SELF-EMPTYING PLUG

摘要

A self-emptying plug for a container of liquid which comprises: (a) a plug body (5) adapted to fit into a hole in a container, the plug body having a first outlet (16) for liquid therethrough and also being provided with valve guide means (13); (b) a cap means (1) adapted to fit over the plug body, the cap having a second outlet (10) for liquid therethrough; (c) valve means (3), having a head (11) and a stem (12), the stem being adapted to slide within the guide means and the head being adapted to bear against a valve seat means (2), as defined below; (d) spring means (4) adapted to force the valve head against the valve seat means, the spring means being further adapted to collapse at a selected hydrostatic pressure; and (e) valve seat means, as mentioned under (c) and (d), adapted to be located between the plug body and the cap means, whereby as hydrostatic pressure in the container increases to a selected pressure, the valve head is forced out of contact with the valve seat allowing liquid to flow through the first and second outlets out of the container.