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AssigneeRexam Dispensing Systems S.A.S.
InventorsJean-Louis Bougamont, Bernard Clerget, Pierre Dumont
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The invention relates to an air-intake device for drawing air into a liquid dispenser equipped with a rigid reservoir (R) and with an atmospheric pump (P) provided, in particular, with a cylindrical and conical body (C) and with a support flange (S) fixed to the neck of the reservoir (R) while bearing against a sealing gasket surrounding the pump body, said device being characterized in that it comprises a flat annular gasket-forming washer (1) whose free edge (10) is in leaktight abutment towards the outside under a frustoconical shoulder (20) carried by a collar (2) engaged over said pump body, and is capable of being deformed elastically under the effect of internal suction to enable air to be drawn in.
1/ An air-intake device for drawing air into a liquid dispenser equipped with a rigid reservoir (R) and with an atmospheric pump (P) provided, in particular, with a cylindrical and conical body (C) and with a support flange (S) fixed to the neck of the reservoir (R) while bearing against a sealing gasket surrounding the pump body, said device being characterized in that it comprises a flat annular gasket-forming washer (1) whose free edge (10) is in leaktight abutment towards the outside under a frustoconical shoulder (20) carried by a collar (2) engaged over said pump body, and is capable of being deformed elastically under the effect of internal suction to enable air to be drawn in.
2/ A device according to claim 1, characterized in that said washer (1) is provided with at least one radial slot (13) extending from the free edge to facilitate deforming said free edge.
3/ A device according to any preceding claim, characterized in that, when the pump (P) is in the closed position, the inside edge (10) of said washer (1) is deflected inwards under stress while having a portion of its outside face (11) in contact with said shoulder (20).
4/ A device according to any preceding claim, characterized in that the inside face of said washer (1) is provided with a peripheral keying groove serving to receive a rib (N) provided on the top periphery of the reservoir (R).