US3781966A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of explosively expanding sleeves in eroded tubes
Assignee: Whittaker Corp
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Filing: 1972-12-04
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Granted: 1974-01-01
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Expires: 1992-12-04
Abstract
Abstract The method comprises explosively expanding a first metallic sleeve into engagement with a severely eroded section of a tube and thereafter explosively expanding a second metallic sleeve of approximately the same diameter as the first sleeve into engagement with the first sleeve to cover cracks formed in the first sleeve due to excessive expansion of portions of the first sleeve resulting from the erosion-produced, tapering of the inner wall of the tube.
Inventors
- 👤 I Lieberman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:04
CPC Classifications
B; B21; B21D; B21D39/00; B21D39/04; B21D39/042; B21D26/00; B21D26/02; B21D26/06; B21D26/08; Y; Y10; Y10S; Y10S138/00; Y10S138/06; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0402; Y10T137/0441; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49352; Y10T29/49393; Y10T29/49718; Y10T29/49732; Y10T29/49805; Y10T29/49806
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
140 words
A method of providing a tube with a liner wherein said tube has a highly eroded, internally-tapered section, said method comprising the steps of: inserting a first metal sleeve into said tube so that said first sleeve is substantially co-extensive with both said eroded section and an adjacent section of said tube having a nominal internal diameter, said first sleeve being explosively expandable against said adjacent section of said tube; explosively expanding said first sleeve into engagement with said tube; inserting a second metal sleeve within said first sleeve, said second sleeve characterized by being explosively expandable into engagement with said section of said tube having said nominal diameter and having a length substantially as long as is permitted by the bore defined by said expanded first sleeve; aNd explosively expanding said second sleeve into engagement with said first sleeve.
Claim 2
Independent Claim
140 words
A method of providing a tube with a liner wherein said tube has a highly eroded, internally-tapered section, said method comprising the steps of: inserting a first metal sleeve into said tube so that said first sleeve is substantially co-extensive with both said eroded section and an adjacent section of said tube having a nominal internal diameter, said first sleeve being explosively expandable against said adjacent section of said tube; explosively expanding said first sleeve into engagement with said tube; inserting a second metal sleeve within said first sleeve, said second sleeve characterized by being explosively expandable into engagement with said section of said tube having said nominal diameter and having a length substantially as long as is permitted by the bore defined by said expanded first sleeve; aNd explosively expanding said second sleeve into engagement with said first sleeve.
Claim 3
Dependent Claim
21 words
The method of claim 1 wherein said second sleeve has an outer diameter substantially equal to that of said first sleeve.
Claim 4
Dependent Claim
27 words
The method of claim 1 wherein the outer diameter of said first sleeve is substantially equal to but less than said nominal internal diameter of said tube.
Claim 5
Dependent Claim
48 words
The method of claim 1 wherein the innermost ends of said first and second sleeves are provided with an external taper which reverses upon expansion of said inserts to provide a more continuous surface transition from said expanded second sleeve to said expanded first sleeve to said tube.
Claim 6
Dependent Claim
62 words
The method of claim 1 wherein said second sleeve is expanded beyond its yield point and wherein a third sleeve is explosively expanded into engagement with said second sleeve, said third sleeve having an outer diameter substantially equal to that of said first and second sleeves and having a length as long as that which is receivable by said expanded second sleeve.
Claim 7
Dependent Claim
12 words
The method of claim 1 wherein said sleeves comprise an erosion-resistant metal.
Claim 8
Dependent Claim
22 words
The method of claim 1 wherein said second sleeve is force-fitted into said expanded first sleeve prior to expanding said second sleeve.
Claim 9
Independent Claim
149 words
A method of providing a tube with a liner wherein said tube has a highly-eroded, internally-tapered section, said method comprising: inserting a first erosion-resistant metal sleeve into said tube, said sleeve being coextensive with said eroded section and with an adjacent section having a nominal diameter and having an outer diameter substantially equal to but less than said nominal diameter of said tube; explosively expanding said sleeve into engagement with said tube to fracture said first sleeve adjacent to its end of greatest expansion; force-fitting an end of a second erosion-resistant, metal sleeve into said expanded first sleeve, said second sleeve having a diameter and thickness substantially equal to those of said first sleeve and having a length extending from the region of said force fit substantially to said end of greatest expansion of said first sleeve; and explosively expanding said second sleeve into engagement with said first sleeve.
Claim 10
Independent Claim
149 words
A method of providing a tube with a liner wherein said tube has a highly-eroded, internally-tapered section, said method comprising: inserting a first erosion-resistant metal sleeve into said tube, said sleeve being coextensive with said eroded section and with an adjacent section having a nominal diameter and having an outer diameter substantially equal to but less than said nominal diameter of said tube; explosively expanding said sleeve into engagement with said tube to fracture said first sleeve adjacent to its end of greatest expansion; force-fitting an end of a second erosion-resistant, metal sleeve into said expanded first sleeve, said second sleeve having a diameter and thickness substantially equal to those of said first sleeve and having a length extending from the region of said force fit substantially to said end of greatest expansion of said first sleeve; and explosively expanding said second sleeve into engagement with said first sleeve.
Claim 11
Dependent Claim
16 words
The method of claim 8 wherein said force-fitted end of said second sleeve is externally tapered.
Claim 12
Dependent Claim
24 words
The method of claim 8 wherein the innermost end of said first sleeve and said force-fitted end of said second sleeve are externally tapered.
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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) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |