Patents by Inventor Kurt Ruehle

Kurt Ruehle 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).

  • Disc brake cylinder groove with a recess consisting of three sector surfaces
    Patent number: 5325940
    Abstract: A disc brake having a brake caliper provided with a hydraulic actuating device including a brake cylinder and a brake piston. The brake piston is sealed relative to the brake cylinder by way of a sealing ring arranged in a surrounding annular groove of the brake cylinder. The annular groove is provided with a recess arranged in the transitional area between a groove wall and the cylinder surface. The recess is confined by at least three surrounding conical surfaces whose angles towards the cylinder surface increase progressively, starting from the surface which borders on the cylinder surface up to the surface which borders on the groove wall.
    Type: Grant
    Filed: February 1, 1993
    Date of Patent: July 5, 1994
    Assignee: Alfred Teves GmbH
    Inventors: Helmut Rueckert, Kurt Ruehle