Patents by Inventor David A. Witt

David A. Witt 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).

  • Publication number: 20090191850
    Abstract: According to one embodiment, a mobile phone wirelessly receives an alert request from a separate alert triggering device via a first wireless interface of the mobile phone. In response to the alert request, the mobile phone automatically transmits an alert message utilizing wireless radio frequency communication via a second wireless interface of the mobile phone and a wireless wide area network. The communication of alerts can further be supported by the viral transmission of alert relay requests that propagate opportunistically in an attempt to reach a communication device, such as a mobile phone or WAP, that is capable of delivering an alert relay message to an electronic communication destination.
    Type: Application
    Filed: January 30, 2009
    Publication date: July 30, 2009
    Applicant: Spitfire Ltd.
    Inventors: Walter W. Cardwell, III, James O. Guleke, II, Kyle David Witt
  • Publication number: 20090143806
    Abstract: An ultrasonic surgical blade includes a body having a proximal end, a distal end, and an outer surface. The distal end is movable relative to a longitudinal axis in accordance with ultrasonic vibrations applied to the proximal end. At least a portion of the outer surface of the body comprises a lubricious coating adhered thereto. The lubricious coating has a coefficient of friction that is less than the coefficient of friction of the outer surface of the body.
    Type: Application
    Filed: November 20, 2008
    Publication date: June 4, 2009
    Applicant: Ethicon Endo-Surgery, Inc.
    Inventors: David A. Witt, Jeffrey D. Messerly, Kevin L. Houser
  • Publication number: 20080077131
    Abstract: An electrosurgical stapling instrument includes an end effector capable of applying bipolar RF energy into tissue. The end effector has a first pole electrode and a second pole electrode for forming an RF contact circuit with tissue. At least one of the electrodes may have a dielectric coating thereon to create a RF circuit with tissue. The dielectric coating can cover one of the electrodes to create a capacitive coupling circuit with tissue, or can have at least one open passageway extending through the dielectric coating to enable tissue contact with the electrode and the passage of RF energy therethrough. The dielectric coating on the electrode can be masked to create passageways through the dielectric, or the dielectric coating can be locally removed with a variety of techniques to form passageways. The dielectric coating may provide a barrier to prevent shorting between the dielectrically coated electrode and a conductive fastener embedded within tissue.
    Type: Application
    Filed: September 22, 2006
    Publication date: March 27, 2008
    Inventors: David C. Yates, Philip Q. Shuster, Kenneth V. Moran, Chester O. Baxter, David A. Witt, James R. Giordano, Jesse J. Kuhns
  • Publication number: 20080028815
    Abstract: The present invention involves cost effective, efficient systems and methods for sizing pipe. In an embodiment of the present invention, a pipe sizing system includes a die having an opening operable to size the pipe, a hydraulic cylinder having at least one rod attached thereto, the hydraulic cylinder and the at least one rod cooperating with each other to push the pipe through the die, and a receiver to guide the pipe as the pipe exits from the die.
    Type: Application
    Filed: October 12, 2007
    Publication date: February 7, 2008
    Inventors: Paul Fullerton, Nathan Roden, David Witt
  • Publication number: 20070282332
    Abstract: An ultrasonic clamp coagulator assembly that is configured to permit selective cutting, coagulation and clamping of tissue during surgical procedures. An elongated portion of the instrument can be configured for endoscopic applications and has an outside diameter of less than 6 mm. The construction includes a clamping mechanism, including a clamp arm pivotally mounted at the distal portion of the instrument, which is specifically configured to create a desired level of tissue clamping forces. The clamping mechanism includes a two-piece pad design and pad material that enables the higher tissue clamping forces and a force-limiting mechanism that effectively smoothes out abusive tissue forces.
    Type: Application
    Filed: May 22, 2007
    Publication date: December 6, 2007
    Inventors: David A. Witt, Reginald D. Fortson, Joseph E. Young
  • Publication number: 20070282335
    Abstract: An ultrasonic clamp coagulator system that is configured to permit selective cutting, coagulation and clamping of tissue during surgical procedures. An elongated portion of the instrument can be configured for endoscopic applications and has an outside diameter of less than 6 mm. The system includes a one-piece torque wrench that is provided with cantilever arms aligned in an annular fashion about the centerline of the torque wrench. The cantilever arms include teeth in an inward perpendicular fashion in relation to cantilever arms. The clamp coagulator includes an outer tube retainer that includes spline gears projecting in a perpendicular fashion along the outer circumference of retainer. Torque is transmitted through the cantilever arms to the spline gears for attaching a handpiece to the clamp coagulator.
    Type: Application
    Filed: May 22, 2007
    Publication date: December 6, 2007
    Inventors: Joseph E. Young, David A. Witt, Reginald D. Fortson, Thomas E. Adams, John A. Weed, William D. Dannaher
  • Patent number: 7108695
    Abstract: A temperature monitoring device and/or method which control the tissue temperature at the end-effector of a therapeutic ultrasonic cutting and coagulating instrument as the tissue is being heated with ultrasonic vibrations from the end-effector. One or more temperature sensors are located at the end-effector, preferably on a clamping member. The temperature sensors measure the temperature of the tissue engaged by the end-effector either directly or indirectly. An alternate method and apparatus provides an electrical tissue impedance measure in combination with an ultrasonic cutting and coagulating instrument to provide active feedback control of an ultrasonic generator.
    Type: Grant
    Filed: July 18, 2002
    Date of Patent: September 19, 2006
    Assignee: Ethicon Endo-Surgery, Inc.
    Inventors: David A. Witt, Jerome R. Morgan, Foster B. Stulen, James R. Giordano
  • Publication number: 20060053859
    Abstract: The present invention involves cost effective, efficient systems and methods for sizing pipe. In an embodiment of the present invention, a pipe sizing system includes a die having an opening operable to size the pipe, a hydraulic cylinder having at least one rod attached thereto, the hydraulic cylinder and the at least one rod cooperating with each other to push the pipe through the die, and a receiver to guide the pipe as the pipe exits from the die.
    Type: Application
    Filed: January 19, 2005
    Publication date: March 16, 2006
    Inventors: Paul Fullerton, Nathan Roden, David Witt
  • Publication number: 20060020262
    Abstract: The present invention relates to ultrasonic surgical clamping instruments and, more particularly, to a curved clamp arm tissue pad attachment for use with ultrasonic surgical instruments. A curved clamp arm for use with an ultrasonic surgical instrument is described. The curved clamp arm includes a proximal end and a distal end, with a top surface extending from the proximal end to the distal end of the curved clamp arm. The top surface comprises at least one hole. The clamp arm includes a bottom surface opposite the top surface, with the bottom surface extending from the proximal end to the distal end of the clamp arm. The bottom surface includes at least one engaging surface, where the hole in the top surface extends from the top surface to the engaging surface of the clamp arm.
    Type: Application
    Filed: September 23, 2005
    Publication date: January 26, 2006
    Inventors: David Witt, Chester Baxter
  • Patent number: 6958070
    Abstract: The present invention relates to ultrasonic surgical clamping instruments and, more particularly, to a curved clamp arm tissue pad attachment for use with ultrasonic surgical instruments. A curved clamp arm for use with an ultrasonic surgical instrument is described. The curved clamp arm includes a proximal end and a distal end, with a top surface extending from the proximal end to the distal end of the curved clamp arm. The top surface comprises at least one hole. The clamp arm includes a bottom surface opposite the top surface, with the bottom surface extending from the proximal end to the distal end of the clamp arm. The bottom surface includes at least one engaging surface, where the hole in the top surface extends from the top surface to the engaging surface of the clamp arm.
    Type: Grant
    Filed: October 18, 2001
    Date of Patent: October 25, 2005
    Inventors: David A. Witt, Chester O. Baxter
  • Publication number: 20050004569
    Abstract: A bipolar electrosurgical instrument having a pair of relatively moveable jaws, each of which includes a tissue contacting surface. The tissue contacting surfaces of the jaws are in face-to-face relation with one another, and adjacent each of the tissue contacting surfaces are first and second spaced-apart electrodes that are adapted for connection to the opposite terminals of a bipolar RF generator so as to generator a current flow between the electrodes. The first and second electrodes of one jaw are in offset opposed relation, respectively, with the first and second electrodes of the other jaw. A cutting portion is provided between the jaws. The cutting portion is moveable to provide the instrument with a scissors-like capability or a grasper-like capability, depending on the position of the cutting portion.
    Type: Application
    Filed: April 27, 2004
    Publication date: January 6, 2005
    Inventors: David Witt, Craig Faller, Chester Baxter, John Cummings
  • Publication number: 20040199194
    Abstract: The present invention relates to ultrasonic surgical clamping instruments and, more particularly, to a curved clamp arm tissue pad attachment for use with ultrasonic surgical instruments. A curved clamp arm for use with an ultrasonic surgical instrument is described. The curved clamp arm includes a proximal end and a distal end, with a top surface extending from the proximal end to the distal end of the curved clamp arm. The top surface comprises at least one hole. The clamp arm includes a bottom surface opposite the top surface, with the bottom surface extending from the proximal end to the distal end of the clamp arm. The bottom surface includes at least one engaging surface, where the hole in the top surface extends from the top surface to the engaging surface of the clamp arm.
    Type: Application
    Filed: April 27, 2004
    Publication date: October 7, 2004
    Inventors: David A. Witt, Chester O. Baxter
  • Publication number: 20040158694
    Abstract: Methods and apparatus are provided for use in a digital processor having a pipeline for executing instructions. The method includes monitoring instructions in the pipeline for instructions that write to a resource and instructions that read from the resource; for each instruction that writes to the resource, storing a write instruction type and write instruction tracking data; for each instruction that reads from the resource, determining a read instruction type and generating a latency value based on the write instruction type and the read instruction type; and stalling execution of the instruction that reads from the resource by a number of stall cycles in response to the latency value and the write instruction tracking data.
    Type: Application
    Filed: February 10, 2003
    Publication date: August 12, 2004
    Inventors: Thomas J. Tomazin, David Witt, Murali Chinnakonda, William H. Hooper
  • Patent number: 6637163
    Abstract: A deck including a panel, a retainer and a fastener. The panel includes a flange having an aperture therein. The retainer includes an upper leg and a lower leg embracing the flange therebetween, with the lower leg having a fastener receiving opening. The fastener is for attaching the panel to structural framework, with the fastener including a shoulder. The fastener extends through the aperture of the flange and the opening of the lower leg of the retainer. The shoulder extends through the aperture in the flange and abuts against the lower leg of the retainer to secure the retainer. Furthermore, the shoulder is sufficiently tall as to prevent the fastener from tightly clamping the flange. Additionally, the flange embraced between the upper leg and the lower leg of the retainer is adapted to expand between the upper leg and the lower leg. Therefore, thermal expansion of the panel is accommodated.
    Type: Grant
    Filed: July 25, 2001
    Date of Patent: October 28, 2003
    Assignee: GT Plastics Inc.
    Inventors: Gary J. Thibault, Kevin J. Beliveau, Matthew J. Gary, Ralph Brege, David A. Witt, Edward L. Ivinson, Robin Colbath
  • Publication number: 20030196072
    Abstract: A digital signal processor includes an instruction fetch unit for fetching and decoding instructions, a data cache, a memory, an execution unit, including a register file, for executing the instructions, and a load control unit for loading data from the data cache to the register file in response to instructions of a first instruction type and for loading data from the memory to the register file in response to instructions of a second instruction type. Instructions of the first instruction type may be microcontroller instructions, and instructions of the second instruction type may be digital signal processor instructions. The execution unit may include a microcontroller execution unit having a first number of pipeline stages for executing the microcontroller instructions and a digital signal processor execution unit having a second number of pipeline stages for executing the digital signal processor instructions.
    Type: Application
    Filed: April 11, 2002
    Publication date: October 16, 2003
    Inventors: Murali S. Chinnakonda, Hebbalalu S. Ramagopal, David Witt
  • Publication number: 20030019171
    Abstract: A deck including a panel, a retainer and a fastener. The panel includes a flange having an aperture therein. The retainer includes an upper leg and a lower leg embracing the flange therebetween, with the lower leg having a fastener receiving opening. The fastener is for attaching the panel to structural framework, with the fastener including a shoulder. The fastener extends through the aperture of the flange and the opening of the lower leg of the retainer. The shoulder extends through the aperture in the flange and abuts against the lower leg of the retainer to secure the retainer. Furthermore, the shoulder is sufficiently tall as to prevent the fastener from tightly clamping the flange. Additionally, the flange embraced between the upper leg and the lower leg of the retainer is adapted to expand between the upper leg and the lower leg. Therefore, thermal expansion of the panel is accommodated.
    Type: Application
    Filed: July 25, 2001
    Publication date: January 30, 2003
    Inventors: Gary J. Thibault, Kevin J. Beliveau, Matthew J. Gary, Ralph Brege, David A. Witt, Edward L. Ivinson, Robin Colbath
  • Publication number: 20020183774
    Abstract: Described is a method and apparatus for controlling the heat treatment of tissue in response to the measured temperature as an indication of tissue treatment status of the tissue being treated by an ultrasonic cutting and coagulating instrument. A method and apparatus for controlling the heat treatment of tissue in separate modes for ultrasonic cutting and ultrasonic coagulation is disclosed. Accordingly the present invention provides a temperature monitoring device and/or method which controls the tissue temperature at the end-effector of a therapeutic ultrasonic cutting and coagulating instrument as the tissue is being heated with ultrasonic vibrations from the end-effector. One or more temperature sensors are located at the end-effector, preferably on a clamping member. The temperature sensors measure the temperature of the tissue engaged by the end-effector either directly or indirectly.
    Type: Application
    Filed: July 18, 2002
    Publication date: December 5, 2002
    Inventors: David A. Witt, Jerome R. Morgan, Foster B. Stulen, James R. Giordano
  • Patent number: 6483646
    Abstract: The present invention is an apparatus for monocular head displays, which enables a compact, light in weight, sturdy apparatus that has a wide angle of viewing, a bright and sharp image display that operates on low voltage in a wide range of temperatures. The image is bright and high in contrast. Due to the compactiveness and wide viewing angle, it is readily useable inside helmets and goggles and visors. The signals that can be used include data, maps, graphics or video images including infrared or other images. Because of the wide viewing angle, the module may be placed and adjusted for multiple users and field installation.
    Type: Grant
    Filed: August 16, 2001
    Date of Patent: November 19, 2002
    Inventors: Thomas P. Scott, David Witt
  • Patent number: 6458142
    Abstract: The present invention relates, in general, to ultrasonic surgical clamping instruments and, more particularly, to an improved force limiting mechanism for an ultrasonic surgical clamping instrument. An ultrasonic clamp coagulator apparatus is described including a housing, an actuator, an outer tube having a proximal end joined to the housing, and a distal end. An actuating element is reciprocably positioned within the outer tube and operatively connected to the actuator. An ultrasonic waveguide is positioned within the outer tube, with an end-effector extending distally from the distal end of the outer tube. A clamp arm is pivotally mounted on the distal end of the outer tube for pivotal movement with respect to the end-effector for clamping tissue between the clamp arm and the end-effector. The clamp arm is operatively connected to the actuating element so that reciprocal movement of the actuating element pivots the clamp arm.
    Type: Grant
    Filed: October 5, 1999
    Date of Patent: October 1, 2002
    Assignee: Ethicon Endo-Surgery, Inc.
    Inventors: Craig N. Faller, Chester O. Baxter, III, David A. Witt
  • Patent number: D617163
    Type: Grant
    Filed: August 26, 2009
    Date of Patent: June 8, 2010
    Assignee: Ethicon Endo-Surgery, Inc.
    Inventors: Matthew C. Miller, David A. Witt, Joseph E. Young, Stephen E. Eichmann, John A. Weed, III, William D. Dannaher