Device for dispensing a fluid product

Patent metadata

Field	Value
Publication number	US-2023398561-A1
Application number	US-202118034744-A
Country	US
Kind code	A1
Filing date	Nov 2, 2021
Priority date	Nov 2, 2020
Publication date	Dec 14, 2023
Grant date	—

Abstract

A fluid product dispensing device having a reservoir with a dose of fluid product, a piston-stopper mounted to slide in the reservoir, a dispensing head with a dispensing orifice axially movable to move the piston-stopper to dispense the fluid product. The piston-stopper has a hollow sleeve with a central receiving zone substantially at the axial and radial center of the piston plug. A shut-off element is positioned in the central receiving zone in a shutting-off position and, during actuation, expelled from the shutting-off position towards an open position. The central receiving zone is extended axially on one side by a lower receiving zone having two wall parts separated by at two axially extending radial grooves, the wall parts holding the shut-off element in its open position, with the fluid product able, during actuation, to flow from the reservoir around the shut-off element in the open position towards the dispensing orifice.

First claim

1 . A fluid product dispensing device comprising a reservoir containing at least one dose of fluid product, a piston-stopper mounted with the ability to slide in said reservoir in order to dispense fluid product, a dispensing head, provided with a dispensing orifice, and able to move axially with respect to said reservoir so as to move said piston-stopper in said reservoir in order thus to dispense the fluid product through said dispensing orifice, said piston-stopper comprising a hollow sleeve provided with a central receiving zone arranged substantially at the axial and radial centre of said piston plug, a shut-off element being positioned in said central receiving zone in a shutting-off position and being, during actuation, expelled from said shutting-off position towards an open position, characterized in that said central receiving zone is extended axially on one side by a lower receiving zone comprising at least two wall parts separated by at least two axially extending radial grooves, said wall parts of said lower receiving zone holding said shut-off element in its open position, with the fluid product being able, during actuation, to flow from said reservoir around said shut-off element in the open position via said radial grooves towards said dispensing orifice.

2 . The device according to claim 1 , wherein said piston-stopper comprises an upper receiving zone comprising at least two wall parts separated by at least two radial grooves extending axially, said upper receiving zone being symmetrical relative to said lower receiving zone, such that said piston-stopper is symmetrical and can be used equally well in one direction or the other.

3 . The device according to claim 2 , wherein each reception zone has a slightly conical shape flaring radially outwards from the central reception zone.

4 . The device according to claim 3 , wherein the maximum inside diameter of said wall parts is situated at the outer axial edge of each upper and lower receiving zone, said maximum inside diameter being substantially identical to the maximum outside diameter of said shut-off element.

5 . The device according to claim 2 , wherein each receiving zone comprises four wall parts and four radial grooves distributed over the periphery.

6 . The device according to claim 1 , wherein said piston-stopper comprises an outer sealing part, formed on the outer periphery of said hollow sleeve, said sealing part comprising at least one peripheral bead which provides sealing against an inner side wall of said reservoir.

7 . The device according to claim 6 , wherein said shut-off element, in the shutting-off position, exerts a radial force on said external sealing part, increasing the interaction between said piston-stopper and said reservoir and therefore the sealing, and during actuation, when said shut-off element is expelled from its shutting-off position, the interaction between said piston-stopper and said reservoir decreases, thus facilitating the movement of said piston-stopper in said reservoir during actuation.

8 . The device according to claim 1 , wherein said shut-off element is spherical, such as a ball.

9 . The device according to claim 1 , wherein said central receiving zone is defined between an upper narrowing and a lower narrowing, such that in the shutting-off position, there are two peripheral sealing surfaces between said sealing element and said piston-stopper.

10 . The device according to claim 1 , wherein said dispensing head includes a dispensing channel that connects an opening tip to said dispensing orifice, said opening tip co-operating with said shut-off element during actuation so as to move it from its shutting-off position to its open position, said opening tip including one or more openings at its axial end, such as holes or slots, that enable fluid product to pass when said opening tip is in contact with said shut-off element.

11 . The device according to claim 1 , wherein said reservoir contains two doses of fluid product, dispensed in two successive actuations.

12 . The device according to claim 1 , wherein said reservoir contains one single dose of fluid product, dispensed in one single actuation.

Assignees

• Aptar France Sas

Inventors

• Gomez Thomas
• Le Faou Philippe
• Mghimimi Khaoula
• Tekce Ege

Classifications

• B05B11/02 Primary

  Membranes or pistons acting on the contents inside the container, e.g. follower pistons · CPC title

• A61M5/2455

  with sealing means to be broken or opened · CPC title

• A61M11/007

  Syringe-type or piston-type sprayers or atomisers · CPC title

• A61M15/0036

  hollow piercing means · CPC title

• A61M15/0028

  using prepacked dosages, one for each application, e.g. capsules to be perforated or broken-up · CPC title