Patents by Inventor Stephen P. Graber

Stephen P. Graber 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).

  • Friction control mechanism
    Patent number: 6314832
    Abstract: Apparatus to provide controlled frictional resistance to cyclic displacement of a member, comprising a base, a friction part frictionally and slidably engagable with base, in response to displacement of member, at least one spring element transmitting force acting to hold part in frictional engagement with the base, one of friction part and base having a friction surface engaged with the other of part and base, and characterized in that the force to overcome friction between the base and part remains substantially constant over a large number of displacement cycles of the member.
    Type: Grant
    Filed: July 30, 1999
    Date of Patent: November 13, 2001
    Assignee: Adams Rite Manufacturing Co.
    Inventors: Stephen P. Graber, Stephen A. Harris