Valve construction having multiple piston means

Details Valve construction having multiple piston means Valve construction having multiple piston means

1978-06-01

1980-10-21

Cline, William R.

Fluid handling

Ambient condition change responsive

Atmospheric

137269, 137595, 137636, F16K 2704, F16K 1106

Patent

active

042288177

ABSTRACT:
A valve construction having a housing provided with a chamber and ports leading to the chamber and having an axially movable piston unit disposed in the chamber to interconnect certain of the ports together in relation to the axial position of the piston unit that is caused by a condition responsive device operatively associated with the piston unit, the piston unit comprising a plurality of pistons disposed in spaced parallel relation and being secured together to be axially moved in unison in the chamber under the influence of the condition responsive device.

REFERENCES:
patent: 3364942 (1968-01-01), Ney et al.
patent: 3960124 (1976-06-01), Payne
patent: 3972472 (1976-08-01), Kawabata
patent: 3989058 (1976-11-01), Jackson et al.

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