초록

Leaks of hazardous materials that are toxic by inhalation are resisted from shipping drums of substantial capacity by an improved drum seal which resists rotation of a plug relative to an overcap which is locked onto the plug.

대표청구항 ▼

A drum seal for resisting leaks of materials from a shipping drum, comprising: (a) a drum head having an annular neck surrounding a longitudinal axis; (b) a base having an interiorly-threaded portion mounted within, and axially extending along, the neck; (c) a plug having an exteriorly-threaded port

A drum seal for resisting leaks of materials from a shipping drum, comprising: (a) a drum head having an annular neck surrounding a longitudinal axis; (b) a base having an interiorly-threaded portion mounted within, and axially extending along, the neck; (c) a plug having an exteriorly-threaded portion mounted within, and threadedly engaging, the interiorly-threaded portion of the base, said plug having a radially-extending collar which is located axially adjacent the exteriorly-threaded portion; (d) a seal mounted between, and sealingly engaging, the collar and the base to resist leakage of materials past the threadedly-engaged interiorly- and exteriorly-threaded portions; (e) an overcap mounted on the drum head and confining the base, plug and seal; and (f) means for resisting rotation of the plug about the axis during shipping of the drum, including locking means on the overcap, and co-acting means on the collar and cooperatively lockingly engaging the locking means to resist rotation of the plug relative to the overcap.