US 11,718,465 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
Filed by SILGAN DISPENSING SYSTEMS LE TREPORT S.A.S., Richmond, VA (US)
Filed on Jun. 9, 2022, as Appl. No. 17/836,433.
Application 17/836,433 is a continuation of application No. 16/417,431, filed on May 20, 2019, granted, now 11,370,597.
Claims priority of application No. 1854168 (FR), filed on May 18, 2018.
Prior Publication US 2022/0297922 A1, Sep. 22, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. B65D 83/00 (2006.01)
CPC B65D 83/0033 (2013.01) 12 Claims
OG exemplary drawing
 
1. A dispenser, comprising:
a reservoir, comprising:
a bottom;
a neck opposite the bottom; and
an inner wall between the bottom and the neck;
a dispenser attached to the neck of the reservoir;
a piston seated in the reservoir, comprising:
a crown, comprising:
a crown central part;
an outer surface; and
a plurality of guiding tabs extending from the outer surface and oriented towards the neck of the reservoir, each of said plurality of guiding tabs comprising a free end, wherein each free end is in contact with the inner wall of the reservoir;
a flexible disk, comprising:
a central part; and
a sealing lip in contact with the inner wall of the reservoir;
wherein the crown is molded from a material selected from the group consisting of polyethylene, propylene, and polystyrene; and, wherein the crown further comprises at least one anti-microbial agent in the crown material.