| Patent Number |
Title Of Patent |
Date Issued |
| 6312238 |
Hydraulically retractable hydraulic motor |
November 6, 2001 |
| A method and apparatus for hydraulically engaging and disengaging a hydraulic motor comprising a rotor and a stator. |
| 5626345 |
Dual groove seal |
May 6, 1997 |
| A method and apparatus for reducing the wear within a mechanical apparatus having first and second adjacent, sealable surfaces which move relative to each other and having a seal between them. |
| 5470215 |
Wear resistant vane-type fluid power converter |
November 28, 1995 |
| A fluid power converter, such as a vane-type hydraulic motor comprising a rotor circumferentially surrounded by a stator, the opposing peripheral surfaces thereof creating an annular space therebetween. The opposing surfaces of the rotor and stator each exhibit a plurality of spaced apar |
| 5261801 |
Method and apparatus for disengaging hydraulic motors |
November 16, 1993 |
| A method and apparatus for disengaging and reengaging a hydraulic motor from the mechanism it is driving. The hydraulic motor includes a shaft that is longitudinally movable relative to the rotor. Longitudinally moving the shaft disconnects the drive mechanism from the rotor. In one |
| 5241823 |
Hydraulic power system having first and second power converters |
September 7, 1993 |
| A hydraulic power system having first and second hydraulic power converters in which the speed of the second power converter is proportional to the speed of the first power converter. The first hydraulic power converter includes a plurality of hydraulic power producing elements. At least |
| 4599058 |
Vane slots for a fluid power converter |
July 8, 1986 |
| In a fluid power converter, such as a hydraulic pump or motor, having a rotor and stator with vanes in both the rotor and stator, the improvement in the vane slots on one or both of the rotor and stator in which a ramp is provided on both sides of the open ends of each slot. The ramps ar |
| 3976407 |
Fluid power converter side seal |
August 24, 1976 |
| A fluid power converter having a rotor and stator rotatable with respect to one another about a common axis and having coacting sides in which an annular seal is positioned between the coacting sides for limiting fluid flow therethrough thereby providing increased efficiency and maintain |
| 3957404 |
Vanes for fluid power converter |
May 18, 1976 |
| In a fluid power converter, such as a hydraulic pump or motor, having a rotor and stator with vanes in both the rotor and stator, the improvement in the vanes which are generally rectangular in cross section in which the outer edges of the vanes have a convex curvature of an extent to pr |
