Patents by Inventor Paul D. Swanson

Paul D. Swanson 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).

  • Manure transfer pump
    Patent number: 4278408
    Abstract: A manure transfer pump with a cylinder, a piston reciprocable in the cylinder, a connecting rod connected to a mid section of the piston and a gate assembly pivotally mounted inside the piston between the axis of the connecting rod connection and the rod end of the piston. In operation, the gate assembly swings open during a return stroke and allows manure to pass through the piston. On a pumping stroke, the gate assembly closes and manure is forced out the discharge end of the cylinder and sucked in the inlet end at the same time.
    Type: Grant
    Filed: September 10, 1979
    Date of Patent: July 14, 1981
    Assignee: Badger Northland Inc.
    Inventors: William L. Rammer, Paul D. Swanson