Salvage drum
US4708258A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 4, 1987 |
| Grant date | Nov 24, 1987 |
| Priority date | — |
| Expiry date | Mar 4, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S220/908
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A molded polyethylene salvage drum for containing hazardous wastes has a container having a solid side wall and a lid having a circular double-walled body. The container has a top portion provided on its exterior surface with male threads, an enlarged portion adjacent the threads, and a lower side wall portion adjacent the enlarged portion. An annular shoulder is formed on the container between the portion of enlarged diameter and the lower side wall. The lid has a skirt depending from the body of the lid. The interior surface of the skirt is provided with female threads mating with the male threads of the container. Castellations project upwardly from the lid body around the periphery thereof. The lid is molded so as to provide a plurality of kiss-off sections, in which the two walls of the body are molded together during rotational molding of the lid. The skirt of the lid terminates at its lower end in an outwardly extending lip with the outer diameter of the lip equal to the outer diameter of the enlarged diameter portion of the container. A gasket is provided in a circular recess in the lid for sealing engagement with the top edge of the container.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.