Device for dispensing a fluid product

Details Device for dispensing a fluid product Device for dispensing a fluid product

2007-03-20

2011-11-29

Ngo, Lien (Department: 3754)

Dispensing

Resilient wall

Fluid pressure generating pump or pulsator and/or removable...

C222S260000

Reexamination Certificate

active

08066153

ABSTRACT:
A fluid dispenser device comprising: a reservoir (R) of variable working volume comprising a sealing slide-cylinder (100) and a follower piston (2) that is in sliding sealing contact in said cylinder; dispenser means (3) that are suitable for putting the fluid stored in the reservoir under pressure in such a manner as to drive a fraction of the fluid through a dispenser orifice (37), and under suction in such a manner as to move the follower piston in the direction that decreases the working volume of the reservoir; and non-return means that are suitable for preventing any substantial movement of the follower piston in the direction that increases the working volume of the reservoir; in which device the non-return means include at least one chamber (C) of variable volume that is filled with fluid from the reservoir during the suction stage.

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patent: 4598843 (1986-07-01), Foster et al.
patent: 4775080 (1988-10-01), Mettenbrink
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patent: 5042694 (1991-08-01), Birmelin
patent: 5052592 (1991-10-01), Wilken et al.
patent: 5377880 (1995-01-01), Moretti
patent: 6991135 (2006-01-01), von Schuckmann
patent: 7195136 (2007-03-01), von Schuckmann
patent: 7694856 (2010-04-01), Rossignol
patent: 34 35 576 (1986-04-01), None

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