Patents by Inventor Bruce E. Gunzenhauser

Bruce E. Gunzenhauser 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).

  • Swing cylinder oscillation control circuit and valve for oscillating booms
    Patent number: 6666125
    Abstract: A swing cylinder oscillation control circuit and valve for oscillating booms connects two hydraulic cylinders with a shuttle valve and two check valves to provide the higher cylinder pressure to a fluid inlet and a lower cylinder pressure to a fluid outlet of a fast-opening and a slow-closing check valve. The fast-opening and slow-closing check valve uses a poppet and spring to set a valve opening pressure and uses internal flow connections to a large diameter piston that works with mechanically adjustable piston and poppet strokes to control the time for valve closing.
    Type: Grant
    Filed: March 14, 2002
    Date of Patent: December 23, 2003
    Assignee: Sauer-Danfoss Inc.
    Inventor: Bruce E. Gunzenhauser
  • Swing cylinder oscillation control circuit and valve for oscillating booms
    Publication number: 20030172802
    Abstract: A swing cylinder oscillation control circuit and valve for oscillating booms connects two hydraulic cylinders with a shuttle valve and two check valves to provide the higher cylinder pressure to a fluid inlet and a lower cylinder pressure to a fluid outlet of a fast-opening and a slow-closing check valve. The fast-opening and slow-closing check valve uses a poppet and spring to set a valve opening pressure and uses internal flow connections to a large diameter piston that works with mechanically adjustable piston and poppet strokes to control the time for valve closing.
    Type: Application
    Filed: March 14, 2002
    Publication date: September 18, 2003
    Applicant: Sauer-Danfoss Inc.
    Inventor: Bruce E. Gunzenhauser