Cover assembly for permitting access into a container without removal therefrom

Claim 1

A cover assembly for a container, permitting access into said container without removal therefrom, said cover assembly comprising: a base body having a cylindrical wall defining an axial bore therethrough with a lower portion for engaging an entry of said container, an upper portion to be exposed exteriorly of said container, and an annular flange extending inwardly and radially from said cylindrical wall into said axial bore; a shield mounted to said upper portion of said base body and having a central opening aligned with said axial bore of said base body; a valve device having a coil spring provided within said axial bore and placed on said annular flange, a hollow cylinder-shaped valve seat provided axially in said axial bore of said base body and inserted into said coil spring such that said valve seat is in communication with said container, said valve seat having an outwardly and radially extending press member biased by said coil spring toward said shield, and a blocking valve with a spherical external face and an axial hole extending therethrough, said blocking valve being provided between said valve seat and said shield and being connected pivotally to said shield such that said blocking valve is pivotable relative to said shield between a first position, wherein said axial hole of said blocking valve is communicated with said central opening of said shield and said container via said valve seat, and a second position wherein said spherical face covers said valve seat, thereby blocking communication between said central opening of said shield and said valve seat; and said shield having an internal surface facing said valve device, an external surface opposite to said internal surface, and two aligned protrusions formed on said external surface at two sides of said central opening for protecting an upper portion of said blocking valve.