US4146165A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for joining by brazing-diffusion
Assignee: Safran Aircraft Engines SAS
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Filing: 1977-11-07
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Granted: 1979-03-27
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Expires: 1997-11-07
Abstract
Abstract A procedure for joining parts by brazing-diffusion by Effecting a primary machining on the parts to be assembled in order to prde reservoirs for filling metal, Arranging a strip between the parts or deposit a coating on one of the parts, Filling the filling metal reservoir with a metal powder, Holding the parts together and providing pressure on the surfaces to be joined by means of screws or the equivalent, Placing the assembly within an enclosure containing a controlled atmosphere which is heated to cause, first, the filling metal to flow and, second, diffusion to take place, then Performing a secondary machining to eliminate the retaining screws and if possible the reservoirs.
Inventors
- 👤 Jacques Lesgourgues
- 👤 Bernard A. Blanchet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:42
CPC Classifications
B; B23; B23K; B23K1/00; B23K1/19; B23K20/00; B23K20/16
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
75 words
A process for joining parts by brazing-diffusion, comprising the steps of: forming reservoirs in a face of at least one part to be joined; filling said reservoirs with brazing metal; securing said parts together, with retaining screws, with said face of said one part abutting the other part; heating said parts in a controlled atmosphere to cause said brazing metal to flow and diffuse; and thereafter machining said reservoirs and retaining screws from said parts.
Claim 2
Dependent Claim
75 words
A process for joining parts by brazing-diffusion, comprising the steps of: forming reservoirs in a face of at least one part to be joined; filling said reservoirs with brazing metal; securing said parts together, with retaining screws, with said face of said one part abutting the other part; heating said parts in a controlled atmosphere to cause said brazing metal to flow and diffuse; and thereafter machining said reservoirs and retaining screws from said parts.
Claim 3
Dependent Claim
23 words
A process as defined in claim 1 wherein said securing step is performed with retaining screws of the same material as said parts.
Claim 4
Dependent Claim
28 words
A process as defined in claim 1 wherein said securing step is performed with retaining screws having a lower coefficient of expansion than the parts to be joined.
References Cited (Backward Citations)
US1470507A
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US2440298A
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US2528280A
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US3871339A
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US3918623A
Cited
US4046305A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-03-26 | 1982-09-25 | 1983-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-26 | 1986-09-25 | 1987-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-26 | 1990-09-25 | 1991-03-27 | $7700.00 | Window Closed / Lapsed |