Electrohydraulic set device

Details Electrohydraulic set device Electrohydraulic set device

1984-07-17

1985-10-01

Maslousky, Paul E.

Motors: expansible chamber type

Working member position feedback to motive fluid control

Bias-type input and feedback signal means

91459, F15B 1316

Patent

active

045438749

ABSTRACT:
An electro dynamic set device including an output set element, a piston having a piston rod and operable against the action of a force of hydraulic pressure and means defining a valve passage which communicates with an operating side of the piston to which hydraulic pressure is supplied. The passage is opened and closed by a control slide which operates by an electromagnet that can apply a magnetic force. A spring acts between the control slide and the piston such that the spring tends to move the control slide against the action of the magnetic force in a direction closing the passage. The control slide is annular and concentric around the piston rod and is located together with a coil of the electromagnet and an associated armature thereof in a common chamber. The coil encircles the piston rod as does the slide. The operating side of the piston is in the common chamber, the armature being suspended by another spring which permits movement of the armature in the length direction of the control slide. The control slide abuts the armature and is operated by movement of the armature.

REFERENCES:
patent: 2752891 (1956-07-01), Farkas
patent: 2966891 (1961-01-01), Williams
patent: 3131608 (1964-05-01), Yando
patent: 3208352 (1965-09-01), Lucien

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