Patents by Inventor Kenneth W. Sheffer

Kenneth W. Sheffer 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).

  • Piston pump having inertial rollers mounted for radial movement
    Patent number: 4541781
    Abstract: A rotary fluid pump is disclosed which uses rotating rollers running along a circular track to successively depress a plurality of lever arms which in turn operate pistons in a like number of pumps to thereby pump a fluid. The rollers are free to rotate on a frame, which frame rotates co-axially within the track. The rollers are carried on sleeves which slide on arms extending from the hub of the frame, such that the rollers are free to move radially outwardly, as well as inwardly, in response to inertial (i.e., centrifugal) forces associated with the rotation of the frame.
    Type: Grant
    Filed: January 11, 1984
    Date of Patent: September 17, 1985
    Inventor: Kenneth W. Sheffer