Piston for a reservoir of a dispenser of a fluid product without air intake

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.

Dependencies are inferred from the claim text.