Patents by Inventor Brad E. Bartley

Brad E. Bartley 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 discharge fuel pump
    Patent number: 7470117
    Abstract: A pump has a housing defining a first pumping chamber and a second pumping chamber. The pump also has a first plunger and a second plunger. The pump additionally has at least one driver operatively engaged with at least one of the first and second plungers to move the at least one of the first and second plungers between first and second end positions. The pump further has a common spill passageway fluidly connectable to the first and second pumping chambers and a selector valve disposed between the common spill passageway and the first and second pumping chambers. The selector valve has a body and a ball valve member operably disposed within the body. The ball valve member is movable between a first and a second ball valve member position to selectively fluidly connect the first and second pumping chambers to the common spill passageway.
    Type: Grant
    Filed: November 30, 2004
    Date of Patent: December 30, 2008
    Assignee: Caterpillar Inc.
    Inventors: Scott F. Shafer, Brad E. Bartley, Kevin Charles Reynolds, Gregory W. Hefler