Control system for a hydraulic load

Details Control system for a hydraulic load Control system for a hydraulic load

1980-04-04

1984-02-07

Walton, George L.

Motors: expansible chamber type

Fluid supply through diverse paths to single expansible chamber

Second path activated in response to pressure or flow in...

137100, 137110, 91 31, F15B 13042

Patent

active

044296193

ABSTRACT:
A hydraulic control circuit for a cylinder-and-piston unit includes a relatively small electrohydraulically operated servo-control valve, a main pressure conduit including a measuring throttle, an auxiliary control valve cooperating with an additional pressure conduit connected parallel to the main pressure conduit to branch the pressure fluid in response to a predetermined level of pressure difference occurring across the measuring throttle. In this manner the servo-control valve can control a system of pressure fluid which is substantially larger than the nominal flow rate of the servo-control valve.

REFERENCES:
patent: Re30403 (1980-09-01), Bitonti
patent: 3550505 (1970-12-01), Byers
patent: 3776098 (1973-12-01), Behrens et al.

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