Control device and method of making the same

Details Control device and method of making the same Control device and method of making the same

1979-05-17

1981-09-22

Cohan, Alan

Fluid handling

Pressure modulating relays or followers

Plural series units

137 85, G05D 1600, F15B 500

Patent

active

042904412

ABSTRACT:
A control device having a housing provided with a main lever pivotally mounted thereto by a pivot structure and being operatively associated with a flapper to move the same relative to a leakport in relation to pivotal movement of the main lever. The device has a feedback diaphragm operatively associated with a feedback lever that is pivotally mounted to the housing and is operatively associated with the main lever to cause pivoting thereof upon pivoting movement of the feedback lever by the feedback diaphragm. The device has means for selectively changing the device to be either direct acting or reverse acting.

REFERENCES:
patent: 3095003 (1963-06-01), Dyson
patent: 3379205 (1968-04-01), Schmitz
patent: 3707980 (1973-01-01), Bergamini
patent: 3908685 (1975-09-01), Caldwell

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