Fluid pressure control circuit

Details Fluid pressure control circuit Fluid pressure control circuit

2006-03-14

2006-03-14

Lazo, Thomas E. (Department: 3745)

Power plants

Pressure fluid source and motor

Having condition responsive control in a system of distinct...

C060S450000, C091S433000

Reexamination Certificate

active

07010911

ABSTRACT:
A fluid pressure control circuit includes a fluid pressure device which is operated by a fluid pressure; a control valve which is connected to the fluid pressure device via a connecting passage, and which changes a flow rate of predetermined fluid that is to be supplied to the fluid pressure device or that is to be discharged from the fluid pressure device according to a position of a valve element; and a pressure difference reflecting device which moves the valve element based on a difference in the fluid pressure between predetermined two different portions in the connecting passage and which changes the flow rate of the fluid that is to be supplied or to be discharged through the control valve according to the fluid pressure difference. With this fluid pressure control circuit, it is possible to obtain excellent responsiveness during supply/discharge of the fluid, change in the fluid pressure or the like, without increasing the amount of the fluid to be consumed.

REFERENCES:
patent: 4685295 (1987-08-01), Christiansen et al.
patent: 5056311 (1991-10-01), Tischer
patent: 5-196125 (1993-08-01), None
patent: 5-196127 (1993-08-01), None
patent: 8-178049 (1996-07-01), None

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