Zone control valve

Valves and valve actuation – Heat or buoyancy motor actuated

Patent

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Details

251128, 236 68R, F16K 3100

Patent

active

045601402

ABSTRACT:
A zone valve is described in which the frame for the operator unit is assembled without separate fasteners. Tongue and groove on the frame pieces fit together in an interlocking manner to provide a rigid frame construction. The assembly of the frame, hinges the parts against each other so that they snap together and are rigidly retained together by the inherent spring force of the members.

REFERENCES:
patent: 2582419 (1952-01-01), Dillman
patent: 3245651 (1966-04-01), Erickson
patent: 3273850 (1966-09-01), Kolze
patent: 3290003 (1966-12-01), Kessler
patent: 3326510 (1967-06-01), Kolze
patent: 3395885 (1968-08-01), Kolze et al.
patent: 3567973 (1971-03-01), Mastrodonato, Sr.
patent: 3709431 (1973-01-01), Channell et al.
patent: 3790122 (1974-02-01), Weinstein
patent: 3912219 (1975-10-01), Weinstein
patent: 4043532 (1977-08-01), Draxler

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