Self-closing valve arrangement for the dispensing opening of...

B - Operations – Transporting – 65 – D

Patent

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Details

B65D 47/20 (2006.01)

Patent

CA 2311357

The invention relates to a self-closing valve arrangement for use in the dispensing opening of a container, a closing cap or the like. Said valve arrangement comprises a first closing element (7) having a concave wall part (11) consisting of elastic material, and a through opening (14) formed in said wall. The wall part can be elastically deformed from a closing position to a releasing position when a first differential pressure force is applied to the surfaces opposite to the wall part by squeezing them. The valve arrangement is also provided with a second closing element (8) having a concave wall part (12) for sealing the through opening when the first closing element is in the closing position. The second closing element (8) can be released from its sealing alignment with the through opening (14) of the first closing element (7) in order to compensate the pressure in a container provided with the valve arrangement when the container is no longer subject to a pressure-increasing squeezing force. In order to achieve said pressure compensation, a second differential pressure force which is directed against the first differential pressure force and which acts by squeezing the opposite surfaces is applied.

L'invention concerne un système de clapet à fermeture automatique à monter dans l'orifice de distribution d'un récipient, dans un capuchon de fermeture ou similaires. Ce système comprend un premier élément de fermeture (7) présentant une partie de paroi (11) cintrée en matériau élastique, contenant une ouverture de passage (14), qui peut être déformée de manière élastique sous l'effet d'une première force de pression différentielle composée de forces agissant sur des surfaces opposées, pour passer d'une position de fermeture à une position de distribution. Ce système comprend en outre un second élément de fermeture (8) présentant une partie de paroi (12) cintrée, pour étanchéifier l'ouverture de passage, lorsque le premier élément de fermeture est en position fermée. Afin de compenser la pression dans un récipient muni du système de clapet, lorsque le récipient ne subit plus l'influence d'une force de compression augmentant la pression, le second élément de fermeture (8) peut être libéré de la relation d'étanchéité par rapport à l'ouverture de passage (14) du premier élément de fermeture (7), sous l'effet d'une seconde force de pression différentielle dirigée à l'encontre de la première force de pression différentielle et composée de forces agissant sur les surfaces opposées.

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