Servo device for controlling the flow rate of a hydraulic system

Details Servo device for controlling the flow rate of a hydraulic system Servo device for controlling the flow rate of a hydraulic system

1988-10-14

1989-07-25

Rosenthal, Arnold

Fluid handling

Line condition change responsive valves

With separate connected fluid reactor surface

137504, 137599, B62D 508, G05D 700

Patent

active

048503908

ABSTRACT:
The flow-rate control device (10), which is arranged in a branch line (6), comprises a slide (19) forming, together with an outlet channel, a variable constriction (.sigma..sub.1), the slide being biased by a spring, one end of which bears against the end of an actuating rod (30) biased by a piston (21) actuated by a speed-reducing servo-drive unit (22) controlled by an electrical signal (11) dependent on a significant parameter, for example the speed of a vehicle for power-assisted steering of the vehicle. The rod (30) further controls an internal bypass passage (33, 34) parallel to the variable constriction (.sigma..sub.1).

REFERENCES:
patent: 2755058 (1956-07-01), Margrave
patent: 3424196 (1969-01-01), Donner
patent: 3724494 (1973-04-01), Alber
patent: 4526342 (1985-07-01), Wakefield

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