Patents by Inventor Helmut Hoppmann

Helmut Hoppmann 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).

  • Vehicle fuel tank having vented internal fuel pump
    Patent number: 4309155
    Abstract: A fuel pump assembly is designed for mounting in the interior of a vehicle fuel tank. The assembly includes a reserve tank and a fuel pump mounted within the reserve tank with a noise dampening cylindrical intermediate layer. An intake chamber is formed by a filter screen which is mounted in the reserve tank surroundng the inlet of the fuel pump. A vent channel is provided bypassing the intermediate layers and connecting the intake chamber with a vent conduit for venting gases from the intake chamber of the fuel pump.
    Type: Grant
    Filed: February 11, 1980
    Date of Patent: January 5, 1982
    Assignee: Volkswagenwerk Aktiengesellschaft
    Inventors: Otto Heinz, Helmut Hoppmann, Bodo Henning
  • Vehicle fuel tank with internal fuel pump
    Patent number: 4306844
    Abstract: A vehicle fuel tank is provided with a pump mounted to the bottom of the tank. The outlet line leads from the pump in a curved path to a cover on the top wall of the tank. This arrangement facilitates assembly of the tank without difficulty relating to connection of the outlet line on account of variations in overall tank dimensions.
    Type: Grant
    Filed: May 12, 1980
    Date of Patent: December 22, 1981
    Assignee: Volkswagenwerk Aktiengesellschaft
    Inventors: Heinz Otto, Helmut Hoppmann
  • Vehicle fuel tank having vented internal fuel pump
    Patent number: 4212600
    Abstract: A fuel pump assembly is designed for mounting in the interior of a vehicle fuel tank. The assembly includes a reserve tank and a fuel pump mounted within the reserve tank with a noise dampening cylindrical intermediate layer. An intake chamber is formed by a filter screen which is mounted in the reserve tank surrounding the inlet of the fuel pump. A vent channel is provided bypassing the intermediate layers and connecting the intake chamber with a vent conduit for venting gases from the intake chamber of the fuel pump.
    Type: Grant
    Filed: May 25, 1978
    Date of Patent: July 15, 1980
    Assignee: Volkswagenwerk Aktiengesellschaft
    Inventors: Heinz Otto, Helmut Hoppmann, Bodo Henning