Fluid handling – Systems – Valves with separate – correlated – actuators
Patent
1974-08-16
1976-06-15
Schwadron, Martin P.
Fluid handling
Systems
Valves with separate, correlated, actuators
251 89, 251131, 318663, 318674, F16K 3142
Patent
active
039630510
ABSTRACT:
A remote control system for the jack cylinders of a hydraulically operated crane includes a plurality of regulating valves for controlling respective jack cylinders, the regulation of each valve being controlled by the movement of a respective valve spool connected to a respective lever forming part of a linkage including an arm mounted on a rotatable shaft and connectable to the shaft by a respective electromagnetically operated clutch so that by engagement of one said clutch and rotation of the shaft to a predetermined position the corresponding valve spool may be correspondingly positioned to move the associated jack cylinder accordingly.
Engagement of the clutches and rotation of the shaft can be controlled by a portable actuating unit connected to the rest of the system by an electrical cable, the system including a control means which adjusts the position of the shaft to correspond with the setting of a control member on the actuating unit.
REFERENCES:
patent: 2112218 (1938-03-01), Gille
patent: 2486591 (1949-11-01), Ferrante
patent: 2684459 (1954-07-01), Brown et al.
patent: 3559817 (1971-02-01), Brown
Gerard Richard
Kuhlmann & Rust KG, Maschinenfabrik
Schwadron Martin P.
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