Patents by Inventor Keith A. Walter

Keith A. Walter 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: 7461804
    Abstract: There is described a rotary knife for use in a cutting apparatus, comprising a central hub adapted to be mounted with respect to a rotational driveshaft to define an axis of rotation; and a plurality of blades extending outwards from the hub; each blade having respective channels extending across a surface of the blade in a direction substantially parallel to the axis of rotation. There is also described a cutting apparatus having a rotary knife comprising a central hub adapted to be mounted with respect to a rotational driveshaft to define an axis of rotation; and a plurality of blades extending outwards from the hub; each blade having respective channels extending across a surface of the blade in a direction substantially parallel to the axis of rotation.
    Type: Grant
    Filed: June 27, 2006
    Date of Patent: December 9, 2008
    Assignee: JO-AT Limited
    Inventor: Keith Walters
  • Patent number: 7459872
    Abstract: The present invention relates to an apparatus and method for generating digital electrical signals which are representative of the angular position and rotational velocity of a rotatable shaft or similar movable mechanical component in a servomechanism. In particular, the present invention utilizes oversampling techniques to create an accurate, flexible and responsive method for determining shaft position on a high speed motor. The present invention also includes methods for overcoming deadtime losses and velocity lag.
    Type: Grant
    Filed: February 5, 2007
    Date of Patent: December 2, 2008
    Assignee: BAE Systems Land & Armaments L.P.
    Inventors: Lane L. Woodland, Stephen M. Stocker, David J. Badzinski, Jeffrey W. Shoemaker, Keith A. Walters
  • Patent number: 7459900
    Abstract: A modular current sensing system for a servo control system that includes a magnetic core with an open center portion and a connection plate that includes at least three wire connectors, wherein the wire connectors are capable of connecting at least two wires electrically in series. The system also includes a plurality of wires, including a first wire with a first end and a second end, wherein the first end of the first wire is electrically connected to a first power source, and the second end of the first wire is connected to the connection plate at the first wire connector and wherein the first wire passes through the open portion defined by the magnetic core at least once. A first motor current flowing through the first wire induces a core current to flow in the magnetic core, causing the magnetic core to emit a magnetic field. A Hall effect sensor detects the magnetic field, produces an output current, and delivers the output current to a control device within a servo control system.
    Type: Grant
    Filed: February 5, 2007
    Date of Patent: December 2, 2008
    Assignee: BAE Systems Land & Armaments L.P.
    Inventors: Timothy M. Grupa, Lane L. Woodland, Stephen M. Stocker, Martin J. Sukup, Bret C. Bartness, David J. Badzinski, Jeffrey W. Shoemaker, Keith A. Walters
  • Publication number: 20070296368
    Abstract: The present invention relates to an apparatus and method for generating digital electrical signals which are representative of the angular position and rotational velocity of a rotatable shaft or similar movable mechanical component in a servomechanism. In particular, the present invention utilizes oversampling techniques to create an accurate, flexible and responsive method for determining shaft position on a high speed motor. The present invention also includes methods for overcoming deadtime losses and velocity lag.
    Type: Application
    Filed: February 5, 2007
    Publication date: December 27, 2007
    Inventors: Lane Woodland, Stephen Stocker, David Badzinski, Jeffrey Shoemaker, Keith Walters
  • Publication number: 20070273359
    Abstract: A modular current sensing system for a servo control system that includes a magnetic core with an open center portion and a connection plate that includes at least three wire connectors, wherein the wire connectors are capable of connecting at least two wires electrically in series. The system also includes a plurality of wires, including a first wire with a first end and a second end, wherein the first end of the first wire is electrically connected to a first power source, and the second end of the first wire is connected to the connection plate at the first wire connector and wherein the first wire passes through the open portion defined by the magnetic core at least once. A first motor current flowing through the first wire induces a core current to flow in the magnetic core, causing the magnetic core to emit a magnetic field. A Hall effect sensor detects the magnetic field, produces an output current, and delivers the output current to a control device within a servo control system.
    Type: Application
    Filed: February 5, 2007
    Publication date: November 29, 2007
    Inventors: Timothy Grupa, Lane Woodland, Stephen Stocker, Martin Sukup, Bret Bartness, David Badzinski, Jeffrey Shoemaker, Keith Walters
  • Publication number: 20070208422
    Abstract: Systems, devices and methods for performing small incision DLEK include providing a corneal transplantation donor tissue graft; then forming the tissue graft into an implantable configuration using the flexible substrate. Related medical kits and tools for forming a compact or rolled donor tissue graft are also described.
    Type: Application
    Filed: January 25, 2007
    Publication date: September 6, 2007
    Inventors: Keith Walter, Kurt Weber
  • Publication number: 20070001040
    Abstract: There is described a rotary knife for use in a cutting apparatus, comprising a central hub adapted to be mounted with respect to a rotational driveshaft to define an axis of rotation; and a plurality of blades extending outwards from the hub; each blade having respective channels extending across a surface of the blade in a direction substantially parallel to the axis of rotation. There is also described a cutting apparatus having a rotary knife comprising a central hub adapted to be mounted with respect to a rotational driveshaft to define an axis of rotation; and a plurality of blades extending outwards from the hub; each blade having respective channels extending across a surface of the blade in a direction substantially parallel to the axis of rotation.
    Type: Application
    Filed: June 27, 2006
    Publication date: January 4, 2007
    Inventor: Keith Walters
  • Patent number: 7027860
    Abstract: A microstimulator or neural prosthesis is powered and operative in response to an externally applied RF signal which includes a power component and control component. A slow rise time storage circuit stores RF power during a charging period and a fast rise time triggering circuit responsive to a fast rise time input triggers the device for producing output pulses following a selected delay time. The duration of the delay controls the current level of the output pulses.
    Type: Grant
    Filed: August 29, 2002
    Date of Patent: April 11, 2006
    Assignee: Department of Veterans Affairs
    Inventors: Keith Walter Bruninga, Lisa Wittenkeller Riedy, Paul Joseph Zaszczurynski
  • Publication number: 20050115248
    Abstract: An offshore liquefied natural gas structure may receive, store, and process liquefied natural gas from carriers. A structure may be a gravity base structure. A structure may include a system of ballast storage areas, transfer equipment to offload liquefied natural gas from a carrier, docking equipment to allow direct mooring with carriers, platforms to elevate equipment, water intake systems to provide water to the structure, wave deflectors, and/or projections extending from a bottom of the structure. A portion of the structure may be composed of lightweight concrete. Pipelines may be coupled to the structure to export processed natural gas onshore. Living quarters, flare towers, and export line metering equipment may be included on the structure.
    Type: Application
    Filed: October 28, 2004
    Publication date: June 2, 2005
    Inventors: Gregory Koehler, Denby Morrison, Keith Walters, Harke Meek, Paul Wilhelmus Van Weert, Steven Bowring, Robert Figgers, Kelly Bowen, WanJun Kim, David Thomson
  • Publication number: 20040044380
    Abstract: A microstimulator or neural prosthesis is powered and operative in response to an externally applied RF signal which includes a power component and control component. A slow rise time storage circuit stores RF power during a charging period and a fast rise time triggering circuit responsive to a fast rise time input triggers the device for producing output pulses following a selected delay time. The duration of the delay controls the current level of the output pulses.
    Type: Application
    Filed: August 29, 2002
    Publication date: March 4, 2004
    Inventors: Keith Walter Bruninga, Lisa Wittenkeller Riedy, Paul Joseph Zaszczurynski
  • Publication number: 20030167471
    Abstract: A system and method for managing series video-on-demand (SVOD) products is described. One implementation of the described device includes the steps of receiving a selection to activate a SVOD guide; retrieving a list of SVOD providers; retrieving display data for each of the SVOD providers included in the list of SVOD providers; and initiating display of the retrieved display data for each of the SVOD providers, wherein a user can select at least one of the SVOD providers.
    Type: Application
    Filed: March 4, 2002
    Publication date: September 4, 2003
    Inventors: Cliff Roth, David Ruderman, Keith Walter
  • Patent number: D549539
    Type: Grant
    Filed: April 12, 2006
    Date of Patent: August 28, 2007
    Inventor: Keith Walters