Patent US3870218A successfully refreshed from Google Patents.
US3870218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for effecting a close engagement between layers of sheet metal when making laminated pressure containers
Assignee: Fried Krupp AG
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Filing: 1973-08-21
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Granted: 1975-03-11
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Expires: 1993-08-21
Abstract
Abstract A method of and device for making laminated pressure containers, according to which the metal sheet to be applied onto another metal sheet, e.g. of a core pipe, is provided with two rows of bores at the ends of the metal sheet to be applied. These bores are engaged by two rows of studs which are operable respectively to enter the two rows of bores and to pull toward each other the metal sheet ends provided with the bores, whereupon the pulled together ends are welded together.
Inventors
- 👤 Joachim Ehle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:07
CPC Classifications
B; B23; B23K; B23K37/00; B23K37/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A device for making a cylindrical pressure container by means of a core pipe and at least one sheet metal layer to be placed therearound and provided with two rows of bores respectively arranged near the end edges of said sheet metal layer, which includes: first supporting means, a first series of studs pivotally supported by said first supporting means for engagement with one of the rows of bores in said sheet metal layer, second supporting means movable selectively relative toward and away from said first series of studs, a second series of studs pivotally supported by said second supporting means for engagement with the other row of bores, and means operatively connected to said first and second supporting means for actuating the same.
Claim 2
Independent Claim
124 words
A device for making a cylindrical pressure container by means of a core pipe and at least one sheet metal layer to be placed therearound and provided with two rows of bores respectively arranged near the end edges of said sheet metal layer, which includes: first supporting means, a first series of studs pivotally supported by said first supporting means for engagement with one of the rows of bores in said sheet metal layer, second supporting means movable selectively relative toward and away from said first series of studs, a second series of studs pivotally supported by said second supporting means for engagement with the other row of bores, and means operatively connected to said first and second supporting means for actuating the same.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-10 | 1978-09-09 | 1979-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-10 | 1982-09-09 | 1983-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-10 | 1986-09-09 | 1987-03-11 | $7700.00 | Window Closed / Lapsed |