Two component external mix spray gun

Details Two component external mix spray gun Two component external mix spray gun

1994-12-08

1997-06-17

Graham, Matthew C.

Fluid sprinkling, spraying, and diffusing

Combining of separately supplied fluids

And valving means controlling flow for combining

239433, B05B 704, B05B 708

Patent

active

056390270

ABSTRACT:
A two component external mix spray gun having a pneumatically operated valve for controlling the injection of a catalyst into pattern shaping air passages in the gun. The catalyst is contacted with the atomized fluid externally to the spray gun. A trigger sequentially operates air and fluid valves to provide atomization air and pattern shaping air prior to opening the fluid valve. The pneumatic catalyst valve is responsive to an increase in the air pressure downstream from the air valve to inject the catalyst into the pattern shaping air prior to the opening of the fluid valve. The catalyst impinges on the atomized fluid eternally to the spray gun along with the pattern shaping air. The invention may be incorporated in either a hand held spray gun with a manual trigger or an automatic spray gun with a controller.

REFERENCES:
patent: 2958471 (1960-11-01), Zippel
patent: 2970773 (1961-02-01), Keryluk et al.
patent: 3087682 (1963-04-01), Peeps
patent: 3229911 (1966-01-01), Carlson et al.
patent: 5209405 (1993-05-01), Robinson et al.
patent: 5400971 (1995-03-01), Maugans et al.

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