Patents by Inventor J. Les Johnson

J. Les Johnson 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).

  • Low restriction fluid control valve
    Patent number: 4825907
    Abstract: A low restriction fluid control valve has a body (12) which a first inlet port (14) and first and second outlet ports (16, 18). The valve body has an internal cavity (24). A rectangular slide (50) having a circular aperture (52) is movable in said cavity. Movement of the slide places the outlet ports of the valve selectively in fluid communication with the inlet port through the circular aperture of the slide.
    Type: Grant
    Filed: June 21, 1988
    Date of Patent: May 2, 1989
    Assignee: Parker Hannifin Corporation
    Inventors: J. Les Johnson, John R. Hanning