Patents by Inventor John R. Twomey

John R. Twomey has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10499977
    Abstract: A method of surgery utilizing an end effector assembly having first and second jaw members defining a grasping area therebetween and a tissue-treating area therebetween. Each of the first and second jaw members defines a knife channel positioned within the grasping area and outside of the tissue-treating area. The end effector assembly is positioned such that the knife channels are positioned adjacent tissue to be removed. Thereafter, the first and/or second jaw members are moved from a spaced-apart position to an approximated position to grasp tissue therebetween, the jaw members are energized for conducting energy through tissue disposed within the tissue-treating area to treat tissue disposed within the tissue-treating area, and a knife is advanced through the knife channels to cut tissue adjacent the tissue-treating area thereby separating tissue.
    Type: Grant
    Filed: July 8, 2015
    Date of Patent: December 10, 2019
    Assignee: Covidien LP
    Inventors: David J. Van Tol, Gary M. Couture, Robert M. Sharp, John R. Twomey, Barry J. Kaup
  • Publication number: 20190357929
    Abstract: A forceps includes an end effector assembly including first and second jaw members, a blade, a lever member operably coupled to the end effector, a trigger member operably coupled to the blade and defining an actuation path therealong. A trigger safety member is pivotably coupled to the lever member such that, when the lever member is disposed in an initial position, the trigger safety member is disposed in a position blocking the trigger member. When the lever member is disposed in a compressed position, the trigger safety member is disposed in a position, wherein the trigger safety member is displaced from the actuation path to permit movement of the trigger member, wherein the safety member rotates relative to the lever member as a function of movement of the lever member to block/unblock the trigger member.
    Type: Application
    Filed: August 12, 2019
    Publication date: November 28, 2019
    Inventor: JOHN R. TWOMEY
  • Patent number: 10478243
    Abstract: A method of surgery includes grasping tissue between tissue-contacting surfaces of first and second jaw members of an end effector assembly, supplying energy to at least one of the tissue-contacting surfaces to treat tissue grasped therebetween, and translating and/or manipulating the end effector assembly to cut tissue in a ripping fashion.
    Type: Grant
    Filed: July 9, 2015
    Date of Patent: November 19, 2019
    Assignee: COVIDIEN LP
    Inventors: Gary M. Couture, Ryan C. Artale, John R. Twomey, Rebecca J. Coulson, David J. Van Tol
  • Publication number: 20190328377
    Abstract: A tissue specimen removal device comprises a specimen bag; a flexible ring, the flexible ring configured to form a top opening of the specimen bag; a cannula assembly comprising: an inner tube portion and an outer tube portion. The device may further comprise a connector carrier, the connector carrier configured to retain at least one connector housing, the at least one connector housing comprising one or more connector portions and reside within an interior of the connector carrier, and wherein the connector carrier can be moved from a position within the cannula assembly to outside the cannula assembly.
    Type: Application
    Filed: April 11, 2019
    Publication date: October 31, 2019
    Inventors: Dirk Johnson, William N. Gregg, John R. Twomey, Ryan C. Artale
  • Publication number: 20190321950
    Abstract: A method of disassembling a surgical instrument includes obtaining a surgical instrument including a housing, an input shaft defining an axis and extending from the housing, and a paddle engaged with the input shaft and configured to pivot about the axis. The method further includes disengaging a cover plate of the paddle from a body of the paddle by providing a force to the cover plate substantially in a direction parallel to the axis and disengaging the body from the input shaft by providing a force to the body substantially in a direction parallel to the axis.
    Type: Application
    Filed: April 24, 2018
    Publication date: October 24, 2019
    Inventors: JOHN R. TWOMEY, JAMES D. ALLEN, IV
  • Publication number: 20190321930
    Abstract: A method of sharpening a cutting edge of a knife of a surgical instrument includes manipulating an end effector assembly of a surgical instrument such that first and second jaw members of the end effector assembly are disposed in a spaced-apart position, retaining the first and second jaw members in the spaced-apart position, advancing a knife of the surgical instrument to an extended position wherein the knife extends between the first and second jaw members, retaining the knife in the extended position, and sharpening a cutting edge of the knife.
    Type: Application
    Filed: April 24, 2018
    Publication date: October 24, 2019
    Inventors: JOHN R. TWOMEY, JAMES D. ALLEN, IV
  • Patent number: 10405874
    Abstract: A surgical instrument is provided. The surgical instrument includes a housing. A movable handle is coupled to the housing and is configured to approximate a pair of jaw members toward and away from one another. A latch mechanism operably couples to the movable handle and includes one or more mechanical interfaces configured to selectively engage a corresponding mechanical interface disposed within the housing to lock and unlock the jaw members in an approximated configuration. When the movable handle is in a jammed position, the mechanical interface(s) of the latch mechanism is/are configured to deform and separate from the corresponding mechanical interface disposed within the housing when the movable handle is moved from the jammed position.
    Type: Grant
    Filed: May 2, 2014
    Date of Patent: September 10, 2019
    Assignee: COVIDIEN LP
    Inventors: John R. Twomey, Jessica E. C. Olson, Grant T. Sims, Loren Toth, Monte S. Fry, Michael B. Lyons
  • Patent number: 10383649
    Abstract: A forceps includes an end effector assembly including first and second jaw members, a blade, a lever member operably coupled to the end effector, a trigger member operably coupled to the blade and defining an actuation path therealong. A trigger safety member is pivotably coupled to the lever member such that, when the lever member is disposed in an initial position, the trigger safety member is disposed in a position blocking the trigger member. When the lever member is disposed in a compressed position, the trigger safety member is disposed in a position, wherein the trigger safety member is displaced from the actuation path to permit movement of the trigger member, wherein the safety member rotates relative to the lever member as a function of movement of the lever member to block/unblock the trigger member.
    Type: Grant
    Filed: July 31, 2015
    Date of Patent: August 20, 2019
    Assignee: COVIDIEN LP
    Inventor: John R. Twomey
  • Patent number: 10327834
    Abstract: A method for manufacturing an end effector assembly includes providing first and second jaw members moveable relative to one another about a pivot between a first, spaced-apart position and a second, approximated position. One of the first and second jaw members includes a cavity defined therein and the other of the first and second jaw members includes a stop member configured to be inserted into the cavity. A gap-setting gauge is grasped between the first and second jaw members to define a gap-distance between the jaw members equivalent to a thickness of the gap-setting gauge. The first and second jaw members are set such that the jaw members are prevented from approximation beyond the gap-distance.
    Type: Grant
    Filed: December 15, 2015
    Date of Patent: June 25, 2019
    Assignee: COVIDIEN LP
    Inventors: Joanna Ackley, James D. Allen, IV, Ryan C. Artale, Kim V. Brandt, Dennis W. Butcher, Edward M. Chojin, Gary M. Couture, James S. Cunningham, David M. Garrison, Keir Hart, Russell D. Hempstead, Glenn A. Horner, Daniel A. Joseph, Duane E. Kerr, Dylan R. Kingsley, Peter M. Mueller, Jessica E. C. Olson, Sean T. O'Neill, Jason T. Sanders, Robert M. Sharp, John R. Twomey, Jeffrey R. Unger
  • Publication number: 20190175254
    Abstract: An electrosurgical system for removing tissue is provided. The electrosurgical system includes an electrosurgical device for treat tissue and a grasping device configured to grasp tissue. The electrosurgical device has one or more electrically conductive surfaces adapted to electrically couple to a first electrical potential of an electrosurgical energy source. The grasping device includes one or more electrically conductive surfaces adapted to electrically couple to a second electrical potential of the electrosurgical energy source wherein, upon activation of the electrosurgical energy source, electrosurgical energy is transmitted between electrical potentials and through tissue disposed therebetween.
    Type: Application
    Filed: January 9, 2019
    Publication date: June 13, 2019
    Inventor: JOHN R. TWOMEY
  • Patent number: 10278773
    Abstract: A spindle assembly of a surgical instrument includes a body and a cutter pin. The body has at least one wall forming first and second channels therein. The cutter pin is disposed within the second channel and operably coupled to a knife rod extending therethrough and is operatively coupled at its distal end to a knife. When the knife rod is moved between a retracted position and a deployed position, the spindle assembly is moved between a first and a second position along the shaft. The cutter pin is configured to deform and exit the body when the knife is deployed and disposed in a trapped condition and in response to an applied force, thereby decoupling the knife from the spindle assembly.
    Type: Grant
    Filed: July 30, 2018
    Date of Patent: May 7, 2019
    Assignee: COVIDIEN LP
    Inventor: John R. Twomey
  • Patent number: 10231772
    Abstract: An electrosurgical instrument includes a housing including an elongated shaft. A stationary actuation member is axially disposed within the elongated shaft and includes a cam pin. An actuating mechanism is operably coupled to the elongated shaft and is moveable relative to the housing to selectively cause movement of the elongated shaft. An end effector includes a pair of opposing first and second jaw members operably coupled about a common pivot. One or both of the jaw members includes a camming slot configured to engage the cam pin. Each jaw member includes an electrically conductive tissue sealing surface adapted to connect to a source of electrosurgical energy. A knife blade is supported in the elongated shaft and moveable in a longitudinal direction to cut tissue disposed between the jaw members. A wire retention unit is supported within the housing and includes a plurality of wire clasps and a plurality of guide ribs configured to define at least one wire path.
    Type: Grant
    Filed: July 2, 2014
    Date of Patent: March 19, 2019
    Assignee: COVIDIEN LP
    Inventors: Terry M. Duffin, John R. Twomey, Jessica E. C. Olson, Grant T. Sims, Kenneth E. Netzel, Monte S. Fry, Daniel Mercier
  • Publication number: 20180333200
    Abstract: A spindle assembly of a surgical instrument includes a body and a cutter pin. The body has at least one wall forming first and second channels therein. The cutter pin is disposed within the second channel and operably coupled to a knife rod extending therethrough and is operatively coupled at its distal end to a knife. When the knife rod is moved between a retracted position and a deployed position, the spindle assembly is moved between a first and a second position along the shaft. The cutter pin is configured to deform and exit the body when the knife is deployed and disposed in a trapped condition and in response to an applied force, thereby decoupling the knife from the spindle assembly.
    Type: Application
    Filed: July 30, 2018
    Publication date: November 22, 2018
    Inventor: JOHN R. TWOMEY
  • Publication number: 20180325584
    Abstract: A method of surgery includes grasping tissue between tissue-treating plates of first and second jaw members. One or both of the jaw members includes a bifurcated body having first and second jaw components. Each jaw component includes a tissue-treating plate portion disposed thereon. The tissue-treating plate portions cooperate to define the tissue-treating plate of the jaw member. The method further includes energizing the tissue-treating plates of the first and second jaw members for conducting energy through grasped tissue to treat grasped tissue and separating grasped and treated tissue by rotating at least one of the first and second jaw components of the at least one jaw member relative to the other from an aligned orientation, wherein the tissue-treating plate portions are substantially co-planar relative to one another, to an angled orientation, wherein the tissue-treating plate portions are angled relative to one another.
    Type: Application
    Filed: July 24, 2018
    Publication date: November 15, 2018
    Inventor: JOHN R. TWOMEY
  • Publication number: 20180325552
    Abstract: A colpotomy system includes a colpotomy cup that extends to a distal surface and defines a longitudinal axis. The colpotomy system further includes a cutter operably coupled to the colpotomy cup and configured to travel along an arcuate path defined about the distal surface of the colpotomy cup. The cutter actuatable to separate a uterus from a vagina as the cutter rotates about the longitudinal axis of the colpotomy cup.
    Type: Application
    Filed: May 12, 2017
    Publication date: November 15, 2018
    Inventors: JASON G. WEIHE, JAMES D. ALLEN, IV, ANSEL DOW, THOMAS E. DROCHNER, STUART R. HART, MICHAEL B. LYONS, SCOTT J. PRIOR, JOHN R. TWOMEY
  • Publication number: 20180325575
    Abstract: A colpotomy system includes an energy source and a uterine manipulator that is electrically coupled to the energy source. The uterine manipulator supports a colpotomy cup and extends to a conductive distal tip portion. The colpotomy cup includes a conductive surface. One or both of the conductive distal tip portion and the conductive surface of the colpotomy cup are configured to return monopolar energy to the energy source.
    Type: Application
    Filed: April 13, 2018
    Publication date: November 15, 2018
    Inventors: NIKOLAI D. BEGG, JASON G. WEIHE, JAMES D. ALLEN, IV, ANSEL DOW, THOMAS E. DROCHNER, STUART R. HART, MICHAEL B. LYONS, SCOTT J. PRIOR, JOHN R. TWOMEY
  • Patent number: 10045812
    Abstract: A method of surgery includes grasping tissue between tissue-treating plates of first and second jaw members by moving the first and second jaw members from a spaced-apart position to a first approximated position, energizing the tissue-treating plates to conduct energy through the grasped tissue to treat tissue, and separating grasped and treated tissue by moving the first and second jaw members from the first approximated position to a second approximated position. Moving the first and second jaw members from the first approximated position to the second approximated position laterally shifts the jaw members relative to one another from an aligned orientation, wherein the tissue-treating plates are aligned with one another, to an offset orientation, wherein the tissue-treating plates are offset relative to one another.
    Type: Grant
    Filed: June 12, 2015
    Date of Patent: August 14, 2018
    Assignee: COVIDIEN LP
    Inventor: John R. Twomey
  • Patent number: 10045816
    Abstract: A spindle assembly of a surgical instrument includes a body and a cutter pin. The body has at least one wall forming first and second channels therein. The cutter pin is disposed within the second channel and operably coupled to a knife rod extending therethrough and is operatively coupled at its distal end to a knife. When the knife rod is moved between a retracted position and a deployed position, the spindle assembly is moved between a first and a second position along the shaft. The cutter pin is configured to deform and exit the body when the knife is deployed and disposed in a trapped condition and in response to an applied force, thereby decoupling the knife from the spindle assembly.
    Type: Grant
    Filed: December 19, 2016
    Date of Patent: August 14, 2018
    Assignee: COVIDIEN LP
    Inventor: John R. Twomey
  • Publication number: 20180206908
    Abstract: A forceps includes an end effector assembly having a stop and a plurality of overmold teeth within at least one jaw member. One (or both) of the jaw members is moveable relative to the other between a spaced-apart position and an approximated position for grasping tissue therebetween. One (or both) of the jaw members includes a stop molded within an insulative housing, and an insulator plate with the overmold teeth formed from plastic. The overmold teeth extend through openings within a sealing plate and protrude past the tissue sealing surface of the sealing plate. The stop primarily controls the gap distance between opposing jaw members by bearing most of an applied load and the overmold teeth assist in controlling the gap distance by bearing the remaining applied load.
    Type: Application
    Filed: March 21, 2018
    Publication date: July 26, 2018
    Inventors: JOHN R. TWOMEY, DYLAN R. KINGSLEY, JAMES D. ALLEN, IV, SEAN T. O'NEILL, JEFFREY M. ROY
  • Patent number: 9974555
    Abstract: A surgical instrument includes a pair of jaw members moveable between a spaced-apart and an approximated position. A drive bar is translatable between a distal and a proximal position for moving the jaw members between the spaced-apart and approximated positions. A lever is moveable between an initial position and an actuated position for translating the drive bar between the distal and proximal positions. A sleeve disposed about the drive bar includes an annular track having a substantially radial segment(s) and a substantially longitudinal segment(s). A collar interdisposed between the sleeve and the drive bar includes a stop member(s) extending radially outwardly therefrom. The stop member(s) is engaged within the track and is translatable from a first position, wherein the stop member is positioned within the longitudinal segment, to a second position, wherein the stop member is engaged within the radial segment, to lock the lever in the actuated position.
    Type: Grant
    Filed: October 22, 2015
    Date of Patent: May 22, 2018
    Assignee: COVIDIEN LP
    Inventors: John R. Twomey, Russell D. Hempstead, Keir Hart