US4032059A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method using a soldering alloy for connecting parts of which at least some are made of aluminium
Assignee: Chausson Usines SA
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Filing: 1976-03-26
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Granted: 1977-06-28
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Expires: 1996-03-26
Abstract
Abstract The soldering alloy comprises at least: 65 to 85% lead in weight 12 to 30% cadmium in weight 1 to 6% antimony in weight 0.5 to 1% tin in weight. In a method for soldering metal parts, the parts are submitted to an organic flux on the portions thereof to be connected together, said portions are coated with the above mentioned soldering alloy, then they are heated to the liquidus temperature of the soldering alloy while being held together in contact.
Inventors
- 👤 Alain Edouard Plegat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:29
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/26; B23K35/268
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
84 words
A method of soldering parts of which at least one is made of aluminum or aluminum alloy, comprising the steps of: fluxing the parts to be connected together by means of an organic flux; covering at least said fluxed portions with a soldering alloy comprising 65-85% lead by weight 12-30% cadmium by weight 1-6% antimony by weight 0.5-1% tin by weight; heating said portions up to the liquidus temperature of the soldering alloy while holding said portions together; and cooling down to ambient temperature.
Claim 2
Independent Claim
84 words
A method of soldering parts of which at least one is made of aluminum or aluminum alloy, comprising the steps of: fluxing the parts to be connected together by means of an organic flux; covering at least said fluxed portions with a soldering alloy comprising 65-85% lead by weight 12-30% cadmium by weight 1-6% antimony by weight 0.5-1% tin by weight; heating said portions up to the liquidus temperature of the soldering alloy while holding said portions together; and cooling down to ambient temperature.
Claim 3
Dependent Claim
46 words
A method in accordance with claim 1 wherein said parts to be connected are portions of heat exchangers comprising heat distributors made of aluminum in contact with circulation tubes made of a metal selected from the group consisting of copper, brass, stainless steel and the like.
Claim 4
Dependent Claim
28 words
A method in accordance with claim 1 wherein said soldering alloy further contains additives selected among: bismuth 0.5-5% by weight zinc 0.2-1% by weight silver 0.2-1% by weight
Claim 5
Dependent Claim
45 words
A method in accordance with claim 1 wherein said soldering alloy consists essentially of: Pb 79.7 % by weight Cd 16.7% by weight Sb 2.6% by weight Sn 1% by weight to give an alloy having solidus-liquidus temperatures of respectively 234° C and 242° C.
References Cited (Backward Citations)
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US1452750A
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US1953844A
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US2303194A
Cited
US3744121A
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US3769007A
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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) | 1980-06-27 | 1980-12-27 | 1981-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-27 | 1984-12-27 | 1985-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-27 | 1988-12-27 | 1989-06-28 | $7700.00 | Window Closed / Lapsed |