| 摘要 |
<p>A device (10) for preventing overflow of a container being filled with a liquid, the container having a drainage outlet normally containing a removable plug when being filled, the device comprising a plug (16) for the drainage outlet, a float (12) and a link (14) of a desired length that extends below the plug and has means (36) for retention by a part of the drainage outlet, whereby when the liquid reaches a predetermined level the float causes the link to lift the plug at least partially off the outlet to allow release of liquid through the outlet.</p> |
