Patents by Inventor Jeffrey M. DePayva

Jeffrey M. DePayva 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).

  • VARIABLE DISPLACEMENT PUMP WITH AN ANTI-STICTION DEVICE
    Publication number: 20090084360
    Abstract: A spacer for use with, and to prevent or reduce the occurrence of stiction in, a fluid device such as a pump. The spacer has a generally ring-shaped body, which has first and second facing surfaces separated by a thickness. The spacer is positioned between a movable member of the pump and a stationary member of the pump such that the first facing surface of the spacer is contactable with the movable member and the second facing surface is contactable with the stationary member. The spacer has at least a fluid receiving groove formed in at least one of the first and second facing surfaces.
    Type: Application
    Filed: October 1, 2007
    Publication date: April 2, 2009
    Applicant: CATERPILLAR INC.
    Inventors: Jeffrey M. DePayva, Daniel R. Puckett, Gregory William Hefler, Todd A. Johnson
  • Variable displacement pump with an anti-stiction device
    Patent number: 7509948
    Abstract: A spacer for use with, and to prevent or reduce the occurrence of stiction in, a fluid device such as a pump. The spacer has a generally ring-shaped body, which has first and second facing surfaces separated by a thickness. The spacer is positioned between a movable member of the pump and a stationary member of the pump such that the first facing surface of the spacer is contactable with the movable member and the second facing surface is contactable with the stationary member. The spacer has at least a fluid receiving groove formed in at least one of the first and second facing surfaces.
    Type: Grant
    Filed: October 1, 2007
    Date of Patent: March 31, 2009
    Assignee: Caterpillar Inc.
    Inventors: Jeffrey M. DePayva, Daniel R. Puckett, Gregory William Hefler, Todd A Johnson