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

US11370597B2 · kind B2 · utility

Inventors

• Eric Rossignol · Minusio, CH
• Emir Ezzina · Montigny-le-Bretonneux, FR
• Etienne BRIERE · Paris, FR

Key dates

• Filing date: May 20, 2019
• Grant date: Jun 28, 2022
• Expiry date: May 20, 2039

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B65D83/76
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

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.