Control mechanism

Details Control mechanism Control mechanism

1979-12-11

1981-10-27

Michalsky, Gerald A.

Motors: expansible chamber type

Differential

Motive fluid constantly applied to one working member face

91459, 13762545, 13762565, 251129, 335276, F15B 13044

Patent

active

042966760

ABSTRACT:
A mechanism for controlling the position of a movable member and for locking it in any desired position comprising a hydraulic displacement device movable with the member and a slide valve hydraulically connected to the displacement device to control flow of liquid to or from the device. The slide valve includes a pre-loaded spring, capable in the absence of other force of moving the slide valve to its closed position to lock the member against movement. A force motor is operable when desired to move the slide valve to its open position to permit movement of the member.

REFERENCES:
patent: 2926696 (1960-03-01), Kolm
patent: 3149641 (1964-09-01), Norton
patent: 3165676 (1965-01-01), O'Brien
patent: 3272234 (1966-09-01), Parker
patent: 3938778 (1976-02-01), Hansen et al.

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