Fire hose nozzle foam expansion apparatus

Fluid sprinkling – spraying – and diffusing – Plural interchangeable discharge modifiers – outlet... – Selectively arrangeable outlet means

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Details

2394245, 2394285, B05B 112

Patent

active

054173710

ABSTRACT:
A foam generation apparatus for attachment to a terminal portion of a liquid carrying fire hose, and including an outlet nozzle for delivering the liquid in a controllable manner, and which includes a nozzle body movably attached over a center nozzle stem to be manually positionable relative to the stem to allow the liquid to be discharged in a stream of liquid or a fanned spray of the liquid. An expansion chamber support is applied to the exterior of the nozzle body for retaining an elongated foam expansion chamber in a readily detachable manner. Air drawing channels are provided between the expansion chamber support and the expansion chamber to provide for air to be drawn into the expansion chamber from the back end thereof during foam generation. The air drawing channels are positioned in the back end of the expansion chamber adjacent the nozzle so that air is drawn in essentially the same direction as liquid being discharged from the nozzle, and thereby the air is drawn into the expansion chamber early and from the back of the chamber to give sufficient air volume and time for the air to mix with the liquid prior to exiting the elongated expansion chamber. The expansion chamber is readily detachable to allow use of the outlet nozzle in a lighter weight non-foam producing mode, and to allow use of a long expansion chamber relative to the adjustable spray nozzle.

REFERENCES:
patent: Re20488 (1937-08-01), Zinkil
patent: 322286 (1885-07-01), Hemje
patent: 1342912 (1920-06-01), Johnson
patent: 2660457 (1953-11-01), Mallon
patent: 2738962 (1956-03-01), Goodrie
patent: 2747931 (1956-05-01), Wilson
patent: 3961754 (1976-06-01), Kuhns et al.
patent: 4518002 (1985-05-01), Battiston
patent: 4641786 (1987-02-01), Moore
patent: 4730775 (1988-03-01), Maas
patent: 4944460 (1990-07-01), Steingass
patent: 5083883 (1992-01-01), Ueda et al.

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