Piston for a reservoir of a dispenser of a fluid product without air intake
AssigneeSilgan Dispensing Systems Le Treport S.A.S.
InventorsEric Rossignol, Emir Ezzina, Etienne Briere
Life of this patent
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Abstract
A piston for a reservoir of a dispenser of a fluid product without air intake, and presenting a central axis X includes both sealing means and also guiding means. The sealing means extend in a plane orthogonal to the axis X and define a single external sealing line in a closed loop, distal from the axis X, capable of coming into contact with an inner wall of the reservoir 10. The guiding means include a base from which extends one or more tabs with free ends defining external guide points, distal from the axis X, capable of coming into contact with the inner wall of the reservoir.
Claims10
A piston, comprising:
- a base, comprising:
- a concave base central part;
- an outer surface;
- and
- a plurality of guiding tabs extending from the outer surface and oriented tangentially away from the outer surface, each of said plurality of guiding tabs comprising a free end;
- and
- a rounded form on the free end of each of the plurality of guiding tabs;
- a flexible disk, comprising:
- a concave disk central part;
- and
- a sealing lip extending away from the concave disk central part;
- wherein the concave base central part is seated in the concave disk central part.
A piston, comprising:
- a base, comprising:
- a concave base central part;
- an outer surface;
- and
- a plurality of guiding tabs extending from the outer surface and oriented tangentially away from the outer surface, each of said plurality of guiding tabs comprising a free end;
- a flexible disk, comprising:
- a concave disk central part;
- and
- a sealing lip extending away from the concave disk central part and having a periphery with a diameter Ø;
- a distance H between the free end of one of said plurality of guiding tabs and the periphery of the sealing lip directly beneath said free end;
- and
- wherein H/Ø is greater than ¼.
A piston, comprising:
- a base, comprising:
- a concave base central part;
- an outer surface;
- and
- a plurality of guiding tabs extending from the outer surface and oriented tangentially away from the outer surface, each of said plurality of guiding tabs comprising a free end with a skid-type surface on each free end;
- a flexible disk, comprising:
- a concave disk central part;
- and
- a sealing lip extending away from the concave disk central part;
- wherein the concave base central part is seated in the concave disk central part.
Dependencies are inferred from the claim text.