Patents by Inventor Achim L. Kehrberger

Achim L. Kehrberger 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).

  • Hydraulic drive with fluid cooling by-pass line
    Patent number: 5072584
    Abstract: In a hydraulic drive, in which a double-acting working cylinder (10) is connected to the hydraulic power source by very long working lines (20, 22), it is proposed to connect a bypass line (36) containing a normally closed bypass valve (38) to the ends of the working lines (20, 22) nearest the cylinder. The bypass valve (38) is periodically opened to allow the fluid contained in the working lines (20, 22) to be completely replaced.
    Type: Grant
    Filed: September 7, 1989
    Date of Patent: December 17, 1991
    Inventors: Magnus Mauch, Achim L. Kehrberger