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Inventor:
A'Hearn; Michael A.
Address:
Shorewood, IL
No. of patents:
7
Patents:












Patent Number Title Of Patent Date Issued
6955115 Hydraulic circuit having pressure equalization during regeneration October 18, 2005
A fluid system is provided wherein two different fluid circuits are connected in parallel with a single source of pressurized fluid and the two fluid circuits can function together even when one of the loads is lighter than the other. This is accomplished by having the lightly loaded
6357230 Hydraulic ride control system March 19, 2002
A hydraulic ride control system is disclosed and adapted to control the ride of a machine having a load. The ride control includes an accumulator arrangement that is selectively connected with the actuator that is carrying the load to provide a cushion ride during traveling and to enable
6321534 Ride control November 27, 2001
A ride control system adapted for use in a fluid system of a machine to cushion the ride of the machine, the machine having a frame with an actuator arrangement disposed between the frame and a load to raise the load relative to the frame, the actuator arrangement having a raise port
6205781 Fluid control system including a work element and a valve arrangement for selectively supplying March 27, 2001
A fluid control system including a valve arrangement operable for selectively, controllably supplying pressurized fluid to a work element of the system from at least two pressurized fluid sources depending on load conditions on the pressurized fluid sources. The valve arrangement is
6173639 Fluid control system having float control January 16, 2001
A fluid control circuit providing a float capability for a double-acting actuator having first and second actuating chambers is provided. The fluid circuit includes signal controlled load check valves disposed between the actuating chambers and a directional control valve. The directiona
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
5826487 Pressure control for a pair of parallel hydraulic circuits October 27, 1998
An unloader valve is connected to a pump and has first and second ends, a priority flow port communicating with the first end and being connected to a first conduit connected to a first hydraulic circuit, an excess flow port communicating with a tank, and a spring disposed at the second










 
 
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