Patents by Inventor Normann S. Jacobsen

Normann S. Jacobsen 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: 5806838
    Abstract: The hydraulic system is used to drive a hydraulic motor for operation in a quartering direction for lowering of cargo as well as for operating the drive motor in a lifting direction. The hydraulic system employs an oil-gas accumulator which accumulates pressure oil during a quartering mode of operation of the drive motor. During a subsequent lifting mode of operation of the drive motor, stored pressure oil is used for the operation of the drive motor.
    Type: Grant
    Filed: May 23, 1997
    Date of Patent: September 15, 1998
    Inventors: Atle Kalve, Normann S. Jacobsen