Patents by Inventor David L. Whitmarsh

David L. Whitmarsh 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 element for clutch
    Patent number: 4846329
    Abstract: A friction element to be secured to a hub member in a friction clutch, comprises a back plate (21) provided with a friction facing (23) on at least one side thereof, the friction facing (23) being of trefoil shape with a first lobe (24) extending radially inwardly and second and third lobes (25, 26) extending radially outwardly and in opposite circumferential directions from the first lobe. The shape of the friction facing provides a desirable distribution of material while using a minimum quantity thereof.
    Type: Grant
    Filed: March 21, 1988
    Date of Patent: July 11, 1989
    Assignee: GKN Sheepbridge Limited
    Inventors: John Kettell, David L. Whitmarsh