Double valve apparatus

Details Double valve apparatus Double valve apparatus

1988-07-22

1989-04-11

Fisher, Richard V.

Liquid purification or separation

Flow, fluid pressure or material level, responsive

Fluid current controlled cyclic system

210101, 210169, 2101981, 210199, 137895, 1376142, 13710111, 261 643, 261 644, 261DIG75, C02F 168

Patent

active

048204080

ABSTRACT:
Double valve apparatus is used in a swimming pool chlorinating system for injecting chlorine gas into a swimming pool when a swimming pool pump is operating. Two valve elements move on and off two valve seats for preventing air from bleeding back to the water pump when the pump is not operating and for preventing back pressure in the system from introducing water into the chlorine gas line.

REFERENCES:
patent: 2147568 (1939-02-01), Barber
patent: 2166370 (1939-07-01), Putnam et al.
patent: 2707480 (1955-05-01), Klosse
patent: 3220430 (1965-11-01), Haskett
patent: 3504685 (1970-04-01), Kleinmann
patent: 3552568 (1971-01-01), Wade
patent: 3807434 (1974-04-01), Rasmussen et al.
patent: 3976220 (1976-08-01), de Kanter

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