Power assist device for control system

Details Power assist device for control system Power assist device for control system

1980-07-29

1983-08-23

Schwadron, Martin P.

Motors: expansible chamber type

With signal, indicator or inspection means

91216R, 91216A, F01B 3112

Patent

active

043997341

ABSTRACT:
A power assist device for a control system to amplify force to assist in movement of control apparatus. Device has signal input device and directional valve which are both responsive to a control signal, and a fluid power cylinder assembly which is connectable to an input of the control apparatus to apply an amplified control signal thereto. The directional valve means controls fluid flow between first and second chambers on opposite sides of a piston of the power cylinder assembly so as to determine the direction of movement of the assembly in response to valve position. The signal input device has an indicator to indicate a particular control setting or datum for a control signal which can be felt by operator, which contrasts with prior art power assist device where feel of a particular setting location is lost.

REFERENCES:
patent: 2016727 (1935-10-01), Roth
patent: 2073921 (1937-03-01), Caracristi
patent: 2617257 (1952-11-01), Douglas
patent: 2649841 (1953-08-01), Jacques
patent: 2718877 (1955-09-01), Rishel et al.
patent: 3202011 (1965-08-01), Kobelt
patent: 3216454 (1965-11-01), Richter et al.
patent: 3290996 (1966-12-01), Floyd
patent: 3487750 (1970-01-01), Borgeson

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