Valve assembly

Details Valve assembly Valve assembly

1976-05-17

1978-04-25

Nilson, Robert G.

Fluid handling

Line condition change responsive valves

Safety cut-off requiring reset

137522, 137538, F16K 1700

Patent

active

040857727

ABSTRACT:
A valve assembly comprises a valve body having a bore therein, a first opening communicating with the bore, and a second opening displaced from the first opening and also communicating with the bore. A valve element is slidably mounted in the bore for longitudinal movement therein between first and second positions. In the first position the first opening is sealed from communication with the second opening, and in the second position communication between the first and second openings is permitted via the bore. The valve element includes a pressure reaction area exposed to fluid pressure from the second opening in the second position whereby the valve element is retained in the second position upon the presence of fluid pressure in the second opening in excess of a given limit. The assembly further comprises return means for automatically returning the valve element to the first position upon the absence of fluid pressure above the limit in the second opening.

REFERENCES:
patent: 2655935 (1953-10-01), Kinzbach
patent: 2748947 (1956-06-01), Jay
patent: 2851056 (1958-09-01), MacGlashan
patent: 3038557 (1962-06-01), Callahan

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