Three-function pressure switch

Details Three-function pressure switch Three-function pressure switch

1985-02-07

1986-05-27

Tolin, G. P.

Electricity: circuit makers and breakers

Fluid pressure

Diaphragm

200 83P, 200 814, H01H 3534

Patent

active

045916772

ABSTRACT:
There is provided a three-function pressure switch adapted to be provided on the higher pressure side of the cooling cycle circuit in an automobile cooling device.
The three-function pressure switch comprises a casing including a pressure inlet and a pressure receiving chamber, a diaphragm disposed within the pressure receiving chamber across the chamber, a first resilient disc disposed below the diaphragm for resilient warping subject to pressure from the chamber through the diaphragm, a first piston positioned below the disc for vertical movement as the disc warps, a holder for engaging the first piston, a second resilient disc disposed below the holder for warping as the holder moves, a first electrical switching section adapted to opened and closed by the first resilient disc and a second electrical switching section adapted to be opened and closed by the second resilient disc.

REFERENCES:
patent: 3657501 (1972-04-01), Hoyt
patent: 4296287 (1981-10-01), Boulanger
patent: 4400601 (1983-08-01), Brucken
patent: 4473729 (1984-09-01), Ting

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