Patents by Inventor David A. Clemen

David A. Clemen 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).

  • Fuel flow means for portable space heaters
    Patent number: 4340362
    Abstract: A portable space heater having a deep fuel tank in conjunction with a fuel pump for raising the fuel to a predetermined height to feed an aspirating type nozzle incorporated in the fuel system and an adjusting valve means to control the flow of fuel to the siphon line connected to the nozzle. The fuel pump feeds the fuel from the tank to a predetermined level at which the aspirating nozzle will operate efficiently. The fuel line system also has a return line to the tank which allows any excess fuel in the lines to be appropriately returned to the tank.
    Type: Grant
    Filed: February 23, 1981
    Date of Patent: July 20, 1982
    Assignee: Ex-Cell-O Corporation
    Inventors: Clayton W. Chalupsky, David A. Clemen