US3898053A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brazing materials
Assignee: Reynolds Metals Co
•
Filing: 1974-08-05
•
Granted: 1975-08-05
•
Expires: 1994-08-05
Abstract
Abstract An aluminum-silicon brazing composition containing about 0.02 to 0.20% bismuth by weight, with silicon in the range from about 7 to 14% and magnesium in the range from about 0.2 to 2%; preferably employed as a cladding layer on a magnesium-containing aluminum base core alloy.
Inventors
- 👤 Jr Ogle Ridout Singleton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 01:37
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/01; B32B15/016; B23; B23K; B23K35/00; B23K35/001; B23K35/002; B23K35/22; B23K35/24; B23K35/28; B23K35/286; C; C22; C22C; C22C21/00; C22C21/02; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12736; Y10T428/12764
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
144 words
A CLAD COMPOSITE BRAZING SHEET HAVING A CORE AND AN OUTER CLADDING LAYER BONDED TO THE CORE, WHEREIN SAID CLADDING LAYER IS COMPOSED OF A BRAZING CMPOSITION CONSISTING ESSENTIALLY OF ALUMINUM, ABOUT 7 TO 14% SILICON, ABOUT 0.2 TO 2% MAGNESIUM AND ABOUT 0.02 TO 0.20% BISMUTH, BY WEIGHT, WITH MINOR ELEMENTS AND IMPURITIES IN AMOUNTS UP TO ABOUT 1% IRON, 0.2% COPPER, 0.25% MANGANESE, 0.6% EACH IN THE CASE OF ZINC AND TITANIUM, OTHERS NOT EXCEEDING 0.05% EACH AND 0.15% TOTAL, AND SAID CORE IS COMPOSED OF AN ALLOY CONSISTING ESSENTIALLY OF ALUMINUM, ONE OR BOTH OF MAGNESIUM AND MANGANESE IN AMOUNTS UP TO ABOUT 3% MAGNESUM AND UP TO ABOUT 1.5% MANGANESE, BY WEIGHT, WITH MINOR ELEMENTS AND INCIDENTAL IMPURITIES IN AMOUNTS UP TO 0.8% IRON, 0.8% SILICON, 0.4% ZINC, 0.35% CHROMIUM, 0.4% COPPER, 0.1% TITANIUM, OTHERS .05% EACH AND 0.15% TOTAL.
Claim 2
Dependent Claim
144 words
A CLAD COMPOSITE BRAZING SHEET HAVING A CORE AND AN OUTER CLADDING LAYER BONDED TO THE CORE, WHEREIN SAID CLADDING LAYER IS COMPOSED OF A BRAZING CMPOSITION CONSISTING ESSENTIALLY OF ALUMINUM, ABOUT 7 TO 14% SILICON, ABOUT 0.2 TO 2% MAGNESIUM AND ABOUT 0.02 TO 0.20% BISMUTH, BY WEIGHT, WITH MINOR ELEMENTS AND IMPURITIES IN AMOUNTS UP TO ABOUT 1% IRON, 0.2% COPPER, 0.25% MANGANESE, 0.6% EACH IN THE CASE OF ZINC AND TITANIUM, OTHERS NOT EXCEEDING 0.05% EACH AND 0.15% TOTAL, AND SAID CORE IS COMPOSED OF AN ALLOY CONSISTING ESSENTIALLY OF ALUMINUM, ONE OR BOTH OF MAGNESIUM AND MANGANESE IN AMOUNTS UP TO ABOUT 3% MAGNESUM AND UP TO ABOUT 1.5% MANGANESE, BY WEIGHT, WITH MINOR ELEMENTS AND INCIDENTAL IMPURITIES IN AMOUNTS UP TO 0.8% IRON, 0.8% SILICON, 0.4% ZINC, 0.35% CHROMIUM, 0.4% COPPER, 0.1% TITANIUM, OTHERS .05% EACH AND 0.15% TOTAL.
Claim 3
Dependent Claim
15 words
The article of claim 1 wherein said core alloy contains about 0.3 to 0.8% manganese.
Claim 4
Dependent Claim
15 words
The article of claim 1 wherein said core alloy contains about 0.2 to 0.7% iron.
Claim 5
Dependent Claim
15 words
The article of claim 1 wherein said core alloy contains about 0.25 to 0.5% silicon.
Claim 6
Dependent Claim
15 words
The article of claim 1 wherein said core alloy contains about 0.20 to 0.8% magnesium.
Claim 7
Dependent Claim
21 words
The article of claim 1 wherein said core alloy contains approximately 0.3% magnesium and 0.4% each of silicon, iron and mAnganese.
Claim 8
Dependent Claim
13 words
The article of claim 1 wherein said cladding composition contains about 0.3% magnesium.
Claim 9
Dependent Claim
13 words
The article of claim 1 wherein said cladding composition contains about 1.5% magnesium.
Claim 10
Dependent Claim
24 words
The article of claim 1 wherein said cladding composition contains about 0.1% bismuth, about 0.3 to 1.5% magnesium and about 9 to 11% silicon.
References Cited (Backward Citations)
US3811177A
Cited
US3788824A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-04 | 1979-02-03 | 1979-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-04 | 1983-02-03 | 1983-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-04 | 1987-02-03 | 1987-08-05 | $7700.00 | Window Closed / Lapsed |