Back pressure valve

Details Back pressure valve Back pressure valve

1988-05-12

1989-09-26

Rivell, John

Fluid handling

Line condition change responsive valves

With separate connected fluid reactor surface

138 31, 92117A, F16L 5507

Patent

active

048692883

ABSTRACT:
A back pressure valve accumulates therein a predetermined amount of fluid having pressure higher than a predetermined level.
The back pressure valve comprises a casing having a chamber formed therein, which chamber is communicating with an inlet port and an outlet port, a piston which is slidably installed in the casing, an elastic member which urges the piston toward the inlet port, and a relief valve which opens when pressure in the chamber exceeds a predetermined pressure level so as to permit flow of fluid from the inlet port to the outlet port.
The back pressure valve further comprises a cylindrical piston which is slidably inserted between an outer periphery of the piston and an inner periphery of the casing, and an outer elastic member which urges the cylindrical piston toward the inlet port.
The back pressure valve minimizes occurrence of trouble due to clogging of contaminations though it is simple in construction and inexpensive.

REFERENCES:
patent: 2754847 (1956-07-01), Ashton et al.
patent: 3863676 (1975-02-01), Tarsha
patent: 4000758 (1977-01-01), Meisenheimer, Jr.
patent: 4138846 (1979-02-01), Sakakibara
patent: 4217758 (1980-08-01), Bach et al.

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