Pressure equalizing mechanism for a pressure switch

Details Pressure equalizing mechanism for a pressure switch Pressure equalizing mechanism for a pressure switch

1992-11-10

1994-05-03

Tolin, Gerald P.

Electricity: circuit makers and breakers

Fluid pressure

Diaphragm

73723, 200 82R, 200 83W, 2003021, H01H 3534

Patent

active

053089391

ABSTRACT:
An inner space of an outer case is partitioned by a gas permiable diaphragm into a fluid pressure operating chamber and a reference pressure operating chamber. The former chamber communicates with a pressurized fluid inlet hole formed in the case, and the latter communicates with a pressure equalizing hole formed in the case. Electrical contacts are stored in the latter chamber to perform on/off-operation in response to deflection of the diaphragm caused by pressure change of pressurized fluid in the former chamber. Outer connection terminals for the contacts are supported by the outer case. A filter is provided in the equalizing hole.

REFERENCES:
patent: 3154652 (1964-10-01), Gilman
patent: 4037317 (1977-07-01), Bauer
patent: 4524254 (1985-06-01), Yoshida
patent: 4939321 (1990-07-01), Tanaka et al.
patent: 5122628 (1992-06-01), McLelland

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