A CHECK VALVE, IN PARTICULAR FOR MEDICAL APPLICATIONS

摘要

A check valve in particular for medical applications has a first hose connecting casing and a second hose connecting casing and a membrane disk configured between the two hose connecting casings. The membrane disk is made of a resilient material and cooperates with an annular valve seat. The membrane disk is fitted radially outside the valves seat with apertures leading to a discharge space. The wall (26) of the second hose connecting casing (4) is opposite the apertures (20) and fitted with a surface (29) curved away from the membrane (6) toward the discharge channel (24). The discharge channel (24) is fitted with an intake mouth (27) in the wall (26), the diameter of said mouth being less than that of the discharge channel (24). The discharge channel (24) conically tapers within a transition segment (31) toward the intake mouth (27). Recesses (28) communicating with the discharge space (22) are fitted into the transition segment (31) and are dimensioned in a way to substantially compensate the different flow cross- sections between the intake mouth (27) and the discharge channel (24).