Patents by Inventor Leonard E. Mayfield

Leonard E. Mayfield 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).

  • Drive coupling with a ventable seal
    Patent number: 4750599
    Abstract: A drive coupling is movable to selectively engage and disengage a drive shaft with a final drive gear set. The coupling is sealingly disposed within a housing. To prevent the pressure within the housing from increasing or decreasing during movement of the coupling, a vent structure is formed on the drive coupling. The vent structure cooperates with the seal member to vent the housing during movement of the drive coupling to thereby ensure pressure balance within the housing.
    Type: Grant
    Filed: May 11, 1987
    Date of Patent: June 14, 1988
    Assignee: General Motors Corporation
    Inventors: Leonard E. Mayfield, Charles F. Huddleston, Jr.