Pressure switch with diaphragm and valve means

Details Pressure switch with diaphragm and valve means Pressure switch with diaphragm and valve means

1976-04-26

1978-03-28

Tolin, Gerald P.

Electricity: circuit makers and breakers

Fluid pressure

Diaphragm

200 83T, 200 83A, 417 38, H01H 3534

Patent

active

040816214

ABSTRACT:
A pressure switch comprising a housing and a movable pressure responsive diaphragm in the housing cooperating therewith to define a sensing chamber. The housing has an inlet passage leading to the sensing chamber and a vent passage leading from the sensing chamber. A check valve allows fluid to flow through the inlet passage into the sensing chamber and prevents flow through the inlet passage in the reverse direction. A pressure relief valve at least partially vents the sensing chamber through the outlet passage in response to the differential pressure across the pressure relief valve reaching about a predetermined magnitude. At least a portion of the diaphragm is movable along a path in response to pressure changes in the sensing chamber and an actuator is carried by the movable portion of the diaphragm. A switch is mounted on the housing in a position to be actuated by the movement of the actuator.

REFERENCES:
patent: 2773251 (1956-12-01), Snyder
patent: 3711222 (1973-01-01), Hartley
patent: 3739810 (1973-06-01), Horan, Jr.
patent: 3922111 (1975-11-01), Deters

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