Patents by Inventor Wilfred St. Laurent

Wilfred St. Laurent 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).

  • Fluid operated pump
    Patent number: 4705458
    Abstract: A fluid operated pump comprising a housing including first and second cylinders. First and second pistons are rigidly fixed to each other and situated in their respective cylinders, the cylinders alternately receiving pressurized fluid for operating the pump. The pump includes novel valving means and novel seals.
    Type: Grant
    Filed: June 12, 1984
    Date of Patent: November 10, 1987
    Assignee: Bellofram Corporation
    Inventors: Wilfred St. Laurent, Christos Athanassiu