Variable rate aneroid capsule

Details Variable rate aneroid capsule Variable rate aneroid capsule

1978-12-07

1980-11-04

Cohen, Irwin C.

Expansible chamber devices

Bellows type expansible chamber

92 42, F01B 1900, F16J 304

Patent

active

042312850

ABSTRACT:
The figure shows a variable rate aneroid capsule consisting of a bellows 24 sealed with vacuum inside and having helically formed convolutions 22 defining an outer helical threaded surface 20 that is matingly engageable with the helical threaded surface 18 of a nut 14 that is axially slidably but non-rotatably mounted in a stationary housing 10; the bellows having end shafts 30 and 32 extending rotatably through the housing for connection of shaft 30 to a device to be moved linearly, and for connection of shaft 32 through an adjustably mounted sleeve 38 to a lever 42 for rotating the bellows to progressively engage the convolutions with the nut 14 to render the engaged convolutions inactive by preventing expansion or contraction of the engaged convolutions and thereby reducing the number of active unengaged convolutions to thereby vary the stroke and spring rate of the bellows for the same pressure differential across the surface of the bellows.

REFERENCES:
patent: 1408208 (1922-02-01), Jones
patent: 2695629 (1954-11-01), Ribley
patent: 3155109 (1964-11-01), Anthon
patent: 3367244 (1968-02-01), Charter
patent: 3529908 (1970-09-01), Smith
patent: 4066091 (1978-01-01), Itoh et al.

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