Patents by Inventor Rudolph Stegmann

Rudolph Stegmann 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).

  • Multi-purpose valve assembly
    Patent number: 4685310
    Abstract: A flow control valve in a unitary casing has a seat for a manual stem valve on one side of the valve opening and a seat for a check valve on the other side, the check valve being lightly urged toward closing position against differential pressure in the flow stream and being receptive to external pressure control.
    Type: Grant
    Filed: October 14, 1986
    Date of Patent: August 11, 1987
    Assignee: Frick Company
    Inventors: Rudolph Stegmann, Zoltan A. Mandy
  • Single casing, multiple duty valve
    Patent number: 4227380
    Abstract: A single casing valve is especially adapted for the inlet of a rotary screw type compressor, the valve having provision for both a manual and an automatic shut-off, the latter responsive to discharge pressure for closing the inlet, and having a strainer in the suction line which is downstream from the valve seat in order that the strainer may be changed with the compressor isolated from the inlet source.
    Type: Grant
    Filed: November 9, 1979
    Date of Patent: October 14, 1980
    Assignee: Frick Company
    Inventors: F. Michael Laucks, Rudolph Stegmann