Patents Represented by Attorney, Agent or Law Firm Gene Warzecha
  • Patent number: 5927956
    Abstract: A peristaltic pump tubing system for use with a peristaltic pump roller assembly in a surgical procedure. The system comprises a uniquely shaped disposable tubing cassette for retaining the tubing to be used during the surgical procedure and a uniquely shaped cassette holding station situated adjacent the peristaltic pump roller assembly. The cassette comprises a housing containing a flexible tube for engagement with the peristaltic rollers and having an open end to enable the cassette to be moved downwardly to place the tube in alignment with the plane in which the peristaltic rollers rotate. The cassette holding station is provided with a front panel extending in a plane parallel to the roller plane of rotation, the panel being spaced from the pump housing by a sufficient amount to create a pump roller station into which the cassette may fit.
    Type: Grant
    Filed: September 1, 1998
    Date of Patent: July 27, 1999
    Assignee: Linvatec Corporation
    Inventors: Joepert R. Lim, Brian J. Fox
  • Patent number: 5902306
    Abstract: A wire driver collet mechanism for selectively enabling the repositioning of a wire within a wire driver. The adjustable collet mechanism enables the wire to be repositioned under its own weight so that a user is not required to grasp the wire, thereby enabling one-handed operation of the wire driver. A method of adjusting a wire within a wire driver utilizes the steps of positioning the tip of a wire against a surface and allowing the wire to move under its own weight while moving the wire driver to position the wire as desired The release of the wire is under the control of the hand holding the wire driver.
    Type: Grant
    Filed: May 1, 1997
    Date of Patent: May 11, 1999
    Assignee: Linvatec Corporation
    Inventor: Gerould W. Norman
  • Patent number: 5897570
    Abstract: A ring blade and drive system, and method of using same, for harvesting bone-tendon-bone ligament grafts having substantially cylindrical bone plugs. The ring blade disclosed is a circular ring having a predetermined arcuate gap formed in its periphery. The drive system includes a blade holder to peripherally hold the ring blade and a fixed-center oscillating mechanism to oscillate the ring blade about its axis within a predetermined arcuate range of motion. The ring blade structure enables the production of a substantially cylindrical bone plug of unlimited length. Harvesting of a bone-tendon-bone ligament graft is facilitated with the ring blade and method disclosed which enables the ring blade to be placed partially around a tendon segment to create bone plugs aligned with the tendon fibers included in the defined tendon segment. The cuts into the bone may be initiated into the bone at either end of the tendon segment from the tendon side through to the exterior of the bone to which the tendon is attached.
    Type: Grant
    Filed: May 16, 1997
    Date of Patent: April 27, 1999
    Assignee: Linvatec Corporation
    Inventors: William Palleva, Terry Van Blaricom
  • Patent number: 5851208
    Abstract: An elongated, rotatable surgical cutting instrument having a rotatable cutting element at the distal end of a bendable non-rotating elongated outer member. The instrument enables operation of various cutting devices such as a bendable rotatable burr. In one embodiment the cutting element is rotatably, but irremovably attached to the distal end of the outer member. The proximal end of the cutting element is then releasably attached to the distal end of a flexible coupling which in turn is attached to the distal end of an elongated inner member. The assembly is then rotatably secured within the outer member so the cutting element may be rotated via the inner member. An aspirating lumen extends through the cutting element, the flexible coupling and the inner member and the inner member may be removed from the outer member without detaching the cutting element therefrom. In another embodiment, the cutting element is removable from the outer member when the inner member is removed.
    Type: Grant
    Filed: October 15, 1996
    Date of Patent: December 22, 1998
    Assignee: Linvatec Corporation
    Inventor: A. Frank Trott
  • Patent number: 5843110
    Abstract: A ring blade and drive system, and method of using same, for harvesting bone-tendon-bone ligament grafts having substantially cylindrical bone plugs. The ring blade disclosed is a circular ring having a predetermined arcuate gap formed in its periphery. The drive system includes a blade holder to peripherally hold the ring blade and a fixed-center oscillating mechanism to oscillate the ring blade about its axis within a predetermined arcuate range of motion. The ring blade structure enables the production of a substantially cylindrical bone plug of unlimited length. Harvesting of a bone-tendon-bone ligament graft is facilitated with the ring blade and method disclosed which enables the ring blade to be placed partially around a tendon segment to create bone plugs aligned with the tendon fibers included in the defined tendon segment. The cuts into the bone may be initiated into the bone at either end of the tendon segment from the tendon side through to the exterior of the bone to which the tendon is attached.
    Type: Grant
    Filed: May 16, 1997
    Date of Patent: December 1, 1998
    Assignee: Linvatec Corporation
    Inventors: Brian David Dross, William Palleva, Terry Van Blaricom
  • Patent number: 5843106
    Abstract: A rotary blade assembly is provided with a stationary outer tube having a cutting window at its distal tip. The window has a curvilinear profile defined by a peripheral rim surrounded entirely by a land surface angled relative to the rim. The inclination of the land produces a sharp edge around the periphery of the window of the outer member. The curvilinear window is produced by a single step manufacturing process which creates the window opening at the same time that the land surrounding the opening is inclined.
    Type: Grant
    Filed: June 23, 1997
    Date of Patent: December 1, 1998
    Assignee: Linvatec Corporation
    Inventor: Gary R. Heisler
  • Patent number: 5839196
    Abstract: A wrenchless collet for attaching a surgical saw blade to an oscillating handpiece. The collet is provided within a housing attached to the handpiece and contains a clamping means for holding the blade and a bi-stable operating mechanism capable of holding the clamping means in either an open position to receive the blade or in a closed position to hold the blade for use with the handpiece. The bi-stable operating mechanism is activated into either position by simply being pushed in one direction or another. In one embodiment, the bi-stable operating mechanism comprises a shaft which may be positioned to one axial extreme or the other and which is held in the chosen position by a spring which frictionally engages the collet housing to maintain the clamping means in either an open or closed position.
    Type: Grant
    Filed: July 3, 1997
    Date of Patent: November 24, 1998
    Assignee: Linvatec Corporation
    Inventor: A. Frank Trott
  • Patent number: 5836867
    Abstract: An endoscope coupler apparatus and method includes a sealed chamber and a lens assembly movable within the chamber for optically adjusting an image to be received by a video camera. The optical adjustment may be, for example, a focus adjustment or a zoom or orientation adjustment, etc. In a preferred embodiment, spaced permanent drive magnets located in an outer rotatable frame situated outside of the chamber are magnetically coupled with respective permanent driven magnets secured to an inner rotatable frame within the sealed chamber. The outer frame is rotatable but not longitudinally movable about the chamber and rotates the drive magnets and, therefore, the driven magnets. The inner frame is secured to a rotatable cylindrical housing which engages a lens assembly. Rotation of the driven magnets and the cylindrical housing moves the lens assembly longitudinally in response to rotation of an adjustment ring attached to the outer frame.
    Type: Grant
    Filed: November 11, 1997
    Date of Patent: November 17, 1998
    Assignee: Linvatec Corporation
    Inventors: Craig J. Speier, Arthur James Devine
  • Patent number: 5833702
    Abstract: A process for simultaneously shaping and sharpening a cutting widow at the distal end of a tubular member of a rotary blade assembly. The assembly is provided with a stationary elongated outer tube, having a cutting window at its distal tip and includes a rotatable elongated inner tube having a cutting means at its distal tip. The window in the outer tube has a curvilinear profile defined by a peripheral rim surrounded entirely by a land surface which is inclined relative to the rim. The inclination of the land produces an area which tapers from a full thickness, where the land is adjacent to the cylindrical wall of the outer tube, to a sharp edge around the periphery of the window. The curvilinear window is produced by a manufacturing process which creates the window opening with a sharpened periphery at the same time that the land surrounding the opening is inclined.
    Type: Grant
    Filed: July 31, 1997
    Date of Patent: November 10, 1998
    Assignee: Linvatec Corporation
    Inventors: Robert A. Van Wyk, Gary R. Heisler
  • Patent number: 5833246
    Abstract: A centrifugal chuck for a surgical handpiece is adapted to automatically engage a surgical instrument so it may be driven by the handpiece. The centrifugal chuck comprises a pivotable trunnion body situated within a hollow drive shaft, the trunnion body having a throughbore coaxially aligned with the axis of the hollow drive shaft in order to receive the shaft of the surgical instrument. The trunnion body is secured to a pair of lever arms symmetrically situated about the exterior of the drive shaft, the lever arms extending in opposite proximal and distal directions from the pivotable attachment of the trunnion body to the drive shaft. Rotation of the drive shaft causes radially outward movement of the lever arms thereby misaligning the throughbore of the trunnion body relative to the drive shaft in order to frictionally engage the shaft of the surgical instrument.
    Type: Grant
    Filed: May 6, 1997
    Date of Patent: November 10, 1998
    Assignee: Linvatec Corporation
    Inventor: A. Frank Trott
  • Patent number: 5827291
    Abstract: An elongated suture anchor driver having a suture retaining means at its proximal end. The driver receives a suture anchor at its distal tip and has a throughbore for enabling suture attached to the suture anchor to pass through the driver from its distal end to its proximal end. The proximal end of the driver is provided with a channel and a fixed post for guiding the suture exiting from the throughbore into an annular recess. A spring loaded slidable cylindrical sleeve acts against the suture in the recess to frictionally retain the suture, thereby securing the suture anchor and suture within the driver.
    Type: Grant
    Filed: November 5, 1996
    Date of Patent: October 27, 1998
    Assignee: Linvatec Corporation
    Inventors: Joseph Fucci, A. Frank Trott
  • Patent number: 5810858
    Abstract: A positioning system for controlling the orientation of the movable elongated inner member relative to the fixed elongated outer member of a surgical instrument. An endoscopic rotatable shaver instrument incorporates a shaver blade assembly adapted to be received in and driven by a handpiece. The movable component of the shaver blade assembly is provided with a position indicator which is read by a sensor in the handpiece in order to control the position at which the inner member is stopped relative to the outer member. The invention is embodied in an apparatus and method enabling use of a shaver blade assembly as an aspirating device or as a probe without any aspirating function.
    Type: Grant
    Filed: June 18, 1997
    Date of Patent: September 22, 1998
    Assignee: Linvatec Corporation
    Inventors: Phillip J. Berman, Raymond A. Carr
  • Patent number: 5803733
    Abstract: A pneumatically powered surgical handpiece suitable for a pencil-type handpiece configuration in which the pressurized fluid inlet is axially directed relative to the handpiece body. Fluid is directed through a dispersing section from an axial direction to a radially outward direction against the interior of a hollow cylindrical turbine body provided with a plurality of circumferentially arranged and longitudinally extending semi-circular channels adapted to receive the fluid flow and redirect it proximally through an annular exhaust channel situated annularly about the fluid inflow conduit. An output shaft is integrally formed with the turbine body and extending distally therefrom and a surgical instrument may be attached to or integrally formed within this output shaft. The invention also resides in a method for fluidically driving a surgical handpiece and lends itself to a method of producing a disposable fluidically driven surgical instrument.
    Type: Grant
    Filed: May 6, 1997
    Date of Patent: September 8, 1998
    Assignee: Linvatec Corporation
    Inventors: A. Frank Trott, W. Lane Ector, Jr.
  • Patent number: 5794715
    Abstract: An improved rotary tool head includes a modular embodiment having a shaft with a tapered insertion end to ease insertion into a handpiece socket and to cause self-alignment of the shaft with the socket. Another embodiment of the improved rotary tool head includes a collet with nonlinear slots separating the collet tangs. The nonlinear slots cause a wire or shaft inserted into the collet to be centralized in the collet and prevent the wire or shaft from protruding between the tangs.
    Type: Grant
    Filed: July 8, 1996
    Date of Patent: August 18, 1998
    Assignee: Linvatec Corporation
    Inventor: Gerould W. Norman
  • Patent number: 5779697
    Abstract: An elongated arthroscopic cannula having proximal and distal elastomeric sealing means through which elongated surgical instruments may be inserted. The cannula seals maintain their effectiveness with and without instruments present within the cannula. The distal sealing means is a transverse linear slit supported around its perimeter by a racetrack-shaped reinforcing member to engage instruments inserted therethrough and to seal the proximal side of the linear slit from the distal side when no instrument is used. The proximal sealing means is a floating, circular aperture capable of being laterally moved and tilted in order to provide a sealing function around an instrument shaft whether or not the shaft is aligned with the axis of the cannula.
    Type: Grant
    Filed: May 28, 1997
    Date of Patent: July 14, 1998
    Assignee: Linvatec Corporation
    Inventors: Michael P. Glowa, Phillip J. Berman
  • Patent number: 5779662
    Abstract: A powered tissue resection system for use during endoscopic surgical procedures in which a body cavity is filled with a gas medium to maintain pneumoperitoneum. A powered tissue resection device is utilized to simultaneously resect and aspirate tissue from the surgical work site within the gas-filled body cavity. Along with the aspirated tissue a portion of the ambient fluid medium is aspirated. A separating means is provided to separate the resected tissue and other debris from the fluid medium, generally carbon dioxide, and return the latter to the body cavity to maintain pneumoperitoneum.
    Type: Grant
    Filed: May 20, 1996
    Date of Patent: July 14, 1998
    Assignee: Linvatec Corporation
    Inventor: Phillip J. Berman
  • Patent number: 5766199
    Abstract: A rotating endoscopic shaver blade assembly adapted for side-cutting and end-cutting. A pair of longitudinally extending, symmetrical fingers extends from the distal end of an elongated tubular inner member and are juxtaposed adjacent a window at the distal end of an elongated tubular outer member. Each of the fingers is provided with laterally facing and transversely facing cutting edges and has a curvilinear profile terminating at a distal tip. The distal tips of the fingers are separated by an axially aligned gap which enables limited stress-relieving radial movement of the fingers.
    Type: Grant
    Filed: April 10, 1996
    Date of Patent: June 16, 1998
    Assignee: Linvatec Corporation
    Inventors: Gary R. Heisler, Robert A. Van Wyk
  • Patent number: D397437
    Type: Grant
    Filed: August 23, 1993
    Date of Patent: August 25, 1998
    Assignee: Hall Surgical
    Inventor: Imre Hlavicska
  • Patent number: D402966
    Type: Grant
    Filed: April 16, 1997
    Date of Patent: December 22, 1998
    Assignee: Linvatec Corporation
    Inventor: Joepert R. Lim
  • Patent number: D406223
    Type: Grant
    Filed: December 17, 1997
    Date of Patent: March 2, 1999
    Assignee: Linvatec Corporation
    Inventor: Thanh Trong Tran