Vented dispenser for media with filter
AssigneeIng. Erich Pfeiffer GmbH
InventorsRene Bommer, Michael Stifel
Life of this patent
Estimating the term…
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.
Claims26
A dispenser for dispensing media during a discharge operation comprising:
- dispenser unit (2) including a thrust operated valve (14, 15) traversed by the media during the discharge operation, and
- a venting filter (21) for venting a reservoir chamber (35) supplying said dispenser unit (2) with the media, wherein means are provided for assemblingly connecting said dispenser unit (2) with the reservoir chamber (35) and for subsequently tensioning said venting filter (21).
A dispenser for dispensing media during a discharge operation comprising:
- a dispenser unit (2) as a preassembled unit mountable in a vicinity of a container opening on a reservoir unit (3) including a reservoir chamber (35) for the media, said dispenser unit (2) including a dispenser base (4) defining an outermost base outside face;
- media ducts (11 to 13) located within said outermost base outside face and including a media inlet (12), a media outlet separate from said media inlet and a media chamber (11), said dispenser unit (2) including a closure for closing the reservoir chamber (35) during discharging the media out of said media outlet by being tensioned against the reservoir unit (3) with an assembly tension;
- venting means for venting the reservoir chamber (35) with environmental air while said media inlet (12) communicates with the reservoir chamber (35), said venting means including a filter unit (20) including a filter (21) for filtering the environmental air;
- and
- holding means for positionally securing said filter (21) with respect to said dispenser (1), wherein said filter unit (20) includes a counter face (24, 25;
- 25a) separate from said dispenser unit (2) for supportingly contacting a holding face (26, 27) of said dispenser (1), and wherein said holding means include means for directly supporting said counter face (24) on the reservoir unit (3) independent from said dispenser unit (2) and for tensioning both said counter face (24) and said filter (21).
Dependencies are inferred from the claim text.