Changeover valve

Details Changeover valve Changeover valve

1987-12-24

1988-09-27

Nilson, Robert G.

Fluid handling

Self-proportioning or correlating systems

Supply and exhaust type

1376252, 13762566, 251 75, F16K 1102

Patent

active

047734396

ABSTRACT:
There is described a valve having three ports (3,4,5) one of which (3 or 4) is selectively closed by a bistable toggle-action valve member (6). An actuating member (17) driven by a pressure sensor (23) operates the valve member via cooperating abutments (18,19,20), the actuating member also having a bistable toggle-action and engaging the valve member as it approaches the end of its travel in either direction, to carry the valve member (6) over its balance point and thus effect the changeover of the valve.

REFERENCES:
patent: 3353559 (1967-11-01), Phillips
patent: 3448756 (1969-06-01), Nordegren

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