Purgeable dispensing gun for polyurethane foam and the like

Details Purgeable dispensing gun for polyurethane foam and the like Purgeable dispensing gun for polyurethane foam and the like

B - Operations, Transporting

05

B

222/30.3

B05B 7/26 (2006.01) B01F 7/00 (2006.01) B05B 1/00 (2006.01)

Patent

CA 1044664

PURGEABLE DISPENSING GUN FOR POLYURETHANE FOAM AND THE LIKE Abstract of the Disclosure A gun is disclosed for mixing and dispensing a settable fluid product having separately stored constituents. The gun has primary valves for controlling the flow of product fluid constituents along separate primary paths and into a common mixing and dispensing nozzle. A secondary valve permits the flow of a purge fluid along secondary passages, past the primary valves, along at least parts of the primary passages and through the nozzle. According to an important aspect of the invention, a disposable nozzle is arranged with separate, independently operable valves contained therein for isolating the interaction of the product constituents to the nozzle.

249532

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