US 12,434,902 B2
Piston for a reservoir of a dispenser of a fluid product without air intake
Eric Rossignol, Chalon sur Saone (FR); Emir Ezzina, Montigny-le-Bretonneux (FR); and Etienne Briere, Paris (FR)
Assigned to Silgan Dispensing Systems Le Treport S.A.S., Le Treport (FR)
Filed by SILGAN DISPENSING SYSTEMS LE TREPORT S.A.S., Richmond, VA (US)
Filed on Jun. 19, 2023, as Appl. No. 18/211,422.
Application 18/211,422 is a division of application No. 17/836,433, filed on Jun. 9, 2022, granted, now 11,718,465.
Application 17/836,433 is a continuation of application No. 16/417,431, filed on May 20, 2019, granted, now 11,370,597, issued on Jun. 28, 2022.
Claims priority of application No. 1854168 (FR), filed on May 18, 2018.
Prior Publication US 2023/0331459 A1, Oct. 19, 2023
Int. Cl. B65D 83/76 (2025.01)
CPC B65D 83/765 (2025.01) 10 Claims
OG exemplary drawing
 
1. 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.