Patents by Inventor Heiner Fichtenbeiner

Heiner Fichtenbeiner 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: 4879945
    Abstract: In a hydraulic control device having at least one distributing valve (2m, ) connected upstream of a consuming point (35), a more effective energy utilization is achieved by means of a pressure step (D) provided for the input pressure of a second throttling point (15), which can be switched in stroke-dependent fashion by means of a control element (17, 17') of the distributing valve (2, 2') so that the maximum difference in pressure between the pump line pressure P.sub.(4) and the consumer pressure P.sub.(3) is only controlled shortly before the need of a high conveying amount. Before this the difference in pressure is kept smaller.
    Type: Grant
    Filed: July 5, 1988
    Date of Patent: November 14, 1989
    Assignee: Heilmeier & Wienlein, Fabrik fur Oel-Hydraulik GmbH & Co. KG
    Inventors: Rudolf Brunner, Heiner Fichtenbeiner