System for automatic self-proportioning of foam concentrate...

Details System for automatic self-proportioning of foam concentrate... System for automatic self-proportioning of foam concentrate...

2006-11-28

2006-11-28

Kim, Christopher (Department: 3752)

Fluid sprinkling, spraying, and diffusing

Processes

C239S413000, C239S416400, C239S424000, C239S513000, C169S044000

Reexamination Certificate

active

07140552

ABSTRACT:
A fire fighting nozzle for extinguishing industrial scale fires including improved automatic pressure regulating features, enhanced educting features including central and peripheral channeling for foam concentrate, and combining with a capacity to throw dry chemical. Improved pressure regulating features include a double acting baffle and preferably a relief valve. Method and apparatus for automatically metering an additive such as foam concentrate into a conduit having a variably flowing fire fighting fluid therethrough, the conduit including a discharge device, proximate or downstream.

REFERENCES:
patent: 2471142 (1949-05-01), Chaffee
patent: 2480925 (1949-09-01), Hirst
patent: 2751920 (1956-06-01), Kanelos
patent: 3647002 (1972-03-01), Lindsay
patent: 3934604 (1976-01-01), Sanderson
patent: 4224956 (1980-09-01), Klein

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