Patents by Inventor Scott C. Graham

Scott C. Graham 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).

  • Hydraulic control valve
    Patent number: 10641297
    Abstract: A new means of achieving a valve float position in a closed centered hydraulic control valve. The valve has a main spool position whereby pressure compensator load sense control pressure is drained to tank through the main spool. Secondly, a pin acts on the pressure compensator to prevent the main pump flow from reaching the main section spool. Finally, the new spool position adds a connection from the consumer to tank, enabling a float position.
    Type: Grant
    Filed: August 17, 2018
    Date of Patent: May 5, 2020
    Inventors: Roger A. Webel, Evan D. Bialosky, Scott C. Graham, Frank C. Karsten, Daniel S. Lacey, Richard F. Sailer, Jr.
  • HYDRAULIC CONTROL VALVE
    Publication number: 20200056635
    Abstract: A new means of achieving a valve float position in a closed centered hydraulic control valve. The valve has a main spool position whereby pressure compensator load sense control pressure is drained to tank through the main spool. Secondly, a pin acts on the pressure compensator to prevent the main pump flow from reaching the main section spool. Finally, the new spool position adds a connection from the consumer to tank, enabling a float position.
    Type: Application
    Filed: August 17, 2018
    Publication date: February 20, 2020
    Inventors: Roger A. Webel, Evan D. Bialosky, Scott C. Graham, Frank C. Karsten, Daniel S. Lacey, Richard F. Sailer, JR.