Static device for air replenishing a liquid product dispenser
AssigneeRexam Dispensing Systems S.A.S.
InventorsJean-Louis Bougamont, Pierre Dumont
Life of this patent
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Abstract
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) underlying a support flange (S) fixed to the reservoir (R), said device being characterized in that it comprises a sleeve (1) designed to be fitted around said body (C) of the pump, under said flange (S), and having its bottom portion provided with a vent-forming collar (10) whose inside wall which serves to come into radial clamping engagement against said body has a surface state such that said collar (10) is both impermeable to the liquid and also permeable to air.
Claims10
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) underlying a support flange (S) fixed to the reservoir (R), said device being characterized in that it comprises a sleeve (1) designed to be fitted around said body (C) of the pump, under said flange (S), and having its bottom portion provided with a vent-forming collar (10) whose inside wall which serves to come into radial clamping engagement against said body has a surface state such that said collar (10) is both impermeable to the liquid and also permeable to air.
2/ A device according to claim 1, characterized in that the surface of the inside wall of said collar (10) has grains (g) resulting from electrical discharge machining.
3/ A device according to claim 1 or claim 2, characterized in that, above said collar (10), said sleeve (1) co-operates with the wall of said body (C) to define an empty space suitable for communicating with the outside by forming at least one suction duct for drawing air in.
4/ A device according to claim 3, characterized in that said empty space is defined by at least one groove (e) extending over the outside side wall of the body (C) of the pump (P).
5/ A device according to claim 4, characterized in that, in the free state, the inside diameter of said sleeve (1) is less than or equal to the outside diameter of the body (C) in the vent zone.
6/ A device according to claim 4 or claim 5, characterized in that the top edge of said sleeve (1) comes into abutment against said flange (S).
7/ A device according to claim 3, characterized in that said empty space is formed by the gap (i) situated between the inside wall of the sleeve (1) and the outside side wall of the body (C) of the pump (P), above the collar (10).
8/ A device according to claim 7, characterized in that the top portion of said sleeve (1) is provided with crenellations (11) making it possible for air to be drawn in laterally.
9/ A device according to any preceding claim, characterized in that said collar (10) is frustoconical in profile.
10/ A device according to any preceding claim, characterized in that the top edge of said sleeve (1) is beveled.