| Patent Number |
Title Of Patent |
Date Issued |
| 6161467 |
Fluid control system with regeneration |
December 19, 2000 |
| A fluid control system including a control valve providing a simple, easy to use regeneration capability in association with a pump, a tank, and a double acting actuator having a first actuating chamber and a second actuating chamber. The control valve has a first actuating chamber port |
| 5876185 |
Load sensing pump control for a variable displacement pump |
March 2, 1999 |
| A variable displacement pump has a discharge passage and a displacement controller disposed to decrease pump displacement in response to an increasing pressure signal and to increase pump displacement in response to a decreasing pressure signal. A load sensing pump control for the pump |
| 5876184 |
Electrohydraulic pressure regulating valve |
March 2, 1999 |
| An electrohydraulic pressure regulating valve comprises a variable orifice disposed between a supply port and a control port and has a fixed size vent orifice disposed downstream of the variable orifice and in parallel with the control port to reduce the flow forces acting on the spool s |
| 5578904 |
Method and apparatus for determining the position of an armature of an electromagnetic actuator |
November 26, 1996 |
| An apparatus for determining the position of an armature of an electromagnetic actuator having a coil, the armature being movable to and between first and second positions in response to a current flowing in the coil. The apparatus includes circuitry for measuring the magnitude of cu |
| 5520262 |
Electrohydraulic steering system |
May 28, 1996 |
| An electrohydraulic steering system has a three position pilot operated directional valve disposed between a variable displacement pump and a pair of steer cylinders. The directional valve controls the direction of fluid flow from the pump to the steer cylinders while the displacement of |
| 5497692 |
Electrohydraulic steering system |
March 12, 1996 |
| An electrohydraulic steering system has a pair of proportional valves for controlling displacement of a steering valve for normal steering functions. The proportional valves are selectively energized by a position sensor in response to rotation of a steering wheel. However, should an |
| 5489005 |
Electro-hydraulic steering system |
February 6, 1996 |
| In machines that are articulated in response to a steer input mechanism, it is many times necessary for the operator to make a steer input and then to make corrective adjustments in order to obtain the desired steer angle of the machine. In the subject invention, an electro-hydraulic ste |
| 5481187 |
Method and apparatus for determining the position of an armature in an electromagnetic actuator |
January 2, 1996 |
| Electromagnetic actuators having a coil and an armature are used in a number of applications in which it is useful to have an indication of the position of the armature with respect to the coil without the use of external sensors. Accordingly, an actuator control system is provided for |
| 5054599 |
End of fill detector for a hydraulic clutch |
October 8, 1991 |
| An apparatus is adapted to detect an end-of-fill condition of an actuator having a varying control volume, C. The apparatus includes a solenoid having a coil and an armature. The armature is movable relative to the coil in response to energization of the coil. A control valve delivers a |
| 5040648 |
Electrohydraulic control device for a drive train of a vehicle |
August 20, 1991 |
| A vehicle such as an earthmoving wheel loader has an engine, a torque converter having an impeller element, a reactor element and a turbine element, and an input clutch connected between the engine and the impeller element. An electrohydraulic control device is provided to controllably |
