Directional control with load-sensing passage controlled by thro

Details Directional control with load-sensing passage controlled by thro Directional control with load-sensing passage controlled by thro

1989-03-06

1990-07-17

Look, Edward K.

Power plants

Pressure fluid source and motor

Condition responsive control of motive fluid flow

91518, 13759613, F15B 1302

Patent

active

049413210

ABSTRACT:
A directional control valve between the pump and consumer has a load-pressure-sensing connection with a variable throttle. The sensed load pressure acts to bias a supply-flow-bypassing pressure compensation valve connected to the main pump line. Control of the load pressure throttling allows the increase in main pump line pressure to be adapted continuously and automatically to the demand. The variable throttle includes a spring-biased nonreturn valve in which the spring bias varies in proportion to the lift movement and in an infinitely variable manner at least over a portion of the lift path of the valve spool.

REFERENCES:
patent: 3971216 (1976-07-01), Miller
patent: 4325410 (1982-04-01), Bernhardt et al.
patent: 4436020 (1984-03-01), Budzich
patent: 4610271 (1986-09-01), Balmer et al.
patent: 4879945 (1989-11-01), Brunner et al.

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