Patents by Inventor James C. Kramer

James C. Kramer 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).

  • Material handling vehicle having improved deadman control
    Patent number: 4336860
    Abstract: A material handling vehicle is disclosed which is in the form of a battery-operated lift truck having a drive unit including an electric motor and a brake and having a hydraulically operated power steering system controlled from a steering wheel on a vertically movable platform. A pump of the power steering system is operated by an electric motor which is energized through a deadman switch on the operator's platform. The brake of the drive unit is spring-biased toward an engaged condition and is released by a hydraulic cylinder supplied with fluid from the power steering pump, the brake being released by the hydraulic back pressure of the power steering system.
    Type: Grant
    Filed: January 24, 1980
    Date of Patent: June 29, 1982
    Assignee: The Prime-Mover Co.
    Inventors: Fred W. Noller, James C. Kramer