Dual mode pneumatic control system

Details Dual mode pneumatic control system Dual mode pneumatic control system

1989-11-02

1990-09-04

Cohan, Alan

Fluid handling

Processes

Involving pressure control

137 84, 251 26, G05D 1600

Patent

active

049535781

ABSTRACT:
This invention relates to a pneumatic control device having an operating mode selecting means for operating in either the manual or automatic modes. Pneumatic pressure is regulated in the manual mode by a hand operated leakport, and in the automatic mode by a voice coil or other pressure regulating device. The pneumatic input supply, manual pressure regulating means and voice coil all communicate at a common surface. The mode selecting means slides across this common surface to connect together the pneumatic input supply with one of the selected pressure regulating means.

REFERENCES:
patent: 3056417 (1962-10-01), Greaves
patent: 3282552 (1966-11-01), Sommese
patent: 4199006 (1980-04-01), Thalhamer
patent: 4290441 (1981-09-01), Scott
patent: 4561470 (1985-12-01), Bezard

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