Differential pressure switch with an adjusting piston driven by

Details Differential pressure switch with an adjusting piston driven by Differential pressure switch with an adjusting piston driven by

1995-04-06

1997-02-11

Tolin, Gerald P.

Electricity: circuit makers and breakers

Fluid pressure

Piston

73745, 116267, 200 83J, 340607, H01H 3534

Patent

active

056023731

ABSTRACT:
A differential pressure switch particularly suitable for monitoring dirt accumulation on a filter element of an oil-separating air filter comprising a piston which is movable in response to a relative change in pressure between two pressure zones and is biased in one direction by a restoring spring, and a rolling membrane which separates the pressure zones.

REFERENCES:
patent: 3206572 (1965-09-01), Buehler
patent: 4168415 (1979-09-01), Edwards, Jr. et al.
patent: 4343974 (1982-08-01), Hire
patent: 4368366 (1983-01-01), Kitamura
patent: 4525611 (1985-06-01), Akamatsu
patent: 4792651 (1988-12-01), Whiting
patent: 4879439 (1989-11-01), Garcia
patent: 5089675 (1992-02-01), Betterton

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