| 摘要 |
<p>A closure device, particularly for drains comprising a conical body (2) and a cage-like element (3), and which comprises a closure plug (7), that can be sealingly associated with each other at the bottom of a container. The device comprises a first pneumatic actuation unit that can be operated by the user at a distance from the drain plug. The first unit actuates at least one second actuation unit that allows to selectively close or open the plug (7). The actuation of the plug (7) is effective, and requires a very small number of components that have a modest bulk and low cost. <IMAGE></p> |
