Patent US3766633A successfully refreshed from Google Patents.
US3766633A
Expired / Lapsed
US
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Method of joining metals of different melting points
Assignee: Forschungszentrum Jülich
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Filing: 1971-12-08
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Granted: 1973-10-23
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Expires: 1991-12-08
Abstract
Abstract A system for joining metals of different melting points, in which the high-melting-point metal is provided with a formfitting formation including a recess overhung by the formation and is pressed into the low-melting-point metal, both bodies being heated in vacuo at a temperature in which the low-meltingpoint metal is at least softened or made pasty so that its metal flows into the recess or around the formation. The heating is maintained until a diffusion welding zone is formed between the two bodies.
Inventors
- 👤 W Lehrheuer
- 👤 R Lison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:04
CPC Classifications
B; B23; B23K; B23K33/00; B23K33/004; B23K33/006; B23K20/00; B23K20/22; B23K20/227; B23K20/2275
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
This method defined in claim 1 wherein said second body has a frustoconical face interfitting axially with said taperiing face and forming a diffusion zone, said teeth being annular and including a recess and a head overlying said recess in the axial direction.
Claim 2
Dependent Claim
27 words
The method defined in claim 1 wherein said first body is composed of stainless steel and said second body is composed of aluminum or an aluminum alloy.
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) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |