| 摘要 |
<p>A nonreturn valve arrangement for a device for suction of body liquids comprises a two-part housing (1), and an intermediate plate (15) and a membrane (16) inserted internally in a sealed manner between the parts (4, 6) of the housing. The membrane (16) has valve flap sections and, together with bores (10, 20, 24, 25) in the housing parts (4, 6) and in the intermediate plate (15), forms, on the one hand, a nonreturn valve (26) between the intake connecting piece (2) and a pump connecting piece (5) and, on the other hand, a nonreturn valve (27) between the pump connecting piece (5) and a lateral outlet (3). The nonreturn valves are preloaded in the closing position by the elasticity of the membrane. When the liquid is sucked through the intake connecting piece (2) to the pump connecting piece (5), the nonreturn valve (26) between the intake connecting piece (2) and the pump connecting piece (5) opens, whereas when the body liquid is pumped from the pump connecting piece (5) to the outlet (3), the nonreturn valve (27) between the pump connecting piece (5) and the lateral outlet (3) opens.</p> |
