Abstract: A locking device for a drum for chemical- and hazardous-waste containment is described. The locking devices are of drums, usually 30- or 55-gallon sizes, of the closed-end type having a head with two openings or bung holes therethrough. Each drum opening has a flanged or internal portion with interior threads. The locking device has three basic elements, namely, a pair of caps and a slip wrench/locking bar. In one embodiment, one of the caps includes an overpressure relief valve and an flame arrester. Each cap has a threaded base and a larger apertured cylindrical portion mounted thereon. Each cap has a closure gasket mounted at the shoulder formed between the base and the apertured cylinder which gasket permits partial rotation without unsealing the drum. The cylindrical portion of the outer wall has at least two pairs of elongated apertures with 180-degree spacing between the apertures of each pair.

Abstract: A drum lock device is disclosed for an open-head drum which has a flanged lip at the open end with a mating lid therefor. The drum lock device has a lug-type ring closure, a lockable bolt, and a shuttle wrench captively held on the bolt by a cap. The ring closure, which annularly attaches the lid to the lip, has a split therethrough with internally threaded lugs on either side. The shuttle wrench is captively held between the cap and the apertured boss of the bolt, and is slidably positionable between engagement with and disengagement from the lockable bolt. When the shuttle wrench is engaged, the lockable bolt is enabled, and, when the shuttle wrench is disengaged the rotation of the lockable bolt is disabled.