Patents by Inventor Rainer Napfel

Rainer Napfel 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).

  • Valve system for supplying fluid from a pair of fluid pressure sources to a load
    Patent number: 5261232
    Abstract: The invention relates to a valve system for supplying fluid from a pair of fluid pressure sources to a load. A feed valve is provided which feeds--when required--a partial flow of the second fluid pressure source into the feed line of the load which is connected to the first fluid pressure source through a directional control valve. The feed valve comprises a pressure-compensating valve to control the volume of the partial flow and a switching valve to automatically open the pressure-compensating valve when required.
    Type: Grant
    Filed: August 31, 1992
    Date of Patent: November 16, 1993
    Assignee: Mannesmann Rexroth GmbH
    Inventors: Jacques Maffini, Rainer Napfel