Patents by Inventor Robert D. Lerum

Robert D. Lerum 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).

  • Patent number: 4540301
    Abstract: A peristaltic-type pump having an intake which may be conveniently connected to a liquid coating source includes an impeller having a pair of rollers. Rotation of the impeller causes the rollers to progressively compress a length of tubing in the pump. This compression creates suction to draw the coating material into the pump and pressure to drive a flow of coating to a handle attached to an applicator. The handle includes flow control devices which may be selectively operated to supply coating to the applicator only as required. During periods of non-flow the coating pressure is sensed to deactivate the pump when the pressure exceeds a preselected limit. Deactivation of the pump saves energy and prolongs a life of the pump.
    Type: Grant
    Filed: December 16, 1983
    Date of Patent: September 10, 1985
    Inventors: Dennis E. Swanson, Robert D. Lerum
  • Patent number: D290067
    Type: Grant
    Filed: December 24, 1984
    Date of Patent: June 2, 1987
    Assignee: Power Flo Products Corp.
    Inventors: Dennis E. Swanson, Robert D. Lerum, Jerome A. Grunstad