US4113132A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wire-wrapped cylindrical prestressed structures
Assignee: United States Steel Corp
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Filing: 1976-08-02
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Granted: 1978-09-12
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Expires: 1996-08-02
Abstract
Abstract In the production of wire-wrapped pressure vessels and pipe the ends of the wire are anchored or spliced by welding the end hoop to the next adjoining hoop, while the stresses in those hoops subjected to welding are minimized by providing a greater wire density adjacent thereto and hence reduced tension in the welded hoops.
Inventors
- 👤 John E. Steiner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:29
CPC Classifications
F; F17; F17C; F17C1/00; F17C1/02; F17C1/04; F17C1/06; B; B65; B65H; B65H65/00; B65H81/00; F17C2201/00; F17C2201/01; F17C2201/0104; F17C2201/0109; F17C2203/00; F17C2203/01; F17C2203/011; F17C2203/012; F17C2205/00; F17C2205/03; F17C2205/0388; F17C2205/0394; F17C2205/0397; F17C2260/00; F17C2260/01; F17C2260/011; Y; Y10; Y10S; Y10S228/00; Y10S228/904
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
107 words
A wire reinforced pressure vessel comprising a cylindrical steel vessel and a length of wire wrapped around said cylindrical portion of the vessel such that the wire at the vessel midsection is wrapped with an open pitch and at the ends of said vessel, the wire is wrapped with a thread pitch to provide at least about 3 thread pitch hoops at each end of the cylindrical vessel, the ends of said wire secured in place by welding to the adjacent hoop and that portion of the wire wrapped with an open pitch is stressed to a greater extent than the portion wrapped with a thread pitch.
Claim 2
Dependent Claim
107 words
A wire reinforced pressure vessel comprising a cylindrical steel vessel and a length of wire wrapped around said cylindrical portion of the vessel such that the wire at the vessel midsection is wrapped with an open pitch and at the ends of said vessel, the wire is wrapped with a thread pitch to provide at least about 3 thread pitch hoops at each end of the cylindrical vessel, the ends of said wire secured in place by welding to the adjacent hoop and that portion of the wire wrapped with an open pitch is stressed to a greater extent than the portion wrapped with a thread pitch.
Claim 3
Dependent Claim
20 words
A pressure vessel according to claim 1 in which hemispherical heads are provided at the ends of the cylindrical vessel.
Claim 4
Dependent Claim
52 words
A pressure vessel according to claim 1 in which said wire wrapped with an open pitch is stressed to a limit no greater than about 60% of the wire's ultimate strength, while the wire wrapped with a thread pitch is stressed to a limit well below 60% of the wire's ultimate strength.
Claim 5
Dependent Claim
54 words
A pressure vessel according to claim 3 in which the wire wrapped with a thread pitch is stressed to a limit no greater than about 30% of the wire's ultimate strength, while the two hoops at the extreme ends are stressed to a limit no greater than about 5% of the wire's ultimate strength.
References Cited (Backward Citations)
US586179A
Cited
US2335038A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-09-11 | 1982-03-13 | 1982-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-11 | 1986-03-13 | 1986-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-11 | 1990-03-13 | 1990-09-12 | $7700.00 | Window Closed / Lapsed |