US3576065A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Repair of apertured machine components
Assignee: Chromalloy American Corp
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Filing: 1969-03-24
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Granted: 1971-04-27
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Expires: 1989-03-24
Abstract
Abstract Machine parts subject to heating in service, particularly hollow engine nozzle guide vanes apertured for internal cooling, are repaired to close cracks that develop at the aperture locations be inserting into the apertures tubes of siliceous composition, closing the cracks by welding about the inserts, and removing the inserts from the apertures to restore them to normal openness without necessitating expensive machining operations for restoration of the part.
Inventors
- 👤 Lorne L Frazier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:36
CPC Classifications
B; B23; B23P; B23P6/00; B23P6/002; B23P6/007; B23K; B23K9/00; B23K9/0026; F; F01; F01D; F01D5/00; F01D5/005; F01D5/12; F01D5/14; F01D5/18; B23P2700/00; B23P2700/06; Y; Y02; Y02T; Y02T50/00; Y02T50/60; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49316; Y10T29/49318; Y10T29/49718; Y10T29/49746; Y10T29/4981; Y10T29/4998; Y10T29/49993
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
52 words
The method of repairing an apertured hollow metallic machine part subject to heating in use and having a cracked condition at the part aperture, that includes confining a high temperature resistant insert in the aperture, closing the crack by welding about the aperture and insert, and removing the insert from the aperture.
Claim 2
Independent Claim
52 words
The method of repairing an apertured hollow metallic machine part subject to heating in use and having a cracked condition at the part aperture, that includes confining a high temperature resistant insert in the aperture, closing the crack by welding about the aperture and insert, and removing the insert from the aperture.
Claim 3
Dependent Claim
13 words
The method of claim 1, in which said insert is of siliceous material.
Claim 4
Dependent Claim
12 words
The method of claim 1, in which said insert is fused quartz.
Claim 5
Dependent Claim
14 words
The method of claim 1 in which said insert is open tubular fused quartz.
Claim 6
Dependent Claim
17 words
The method of claim 1 in which said insert is removed by dissolution in molten caustic soda.
Claim 7
Dependent Claim
16 words
The method of claim 1 in which said insert is removed by drilling into the aperture.
Claim 8
Dependent Claim
38 words
The method of claim 1, in which said part is a hollow nozzle guide vane having a series of small apertures for internal cooling of the vane, said cracked condition being at one or more of the apertures.
Claim 9
Dependent Claim
18 words
The method of claim 7, in which the aperture diameter is in the order of about 0.050 inch.
Claim 10
Dependent Claim
17 words
The method of claim 7, in which siliceous inserts are confined in selected apertures where cracking occurs.
Claim 11
Dependent Claim
26 words
The method of claim 7, in which the insert is tubular fused quartz and is removed by immersion of the vane in hot molten caustic soda.
Claim 12
Dependent Claim
21 words
The method of claim 7, in which the insert is tubular fused quartz and is removed by drilling into the aperture.
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) | 1974-04-26 | 1974-10-26 | 1975-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-26 | 1978-10-26 | 1979-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-26 | 1982-10-26 | 1983-04-27 | $7700.00 | Window Closed / Lapsed |