Patents by Inventor John M. Cullum

John M. Cullum 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).

  • Single-powered underlift towing apparatus
    Patent number: 5354167
    Abstract: An improved lifting and towing apparatus using a single hydraulic cylinder powering the rotation of a boom to lift a vehicle to be towed or to fold and store the apparatus through the use of a double pivot. The double pivot allows the apparatus to efficiently lift the towed vehicle while minimizing boom overhang when in the folded-stored position, and maximizing ground clearance. The present invention may be used with underlift equipment of various types and sizes, including light and heavy duty equipment, and both wheel and frame-lift systems.
    Type: Grant
    Filed: September 13, 1993
    Date of Patent: October 11, 1994
    Assignee: Vulcan International, Inc.
    Inventors: John M. Cullum, Hans G. Ogren
  • Single-powered underlift towing apparatus
    Patent number: 5284415
    Abstract: An improved lifting and towing apparatus using a single hydraulic cylinder powering the rotation of a boom to lift a vehicle to be towed or to fold and store the apparatus through the use of a double pivot. The double pivot allows the apparatus to efficiently lift the towed vehicle while minimizing boom overhang when in the folded-stored position, and maximizing ground clearance. The present invention may be used with underlift equipment of various types and sizes, including light and heavy duty equipment, and both wheel and frame-lift systems.
    Type: Grant
    Filed: June 3, 1992
    Date of Patent: February 8, 1994
    Assignee: Vulcan International, Inc.
    Inventors: John M. Cullum, Hans G. Ogren