Pump for cosmetic product vial provided with air purging means

Abstract

A pump for a vial intended to contain a cosmetic product includes a variable-volume dosing chamber defined at least partially by a deformable element. The pump operates by varying the volume of the chamber by elastic deformation of a membrane of the deformable element from an initial state wherein the chamber has a maximum volume to a deformed state wherein the volume of the chamber is minimal. The chamber is provided with a product inlet orifice and a product outlet orifice, and the pump includes deformation means of the membrane configured to exert pressure on the membrane. Finally, the pump includes means to purge the air from the chamber, that is activated when the membrane is in its deformed state, the purging means enabling the dosing chamber to communicate with the outside of the pump.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]This application claims priority under 35 U.S.C. § 119(a) to French patent application number 1874128, filed on Dec. 24, 2018, the entire teachings of which are incorporated herein by reference.BACKGROUND OF THE INVENTIONField of the Invention[0002]The invention relates to a pump for a cosmetic product vial that is provided with air purging means. The invention also relates to a vial comprising such a pump.Description of the Related Art[0003]Some cosmetic product vials are provided with a pump configured to suction the cosmetic product contained in the reservoir of the vial for the purpose of dispensing it, for example by means of a nozzle or a simple opening. The product can therefore be extracted or sprayed from the vial to allow the application thereof. The pump is often actuated by means of a push button on which the user exerts pressure to trigger the functioning of the pump. The pump in particular comprises a dosing chamber with a v...

AI Technical Summary

Benefits of technology

This solution effectively removes trapped air, ensuring consistent fluid pressure and improving spray quality by interrupting dispensing abruptly, preventing large droplets and maintaining product flow quality.

Problems solved by technology

The problem with these pumps is that they feature metal parts, such as springs, that are in contact with the product to be dispensed, and complicate the sorting of the components for the recycling of the pump.

Nonetheless, the prior art does not provide any information relating to the purge of the pump when air has penetrated in the dosing chamber.

For “airless” dispensing systems, air can get trapped in the reservoir when the dispensing system is attached to the reservoir, which is filled with the product.

With a pre-compression pump, actuating the pump and the reduction of the volume of the dosing chamber containing air causes a compression of the air present in the chamber, without generating sufficient overpressure to cause the outlet valve to open, and compressed air therefore remains trapped inside the dosing chamber.

Therefore, the pump cannot be primed.

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