Patent US3774296A successfully refreshed from Google Patents.
US3774296A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing a pressure vessel assembly
Assignee: Hahn and Clay
•
Filing: 1972-09-29
•
Granted: 1973-11-27
•
Expires: 1992-09-29
Abstract
Abstract A pressure vessel assembly and method of assembly, wherein fabricated pressure vessel sections are joined together, usually in the field, or at some point remote from the point of fabrication of the sections, by welding a plurality of prestressed inserts to the adjacent sections, with the inserts being of gradually increasing widths from the inner layers outwardly and with the welds for each insert being for only a single layer to obtain maximum weld strength.
Inventors
- 👤 E Clay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:26
CPC Classifications
F; F16; F16J; F16J12/00; B; B21; B21C; B21C37/00; B21C37/06; B21C37/15; B21C37/154; B23; B23K; B23K5/00; B23K5/006
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
118 words
A method of assembling adjacent pressure vessel sections, comprising the steps of: fabricating two cylindrical multi-layer pressure vessel sections, each with an end in which the ends of the layers are successively shorter from the inner layer radially outwardly; disposing said ends adjacent to each othEr so as to substantially abut the ends of the inner layers and to provide annular spaces between the ends of each layer of the two sections, which spaces are successively larger from the inner layer radially outwardly; welding the end of the inner layers of said sections to each other; and successively positioning and welding at least two arcuate inserts in each of the annular spaces between the layers of the sections.
Claim 2
Independent Claim
118 words
A method of assembling adjacent pressure vessel sections, comprising the steps of: fabricating two cylindrical multi-layer pressure vessel sections, each with an end in which the ends of the layers are successively shorter from the inner layer radially outwardly; disposing said ends adjacent to each othEr so as to substantially abut the ends of the inner layers and to provide annular spaces between the ends of each layer of the two sections, which spaces are successively larger from the inner layer radially outwardly; welding the end of the inner layers of said sections to each other; and successively positioning and welding at least two arcuate inserts in each of the annular spaces between the layers of the sections.
Claim 3
Dependent Claim
32 words
The method set forth in claim 1, including the steps of: applying a prestress pressure to the arcuate inserts in each layer prior to welding same to said ends of said sections.
Claim 4
Dependent Claim
36 words
The method set forth in claim 1, including: prestressing the layers of each of said pressure vessel sections during fabrication thereof and prior to disposing same adjacent to each other for joining the layers thereof together.
Claim 5
Dependent Claim
58 words
The method set forth in claim 1, including: prestressing the layers of each of said pressure vessel sections during fabrication thereof and prior to disposing same adjacent to each other for joining the layers thereof together; and applying a prestress pressure to the arcuate inserts in each layer prior to welding same to said ends of said sections.
Claim 6
Dependent Claim
30 words
The method set forth in claim 1, wherein: said welding for said inserts extends annularly at the sides of the inserts for each of the layers of the vessel sections.
Claim 7
Dependent Claim
45 words
The method set forth in claim 1, wherein: said welding for said inserts extends annularly at the sides of the inserts for each of the layers of the vessel sections; and each weld is only as thick as each layer of each of said sections.
Claim 8
Dependent Claim
32 words
The method set forth in claim 6, wherein: each of said welds at the different layers of said sections is longitudinally offset from the welds in the other layers of said sections.
References Cited (Backward Citations)
US22251A
Cited
US2050326A
Cited
US2365696A
Cited
US2365697A
Cited
US2372723A
Cited
US2359446A
Cited
US3105808A
Cited
US3306642A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |