Patents by Inventor Phillip H. Clark

Phillip H. Clark 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).

  • Apparatus for unlocking a bogie on a tractor-trailer rig
    Patent number: 5199732
    Abstract: A pneumatically operated apparatus is provided for automatically disengaging the bogie pins from the trailer rails of a tractor-trailer rig. The apparatus is designed to be retrofit to existing truck trailer and bogie assemblies and to work along side the conventional manual pin retracting mechanisms of the bogie assemblies. The apparatus includes safety features that prevent the apparatus from retracting the bogie pins of the trailer and bogie assembly when the emergency brakes of the assembly have not been engaged. The apparatus is also provided with safety features that automatically control the bogie pins to reengage in the holes of the trailer rails upon disengagement of the emergency brakes of the tractor-trailer rig.
    Type: Grant
    Filed: August 2, 1991
    Date of Patent: April 6, 1993
    Assignee: Herbert Lands, Inc.
    Inventors: Herbert D. Lands, Phillip H. Clark