Patents by Inventor Fredric A. Ensworth

Fredric A. Ensworth 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).

  • Reverse drive oil pump
    Patent number: 5476373
    Abstract: Lubricant is pumped into a lubrication system by an oil pump. Preferably the lubricant is drawn into the pump from an unagitated source. An eccentric pump rotor is received on the crankshaft and has a circumferentially extending recess. A radially extending drive pin is secured in the crankshaft and coacts with the ends of the recess to position the rotor in accordance with the direction of rotation of the shaft.
    Type: Grant
    Filed: November 14, 1994
    Date of Patent: December 19, 1995
    Assignee: Carrier Corporation
    Inventors: Michael N. Mantooth, Fadi S. Maalouf, Fredric A. Ensworth, Martin C. Bezon