Patents by Inventor Warren P. Williamson, IV

Warren P. Williamson, IV 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: 6024741
    Abstract: A locking mechanism for ensuring proper sequential usage of a surgical instrument is provided for an instrument utilizing a tissue treating energy, particularly a tissue heating energy, such as, for example, electrosurgical, ultrasonic, thermal, laser, infrared light, or other heating energies. One embodiment includes a cutting element to be used after heat treatment of tissue is completed to a desired degree. The instrument of the preferred embodiment includes a feedback monitor arranged to provide a signal indicating completion of tissue treatment. One embodiment includes an electro-mechanical locking mechanism responsive to the tissue treatment complete feedback signal and arranged to unlock when tissue treatment is complete.
    Type: Grant
    Filed: March 5, 1997
    Date of Patent: February 15, 2000
    Assignee: Ethicon Endo-Surgery, Inc.
    Inventors: Warren P. Williamson, IV, David C. Yates
  • Patent number: 5972004
    Abstract: Wire fasteners having legs with lengths that can be one hundred times the width of the fastener are used to secure items, such as prosthesis valves to a patient during minimally invasive surgery. The fasteners are manipulated into position and then are immobilized by means of the legs thereof for tensioning, cutting and forming in situ. The fasteners are manipulated, tensioned and formed from the leg end of the fasteners. Tools for initially placing the fasteners and for immobilizing, tensioning, cutting and bending the fastener legs are disclosed. Once the fasteners are initially placed, the prosthesis is placed on the long legs of the placed fasteners and is guided into position on the legs. Once the prosthesis is in position, the legs of the fasteners are immobilized, tensioned, cut and bent into staple-like shapes to secure the prosthesis to the patient. A method for carrying out the procedure using the long fastener is also disclosed.
    Type: Grant
    Filed: February 20, 1998
    Date of Patent: October 26, 1999
    Assignee: CardioVascular Technologies, LLC.
    Inventors: Warren P. Williamson, IV, Paul A. Spence, George A. Keller, Cecil R. Robinson, Thomas J. Ward
  • Patent number: 5891160
    Abstract: A one-piece fastener or staple includes a base that contacts tissue and a prong that extends through the tissue. A suture lead is anchored to the base and a needle is attached to the suture lead. A tool positions the fastener adjacent to the tissue, and is operated to drive the prong and the suture needle through the tissue. The tool includes a needle grabber that is operated to grab the needle and pull the needle out of the patient. Since the suture lead is attached to the fastener, a prosthesis can be placed on the suture lead and pushed down to the tissue. A cassette is releasably mounted on the tool and contains the fastener, the suture lead and the suture needle. Alternative forms of the anchor have sutures attached to a base at locations that are spaced apart from each other, and sutures associated with each of two adjacent anchors can be tied together or sutures associated with a single anchor can be tied together. A suture threadably connected to an anchor can be used as a running suture.
    Type: Grant
    Filed: December 4, 1997
    Date of Patent: April 6, 1999
    Assignee: CardioVascular Technologies, LLC
    Inventors: Warren P. Williamson, IV, George T. Christakis, Paul Spence, Thomas Ward, Douglas P. Allen
  • Patent number: 5871135
    Abstract: A surgical stapler comprising at least one cam having a cam surface, an arrangement for actuating the cam for a longitudinal firing movement of the cam surface, a cartridge having a plurality of staple drive members driven by the longitudinal movement of the cam surface, and a plurality of surgical staples respectively associated with the staple drive members for being fired by the longitudinal movement of the cam surface. In one embodiment of the present invention, the staple drive members include at least a pair of alternating first and second staple drive members, the first staple drive member including a laterally spaced pair of staple driving surfaces, the second staple drive member including a single staple driving surface. The first and second staple drive members are disposed such that the staple driving surfaces thereof are arranged in laterally spaced three rows.
    Type: Grant
    Filed: June 13, 1996
    Date of Patent: February 16, 1999
    Assignee: Ethicon Endo-Surgery
    Inventors: Warren P. Williamson IV, Thomas W. Huitema, James H. Chambers
  • Patent number: 5868763
    Abstract: An anastomosis is performed using a mounting structure mounted on the outside of at least one vessel. The mounting structure includes a flexible mounting structure that is attached to the vessel by a special instrument. A graft vessel is attached to the mounting structure either directly or by means of another mounting structure attached to the graft vessel. Tools for attaching a mounting structure to a vessel are disclosed, and a tool for attaching two mounting structures together is also disclosed. Methods for carrying out the anastomosis according to the invention are also disclosed.
    Type: Grant
    Filed: September 16, 1996
    Date of Patent: February 9, 1999
    Assignee: Guidant Corporation
    Inventors: Paul A. Spence, Warren P. Williamson, IV, George Christakis
  • Patent number: 5817093
    Abstract: Query electrodes are provided for monitoring the electrical impedance of tissue as it is treated with electrosurgical energy. In one embodiment, based on a predicted model of tissue impedance and a number of initial impedance readings, the impedance at which tissue treatment is completed is predicted. More particularly, a minimum impedance level is measured and a function of the minimum impedance is used to determine impedance at which coagulation is completed. A control device is provided for bringing the output of the generator within an optimum range based on a system load curve. In one embodiment the impedance monitoring device is used in conjunction with a bipolar electrosurgical instrument. Preferably, the instrument comprises electrically opposite therapeutic electrodes, each located on one or more tissue engaging surfaces for engaging tissue to be treated, and electrically opposite query electrodes, located on one or more tissue engaging surfaces.
    Type: Grant
    Filed: November 4, 1996
    Date of Patent: October 6, 1998
    Assignee: Ethicon Endo-Surgery, Inc.
    Inventors: Warren P. Williamson, IV, David C. Yates
  • Patent number: 5817032
    Abstract: A tissue biopsy sample is placed on a tissue trapping and supporting material that can withstand tissue preparation procedures and which can be cut with a microtome. The tissue is immobilized on the material and the material and the tissue are subjected to a process for replacing tissue fluids with wax, and then the tissue and the supporting material are sliced for mounting on slides using a microtome. Harvesting devices and containers using the filter material are disclosed. An automated process is also disclosed. One form of the invention has the tissue trapping and supporting material porous and another form of the invention includes a tissue supporting material that is not easily microtomed.
    Type: Grant
    Filed: May 14, 1996
    Date of Patent: October 6, 1998
    Assignee: BioPath Automation LLC.
    Inventors: Warren P. Williamson, IV, Stephen P. Whitlach
  • Patent number: 5810811
    Abstract: An improved electro surgical instrument is provided for cauterization and/or welding of tissue of varying impedances, thicknesses and vascularity especially in the performance of endoscopic procedures. The instrument compresses the tissue between one pole of a bipolar energy source located on one interfacing surface, and a second interfacing surface. A second pole is located on one of the two interfacing surfaces. In a preferred embodiment, the second pole is located on the same interfacing surface as the first pole and an insulator electrically isolates the two poles. A preferred application of the invention is in a cutting instrument wherein a hemostatic line is formed along a cut line using RF energy.
    Type: Grant
    Filed: April 4, 1997
    Date of Patent: September 22, 1998
    Assignee: Ethicon Endo-Surgery, Inc.
    Inventors: David C. Yates, James W. Voegele, Jesse Kuhns, Anil Nalagatla, Warren P. Williamson IV, Steven H. Mersch, Martin Madden, Richard P. Nuchols
  • Patent number: 5807393
    Abstract: A locking mechanism for ensuring proper sequential usage of a surgical instrument is provided for an instrument utilizing a tissue treating energy, particularly a tissue heating energy, such as, for example, electrosurgical, ultrasonic, thermal, laser, infrared light, or other heating energies. One embodiment includes a cutting element to be used after heat treatment of tissue is completed to a desired degree. The instrument of the preferred embodiment includes a feedback monitor arranged to provide a signal indicating completion of tissue treatment. One embodiment includes an electro-mechanical locking mechanism responsive to the tissue treatment complete feedback signal and arranged to unlock when tissue treatment is complete.
    Type: Grant
    Filed: May 8, 1995
    Date of Patent: September 15, 1998
    Assignee: Ethicon Endo-Surgery, Inc.
    Inventors: Warren P. Williamson, IV, David C. Yates
  • Patent number: 5709680
    Abstract: An electrosurgical instrument is provided for cauterization and/or welding of tissue of varying impedances, thicknesses and vascularity especially in the performance of endoscopic procedures. The instrument compresses the tissue in the compression zone between first interfacing surface and second interfacing surfaces. The compression zone is formed by an insulator which forms a compression ridge in one of the interfacing surfaces and separates first and second electrically opposite electrodes. A preferred application of the invention is in a cutting instrument wherein a hemostatic line is formed using RF along a cut line.
    Type: Grant
    Filed: December 22, 1994
    Date of Patent: January 20, 1998
    Assignee: Ethicon Endo-Surgery, Inc.
    Inventors: David C. Yates, Jesse J. Kuhns, Warren P. Williamson, IV
  • Patent number: 5630541
    Abstract: A surgical stapler comprising at least one cam having a cam surface, an arrangement for actuating the cam for a longitudinal firing movement of the cam surface, a cartridge having a plurality of staple drive members driven by the longitudinal movement of the cam surface, and a plurality of surgical staples respectively associated with the staple drive members for being fired by the longitudinal movement of the cam surface. In one embodiment of the present invention, the staple drive members include at least a pair of alternating first and second staple drive members, the first staple drive member including a laterally spaced pair of staple driving surfaces, the second staple drive member including a single staple driving surface. The first and second staple drive members are disposed such that the staple driving surfaces thereof are arranged in laterally spaced three rows.
    Type: Grant
    Filed: December 21, 1994
    Date of Patent: May 20, 1997
    Assignee: Ethicon Endo-Surgery, Inc.
    Inventors: Warren P. Williamson, IV, Thomas W. Huitema, James H. Chambers
  • Patent number: 5562241
    Abstract: A surgical stapler instrument is provided for applying lateral lines of staples to tissue while cutting the tissue between those staple lines. The instrument includes a handle portion, an implement portion, a reciprocating section, a drive member and a movable actuator. The implement portion includes a staple cartridge and an anvil. The reciprocating section is adapted to move back and forth along an axis of the implement portion. The movable actuator is associated with the handle portion and is engaged with the drive member such that motion of the actuator causes the drive member to move back and forth between first and second drive positions separated by a first distance. A multiplier is further provided and is associated with the reciprocating section and the drive member for causing the reciprocating section to move back and forth between first and second reciprocating positions in response to movement of the drive member.
    Type: Grant
    Filed: November 7, 1995
    Date of Patent: October 8, 1996
    Assignee: Ethicon Endo-Surgery, Inc.
    Inventors: Bryan D. Knodel, Richard P. Nuchols, Warren P. Williamson, IV
  • Patent number: 5545179
    Abstract: An access assembly to provide access for surgical instruments during endoscopic surgical procedures and simultaneously seal the access opening when the instrument is withdrawn is disclosed. The assembly has a base, and an elastomeric sealing element and a tubular conduit. The base has a flange and a neck. The elastomeric sealing element has an inner elongated central channel which provides a passageway for surgical instruments into a body cavity. The sealing element also has an outer inflatable sleeve. When the space between the inner channel and outer sleeve is inflated, a distal balloon portion of the sleeve is inflated and the inner channel is compressed to constrict the inner channel passageway and therefore provide a seal.
    Type: Grant
    Filed: July 21, 1995
    Date of Patent: August 13, 1996
    Assignee: Ethicon Endo-Surgery, Inc.
    Inventor: Warren P. Williamson, IV
  • Patent number: 5525218
    Abstract: A centrifuge provides simplify access to the processing chamber. In one arrangement, the processing chamber separates into a bowl and spool element to receive a disposable processing bag. In another arrangement, the processing chamber pivots between an operating position and an access position to provide improved access. The centrifuge also employs readily accessible holders for releasably retaining tubing that, in use, conveys fluid to and from the chamber. Though greatly accessible, the centrifuge operates without the need of complicated rotating seals and expensive disposable components.
    Type: Grant
    Filed: November 4, 1994
    Date of Patent: June 11, 1996
    Assignee: Baxter International Inc.
    Inventors: Warren P. Williamson, IV, Richard I. Brown
  • Patent number: 5465895
    Abstract: A surgical stapler instrument is provided for applying lateral lines of staples to tissue while cutting the tissue between those staple lines. The instrument includes a handle portion, an implement portion, a reciprocating section, a drive member and a movable actuator. The implement portion includes a staple cartridge and an anvil. The reciprocating section is adapted to move back and forth along an axis of the implement portion. The movable actuator is associated with the handle portion and is engaged with the drive member such that motion of the actuator causes the drive member to move back and forth between first and second drive positions separated by a first distance. A multiplier is further provided and is associated with the reciprocating section and the drive member for causing the reciprocating section to move back and forth between first and second reciprocating positions in response to movement of the drive member.
    Type: Grant
    Filed: February 3, 1994
    Date of Patent: November 14, 1995
    Assignee: Ethicon Endo-Surgery, Inc.
    Inventors: Bryan D. Knodel, Richard P. Nuchols, Warren P. Williamson, IV
  • Patent number: 5452837
    Abstract: An improved surgical stapler is disclosed having a tissue gripping ridge on at least one of the tissue contacting surfaces. The tissue contact surfaces are preferably displayed on both the anvil and the cartridge surfaces of the surgical stapler. The tissue gripping ridges preferably have serrated surfaces which mesh when in contact with each other to hold the tissue.The preferred embodiment of this invention describes the tissue gripping ridges along the periphery of the anvil and cartridge tissue contact surfaces. Another embodiment describes the tissue gripping ridges adjacent to the longitudinal knife slot.
    Type: Grant
    Filed: December 5, 1994
    Date of Patent: September 26, 1995
    Assignee: Ethicon Endo-Surgery, Inc.
    Inventors: Warren P. Williamson, IV, Leo J. Nolan
  • Patent number: 5417361
    Abstract: A staple cartridge for a surgical stapler includes a staple drive member which is driven by longitudinal movement of a cam through the surgical stapler for firing at least one surgical staple. The staple drive member comprises a staple drive element having a staple driving surface in association with the surgical staple for angular orientation of the surgical staple, when applied, with respect to the direction of movement of the cam. The staple drive member further comprises a cam contact element having a cam contact surface for being engaged by the cam, and an arrangement for pivotally connecting the staple drive element to the cam contact element.
    Type: Grant
    Filed: August 19, 1994
    Date of Patent: May 23, 1995
    Assignee: Ethicon Endo-Surgery, Inc.
    Inventor: Warren P. Williamson, IV
  • Patent number: 5364003
    Abstract: A staple cartridge for a surgical stapler includes a staple drive member which is driven by longitudinal movement of a cam through the surgical stapler for firing at least one surgical staple. The staple drive member comprises a staple drive element having a staple driving surface in association with the surgical staple for angular orientation of the surgical staple, when applied, with respect to the direction of movement of the cam. The staple drive member further comprises a cam contact element having a cam contact surface for being engaged by the cam, and an arrangement for pivotally connecting the staple drive element to the cam contact element.
    Type: Grant
    Filed: May 5, 1993
    Date of Patent: November 15, 1994
    Assignee: Ethicon Endo-Surgery
    Inventor: Warren P. Williamson, IV
  • Patent number: 5362291
    Abstract: A drawer-mounted centrifuge provides easy access for loading and unloading disposable processing elements. The centrifuge also includes an umbilicus holder that moves between an operating position and an out-of-the-way position as the drawer opens and closes.
    Type: Grant
    Filed: February 9, 1994
    Date of Patent: November 8, 1994
    Assignee: Baxter International Inc.
    Inventor: Warren P. Williamson, IV
  • Patent number: 5360542
    Abstract: A centrifuge provides simplify access to the processing chamber. In one arrangement, the processing chamber separates into a bowl and spool element to receive a disposable processing bag. In another arrangement, the processing chamber pivots between an operating position and an access position to provide improved access. The centrifuge also employs readily accessible holders for releasably retaining tubing that, in use, conveys fluid to and from the chamber. Though greatly accessible, the centrifuge operates without the need of complicated rotating seals and expensive disposable components.
    Type: Grant
    Filed: November 2, 1993
    Date of Patent: November 1, 1994
    Assignee: Baxter International Inc.
    Inventors: Warren P. Williamson, IV, Richard I. Brown