Patents by Inventor Dennis A. Higley

Dennis A. Higley 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).

  • Priming and injection valve for analytical instruments
    Patent number: 5616300
    Abstract: A valve (10) is used to introduce fluid from a syringe (22) into the inlet (88) of the pump of an HPLC instrument (12). The valve includes a valve body (14) that is connected to the HPLC instrument for fluid flow communication with the instrument inlet. A valve rotor (16) is rotatably engaged with the valve body. A collar fitting (18) included on the valve rotor is connectable to the syringe. The syringe acts as a valve lever, and is displaceable to rotate the valve rotor about an axis of rotation (32) between an "off" position, in which fluid flow between the syringe and the HPLC instrument inlet is prevented, and an "on" position, in which fluid flow between the syringe and the HPLC instrument inlet is permitted. The valve enables one-handed priming operation.
    Type: Grant
    Filed: May 24, 1995
    Date of Patent: April 1, 1997
    Assignee: Optimize Technologies, Inc.
    Inventors: Douglas W. Ford, Robert W. Todd, Quinn E. Trammell, Dennis A. Higley