Overrange valve or the like

Details Overrange valve or the like Overrange valve or the like

1979-08-03

1981-01-27

Schwadron, Martin P.

Valves and valve actuation

Valve head movably connected for accommodation to seat

With universal connection

92 38, 251DIG1, F16K 2500, F01B 1900

Patent

active

042470781

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: 2664749 (1954-01-01), Jones
patent: 2920653 (1960-01-01), Wolff
patent: 3009678 (1961-11-01), Soderberg et al.
patent: 3557837 (1971-01-01), Giwosky
patent: 3820755 (1974-06-01), Greenwood et al.
patent: 3873063 (1975-03-01), Illing

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