Patents by Inventor Chrys O. DeLisser

Chrys O. DeLisser 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).

  • Patent number: 5503421
    Abstract: A rotatable fifth wheel mechanism for use on converter dollies, truck tractors, and permanently attached dollies. The mechanism includes: a fifth wheel supported on a frame for rotation about a vertical axis; and a clutch secured between the fifth wheel and the frame, to control rotation of the fifth wheel relative to the frame. The clutch includes a drum secured to the fifth wheel, friction pad completely surrounding the drum and an inflatable bladder for applying pressure to the friction pad. The fifth wheel mechanism also includes apparatus for increasing or decreasing the pressure in the bladder to selectively vary the engagement force between the drum and friction pads. The apparatus for selectively increasing or decreasing pressure includes at least a pair of electrically operated air valves.
    Type: Grant
    Filed: July 6, 1993
    Date of Patent: April 2, 1996
    Inventors: Chrys O. DeLisser, Thomas O. Summers