Patents by Inventor Stephen G. Palmer

Stephen G. Palmer 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).

  • Non-cup cutting master cylinder
    Patent number: 4240258
    Abstract: A master cylinder including a housing having a fluid reservoir and a cavity. A first piston is movable in the cavity. A sealing member is positioned for movement with the first piston. A fluid chamber is formed in the cavity ahead of the first piston. A second piston is movable within the first piston into and out of sealing engagement with the sealing member to close and open, respectively, a fluid path between the fluid reservoir and the fluid chamber.
    Type: Grant
    Filed: November 7, 1978
    Date of Patent: December 23, 1980
    Assignee: Wagner Electric Corporation
    Inventors: Richard W. Angert, Stephen G. Palmer