Patent US3577284A successfully refreshed from Google Patents.
Patent US3755647A successfully refreshed from Google Patents.
US3755647A
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US
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Method for making a tubular structure
Assignee: Babcock Atlantique SA
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Filing: 1972-02-17
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Granted: 1973-08-28
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Expires: 1992-02-17
Abstract
Abstract This invention is a simple and easy method for making tubular structures of substantial thickness in an effective and efficient manner.
Inventors
- 👤 R Pierart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:52
CPC Classifications
B; B21; B21C; B21C37/00; B21C37/06; B21C37/15; B23; B23K; B23K9/00; B23K9/02; B23K9/038
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
97 words
A method of fabricating a tubular wall structure comprising a plurality of upright weld-united quadrilateral prism shaped sectors including the steps of: cutting each one of a pair of opposing sides in each of the sectors along divergent planes, positioning the sectors to form the tubular wall by having corresponding cut sides abutting in spaced parallel relation to one another, inserting a fusible electrode in each of the spaces between the sectors, striking an arc at the lower end of said electrode, and causing the fusion of the electrode to fill said space thereby welduniting the sectors.
Claim 2
Independent Claim
97 words
A method of fabricating a tubular wall structure comprising a plurality of upright weld-united quadrilateral prism shaped sectors including the steps of: cutting each one of a pair of opposing sides in each of the sectors along divergent planes, positioning the sectors to form the tubular wall by having corresponding cut sides abutting in spaced parallel relation to one another, inserting a fusible electrode in each of the spaces between the sectors, striking an arc at the lower end of said electrode, and causing the fusion of the electrode to fill said space thereby welduniting the sectors.
Claim 3
Dependent Claim
23 words
A method according to claim 1 including the step of closing the side boundAries of each of said spaces during the welding process.
Claim 4
Dependent Claim
23 words
A method according to claim 1 including the step of cooling the side boundaries of each of said spaces during the welding process.
Claim 5
Dependent Claim
23 words
A method according to claim 1 including the step of simultaneously striking an arc at the lower end of each of said electrodes.
Claim 6
Dependent Claim
27 words
A method according to claim 1 including the step of feeding additional fusible metal into each of said spaces during the fusing of the electrode contained therein.
Claim 7
Dependent Claim
22 words
A method according to claim 1 including the step of laminously weld-uniting a plurality of sheets to form each of said sectors.
Claim 8
Dependent Claim
25 words
A method according to claim 1 including the step of machining the interior and exterior surfaces of said tubular structure to achieve a cylindrical configuration.
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) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |