Adjustable range spring for differential pressure responsive dev

Details Adjustable range spring for differential pressure responsive dev Adjustable range spring for differential pressure responsive dev

1987-02-09

1988-10-18

Kashnikow, Andres

Spring devices

Compound

267 86, 267272, 73716, 73720, F16F 307, F16F 100, G01L 904, G01L 1302

Patent

active

047781599

ABSTRACT:
A range spring assembly for a differential pressure responsive device which includes a spring retainer plate configured for coaction with a movable portion of a device, such as a bellows or diaphragm. A flat spiral spring in spaced relation to the retainer plate is provided with a clamp disc. A plurality of helical range springs are equiangularly disposed about a circumference inwardly of the periphery of the retainer plate, each of the range springs having a first end thereof securely attached to the retainer plate adjacent the center thereof, with the other ends being selectively attachable to the clamp disc, whereby the range may be readily established by locking one or more ends of the helical springs for providing the desired spring bias for the selected range.

REFERENCES:
patent: 2945510 (1960-07-01), Jones
patent: 3422680 (1969-01-01), Nolte
patent: 3926055 (1975-12-01), Garnett

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