Tube dependent anti-free-flow valve

Details Tube dependent anti-free-flow valve Tube dependent anti-free-flow valve

A - Human Necessities

61

M

A61M 39/24 (2006.01) A61J 15/00 (2006.01) A61M 5/175 (2006.01)

Patent

CA 2401366

The present invention relates to an anti-free-flow valve (16) to prevent fluid free-flow through a tube assembly (14) having a lumen (30). The valve device (16) comprises a body (44) disposed inside the lumen (30) having a cylindrical portion (56) formed adjacent a tapered portion (60), the cylindrical portion (56) includes an opening (52) and the tapered portion (60) has a pair of beveled surfaces (62) with ends (48) that form a slit (50) therebetween. The slit (50) communicates with the opening (52) through a passage (64) formed through the body (44) of the valve device (16). When the tube assembly (14) is in a relaxed condition, the ends (48) of the beveled surfaces (62) confront one another and place the slit (50) in the closed position which prevents fluid flow through the passage (64) of the body (44) and through the valve device (16). When a tensile force (A) is applied along the tube assembly (14) in an area adjacent the valve device (16), the inner diameter of the lumen (30) decreases which elongates the body (44) and urges the ends (48) of the beveled surfaces (62) away from one another and places the slit (50) in the open position which permits fluid flow through the passage (64) and out the body (44) of the valve device (16).

L'invention concerne une soupape (16) anti-écoulement libre qui empêche un fluide de s'écouler librement à travers un ensemble (14) tuyau comportant une lumière (30). Le dispositif de soupape (16) comporte un corps (44) placé à l'intérieur de la lumière (30), qui présente une partie (56) cylindrique formée de façon adjacente à une partie (60) conique ; la partie (56) cylindrique comprend une ouverture (52) et la partie (60) conique présente deux surfaces (62) biseautées dont les extrémités (48) forment une fente (50). La fente (50) communique avec l'ouverture (52) par un passage (64) formé à travers le corps (44) du dispositif de soupape (16). Dans l'état relâché de l'ensemble tuyau (14), les extrémités (48) des surfaces (62) biseautées appuient l'une contre l'autre, mettant ainsi la fente (50) en position fermée et empêchant le fluide de s'écouler à travers le passage (64) du corps (44) et le dispositif de soupape (16). Quand une force de traction (A) est appliquée sur l'ensemble tuyau (14) dans une zone adjacente au dispositif de soupape (16), le diamètre interne de la lumière (30) diminue, ce qui entraîne un allongement du corps (44), la séparation des extrémités (48) des surfaces (62) biseautées et la mise en position ouverte de la fente (50), permettant ainsi au fluide de s'écouler librement à travers le passage (64) et hors du corps (44) du dispositif de soupape (16).

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