Patents by Inventor Edwin E. McKeen, Sr.

Edwin E. McKeen, Sr. 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).

  • Pneumatic ramp for vehicle leveling
    Patent number: 3990681
    Abstract: A pneumatically inflatable ramp having elastically resilient material forming the periphery of a wedge defining an enclosed internal air chamber with a protective upper surface to support a vehicle tire and a manually adjustable valve to adjustably regulate inflation. The device is pre-inflated to its normal ramp shape, a vehicle wheel to be leveled positioned thereon and air then removed from the ramp to bring the supported tire to the desired level position.
    Type: Grant
    Filed: January 29, 1976
    Date of Patent: November 9, 1976
    Inventor: Edwin E. McKeen, Sr.