Patents Assigned to Denison Hydraulics Inc.
  • Reclamation system for a hydraulic pump system
    Patent number: 5984315
    Abstract: A hydraulic pump system is provided with a leakage fluid reclamation sub-system having connected eductor and fluid line elements that function to return hydraulic fluid leaked from around the system drive shaft to the reservoir of the hydraulic fluid pump.
    Type: Grant
    Filed: October 9, 1996
    Date of Patent: November 16, 1999
    Assignee: Denison Hydraulics Inc.
    Inventors: Michele Lee Burkhardt, Jack W. Wilcox
  • Axial piston pump
    Patent number: 5538401
    Abstract: A variable displacement axial piston pump has a plurality of piston bores each connected to an inwardly angled fill port. The fill ports extend from the piston bores inwardly to the working face of the barrel to reduce the diameter of the fill circle of a pump. This decreases the velocity that must be attained by incoming fluid to thereby increase the operating speed at which the pump may be driven where the pump is filled at atmospheric pressure.
    Type: Grant
    Filed: July 5, 1994
    Date of Patent: July 23, 1996
    Assignee: Denison Hydraulics Inc.
    Inventors: Larey D. Schaffner, Lawrence R. Geise, Jack W. Wilcox, Ellis H. Born
  • Control for a variable displacement axial piston pump
    Patent number: 5486097
    Abstract: A torque limiter control sets the limit of power which may be absorbed by a pump. A feedback system adjusts the displacement of the pump in responses to changes in the pressure of working fluid at the pump outlet to maintain a set power.
    Type: Grant
    Filed: January 26, 1995
    Date of Patent: January 23, 1996
    Assignee: Denison Hydraulics Inc.
    Inventor: Larey D. Schaffner