Fluid handling – Line condition change responsive valves – Direct response valves
Patent
1993-08-18
1994-06-28
Nilson, Robert G.
Fluid handling
Line condition change responsive valves
Direct response valves
137903, 137906, F16K 1502
Patent
active
053238079
ABSTRACT:
A check valve having a reduced or zero pressure drop and more particularly such a valve in combination with a spray nozzle. The check valve includes a sealed gas chamber which has within it a closed-cell foam element which insures that some gas remains in the chamber even if the primary seal fails. The new valve
ozzle combination allows valve operating pressure to be set very close to nozzle operation pressure which allows the nozzle to achieve full spray more quickly at start-up and a more immediate cessation of flow at shut off.
REFERENCES:
patent: 661603 (1900-11-01), Gold
patent: 2143399 (1939-01-01), Abercrombie
patent: 2289946 (1942-07-01), Weatherhead
patent: 4172465 (1979-10-01), Dashner
Fralick William D.
Gauld James B.
Patrick Robert M.
Delavan Inc.
Nilson Robert G.
Reiter Howard S.
Watson Richard W.
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