Motors: expansible chamber type – With motive fluid valve – Relatively movable serial valves
Patent
1997-04-18
1999-08-03
Richter, Sheldon J.
Motors: expansible chamber type
With motive fluid valve
Relatively movable serial valves
91448, F15B 1302
Patent
active
059310782
ABSTRACT:
A hydrostatic drive system has a demand-responsive pump and at least one hydraulic circuit or consumer connected to it. Each consumer can be actuated by a directional control valve which acts as a throttle in intermediate positions. For the distribution of the delivery flow independently of the load, a pressure-maintaining valve is located upstream of the directional control valve. The pressure-maintaining valve can be controlled by a differential signal formed from a load pressure signal and a delivery pressure signal. The load pressure signal to the pressure-maintaining valve of the consumer can be changed by the output signal of a pressure reducing valve. One control surface of the pressure-maintaining valve can be pressurized with the output-side pressure of the pressure reducing valve which is located in a load pressure line. The output pressure of the pressure reducing valve can be adjusted by a spring and a variable control pressure.
REFERENCES:
patent: 4738279 (1988-04-01), Kropp
patent: 5083430 (1992-01-01), Hirata et al.
patent: 5146747 (1992-09-01), Sugiyama et al.
patent: 5533334 (1996-07-01), Takeuchi et al.
Linde Aktiengesellschaft
Richter Sheldon J.
LandOfFree
Hydrostatic drive system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Hydrostatic drive system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydrostatic drive system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-840028