Apparatus and method for dispensing corrosive liquids

Details Apparatus and method for dispensing corrosive liquids Apparatus and method for dispensing corrosive liquids

D - Textiles, Paper

06

F

222/63.1

D06F 39/02 (2006.01) A47L 15/44 (2006.01) F04B 9/107 (2006.01)

Patent

CA 1109837

Abstract of the Disclosure A method for increasing the operable life of corrosive liquid dispensers, and dispenser apparatus using same are disclosed. A dispenser body (l2) defines an inner cavity (20) in which a dispensing element moves. In a preferred embodiment, the moving element comprises a dual-acting piston (40) which divides the inner chamber into a motive force chamber (20a) and a retaining chamber (20b). Water pressure provides the motive force for moving the piston to dispense corrosive liquid from the retaining chamber, while simultaneously cleaning the chamber walls and piston seals (36, 37) during each diS- pensing cycle. Dispensers incorporating the invention and using features such as an adjustable piston stroke and use of mechanical advantage in dispensing the cor- rosive liquid, are also disclosed.

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