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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 interi

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. The apertures extend, with the cap installed, in the corresponding opening, beyond and external to the drum head with the elongation of the aperture substantially axial to the drum. In operation, the slip wrench looking bar extends through the elongated apertures of both caps and has provision for a padlock installation at one end.

대표청구항 ▼

A locking device for a drum having a head with two openings therethrough, each opening having a flanged portion with interior threads thereabout, said locking device comprising, in combination: a pair of caps, each having at one end an exteriorly threaded portion for cooperative functional relations

A locking device for a drum having a head with two openings therethrough, each opening having a flanged portion with interior threads thereabout, said locking device comprising, in combination: a pair of caps, each having at one end an exteriorly threaded portion for cooperative functional relationship with a corresponding one of said flanged portions and at the other end a wall, in turn, comprising: shoulder means for receiving a closure gasket, said shoulder means being dimensioned to fit within a corresponding one of said drum openings; an open ended cylindrical member with a plurality of pairs of apertures therethrough having 180-degree spacing between the apertures of each pair, said apertures extending, with the cap installed in the corresponding opening, beyond and external to the drum head; a locking bar with an elongated body dimensioned to extend, with both caps installed in the corresponding openings therefor, through the apertures of both caps, said locking bar having means for retention at one end and means for locking at the other end; a closure gasket on said shoulder means, said closure gasket structured of a resilient material so as to permit alignment of the apertures without unsealing the drum; and, whereby, during installation of the locking bar, when the caps are rotated to align the apertures, the drum is maintained in a sealed condition; and, when the locking bar is locked, the rotation of the caps is precluded.