US3949877A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nestable drum
Assignee: Greif Inc
•
Filing: 1974-03-04
•
Granted: 1976-04-13
•
Expires: 1994-03-04
Abstract
Abstract A nestable drum is provided with a tubular shell having a lower section and a top section of increased diameter joined by an integral step located approximately at the shell middle. The larger diameter top section is adapted to conveniently receive the reduced bottom section to facilitate nesting when drums are stacked one upon the other. The step is formed with a series of spaced reinforcing gussets which are adapted to rest on the top end of a lower drum in the stack. The top of the shell is necked-in and possesses a diameter less than that of the top section and is curled outwardly to provide a bead which receives a cover locked in place by a split clamping ring. One form of cover is provided with an indentation which is adapted to receive the bottom closure of a stacked drum to lock it in place and thereby prevent any relative sliding.
Inventors
- 👤 Cesar Santoni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:32
CPC Classifications
B; B65; B65D; B65D7/00; B65D7/02; B65D21/00; B65D21/02; B65D21/0233
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
343 words
A large nestable drum of multi-gallon capacity and capable of containing heavy leads with space saving capabilities comprising in combination: a high strength large metal tubular shell, the tubular shell being formed with a welded seam and having a bottom end and a top end, and further being divided into a bottom substantially vertical sided tubular section having a top and bottom and a top substantially vertical sided tubular section having a top and bottom and the major portion of which having essentially the same radius of curvature from its top to its bottom the top section and the bottom section being interconnected by an integral circumferential step intermediate the shell ends and extending substantially at a continuous uniform axial point about the circumference of the shell, the top section possessing a larger cross-section than the bottom section, the larger top section being initially formed with the same gauge material as the bottom section and being expanded to the larger cross-section and becoming thinner than the bottom section to provide a larger size drum without the necessity of additional material, the bottom section being adapted to be received by and nest in the open top section of another of such drums when stacked one above the other, the step including anti-locking means for preventing the stacked drums from being air locked together; the anti-locking means being defined by a series of spaced outwardly extending reinforcing gussets forming an integral part of the step, the gussets being formed of outwardly and downwardly projecting substantially arcuate protuberances spaced about the circumference of the drum and when the bottom section of one drum being nested in the open top section of another of such drums the protuberances of the upper drum resting on the top end of the lower drum to provide only a predetermined number of point contacts with the top end of a lower drum thereby providing minimum surface contact and engagement with the lower drum so as to reduce scuffing of surface of the stacked drums; and a closure at the bottom end.
Claim 2
Dependent Claim
343 words
A large nestable drum of multi-gallon capacity and capable of containing heavy leads with space saving capabilities comprising in combination: a high strength large metal tubular shell, the tubular shell being formed with a welded seam and having a bottom end and a top end, and further being divided into a bottom substantially vertical sided tubular section having a top and bottom and a top substantially vertical sided tubular section having a top and bottom and the major portion of which having essentially the same radius of curvature from its top to its bottom the top section and the bottom section being interconnected by an integral circumferential step intermediate the shell ends and extending substantially at a continuous uniform axial point about the circumference of the shell, the top section possessing a larger cross-section than the bottom section, the larger top section being initially formed with the same gauge material as the bottom section and being expanded to the larger cross-section and becoming thinner than the bottom section to provide a larger size drum without the necessity of additional material, the bottom section being adapted to be received by and nest in the open top section of another of such drums when stacked one above the other, the step including anti-locking means for preventing the stacked drums from being air locked together; the anti-locking means being defined by a series of spaced outwardly extending reinforcing gussets forming an integral part of the step, the gussets being formed of outwardly and downwardly projecting substantially arcuate protuberances spaced about the circumference of the drum and when the bottom section of one drum being nested in the open top section of another of such drums the protuberances of the upper drum resting on the top end of the lower drum to provide only a predetermined number of point contacts with the top end of a lower drum thereby providing minimum surface contact and engagement with the lower drum so as to reduce scuffing of surface of the stacked drums; and a closure at the bottom end.
Claim 3
Dependent Claim
53 words
The invention in accordance with claim 1, wherein the top end is necked in and possesses a smaller cross-section than the top section for protecting the inwardly extending top end and thereby preventing dislargement of a cover placed over the top end when subject to rough handling and abuse during shipment and storage.
Claim 4
Dependent Claim
26 words
The invention in accordance with claim 1, wherein the top end is formed into a top body outwardly extending curl defining an outer peripherally extending bead.
Claim 5
Dependent Claim
63 words
The invention in accordance with claim 1, wherein the top end is formed into a top body outwardly extending curl defining an outer peripherally extending bead, a cover having a peripherally extending identation over the top end surfaces of the bottom closure of a stacked drum adapted to extend into the indentation of cover to lock the stacked drums and prevent lateral sliding.
Claim 6
Dependent Claim
33 words
The invention in accordance with claim 1, wherein the drum is circular in cross-section throughout its length, and a plurality of body rolling hoops are formed integrally as part of the top section.
Claim 7
Dependent Claim
37 words
The invention in accordance with claim 1, wherein the drum and cross-section includes transversely convex sides joined together by rounded corners, and a plurality of body rolling hoops are formed integrally as part of the top section.
References Cited (Backward Citations)
US112477A
Cited
US1331372A
Cited
US1351900A
Cited
US1770163A
Cited
US2114137A
Cited
US2205685A
Cited
US2239093A
Cited
US3205677A
Cited
US3168222A
Cited
US3187934A
Cited
US3272671A
Cited
US3353707A
Cited
US3425382A
Cited
US3653581A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-04-13 | 1979-10-13 | 1980-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-13 | 1983-10-13 | 1984-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-13 | 1987-10-13 | 1988-04-13 | $7700.00 | Window Closed / Lapsed |