Check valve, especially for medical use

Details Check valve, especially for medical use Check valve, especially for medical use

A - Human Necessities

61

M

A61M 39/24 (2006.01) F16K 15/14 (2006.01)

Patent

CA 2606540

The invention relates to a non-return valve, particularly for medial applications, comprising a first tube connection housing (2), a second tube connection housing (4) and a diaphragm disk (6), which is made of flexible material, is placed between both tube connection housings, and which, in the existence of an excess pressure inside an entry passage in the first tube connection housing, can be lifted off from a valve seat (12) annularly surrounding an inlet space connected to the entry passage (8). In the existence of an excess pressure inside an outlet passage (24), the diaphragm disk can be securely pressed against the valve seat in the shortest of times, and is provided with an annular bead (14) on its outer peripheral area. This annular bead is accommodated inside opposing annular grooves of the hose connection housing. The diaphragm disk is provided with openings (20) radially outside the valve seat that are connected to an outlet space. A formation (28), which lies on the side of the diaphragm disk (6) facing the outlet space (22) and which holds or prestresses the diaphragm disk (6) in the direction of the inlet space (10), is provided on the wall (26) of the second tube connection housing (4) located opposite the diaphragm disk (6). Said formation (28) is placed inside the boundary given by the valve seat (12).

L'invention concerne un clapet antiretour, notamment à usage médical, comprenant un premier boîtier de raccordement de flexible et un second boîtier de raccordement de flexible, ainsi qu'un disque membranaire disposé entre les deux boîtiers de raccordement de flexible et consistant en un matériau flexible, qui peut être soulevé, en cas de surpression dans un passage d'accès, dans le premier boîtier de raccordement de flexible, par un siège de soupape annulaire, entourant l'espace d'entrée relié au passage d'accès et qui, en cas de surpression dans un passage de sortie, peut être comprimé de manière fiable et dans des temps minimaux, sur le siège de soupape. Le disque membranaire comporte au niveau de sa zone périphérique extérieure, un bourrelet annulaire qui est logé dans des rainures annulaires opposées des boîtiers de raccordement de flexible. Le disque membranaire est muni d'ouvertures, dans le sens radial en dehors du siège de soupape, lesdites ouvertures étant reliées à un espace de sortie. Sur la paroi (26) opposée au disque membranaire (6), du second boîtier de raccordement de flexible (4), il est prévu une formation (28) située sur la face du disque membranaire (6) tournée vers l'espace de sortie (22). Ladite formation maintient ou contraint le disque membranaire (6) en direction de l'espace d'entrée (10). Ladite formation (28) est disposée à l'intérieur de la limite définie par le siège de soupape (12).

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