Leakproof one-way valve for use with vacuum attachment

Details Leakproof one-way valve for use with vacuum attachment Leakproof one-way valve for use with vacuum attachment

F - Mech Eng,Light,Heat,Weapons

16

K

F16K 15/14 (2006.01) B65D 81/20 (2006.01)

Patent

CA 2559873

A one-way valve allows air to be drawn from a collapsible, flexible, airtight bag using a vacuum source. When the vacuum source is removed, the one-way valve prevents air from re~entering the bag. The valve assembly comprises a base, a valve element supported by the base, and a cap fitted onto an end of the base that is disposed in the exterior of the bag. The base comprises a flange that is disposed in the interior of the bag and is joined to a peripheral area surrounding a hole in one wall of the bag. One surface of the flange has a series of concentric heat - concentrating circular beads for speeding up the conduction heat sealing operation by which the valve assembly is attached to the bag. The valve cap is provided with a circular wall that presses the diaphragm of the valve element against a circular bead on an annular seat formed on the base for supporting the valve element.

L'invention concerne une valve de retenue permettant d'évacuer de l'air d'une poche flexible pliable étanche à l'air à l'aide d'une source de vide. Lorsque la source de vide est retirée, la valve de retenue empêche l'air d'entrer à nouveau dans la poche. L'ensemble valve comprend une base, un élément de valve supporté par la base, et un bouchon fixé sur une extrémité de la base disposée à l'extérieur de la poche. La base comprend un rebord disposé à l'intérieur de la poche et relié à la zone périphérique entourant un orifice dans une paroi de la poche. Une surface du rebord présente une série d'éléments circulaires concentriques concentrateurs de chaleur destinés à accélérer l'opération de thermoscellage par laquelle l'ensemble valve est rattaché à la poche. Le bouchon de la valve comprend une paroi circulaire comprimant le diaphragme de l'élément de valve contre un élément circulaire sur un siège annulaire formé sur la base pour supporter l'élément de valve.

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