Fluid handling – Systems – With flow control means for branched passages
Patent
1981-06-12
1984-01-17
Chambers, A. Michael
Fluid handling
Systems
With flow control means for branched passages
137 79, 137878, F16K 1104
Patent
active
044259417
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 and a spring operatively associated with the piston unit, the piston unit comprising a plurality of pistons disposed in spaced substantially parallel relation and being secured together to be axially moved in unison in the chamber under the influence of the condition responsive device. The spring comprises a single coiled compression spring telescopically receiving the pistons therein, the pistons being of different lengths.
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patent: 3960124 (1976-06-01), Payne
patent: 3972472 (1976-08-01), Kawabata
patent: 4133349 (1979-01-01), Striplirs
patent: 4147180 (1979-04-01), Steele, Jr.
patent: 4228817 (1980-10-01), Weaver
Chambers A. Michael
Robertshaw Controls Company
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