Fluid pressure responsive apparatus

Details Fluid pressure responsive apparatus Fluid pressure responsive apparatus

1980-04-15

1982-01-05

Hershkovitz, Abraham

Expansible chamber devices

Bellows type expansible chamber

Plural bellows

92 40, 92 44, 92130B, 92131, F16J 304

Patent

active

043087884

ABSTRACT:
A differential pressure unit having overrange valves loosely mounted on a valve stem connected between the ends of a respective pair of movable bellows ends. A pair of spiral range springs bias both valves toward open positions. The valves include annular elastomers bonded to the edges of the apertured discs. The apertures in the discs act to allow the elastomers to seat and to unseat without causing lock-up. The discs are retained between plates and snap rings.

REFERENCES:
patent: 2536435 (1951-01-01), Fox
patent: 2664749 (1954-01-01), Jones
patent: 2735369 (1956-02-01), Turvey
patent: 2857495 (1958-10-01), Bourns
patent: 3022800 (1962-02-01), Boonshaft
patent: 3053281 (1962-09-01), Taylor
patent: 3820755 (1974-06-01), Greenwood

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