Patents by Inventor Francis Tokarski

Francis Tokarski 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).

  • Variable displacement vane pump with vane tip relief
    Patent number: 5716201
    Abstract: A variable displacement vane pump having a vaned rotor adjustably contained within a cam member for rotation between fuel inlet and fuel discharge arcs. Adjacent vanes form enclosed fuel bucket areas which are expanded and axially-supplied with fuel in the fuel inlet arc and are contracted and axially-discharge the fuel in the fuel discharge arc. Fuel circulation is improved by providing a central recess at each vane tip and/or a central groove in the cam surface to prevent trapping, stagnation and overheating of fuel at the centerpoints of the bucket areas, which overheating can result in expansion of the vane tips, scoring of the cam surface and pump failure.
    Type: Grant
    Filed: July 31, 1995
    Date of Patent: February 10, 1998
    Assignee: Coltec Industries Inc.
    Inventors: Robert Peck, Martin Thomas Books, Francis Tokarski, Bernard J. Bisson, Raymond D. Zagranski, Mihir C. Desai