Patents by Inventor Staffan I. Kaempe

Staffan I. Kaempe 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).

  • Bi-rotational pump/hydraulic actuator
    Patent number: 6979185
    Abstract: A novel bi-rotational pump adapted to pump fluid in either of two directions by reason of construction inclusive of passageways and an array of check valves and pilot pistons which cooperate in one direction and in another way in the other direction.
    Type: Grant
    Filed: July 26, 2001
    Date of Patent: December 27, 2005
    Inventor: Staffan I. Kaempe
  • Bi-rotational pump/hydraulic actuator
    Publication number: 20020127126
    Abstract: A novel bi-rotational pump adapted to pump fluid in either of two directions by reason of construction inclusive of passageways and an array of check valves and pilot pistons which cooperate in one direction and in another way in the other direction.
    Type: Application
    Filed: July 26, 2001
    Publication date: September 12, 2002
    Inventor: Staffan I. Kaempe
  • Pressure clamped hydraulic pump
    Patent number: 6152715
    Abstract: A pump assembly comprises a hydraulic fluid pump having a housing assembled from a plurality of housing components that are pinned together rather than being clamped together by bolts. The pump is disposed in a cavity in a valve block so that the outlet fluid pressure from the pump is applied axially to the housing components to create a greater external axial force on the pump components than the internal axial force and thereby maintain the housing components in tight, sealing relation without the need for clamping bolts or other clamping means.
    Type: Grant
    Filed: January 30, 1998
    Date of Patent: November 28, 2000
    Inventors: Staffan I. Kaempe, Dennis G. Ewald