Zone control valve

Details Zone control valve Zone control valve

1983-01-17

1986-06-10

Scott, Samuel

Valves and valve actuation

Mechanical movement actuator

Lever

251 11, 251291, 267 58, 236 68R, F16K 3100

Patent

active

045938822

ABSTRACT:
A zone valve of the type using a heat motor includes a biasing spring that operates on a lever, the lever operating on a valve. The spring includes arms that slidingly engage the lever. The arms each include a bent portion adjacent the point of contact with the lever. By providing the bent portion on each arm, the effective biasing force produced on the lever is decreased when the lever is in a raised position.

REFERENCES:
patent: 1925945 (1933-09-01), Zielinski et al.
patent: 2242593 (1941-05-01), Olson
patent: 2750185 (1956-06-01), Moore
patent: 3522822 (1970-08-01), McIntosh
patent: 3790122 (1974-02-01), Weinstein
patent: 3851810 (1974-12-01), Jespersen
patent: 4294133 (1981-10-01), Hurley

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