US4175311A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Joints
Assignee: Hydra Tight Ltd
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Filing: 1977-06-15
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Granted: 1979-11-27
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Expires: 1997-06-15
Abstract
Abstract A method of forming a joint between a metal structural tubular member and a metal sleeve. The method comprises placing the sleeve around a part of the tubular member so that there is a space between the sleeve and the adjacent part of the tubular member, closing the ends of at least a part of the space between the tubular member and the sleeve, injecting a hardenable composition into the space between the closed ends and maintaining the pressure until set. The method can be used for joining together structural tubular members or for repairing a damaged structural member.
Inventors
- 👤 Thomas W. Bunyan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:47
CPC Classifications
F; F16; F16B; F16B7/00; F16B11/00; F16B11/006; F16B11/008; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49718; Y10T29/49746; Y10T29/49748; Y10T29/49826; Y10T29/49879; Y10T29/53; Y10T29/53657; Y10T29/5367
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
113 words
A method of repairing a damaged structural tubular member including the steps of providing a sleeve which is divided longitudinally and has cylindrical end portions and an enlarged central portion, placing the said divided sleeve around said structural tubular member with said enlarged portion around said damaged part, so that there is a space between each cylindrical end portion of the sleeve and the adjacent part of the tubular member, closing the ends of at least the said spaces between the cylindrical end portions and the tubular member, injecting a hardenable composition through the wall of the sleeve into the space between the closed ends, and maintaining the composition under pressure until set.
Claim 2
Independent Claim
113 words
A method of repairing a damaged structural tubular member including the steps of providing a sleeve which is divided longitudinally and has cylindrical end portions and an enlarged central portion, placing the said divided sleeve around said structural tubular member with said enlarged portion around said damaged part, so that there is a space between each cylindrical end portion of the sleeve and the adjacent part of the tubular member, closing the ends of at least the said spaces between the cylindrical end portions and the tubular member, injecting a hardenable composition through the wall of the sleeve into the space between the closed ends, and maintaining the composition under pressure until set.
Claim 3
Dependent Claim
17 words
A method according to claim 1 in which the composition is a high friction epoxy resin composition.
Claim 4
Dependent Claim
15 words
A method according to claim 2 in which the epoxy resin composition includes carborundum powder.
Claim 5
Dependent Claim
33 words
A method according to claim 1 in which the two parts of the sleeve have bolting flanges along their longitudinal edges and including the step of securing the bolting flanges together with bolts.
Claim 6
Dependent Claim
27 words
A method according to claim 1 in which the space between the central portion and the tubular member is filled with a material of high crushing strength.
Claim 7
Dependent Claim
13 words
A method according to claim 5 in which the said material is cement.
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) | 1982-11-26 | 1983-05-28 | 1983-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-11-26 | 1987-05-28 | 1987-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-11-26 | 1991-05-28 | 1991-11-27 | $7700.00 | Window Closed / Lapsed |