Valves and valve actuation – With correlated flow path – With mounting or support
Patent
1981-07-21
1983-12-27
Michalsky, Gerald A.
Valves and valve actuation
With correlated flow path
With mounting or support
137637, 251131, 318563, F16K 3105
Patent
active
044226195
ABSTRACT:
A remote control system for controlling the movement of manually operable mechanisms such as hydraulic control valves for hydraulically operating the various cylinders on equipment such as cranes, or the like. A remote control unit includes a deadman switch and one or more potentiometers that provide control signals to a corresponding number of servo circuits. Each servo circuit drives a motor and a motor position sensing potentiometer that generates an error signal back to the servo. The motor rotation provides linear movement to the hydraulic control valve through a solenoid operated mechanical coupling. The servo circuit includes safety circuitry that detects open or shorted circuits in the cable to the remote unit and releases the solenoid coupling and returns the motor to a neutral position. When closed, the deadman switch diverts high pressure hydraulic fluid into the hydraulic systems so that, if desired, all hydraulic control valves may be preset to the desired position and, upon closing of the deadman switch, all preset hydraulic cylinders will become operative.
REFERENCES:
patent: 3963051 (1976-06-01), Kuhlmann
Castle Linval B.
Michalsky Gerald A.
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