Patents by Inventor Nystrom Per H. G.

Nystrom Per H. G. 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).

  • On-off valve fluid governed servosystem
    Patent number: 4416187
    Abstract: In a pulse modulated servosystem having solenoid activated on-off valves governing the amount of fluid in two variable volume chambers of a double-acting piston-cylinder unit any limitation of the accuracy due to inertia of the valves is eliminated by influencing both chambers in opposite directions.
    Type: Grant
    Filed: February 10, 1981
    Date of Patent: November 22, 1983
    Inventor: Nystrom Per H. G.