| 摘要 |
<p>A one-way duckbill check valve assembly for allowing fluid flow in a first direction and for preventing fluid flow in a second, opposite direction comprises a valve housing (10,12) having first and second ports opening into the housing, and a flow regulator (14) positioned within the housing and including an outer wall (52) which is formed as a substantially cylindrical member. The regulator includes a pair of semi-circular valve lips (38,40) which are oriented in converging relationship to each other to form an outlet slit (28) at one end of the regulator. These valve lips are connected to the outer wall (52) by a pair of concave connecting walls (42,44) and the lips and connecting walls form a pair of cavities on either side of the outlet slit (28). A pair of elongated projections (68,70) are located along diametrically opposing sides of the outer wall (52) for biasing the outer wall inwardly whereby a biasing force is applied to close the lips (38,40). <IMAGE></p> |
