Valve with outlet flow rate regulation, and container equipped with such a valve

Abstract

A valve (1), particularly for an aerosol container, includes, inside a valve body (2), an inlet passage (4) communicating with the container and an outlet passage (10), a first elastic return (16) for urging the valve (1) into the closed position, and a regulator for regulating the product outlet flow rate, which includes a second elastic return (14) for supplying a set-point pressure for the regulator. The second elastic return (14) is arranged in a compartment (12) of the valve body (2) isolated from the product, the pressure inside the compartment (12) being equal to atmospheric pressure.

Description

BACKGROUND OF THE INVENTION1. Field of the InventionThe present invention relates to a valve of an aerosol container for example, intended for dispensing a product at an essentially constant flow rate, for example, a cosmetic product. The invention is most particularly suited for dispensing deodorants or hairstyling products, especially lacquers or mousses.2. Description of the Related ArtModernly, the problem of variations in performance between the initial use of a container and the final use is encountered in the field of aerosol dispensers. These problems arise, in particular, in devices in which the product is pressurized by means of a compressed gas, especially carbon dioxide or nitrogen dioxide. In such devices, the gas is either directly in contact with the product or isolated from the product by a piston or a bag containing the product. The variations in flow rate and / or pressure are directly associated with the pressure drops inside the container, which inevitably cause a ...

AI Technical Summary

Benefits of technology

Advantageously, the moving piston is mounted slidably inside the regulating chamber. The seal between the compartment containing the calibrated spring and the compartment forming the actual regulating chamber is improved by using a flexible diaphragm arranged inside the body of the regulating chamber between the piston and the calibrated spring. As a preference, such a diaphragm is overmoulded or two-shot injection moulded with the body of the regulating chamber. This diaphragm improves the seal between the two comp

Problems solved by technology

Modernly, the problem of variations in performance between the initial use of a container and the final use is encountered in the field of aerosol dispensers.

These problems arise, in particular, in devices in which the product is pressurized by means of a compressed gas, especially carbon dioxide or nitrogen dioxide.

The variations in flow rate and/or pressure are directly associated with the pressure drops inside the container, which inevitably cause a drop in product outlet flow rate.

One of the drawbacks associated with such a regulating system stems from the fact that the calibrated spring is arranged in a part of the valve body in communication with the product.

Thus, for each new formulation, it is necessary to use a different calibra

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