Pneumatic time delay valve

Details Pneumatic time delay valve Pneumatic time delay valve

1975-10-08

1976-11-09

Blunk, Evon C.

Fire extinguishers

Automatic valves

137509, 137599, 13762411, A62C 3706, F16K 31163

Patent

active

039905160

ABSTRACT:
A valve body contains a coaxially slidably valve element with a seal member at the upstream end and a pair of differential area pistons at the other end. Fluid passage means direct fluid from the upstream end to a zone between the pistons to cause the pistons to seat the seal member. An orifice in the downstream, larger area piston bleeds fluid to an accumulator of preselected volume. Once the pressure forces on the large piston balance, the pressure force on the small piston unseat the seal member.

REFERENCES:
patent: 2410375 (1946-10-01), Wright
patent: 2537009 (1951-01-01), Allen et al.
patent: 2663153 (1953-12-01), Grant, Jr.
patent: 2758657 (1956-08-01), Williamson et al.
patent: 2865592 (1958-12-01), Schrank

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