Patents by Inventor Gary G. Holliday

Gary G. Holliday 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).

  • Wheel cylinder boot with annular rings
    Patent number: 5219052
    Abstract: The present invention provides a vehicle wheel cylinder for a drum type brake. The sealing boot which seals the wheel cylinder frame and piston is provided in a preferred embodiment with annular rings which help protect the integrity of the sealed relationship of the annular boot with the bore of the wheel cylinder against damage which can be caused by contact of the sealing boot with a web of a brake shoe.
    Type: Grant
    Filed: January 24, 1992
    Date of Patent: June 15, 1993
    Assignee: General Motors Corporation
    Inventors: Michael W. Fanelli, Gary G. Holliday, John R. Vallo, Jr.
  • Unispring drum brake assembly
    Patent number: 5159998
    Abstract: A drum brake is provided of the leading-trailing shoe type in which a single piece spring installed as a part of the assembly holds down the brake shoe assemblies against the backing plate and also retracts the shoes after brake actuation. The single piece spring also retains the lower ends of the shoes against the anchor plate. This arrangement eliminates the need for separate shoe hold-down springs and separate upper and lower return springs, resulting in a significant reduction in parts and labor for assembly.
    Type: Grant
    Filed: August 2, 1991
    Date of Patent: November 3, 1992
    Assignee: General Motors Corporation
    Inventors: Douglas M. Copp, Robert W. Hyde, Frank W. Brooks, Sr., Gary G. Holliday, Michael W. Fanelli