Patents by Inventor Reinhold Luhmann

Reinhold Luhmann 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).

  • Control for liquid ring vacuum pumps
    Patent number: 4655688
    Abstract: A closed loop control is provided to control pressure and/or temperature in a system where one or more liquid ring vacuum pumps evacuate a recipient. The suction ability of the liquid ring vacuum pumps is controlled either by speed control, operating water temperature, switching-on and -off of pumps or bypass-air. Simultaneous control of all operating characteristics is achieved with a programmable electronic controller.
    Type: Grant
    Filed: May 30, 1985
    Date of Patent: April 7, 1987
    Assignee: ITT Industries, Inc.
    Inventors: Heinz Bohn, Werner Fink, Reinhold Luhmann