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).

  • Patent number: 11033325
    Abstract: An end effector of an electrosurgical device may include one or more electrodes and a movable electrode scraper having a plurality of features in mechanical communication with a surface of the one or more electrodes and configured to move across the surface of the electrodes thereby removing biological debris adhering to the surface of the electrodes. The electrosurgical device may include a diverter in mechanical communication with the one or more electrodes. The scraper may also be configured to move across the surface of the diverter. The scraper may be operated by the action of an extendable mechanism in mechanical communication with a shaft of the electrosurgical device. An end effector of an electrosurgical device may include one or more electrodes and a movable electrode sleeve configured to movably cover the one or more electrodes.
    Type: Grant
    Filed: February 16, 2017
    Date of Patent: June 15, 2021
    Assignee: Cilag GmbH International
    Inventors: David C. Yates, David A. Witt, Frederick E. Shelton, IV, John A. Weed, III, Chad P. Boudreaux
  • Patent number: 11033323
    Abstract: Aspects of the present disclosure include control systems of an electrosurgical system for managing the flow of fluid, such as saline, and rates of aspiration or suction, in response to various states of conditions at a surgical site. The control system(s) may monitor and adjust to impedance at the surgical site, temperature of the surgical tissue, and/or RF current of electrodes, and may account for certain undesirable conditions, such as the electrodes sticking. The control systems may include various automatic sensing scenarios, while also allowing for several manual conditions.
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: June 15, 2021
    Assignee: Cilag GmbH International
    Inventors: David A. Witt, David C. Yates, Frederick E. Shelton, IV, Cory G. Kimball, Barry C. Worrell, Monica L. Rivard
  • Publication number: 20210137553
    Abstract: An apparatus includes a shaft assembly and an end effector. The shaft assembly includes a first coupling member and a second coupling member. The first coupling member and the second coupling member are configured to flex toward each other from a first position to a second position. The first coupling member and the second coupling member define a pivot axis in the first position. The end effector includes an ultrasonic blade and a clamp arm. The clamp arm is configured to couple or decouple with the shaft assembly when the first coupling member and the second coupling member are in the second position. The clamp arm is configured to pivot toward and away the ultrasonic blade about the pivot axis when the first coupling member and the second coupling member are in the first position.
    Type: Application
    Filed: December 21, 2020
    Publication date: May 13, 2021
    Inventors: John A. Hibner, Richard C. Smith, Catherine A. Corbett, Craig N. Faller, David A. Witt
  • Patent number: 10973542
    Abstract: An apparatus includes a shaft assembly and an end effector. The shaft assembly includes a first coupling member and a second coupling member. The first coupling member and the second coupling member are configured to flex toward each other from a first position to a second position. The first coupling member and the second coupling member define a pivot axis in the first position. The end effector includes an ultrasonic blade and a clamp arm. The clamp arm is configured to couple or decouple with the shaft assembly when the first coupling member and the second coupling member are in the second position. The clamp arm is configured to pivot toward and away the ultrasonic blade about the pivot axis when the first coupling member and the second coupling member are in the first position.
    Type: Grant
    Filed: October 30, 2018
    Date of Patent: April 13, 2021
    Assignee: Ethicon LLC
    Inventors: John A. Hibner, Richard C. Smith, Catherine A. Corbett, Craig N. Faller, David A. Witt
  • Patent number: 10959748
    Abstract: An ultrasonic instrument comprises an ultrasonic transducer, an acoustic waveguide, and an ultrasonic blade. The blade includes a pair of obliquely extending edges. The obliquely extending edges diverge away from the longitudinal axis of the waveguide and away from each other along respective paths extending distally in relation to the waveguide. A distal portion of the blade is wider than a proximal portion of the blade along a plane. The blade further includes a curved distal edge and several laterally presented surfaces. The laterally presented surfaces may provide combinations of concave and convex curvatures. The laterally presented surfaces may be angled and/or curved along one or more orthogonal planes associated with the longitudinal axis of the waveguide.
    Type: Grant
    Filed: November 2, 2017
    Date of Patent: March 30, 2021
    Assignee: Ethicon LLC
    Inventors: David A. Witt, Timothy G. Dietz, Stephen J. Balek, Benjamin M. Boyd, David C. Groene, Benjamin V. Vins, William C. Horton, III, Ashvani K. Madan
  • Publication number: 20210055135
    Abstract: An inductive position sensor may be configured to detect relative position between a first member and a second member. The inductive position sensor may include a transmit aerial configured to be disposed on the first member. The inductive position sensor may include a receive aerial configured to be disposed on the first member. The inductive position sensor may include processing circuitry configured to provide one or more signals indicative of the relative position between the first member and the second member based on a receive signal induced in the receive aerial resulting from a signal provided to the transmit aerial. One or more of the transmit aerial and the receive aerial may include one or more windings. A shape of the one or more windings can be a combination of a sinusoidal waveform and one or more scaled harmonics of the sinusoidal waveform.
    Type: Application
    Filed: July 30, 2020
    Publication date: February 25, 2021
    Inventors: Paul Smith, David Witts
  • Publication number: 20210007770
    Abstract: An apparatus for operating on tissue comprises a shaft, an acoustic waveguide, and an end effector. The acoustic waveguide extends along the shaft and is configured to transmit ultrasonic vibration, The end effector comprises an ultrasonic blade and a clamp arm. The ultrasonic blade is in acoustic communication with the acoustic waveguide. The clamp arm is pivotable toward the ultrasonic blade. The end effector defines a first longitudinal region and a second longitudinal region, The end effector is configured to clamp tissue between the clamp arm and the ultrasonic blade in the first longitudinal region. The end effector is configured to sever tissue with the ultrasonic blade in the second longitudinal region.
    Type: Application
    Filed: July 28, 2020
    Publication date: January 14, 2021
    Inventors: Jeffrey D. Messerly, David A. Witt, Foster B. Stulen, Christopher A. Papa, Vincent P. Battaglia, JR.
  • Patent number: 10888347
    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: Grant
    Filed: March 24, 2017
    Date of Patent: January 12, 2021
    Assignee: Ethicon LLC
    Inventors: David A. Witt, Jeffrey D. Messerly, Kevin L. Houser
  • Publication number: 20200388903
    Abstract: A liquid level sensor system can include a container configured to hold a volume of a liquid and a monopole antenna arranged proximate the volume of the liquid. A radiofrequency circuit may be configured to apply a radio frequency signal to the monopole antenna and provide one or more signals indicative of a level of the volume of the liquid within the container based on a radio frequency characteristic of the monopole antenna.
    Type: Application
    Filed: May 15, 2020
    Publication date: December 10, 2020
    Inventors: David Witts, Olivier Pajona, Markus Frädrich, Stefan Rühl, Stephane Proust, Jaakko Kyllonen, Jonathan Hayes
  • Publication number: 20200384976
    Abstract: A system for sensing a position of a first member relative to a second member based on a radio frequency characteristic of a bias member is disclosed. The bias member may be configured to bias the second member relative to the first member. Radio frequency circuitry may be configured to apply a radio frequency signal to the bias member and provide one or more signals indicative of a position of the first member relative to the second member based on a radio frequency characteristic of the bias member.
    Type: Application
    Filed: May 15, 2020
    Publication date: December 10, 2020
    Inventors: David Witts, Olivier Pajona, Markus Frädrich, Stefan Rühl, Stephane Proust, Jaakko Kyllonen, Jonathan Hayes
  • Publication number: 20200375651
    Abstract: An end effector of an electrosurgical device may include a discharge port in communication with a first fluid path, an aspiration port in communication with a second fluid path, a first and second electrode, and a diverter in mechanical communication with the two electrodes. The diverter may receive, on its surface, a fluid emitted by the discharge port, and maintain a contact of the fluid with the first and second electrodes. The diverter may be further configured to prevent an aspiration, by the aspiration port, of the fluid on its surface. An electrosurgical device may include a source port in communication with a first fluid path, an evacuation port in communication with a second fluid path, a first and second electrode, and a housing. The device may include a shaft extending distally from the housing and the end effector as described above.
    Type: Application
    Filed: August 19, 2020
    Publication date: December 3, 2020
    Inventors: David A. Witt, Frederick E. Shelton, IV, David C. Yates, Chad P. Boudreaux, Eric M. Roberson, Kevin L. Houser, Geoffrey S. Strobl
  • Publication number: 20200324783
    Abstract: A personalized seating zone system of a vehicle cabin and a method for implementing such. The personalized seating zone system includes at least one personalized seating zone and is configured to collect biometric data corresponding to an occupant of the personalized seating zone system, match the collected biometric data to an identification tag to identify the occupant by comparing the collected biometric data to stored biometric data from an identification database, and load seat system settings for a personalized seating zone within the personalized seating zone system based on the matched identification tag.
    Type: Application
    Filed: June 28, 2019
    Publication date: October 15, 2020
    Applicant: KARMA AUTOMOTIVE LLC
    Inventors: Michael GROENE, David WITT, Gareth WILLIAMS, Andre Franco LUIS, Andreas THURNER
  • Publication number: 20200315651
    Abstract: A bone cutting surgical instrument includes features to mitigate heat generation during use. Excessive heat can be detrimental to bone health as well as to the instrument itself. In one example a liquid dispensing feature provides a flow of cooling liquid to an ultrasonic blade via a lumen in a waveguide of the instrument. In another example, the blade has a serrated edge with a plurality of teeth arranged in a pattern to provide dimension and space during cutting actions. In another example, the blade has an oversize distal portion that creates an oversize slot when cutting to avoid excessive contact between the cut bone and proximal portions of the blade. In another example the blade includes an irrigation slot and also a micro slot in a distal end of the blade that connects with the irrigation slot.
    Type: Application
    Filed: March 31, 2020
    Publication date: October 8, 2020
    Inventors: Ashvani K. Madan, David A. Witt, John A. Weed, III, Stephen J. Balek, Joseph Isosaki, Peter K. Shires, William D. Dannaher
  • Patent number: 10772656
    Abstract: An apparatus for operating on tissue comprises a shaft, an acoustic waveguide, and an end effector. The acoustic waveguide extends along the shaft and is configured to transmit ultrasonic vibration. The end effector comprises an ultrasonic blade and a clamp arm. The ultrasonic blade is in acoustic communication with the acoustic waveguide. The clamp arm is pivotable toward the ultrasonic blade. The end effector defines a first longitudinal region and a second longitudinal region. The end effector is configured to clamp tissue between the clamp arm and the ultrasonic blade in the first longitudinal region. The end effector is configured to sever tissue with the ultrasonic blade in the second longitudinal region.
    Type: Grant
    Filed: January 3, 2018
    Date of Patent: September 15, 2020
    Assignee: Ethicon LLC
    Inventors: Jeffrey D. Messerly, David A. Witt, Foster B. Stulen, Christopher A. Papa, Vincent P. Battaglia, Jr.
  • Patent number: 10751117
    Abstract: An end effector of an electrosurgical device may include a discharge port in communication with a first fluid path, an aspiration port in communication with a second fluid path, a first and second electrode, and a diverter in mechanical communication with the two electrodes. The diverter may receive, on its surface, a fluid emitted by the discharge port, and maintain a contact of the fluid with the first and second electrodes. The diverter may be further configured to prevent an aspiration, by the aspiration port, of the fluid on its surface. An electrosurgical device may include a source port in communication with a first fluid path, an evacuation port in communication with a second fluid path, a first and second electrode, and a housing. The device may include a shaft extending distally from the housing and the end effector as described above.
    Type: Grant
    Filed: September 23, 2016
    Date of Patent: August 25, 2020
    Assignee: Ethicon LLC
    Inventors: David A. Witt, Frederick E. Shelton, IV, David C. Yates, Chad P. Boudreaux, Eric M. Roberson, Kevin L. Houser, Geoffrey S. Strobl
  • Patent number: 10702296
    Abstract: An apparatus includes a body assembly, an acoustic waveguide, an ultrasonic blade, and a liquid dispensing feature. The ultrasonic blade is positioned distally relative to the body assembly. The ultrasonic blade is in acoustic communication with the acoustic waveguide. The liquid dispensing feature is positioned distally relative to the body assembly. The liquid dispensing feature is positioned adjacent to the ultrasonic blade. The liquid dispensing feature is configured to deliver a flow of cooling liquid to the ultrasonic blade.
    Type: Grant
    Filed: May 25, 2016
    Date of Patent: July 7, 2020
    Assignee: Ethicon LLC
    Inventors: Chad P. Boudreaux, Jeffrey D. Messerly, Kevin Bash, David A. Witt, Cory G. Kimball
  • Patent number: 10660663
    Abstract: A bone cutting surgical instrument includes features to mitigate heat generation during use. Excessive heat can be detrimental to bone health as well as to the instrument itself. In one example a liquid dispensing feature provides a flow of cooling liquid to an ultrasonic blade via a lumen in a waveguide of the instrument. In another example, the blade has a serrated edge with a plurality of teeth arranged in a pattern to provide dimension and space during cutting actions. In another example, the blade has an oversize distal portion that creates an oversize slot when cutting to avoid excessive contact between the cut bone and proximal portions of the blade. In another example the blade includes an irrigation slot and also a micro slot in a distal end of the blade that connects with the irrigation slot.
    Type: Grant
    Filed: May 25, 2016
    Date of Patent: May 26, 2020
    Assignee: Ethicon LLC
    Inventors: Ashvani K. Madan, David A. Witt, John A. Weed, III, Stephen J. Balek, Joseph Isosaki, Peter K. Shires, William D. Dannaher
  • Publication number: 20200132874
    Abstract: Inductive position sensors for sensing relative position (e.g., relative rotary position) between members are provided. In one example implementation, the inductive position sensor includes a transmit aerial having at least one transmit winding. The inductive position sensor can include a receive aerial having one or more receive windings. The inductive position sensor can include a coupling element operable to be disposed on the second member. The inductive position sensor can include processing circuitry configured to provide one or more signals indicative of the position of the first member relative to the second member based on current induced in the one or more receive windings resulting from an oscillating signal provided to the transmit winding. The inductive position sensor includes at least one electrostatic shield. The electrostatic shield can include a plurality of conductive traces arranged so that no current loops are formed in the electrostatic shield.
    Type: Application
    Filed: October 30, 2019
    Publication date: April 30, 2020
    Inventors: David Witts, Peter Constantinou, Paul Smith
  • Publication number: 20200107853
    Abstract: An apparatus includes a body assembly, an acoustic waveguide, an ultrasonic blade, and a liquid dispensing feature. The ultrasonic blade is positioned distally relative to the body assembly. The ultrasonic blade is in acoustic communication with the acoustic waveguide. The liquid dispensing feature is positioned distally relative to the body assembly. The liquid dispensing feature is positioned adjacent to the ultrasonic blade. The liquid dispensing feature is configured to deliver a flow of cooling liquid to the ultrasonic blade.
    Type: Application
    Filed: November 26, 2019
    Publication date: April 9, 2020
    Inventors: Chad P. Boudreaux, Jeffrey D. Messerly, Kevin Bash, David A. Witt, Cory G. Kimball
  • Patent number: D909935
    Type: Grant
    Filed: April 1, 2019
    Date of Patent: February 9, 2021
    Assignee: Karma Automotive LLC
    Inventors: Rodrigo Galdino, Andre Franco Luis, David Witt