Back-flow preventor and whirlpool tub therewith

F - Mech Eng,Light,Heat,Weapons – 16 – K

Patent

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Details

F16K 15/02 (2006.01) A61H 9/00 (2006.01)

Patent

CA 2171915

This is a non-return device designed to permit a gas to be diffused under pressure in a liquid; it contains an inlet conduit for the gas which has a check valve with an inner face and an outer face; the valve has two distinct position settings, that is, an open one permitting the passage of a gas stream from the inner face toward the outer face, and a closed one. The device also includes a protective casing for the valve which covers its outer face. The casing has an interior and an exterior, and has a main opening positioned vis-a-vis the gas stream coming from the valve when it is open. The casing also includes a variety of peripheral openings that are not positioned vis-a-vis the gas stream so that when the exterior of the casing is composed of gas, the gas stream coming from the open valve and passing through the main opening creates negative pressure within the said casing. This negative pressure causes the gas that is present to be aspirated from the outside toward the inside of the casing through the peripheral openings, thus purging the casing interior. This non-return device can be used notably in water massage devices to prevent stagnation of the water between the valve and the casing, thereby also preventing proliferation of moulds and bacteria.

Un dispositif anti-retour permettant la diffusion d'un gaz sous pression dans un liquide et comprenant un conduit d'arrivée du gaz pourvu d'une valve anti-retour présentant une face interne et une face externe, cette valve pouvant adopter deux positions distinctes, à savoir une position ouverte permettant le passage d'un flux gazeux de la face interne vers la face externe, et une position fermée. Le dispositif comprend également un boîtier de protection de la valve qui recouvre la face externe de celle-ci. Ce boîtier a un intérieur et un extérieur et est pourvu d'une ouverture principale disposée en regard du flux gazeux provenant de la valve lorsque celle-ci est en position ouverte. Le boîtier comprend également une pluralité d'ouvertures périphériques disposées non en regard du flux gazeux de sorte que lorsque l'extérieur du boîtier est constitué de gaz, le flux gazeux provenant de la valve en position ouverte et passant par l'ouverture principale, provoque une dépression à l'intérieur dudit boîtier. Cette dépression provoque l'aspiration du gaz présent de l'extérieur du boîtier vers l'intérieur de celui-ci par les ouvertures périphériques ce qui produit une purge de l'intérieur dudit boîtier. Ce dispositif anti-retour est notamment utilisable dans des appareils d'hydromassage pour éviter la stagnation de l'eau entre la valve et le boîtier et ainsi la prolifération de moisissures et de bactéries.

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