US4072787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminated wall tubing
Assignee: United States Department of the Army
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Filing: 1977-01-03
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Granted: 1978-02-07
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Expires: 1997-01-03
Abstract
Abstract A large diameter rocket launch tube comprised of a pair of thin sheets wh are rolled and positioned in concentric relation with the seams disposed in spaced (180°) relation. A pair of reinforcing weld strips are positioned inside the tube adjacent the seams, and a second pair of reinforcing strips are positioned inside the tube intermediate the first pair of strips. A bonding agent is spread on the inner tube and the tubes are assembled and spot welded prior to having the adhesive cured.
Inventors
- 👤 Earl C. Ricks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:58
CPC Classifications
B; B23; B23K; B23K11/00; B23K11/16; B23K11/163; B23K11/10; B23K11/105; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12347; Y10T428/12493; Y10T428/12639; Y10T428/13
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
90 words
A laminated tubular structure comprising: a. first and second sheet members rolled in tubular concentric relation and positioned so that the seam of each rolled sheet is spaced 180° apart; b. bonding means disposed between said sheets; and c. reinforcing strips positioned in said second member, a first pair of reinforcing strips disposed adjacent said seams, a second pair of said reinforcing strips being spaced 90° from said first pair of reinforcing strips, said reinforcing strips and said sheet member being resistance welded along the length of said tubular structure.
Claim 2
Dependent Claim
90 words
A laminated tubular structure comprising: a. first and second sheet members rolled in tubular concentric relation and positioned so that the seam of each rolled sheet is spaced 180° apart; b. bonding means disposed between said sheets; and c. reinforcing strips positioned in said second member, a first pair of reinforcing strips disposed adjacent said seams, a second pair of said reinforcing strips being spaced 90° from said first pair of reinforcing strips, said reinforcing strips and said sheet member being resistance welded along the length of said tubular structure.
Claim 3
Independent Claim
99 words
A method of fabricating a tubular structure from a pair of flat members including the steps of: a. applying a bonding agent on adjacent surfaces of said sheets; b. rolling and positioning said members in concentric relation with the seams of said members being spaced 180° apart; c. positioning reinforcing members along the inside surface of the inner said flat member; d. clamping said rolled flat members and said reinforcing members about a mandrel; e. progressively moving the tubular structure off the mandrel while resistance welding the tubular structure along the length thereof; and, f. curing said bonding agent.
Claim 4
Independent Claim
99 words
A method of fabricating a tubular structure from a pair of flat members including the steps of: a. applying a bonding agent on adjacent surfaces of said sheets; b. rolling and positioning said members in concentric relation with the seams of said members being spaced 180° apart; c. positioning reinforcing members along the inside surface of the inner said flat member; d. clamping said rolled flat members and said reinforcing members about a mandrel; e. progressively moving the tubular structure off the mandrel while resistance welding the tubular structure along the length thereof; and, f. curing said bonding agent.
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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) | 1981-02-06 | 1981-08-08 | 1982-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-06 | 1985-08-08 | 1986-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-06 | 1989-08-08 | 1990-02-07 | $7700.00 | Window Closed / Lapsed |