Dispenser for foamed detergents

Details Dispenser for foamed detergents Dispenser for foamed detergents

2006-06-20

2006-06-20

Mar, Michael (Department: 3754)

Dispensing

With discharge assistant

With material supply container and discharge assistant with...

C222S190000, C222S181100, C222S181300, C222S149000, C239S106000, C239S112000

Reexamination Certificate

active

07063239

ABSTRACT:
A dispenser for foamed detergents includes a cylinder (C) in which a piston (P) airtightly slides, the cylinder (C) being connected through a valve (V) to a foamer (F) where the detergent is mixed with air to form the foam which is dispensed through a dispensing chamber (U) provided with a nozzle (N), and further includes an additional piston (S) connected to the piston (P) through a shaft (A) and airtightly sliding in an additional cylinder (C″) in communication with the outside through a one-way valve (Y), a duct (D) extending between said additional cylinder (C″) and the dispensing chamber (U). In this way there is obtained the delivery of air through the duct (D) during the return travel to achieve the cleaning of the dispensing chamber (U) and of the dispensing nozzle (N) so as to prevent dripping of the foam and the development of mildew in case of a long interval before the next use.

REFERENCES:
patent: 4477000 (1984-10-01), Arabian
patent: 5226565 (1993-07-01), Hladis et al.
patent: 5779104 (1998-07-01), Reidel
patent: 5862954 (1999-01-01), Ehrensperger et al.
patent: 5906299 (1999-05-01), Hagleitner
patent: 6082586 (2000-07-01), Banks
patent: 2003/0000967 (2003-01-01), Ehrensperger et al.
patent: 676227 (1978-12-01), None

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