Bellows pump mechanism

Details Bellows pump mechanism Bellows pump mechanism

2005-11-23

2008-10-14

Shaver, Kevin P. (Department: 3754)

Dispensing

Resilient wall

Supply container delivering to receiving chamber

C092S036000, C417S472000

Reexamination Certificate

active

07434710

ABSTRACT:
A bellows-type pump includes a body portion with an inlet and an outlet. A bellows member is secured to the body portion and provides a dosage volume that communicates with both the inlet and outlet. Compressing the bellows member causes a sealing web thereof to contact the inlet and seal the same against the flow of product from within the dosage volume. The sealing web does not cover the outlet upon compression of the bellows member and, thus, product is dispensed through the outlet upon such compression. Expansion of the bellows member draws product in through the inlet.

REFERENCES:
patent: 3777941 (1973-12-01), Riddle
patent: 3820689 (1974-06-01), Cocita
patent: 3987938 (1976-10-01), Cooprider et al.
patent: 5099885 (1992-03-01), Nilsson
patent: 5176510 (1993-01-01), Nilsson
patent: 5452826 (1995-09-01), Stern
patent: 6216916 (2001-04-01), Maddox
patent: 6752295 (2004-06-01), Weber
patent: 7025233 (2006-04-01), Masuda
patent: 0549050 (1993-06-01), None

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