Vented dispenser for media with filter

Details Vented dispenser for media with filter Vented dispenser for media with filter

1997-03-13

1999-07-27

Shaver, Kevin P.

Dispensing

With filter

Associated with vent passage

22218911, 2223212, 2223219, B67D 558

Patent

active

059275596

ABSTRACT:
A pump (2) is secured to a reservoir vessel (3) with a seal interposed. The seal contains a filter unit (20) to enable filtered outside air to be replenished in the reservoir chamber (35) in the course of it being emptied. As a result of this the air does not need to flow through the interior of the pump (2). In addition, the filter (21) does not need to be selected according to requirements until pump and reservoir are assembled. Furthermore, assembly is simplified and no separate mount for the filter (21) is needed.

REFERENCES:
patent: 3149758 (1964-09-01), Bush et al.
patent: 4694976 (1987-09-01), Schuetz
patent: 4853013 (1989-08-01), Rio et al.
patent: 5074440 (1991-12-01), Clements et al.
patent: 5238153 (1993-08-01), Castillo et al.
patent: 5727715 (1998-03-01), McKenna et al.
European search report dated Jun. 18, 1997 in European Appl. No. 97103823.7.
German search report dated Nov. 13, 1996 in German Appl. No. 196 10 457.2.

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