US Pat. No. 9,480,495

SURGICAL KNIFE SAFETY HANDLE HAVING USER OPERABLE LOCK

Beaver-Visitec Internatio...

1. A method for shielding a knife blade in a safety handle having a handle body with a distal end, a proximal end and a slot
extending along a portion of a longitudinal handle body axis and having at least one detent adjacent to said slot, and having
a knife holder at said distal end for carrying said knife blade, and a guard, the method comprising the steps of:
depressing a user control mechanism disposed upon a cantilever, wherein said cantilever is secured only at its proximal end
to a positioning mechanism movably disposed relative to said handle body, said user control mechanism extending from within
said handle body via said slot;

wherein said detent is configured to releasably secure at least one of said knife holder and said guard at a position with
respect to said handle body, and depressing said user control mechanism releases said cantilever from said detent and releases
at least one of said knife holder and said guard with respect to said handle body; and

moving said user control mechanism along said slot to selectively cover or expose said knife blade relative to a guard, said
guard having a contoured distal end to facilitate handle orientation and control.

US Pat. No. 9,095,322

SPECULUM WITH HINGED PORTION

Beaver-Visitec Internatio...

1. A speculum comprising:
a first arm having distal and proximal ends, a first channel formed thereon at said distal end adapted to a shape of an eyelid;
a second arm having distal and proximal ends, a second channel formed thereon at said distal end adapted to a shape of an
eyelid;

a hinge connected to said first and second arms, said hinge permitting said first and second arms to selectively rotate about
an axis of rotation, said selective rotation causing said first and second channels to selectively move closer and farther
apart;

a first element on said first arm, said first element including a plurality of teeth; and,
a second element on said second arm, said second element including a pointer formed to nest within a recess defined between
adjacent ones of said plurality of teeth,

wherein said first and second elements are configured to cooperatively retain said first and second arms in select rotational
positions with interfering interengagement between said first and second elements limiting said selective rotation of said
first and second arms,

wherein a slot is defined in said second arm to partially separate a first portion of said second arm from a second portion
of said second arm, said first portion being displaceable away from said second portion, said second element being located
on said first portion, said proximal end of said second arm being located on said first portion, said interfering interengagement
being defined with at least a portion of said first element extending across a portion of said slot and with said pointer
being nested in said recess,

wherein said second arm includes a connecting portion extending between, and connecting, said first and second portions, said
connecting portion acting as a fulcrum for permitting rotation of said first portion relative to said second portion in the
displacement of said first portion relative to said second portion, the displacement of said first portion away from said
second portion causing said slot to widen, and

wherein a stop member extends from said second portion configured to limit the rotation of said first portion relative to
said second portion about said connecting portion in the displacement of said first portion away from said second portion,
said stop member extending from an area of an outer edge of said second arm away from said first arm, said area being located
on said second portion between said first portion and said distal end of said second arm.

US Pat. No. 9,044,265

RETRACTABLE SAFETY KNIFE

Beaver-Visitec Internatio...

1. A surgical knife safety handle, comprising:
a handle portion having a longitudinal axis, the handle portion comprising a distal end, a proximal end and a housing extending
along the longitudinal axis between the distal and proximal ends, the housing having a generally circular opening through
which a blade selectively extends, the housing defining a chamber therein and having at least one slot extending along the
longitudinal axis accessing the chamber, the housing comprising first engagement structures disposed adjacent to proximal
and distal ends of the slot, the first engagement structures being formed as respective pairs disposed on opposing transverse
sides of the slot; and

a pusher for carrying a blade at the distal end of the handle portion, the pusher comprising:
a main portion having a rounded cross-sectional shape that substantially conforms to the chamber; and
a user control mechanism extending from within the chamber via the slot for allowing a user to longitudinally move the pusher
to selectively expose or at least partially cover the blade, the user control mechanism comprising:

a button depressible relative to the handle portion, the button having a user contact portion that is narrower than the slot
in the transverse direction; and

a pair of second engagement structures disposed on lateral sides of the button for engagement with the first engagement structures
to substantially secure the pusher in a first locking position in which the blade is fully extended and a second locking position
in which the blade is at least partially covered, wherein the first and second locking positions define the limits of pusher
travel when the button is disposed in the slot, and wherein in the first locking position, a proximal end of the pusher is
laterally surrounded by the handle portion;

wherein a distal-most portion of the slot extends distally beyond the first engagement structures that are disposed adjacent
to the distal end of the slot, and a proximal-most portion of the slot extends proximally beyond the first engagement structures
that are disposed adjacent to the proximal end of the slot.

US Pat. No. 9,579,094

IRIS EXPANDER

Beaver-Visitec Internatio...

1. An iris expander for acting against a margin of an iris of a patient's eye in causing expansion of the iris, the iris expander
comprising:
a closed-loop, multi-segmented body which is expandable from a first state to a second state, said second state defining a
larger footprint than said first state, said body being defined by a plurality of segments connected by hinges, at least one
aperture, spaced from said hinges, being formed in a first of said segments with a channel extending therefrom into a portion
of said first segment, said channel being embedded in said first segment such that no portion thereof is exposed externally
of said first segment, wherein, with the iris expander acting against the margin of the iris of the patient's eye, said channel
being formed to accommodate a portion of an instrument inwardly of the margin of the iris without the accommodated portion
of the instrument contacting the iris.

US Pat. No. 10,258,367

SURGICAL KNIFE SAFETY HANDLE

Beaver-Visitec Internatio...

1. A surgical knife safety handle, comprising:a handle body having a longitudinal axis, said handle body having a patterned nonslip surface;
a knife holder for carrying a knife blade at a distal end of said handle body;
a guard, having an enlarged distal end which extends radially upward from a top side of said guard beyond an outer circumference of a proximal end of said guard to facilitate user contact with said enlarged distal end for handle orientation and control, said top side of said guard having a patterned non-slip surface, said guard also having a bottom portion, opposite to said top side, and extending from and connecting lateral sides of the enlarged distal end to provide said guard with a continuous circumferential portion, said bottom portion having a patterned nonslip surface disposed distally of and adjoining a proximal shoulder, and a cutout extending proximally from said proximal shoulder;
wherein said guard is configured to at least partially enclose said knife blade carried by said knife holder, said guard being longitudinally moveable with respect to said handle body between an exposed position exposing said knife blade and a covered position covering said knife blade; and
a positioning element having a textured user-interface portion and extending radially upward from the top side of said guard, said positioning element being configured to allow a user to longitudinally move said guard to selectively expose or cover said knife blade;
wherein in the exposed position, a proximal-most end of said patterned nonslip surfaces of said handle body and said top side of said guard are in circumferential alignment such that a plane that is perpendicular to the longitudinal axis of the handle body at the proximal-most end of said patterned non-slip surface of the handle body extends though the top side of said guard; and
wherein in the exposed position, the positioning element is located proximal to the proximal end of said patterned non-slip surface of the handle body.

US Pat. No. 10,271,872

SURGICAL KNIFE SAFETY HANDLE

Beaver-Visitec Internatio...

1. A surgical knife safety handle, comprising:a handle body having a longitudinal axis;
a knife holder affixed to said handle body and carrying a knife blade at a distal end of said handle body;
a guard longitudinally movable with respect to said handle body between extended and retracted positions, said guard having a distal portion configured to at least partially cover said knife blade when said guard is in said extended position and to expose said knife blade for use when said guard is in said retracted position, said guard further having a proximal portion, each of said distal and proximal portions of said guard being at least partially external to said handle body in both the extended and retracted positions of said guard; and
a protrusion extending externally from said guard to be engageable by a user, said protrusion being carried by said guard for allowing a user to longitudinally move said guard between said extended and retracted positions to selectively cover or expose said knife blade;
wherein said distal portion of said guard is configured to adjoin said handle body when said guard is in said retracted position;
wherein where said handle body and said guard adjoin, said guard has, an outermost circumference substantially the same as an outermost circumference of said handle body thereby providing a circumferential outer surface with said handle body when said guard is in said retracted position, said guard and said, handle body each having a surface with a pattern, a rearmost portion of said guard pattern being in radially circumferential alignment with a rearmost portion of said handle body pattern when said guard is in said retracted position;
wherein said guard is releasably lockable in said extended and retracted positions, and said protrusion is depressible by a user to release the locking of said guard at said extended and retracted positions; and
wherein said guard carries a spring to assist in locking said guard at said extended and retracted positions, said spring being connected at distal and proximal ends thereof to internal structures of said guard.

US Pat. No. 10,117,703

METHOD OF, AND DEVICE FOR, MARKING A PATIENTS EYE FOR REFERENCE DURING A TORIC LENS IMPLANTATION PROCEDURE

BEAVER-VISITEC INTERNATIO...

1. An electrocautery device for marking a patient's eye, the device comprising:a handle;
a shaft extending from said handle, said shaft having a gauge in the range of 25-27; and,
a conical tip defined at a terminus of said shaft,
wherein, said conical tip being tapered so as to include a tip angle in the range of 60°-120° for forming one or more points of cauterization on the patient's eye, a vertex of said tip angle being centrally located relative to a cross-section of said shaft, and
wherein, said conical tip including an exposed inner conductive wire coinciding with said vertex of said tip angle, an outer tube, and an exposed insulation layer between said inner conductive wire and said outer tube.

US Pat. No. 10,433,828

IRIS EXPANDER

Beaver-Visitec Internatio...

1. An iris expander comprising:a non-metallic, unitary, multi-segmented body which is expandable from a first state to a second state, said second state defining a larger footprint than said first state, said body being a closed loop defined by a plurality of segments connected by living hinges, said body having an inwardly-facing inner surface and an outwardly-facing outer surface, wherein said living hinges being formed by sections of said body between said segments which are thinner between said inner surface and said outer surface than adjacent portions of said body, wherein said body includes a first lobe, radially spaced from said living hinges, protruding from a first of said segments, said first lobe protruding outwardly from said outer surface of said first segment, and, wherein said body includes at least one aperture, radially spaced from said living hinges, being formed in said first segment with a channel extending therefrom into a portion of said first segment, said channel being spaced inwardly of both said inner surface and said outer surface and located within a portion of said first segment from which said first lobe protrudes.

US Pat. No. 10,357,279

SURGICAL KNIFE SAFETY HANDLE HAVING USER OPERABLE LOCK

Beaver-Visitec Internatio...

1. A method for shielding a knife blade in a safety handle having a handle body with a distal end, a proximal end and a slot extending along a portion of a longitudinal handle body axis and having at least one detent adjacent to the slot, the safety handle also having a knife holder for carrying the knife blade, and a guard portion, the method comprising the steps of:depressing a user control mechanism disposed upon a cantilever, wherein the cantilever is secured only at its proximal end to a positioning mechanism movably disposed relative to the handle body, the user control mechanism extending from within the handle body via the slot;
wherein the detent is configured to releasably secure at least one of the knife holder and the guard portion at a position with respect to the handle body, and depressing the user control mechanism releases the cantilever from the detent and releases at least one of the knife holder and the guard portion with respect to the handle body; and
moving the user control mechanism along the slot to selectively cover or expose the knife blade relative to the guard portion.

US Pat. No. 11,109,886

SURGICAL KNIFE SAFETY HANDLE HAVING USER OPERABLE LOCK

Beaver-Visitec Internatio...


1. A method for shielding a knife blade in a safety handle having a handle body with a distal end, a proximal end and a slot extending along a portion of a longitudinal handle body axis and having at least one detent adjacent to the slot, the safety handle also having a knife holder for carrying the knife blade, and a guard positioning mechanism movably disposed within the handle body, the guard positioning mechanism having a guard portion, the method comprising the steps of:depressing a user control mechanism disposed upon a cantilever, wherein the cantilever is secured only at its proximal end to the guard positioning mechanism, the user control mechanism extending outwardly from the handle body via the slot;
wherein the cantilever releasably engages the detent to releasably secure at least one of the knife holder and the guard portion at a position with respect to the handle body, and depressing the user control mechanism releases the cantilever from the detent to allow relative movement between the guard positioning mechanism and the handle body; and
moving the user control mechanism along the slot to selectively cover or expose the knife blade relative to the guard portion.

US Pat. No. 11,096,823

OPHTHALMIC MARKING DEVICE AND METHOD OF USING SAME

Beaver-Visitec Internatio...


1. A method of marking a patient's eye with reference marks for ophthalmic procedures, the method comprising:providing an ophthalmic marking device having:a handle having an enclosed body with a proximal end and a distal end with first and second contacts exposed therethrough;
a tip removably mountable to said distal end of said enclosed body of said handle;
an electrically conductive tip element at least partially within said tip, said tip element including spaced-apart first and second leads with an arched conductor extending therebetween in physical-direct contact with said first and second leads to define a closed electrical flow path between said first and second leads such that application of an electrical potential across said first and second leads results in electrical flow through said conductor, a first portion of said tip element protruding from said tip to be exposed, wherein said first and second contacts are configured to insertingly receive said first and second leads, and wherein said first and second leads each include a loop-shaped portion, said loop-shaped portions being received in said first and second contacts with sufficient interengagement therebetween to retain said conductive tip on said handle when mounted thereto; and,
an electrical power storage contained within the enclosed body, said electrical power storage being electrically connectable to said conductive tip element with said first and second leads received in said first and second contacts, respectively, with said tip removably mounted to said enclosed body, wherein, removal of said tip from enclosed body causes separation of said first and second leads from said first and second contacts,
wherein, said tip element and said electrical power storage are configured so that, with electrical flow through said tip element caused by said electrical power storage, heat is resistively generated in said tip element with temperature in the range of 250° F.-450° F. at said first portion of said tip element;

actuating said ophthalmic marking device to allow said electrical power storage to cause electrical flow through said tip element so that heat is resistively generated in said tip element with a temperature in the range of 250° F.-450° F. at said first portion of said tip element; and,
contacting a target site on a patient's eye to be marked with a reference mark with said first portion of said tip element and maintaining contact for at least one second with the temperature at said first portion of said tip element being in the range of 250° F.-450° F.