Patents by Inventor Kenneth M. Andrews

Kenneth M. Andrews 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).

  • Valve assemblies to supply fluid pressure to components in multiple transmission operating modes
    Patent number: 11512720
    Abstract: Transmissions, filter assemblies for transmissions, and valve assemblies for transmissions are disclosed herein. A transmission includes an input shaft, an output shaft, and a hydraulic system. The input shaft is configured to receive rotational power supplied by a drive unit. The output shaft is coupled to the input shaft and configured to provide rotational power supplied to the input shaft to a load. The hydraulic system is configured to supply fluid to one or more fluid demand devices coupled between the input shaft and the output shaft in one or more operating modes of the transmission. The hydraulic system includes a filter assembly having a filter element and a valve assembly fluidly coupled to the filter element.
    Type: Grant
    Filed: October 28, 2019
    Date of Patent: November 29, 2022
    Assignee: ALLISON TRANSMISSION, INC.
    Inventor: Kenneth M. Andrews
  • VALVE ASSEMBLIES TO SUPPLY FLUID PRESSURE TO COMPONENTS IN MULTIPLE TRANSMISSION OPERATING MODES
    Publication number: 20210123463
    Abstract: Transmissions, filter assemblies for transmissions, and valve assemblies for transmissions are disclosed herein. A transmission includes an input shaft, an output shaft, and a hydraulic system. The input shaft is configured to receive rotational power supplied by a drive unit. The output shaft is coupled to the input shaft and configured to provide rotational power supplied to the input shaft to a load. The hydraulic system is configured to supply fluid to one or more fluid demand devices coupled between the input shaft and the output shaft in one or more operating modes of the transmission. The hydraulic system includes a filter assembly having a filter element and a valve assembly fluidly coupled to the filter element.
    Type: Application
    Filed: October 28, 2019
    Publication date: April 29, 2021
    Inventor: Kenneth M. Andrews
  • Backup alignment system for an internal mode switch
    Patent number: 7574938
    Abstract: A gear selector assembly includes a selector shaft, an internal mode switch mounted on the selector shaft, and a detent lever mounted on the selector shaft and rotatable with the selector shaft. The detent lever is indexed relative to the internal mode switch. A spring assembly is in engagement with the detent lever. The spring assembly has a first member that engages the internal mode switch to prevent the internal mode switch from rotating and has a second member that engages the internal mode switch to prevent the internal mode switch from rotating if the first member does not engage the internal mode switch.
    Type: Grant
    Filed: April 10, 2007
    Date of Patent: August 18, 2009
    Assignee: GM Global Technology Operations, Inc.
    Inventors: Kenneth M. Andrews, Shaun A. Wilhelm
  • BACKUP ALIGNMENT SYSTEM FOR AN INTERNAL MODE SWITCH
    Publication number: 20080250890
    Abstract: A gear selector assembly is provided having a selector shaft, an internal mode switch mounted on the selector shaft, and a detent lever mounted on the selector shaft and rotatable with the selector shaft. The detent lever is indexed relative to the internal mode switch. A spring assembly is in engagement with the detent lever. The spring assembly has a first member that engages the internal mode switch to prevent the internal mode switch from rotating and has a second member that engages the internal mode switch to prevent the internal mode switch from rotating if the first member does not engage the internal mode switch.
    Type: Application
    Filed: April 10, 2007
    Publication date: October 16, 2008
    Applicant: GM Global Technology Operations, Inc.
    Inventors: KENNETH M. ANDREWS, Shaun A. Wilhelm