Patents by Inventor Geoffrey McCullough

Geoffrey McCullough 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: 20180306329
    Abstract: A pressure balanced valve for an expander of a Rankine cycle heat recovery system includes a valve body that extends along a longitudinal axis. The valve body includes a valve head and an intermediate flange structure spaced apart from each other along the longitudinal axis. The valve body defines an internal flow channel having at least one output port and at least one inlet port. The at least one output port of the internal flow channel is defined by a cylinder chamber side of the valve head. The at least one inlet port of the internal flow channel is defined by a valve stem side of the intermediate flange structure. The internal flow channel is operable to communicate fluid pressure between the cylinder chamber side of the valve head and the valve stem side of the intermediate flange structure.
    Type: Application
    Filed: December 23, 2016
    Publication date: October 25, 2018
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Norman K. Bucknor, Stephen B. Glover, Roy Douglas, Shane M. McKenna, Geoffrey McCullough, Jonathan Patty
  • Patent number: 7756229
    Abstract: A self-tuning filter is disclosed. The self-tuning filter includes a digital clocking signal and an input coupled to the digital clocking signal, whereby the input reads a value incident on the input when the digital clocking signal changes to a predetermined state. A clock-tunable filter is, furthermore, coupled to the digital clocking signal so that the frequency of the clock-tunable filter is adjusted in relation to a sampling frequency at which the digital clocking signal operates. The self-tuning filter may be applied to an input of a data acquisition unit and applied to an input having a variable sampling frequency. A method of controlling the frequency of a clock-tunable filter is also disclosed.
    Type: Grant
    Filed: January 11, 2007
    Date of Patent: July 13, 2010
    Assignee: OPTIMUM Power Technology, L.P.
    Inventors: Robert Douglas, Geoffrey McCullough
  • Publication number: 20070116167
    Abstract: A self-tuning filter is disclosed. The self-tuning filter includes a digital clocking signal and an input coupled to the digital clocking signal, whereby the input reads a value incident on the input when the digital clocking signal changes to a predetermined state. A clock-tunable filter is, furthermore, coupled to the digital clocking signal so that the frequency of the clock-tunable filter is adjusted in relation to a sampling frequency at which the digital clocking signal operates. The self-tuning filter may be applied to an input of a data acquisition unit and applied to an input having a variable sampling frequency. A method of controlling the frequency of a clock-tunable filter is also disclosed.
    Type: Application
    Filed: January 11, 2007
    Publication date: May 24, 2007
    Inventors: Robert Douglas, Geoffrey McCullough
  • Publication number: 20020122519
    Abstract: A self-tuning filter is disclosed. The self-tuning filter includes a digital clocking signal and an input coupled to the digital clocking signal, whereby the input reads a value incident on the input when the digital clocking signal changes to a predetermined state. A clock-tunable filter is, furthermore, coupled to the digital clocking signal so that the frequency of the clock-tunable filter is adjusted in relation to a sampling frequency at which the digital clocking signal operates. The self-tuning filter may be applied to an input of a data acquisition unit and applied to an input having a variable sampling frequency. A method of controlling the frequency of a clock-tunable filter is also disclosed.
    Type: Application
    Filed: March 1, 2002
    Publication date: September 5, 2002
    Applicant: Optimum Power Technology, L.P.
    Inventors: Robert Douglas, Geoffrey McCullough