| 摘要 |
DRAINAGE RECEPTACLE WITH ANTI-REFLUX DEVICE An anti-reflux device comprising, a drainage receptacle having a chamber and a wall defining a lumen communicating with the chamber. The receptacle has an annular valve seat facing away from the lumen. The device has an elastic valve element having an elongated stem, and a disc connected to one end of the stem and having an upper surface normally sealingly engaging against the seat. The valve element has a retaining member for retaining the other end of the stem to the wall with the disc biased against the seat and with the retaining member defining an opening to permit passage of liquid therethrough. |
