Dual diaphragm three position actuator

Details Dual diaphragm three position actuator Dual diaphragm three position actuator

1988-07-15

1989-05-23

Look, Edward K.

Expansible chamber devices

Plural flexible wall working members

Diaphragm type having working fluid contacting areas of...

92 50, F01B 1900

Patent

active

048319155

ABSTRACT:
A dual diaphragm, multiposition vacuum actuator. Dual diaphragms in a housing define two vacuum chambers. A spring urges one diaphragm and an actuator rod extended, and the other diaphragm retracted. Vacuum in one chamber retracts the extended diaphragm and actuator rod to an intermediate position, and advances the retracted diaphragm. Vacuum added in the other chamber retracts both diaphragms and the rod as a unit to a fully retracted position.

REFERENCES:
patent: 3048361 (1962-08-01), Francis
patent: 3433132 (1969-03-01), James
patent: 3683753 (1972-08-01), Johnson
patent: 3824903 (1974-07-01), Hahn
patent: 4098459 (1978-07-01), Benjamin
patent: 4147094 (1979-04-01), Iguchi
patent: 4612847 (1986-09-01), Bouvot et al.
patent: 4638723 (1987-01-01), Bouvot

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