Drum liner locking and locating assembly
AssigneeRussell-Stanley Corporation
InventorsWilliam Lima, Earl V. Lind
Life of this patent
Estimating the term…
Abstract
A drum liner locking and locating apparatus is provided for securing a drum liner to a drum. The drum liner apparatus primarily comprises a fitting, a liner, and a non-releasable securing means. The fitting is passed through an opening in the lid of a drum before the lid is attached to the drum. The fitting can only be passed through the opening so that the liner is in a position that the liner can expand to the full size of the drum. After the fitting is in place, the non-releasable securing means fastens the fitting to the drum raising the drum liner to the top of the drum. Consequently, to remove the drum liner, the top of the drum must be removed destroying the drum and prohibiting reconditioning or reuse of the drum.
Claims12
A drum liner apparatus associated with a drum comprised of:
- (a) a fitting which is adapted to pass through an opening in the lid of a drum comprising
- i) a collar;
- ii) at least one thread on the exterior surface of the collar;
- iii) a first separation in the thread;
- iv) a second separation in the thread which is smaller than the first;
- v) an upper flange on the exterior of the fitting which provides a bearing surface for a gasket to prevent the liner from being compressed against the inside surface of the drum lid;
- and
- vi) a lower flange on the exterior of the fitting to which the drum liner is attached;
- b) a flexible liner adapted to attach to the fitting;
- c) means for non-releasably securing the fitting to an opening in the lid of a drum;
- and
- d) a first and a second protrusion, extending upwardly from the opening in the lid of the drum, where the second protrusion is smaller than the first and the first and second protrusion fit into the first and second separation on the collar for aligning the flexible liner within the drum.
A process for attaching a drum liner apparatus to a drum comprising the steps of:
- (a) inserting a drum liner fitting comprising:
- i) a collar;
- ii) at least one thread on the exterior surface of the collar;
- iii) a first separation in the thread;
- iv) a second separation in the thread which is smaller than the first;
- v) an upper flange on the exterior of the fitting which provides a bearing surface for a gasket to prevent the liner from being compressed against the inside surface of the drum lid;
- and
- vi) a lower flange on the exterior of the fitting to which the drum liner is attached, into an opening in the lid of the drum;
- (b) aligning the differently sized separations in the thread with correspondingly sized upwardly projecting protrusions in the opening in the lid of the drum to properly align the drum liner in the drum;
- and
- (c) non-releasably securing the drum liner to the drum.
Dependencies are inferred from the claim text.