| 摘要 |
A valve member 22 floats in a liquid within a dispensing container 21 e.g. an IV bottle containing a saline solution. With the liquid level suitably receded the member 22 seals off the outlet of the dispensing container 21 by means of the sealing surface 26 resting on the valve seat 27. The maximum horizontal dimension of the member 22 is greater than the maximum vertical dimension so that the member is constrained to float in the attitude in which surface 26 engages seat 27. Thus surface imperfections, such as the parting line 28 and/or the gate member 30, will never engage seat 27. <IMAGE> |
