Patents by Inventor Finn Wichstrøm

Finn Wichstrøm 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).

  • Method and valve device for counteracting harmful pressure pulses in a hydraulic system
    Patent number: 6516825
    Abstract: A method and a valve apparatus for counteracting harmful pressure pulses caused by rapid retardation of a liquid in a hydraulic system comprising a pump for the supply of liquid to a conduit stretch containing a non-liquid-filled volume. The valve apparatus comprises a main valve having an inlet connected to a reservoir for pressurised gas, a first valve chamber connected in use to said volume, and a regulating unit for controlling the supply of pressurised gas to the first chamber.
    Type: Grant
    Filed: July 20, 2001
    Date of Patent: February 11, 2003
    Assignees: Aker Maritime ASA, Ottestad Breathing Systems A/S
    Inventors: Nils T. Ottestad, Finn Wichstrøm