US3907152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
End closures for metal drums
Assignee: Gallay SA
•
Filing: 1972-05-31
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Granted: 1975-09-23
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Expires: 1992-05-31
Abstract
Abstract The end closure comprising a peripheral cylindrical wall which is fitted in the cylindrical body and a substantially planar lateral wall axially offset relative to the free outer edge of the peripheral wall. The peripheral wall of the end closure is connected to the lateral wall by a small rounded channel followed radially inwardly by a connecting fillet. The lateral wall has at least one inverted U-shaped stiffening channel much larger than the rounded channel and extending into the cylindrical body. If the lateral wall is 8/10 mm sheet metal and the diameter of the drum 600 mm, two such stiffening channels are provided. Each stiffening channel is located in an annular peripheral zone formed by the outer third of the area of the end closure.
Inventors
- 👤 Eugene Wessely
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:35
CPC Classifications
B; B65; B65D; B65D7/00; B65D7/42; B21; B21D; B21D51/00; B21D51/16; B21D51/26; B21D51/30; B21D51/32
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
185 words
A metal drum comprising a cylindrical body having steel metal end closures at both ends thereof, each said clousure having a cylindrical wall that fits inside the corresponding end of the cylindrical body of the drum, each said closure comprising a wall perpendicular to the axis of the cylindrical body of the drum and spaced axially inwardly from an outer edge of the cylindrical body, each said closure having a small doWnwardly opening rounded turnover channel interconnecting said cylindrical wall and said perpendicular wall, a connecting fillet in each end closure radially inwardly following said turnover channel, said perpendicular wall having at least one protective expansion zone projecting only inwardly into the cylindrical body of the drum in a direction opposite the associated outer edge of the cylindrical body of the drum, said at least one expansion zone comprising an inverted U-shaped expansible stiffening channel both the width and the height of which are very much greater than those of the said turnover channel, and said perpendicular wall being flat apart from said turnover channel and fillet and said at least one U-shaped stiffening channel.
Claim 2
Dependent Claim
185 words
A metal drum comprising a cylindrical body having steel metal end closures at both ends thereof, each said clousure having a cylindrical wall that fits inside the corresponding end of the cylindrical body of the drum, each said closure comprising a wall perpendicular to the axis of the cylindrical body of the drum and spaced axially inwardly from an outer edge of the cylindrical body, each said closure having a small doWnwardly opening rounded turnover channel interconnecting said cylindrical wall and said perpendicular wall, a connecting fillet in each end closure radially inwardly following said turnover channel, said perpendicular wall having at least one protective expansion zone projecting only inwardly into the cylindrical body of the drum in a direction opposite the associated outer edge of the cylindrical body of the drum, said at least one expansion zone comprising an inverted U-shaped expansible stiffening channel both the width and the height of which are very much greater than those of the said turnover channel, and said perpendicular wall being flat apart from said turnover channel and fillet and said at least one U-shaped stiffening channel.
Claim 3
Dependent Claim
32 words
A metal drum according to claim 1, wherein when the end closures are of 8/10 mm sheet metal and the diameter of the cylindrical body 600 mm, two expansion zones are provided.
Claim 4
Dependent Claim
36 words
A metal drum according to claim 2, wherein said protective expansion zone which is nearest the center of the closure is substantially closer to the periphery of the closure than to the center of the closure.
Claim 5
Dependent Claim
31 words
A metal drum according to claim 1, wherein each U-shaped expansible stiffening channel has a semi-circular portion joined to said perpendicular wall by two slightly divergent panels and by connecting fillets.
Claim 6
Dependent Claim
25 words
A metal drum according to claim 4, wherein each of the said divergent panels makes an angle approaching a right angle with said perpendicular wall.
Claim 7
Dependent Claim
39 words
A metal drum according to claim 4, wherein the width of each U-shaped expansible stiffening channel determined at the points the connecting fillets meet perpendicular wall is at least 0.75 of the height of said U-shaped expansible stiffening channel.
Claim 8
Dependent Claim
42 words
A metal drum according to claim 1, wherein the height of each U-shaped expansible stiffening channel measured from said perpendicular wall of the end closure is equal to at least 2% of the diameter of the cylindrical wall of the end closure.
Claim 9
Dependent Claim
59 words
A metal drum according to claim 1, wherein the distance said perpendicular wall drum is axially offset relative to the free outer edge of cylindrical body of the drum is such that when the drum is loaded and is disposed upright on a supporting surface, the said perpendicular wall is always maintained out of contact with the supporting surface.
Claim 10
Dependent Claim
28 words
A metal drum according to claim 1, wherein the radius of the small turnover channel is reduced to a minimum for the material forming the corresponding end closure.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-22 | 1979-03-24 | 1979-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-22 | 1983-03-24 | 1983-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-22 | 1987-03-24 | 1987-09-23 | $7700.00 | Window Closed / Lapsed |