annular portion of the valve element are integrally reciprocatable relative to the inlet portion, the outlet portion and the connecting portion toward both of the upstream side and the downstream side;
the outlet portion projects into the fittable tubular portion on the radially inner side of the fittable tubular portion at a location on a downstream side of the projecting annular portion, so that the outlet portion is communicated with the second communication passage;
the resilient member is located on a radially outer side of the outlet portion and on the radially inner side of the fittable tubular portion and is engaged to the projecting annular portion located on an upstream side of the resilient member;
the resilient member is interposed between the outlet portion and the fittable tubular portion in a radial direction;
the loosely insertable wall portion, the fittable tubular portion and the projecting annular portion of the valve element are joined together, and
the loosely insertable wall portion, the fittable tubular portion and the projecting annular portion of the valve element are formed integrally in one piece.

US Pat. No. 10,890,146

FUEL SUPPLY APPARATUS

KYOSAN DENKI CO., LTD., ...

1. A fuel supply apparatus that supplies fuel from a fuel tank in a vehicle, the fuel supply apparatus comprising:a fuel pump transversely arranged inside the fuel tank to discharge fuel sucked from a suction port;
a filter element that defines an inner space communicated with the suction port inside the fuel tank to filter the fuel passing toward the inner space;
a pressure regulating valve configured to regulate a pressure of fuel discharged from the fuel pump; and
a passage element that defines an inner passage inside the fuel tank to introduce the fuel from the inner space into the suction port through the inner passage, wherein
the suction port is located to be deviated toward one end of the filter element in a specific lateral direction which is parallel to a tank lid,
the inner passage is communicated with the inner space,
the inner passage extends from the suction port toward a center of the filter element in the specific lateral direction,
the pressure regulating valve is located adjacent to a discharge port directly connected to the fuel pump, and
the fuel pump is arranged such that a longitudinal direction of the fuel pump is coincident with the specific lateral direction.

US Pat. No. 11,112,020

FUEL CONTROL VALVE

KYOSAN DENKI CO., LTD., ...


1. A fuel control valve comprising:a case that provides a passage extending from a tank for storing fuel;
a movable body movably housed in the case to open or close the passage;
a valve seat surface defined in the case to have an inner cone shape whose inner diameter increases toward a tip;
a valve element surface that is operable by the movable body, the valve element surface being in contact with the valve seat surface along a seal line in a valve closed state, the valve element surface being separated from the valve seat surface in a valve open state;
a plurality of grooves disposed between the tip and the seal line to expand radially outside from the valve seat surface; and
a plurality of projections that are defined between the grooves to intermittently leave the valve seat surface, wherein
the movable body includes a needle part extending toward the valve seat surface,
the valve element surface is defined at a tip part of the needle part, and
the valve seat surface left on the plurality of projections guides the valve element surface at the tip part of the needle part.

US Pat. No. 10,967,733

FUEL SHUTOFF VALVE

KYOSAN DENKI CO., LTD., ...

1. A fuel shutoff valve comprising:a valve configured to open or close an air passage of a fuel tank;
a float floating on fuel and moving in a valve closing direction to close the valve, or moving in a valve opening direction opposite to the valve closing direction to open the valve; and
an auxiliary member having a predetermined weight, the auxiliary member abutting on the float to apply a weight on the float in the valve opening direction, or separating from the float not to apply the weight on the float in the valve closing direction, wherein
the float has
an outermost diameter portion, and
an inner diameter portion smaller than the outermost diameter portion in diameter,
the auxiliary member is surrounding the outermost diameter portion of the float in a radial direction, and
the auxiliary member is provided with the valve and the float to separate from the float and abut on the valve to apply the weight on the valve in the valve closing direction.

US Pat. No. 11,097,611

VENT CONTROL VALVE FOR FUEL TANK

KYOSAN DENKI CO., LTD., ...


1. A vent control valve for a fuel tank, that is adapted to control a ventilation between the fuel tank and an outside, the vent control valve comprising:a first case shaped in a tube that forms a passage for ventilation;
a movable valve object arranged in the first case to open and close the passage, the movable valve object being inserted in the first case from a lower end opening of the first case;
an inner case arranged in the first case to support the movable valve object, the inner case being inserted in the first case from the lower end opening of the first case;
a second case disposed at a lower end of the first case;
a first connector disposed between the first case and the inner case, the first connector connecting the first case and the inner case with each other; and
a second connector disposed between the first case and the second case, the second connector connecting the first case and the second case with each other, wherein
the first connector and the second connector are disposed to separate from each other in an axial direction of the first case,
the first case hasa large diameter part including the lower end,
a small diameter part having a diameter smaller than that of an inner diameter of the large diameter part, the small diameter part being coaxial with the large diameter part, and
a stepped part disposed between the large diameter part and the small diameter part, along an axial direction of the first case,

the first connector is disposed in the small diameter part,
the second connector is disposed in the large diameter part, and
the first case and the inner case are separable from each other at the first connector, and the first case and the second case are separable from each other at the second connector.