Patents by Inventor Oskar Zimmermann

Oskar Zimmermann 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).

  • Booster pump with bypass valve integrally formed in gasket
    Patent number: 5571000
    Abstract: A pump comprising a housing including first and second housing sections and a gasket between the first and second housing sections. The housing has a first pumping chamber, an inlet, an inlet passage in the housing leading from the inlet to the pumping chamber, an outlet and an outlet passage in the housing leading from the pumping chamber to the outlet. A pumping member is movable in the pumping chamber to pump fluid through the pump. Inlet and outlet check valves are provided in the inlet and outlet passages, respectively with each of the check valves including a movable valve element. The gasket forms a seal between the first and second housing sections. A bypass passages (140) in the housing leads from a location in the outlet passage downstream of the outlet check valve to a location in the inlet passage upstream of the inlet check valve.
    Type: Grant
    Filed: August 15, 1995
    Date of Patent: November 5, 1996
    Assignee: Shurflo Pump Manufacturing Co.
    Inventors: Oskar Zimmermann, Hal P. Voznick
  • Booster pump with sealing gasket including inlet and outlet check valves
    Patent number: 5476367
    Abstract: A pump comprising a housing including first and second housing sections and a gasket between the first and second housing sections. The housing has a first pumping chamber, an inlet, an inlet passage in the housing leading from the inlet to the pumping chamber, an outlet and an outlet passage in the housing leading from the pumping chamber to the outlet. A pumping member is movable in the pumping chamber to pump fluid through the pump. Inlet and outlet check valves are provided in the inlet and outlet passages, respectively with each of the check valves including a movable valve element. The gasket forms a seal between the first and second housing sections and includes at least one of the valve elements for the check valves.
    Type: Grant
    Filed: July 7, 1994
    Date of Patent: December 19, 1995
    Assignee: Shurflo Pump Manufacturing Co.
    Inventors: Oskar Zimmermann, Lloyd D. Golobay, Hal P. Voznick