US4511632A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aluminum alloy clad sheet having excellent high-temperature sagging resistance and thermal conductivity
Assignee: MA Aluminum Corp
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Filing: 1982-07-19
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Granted: 1985-04-16
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Expires: 2002-07-19
Abstract
Abstract A clad sheet comprising an aluminum alloy sheet having excellent high-temperature sagging resistance and thermal conductivity comprising an aluminum alloy sheet clad on at least one surface with a brazing metal, said aluminum alloy sheet consists essentially of: manganese: from 0.1 to 0.5 wt. %, silicon: from 0.1 to 0.8 wt. %, zirconium: from 0.02 to 0.2 wt. %, and, the balance being aluminum and incidental impurities. The clad sheet is particularly adapted to be used as a fin material for tubes of a heat exchanger, said aluminum alloy sheet may also contain chromium within the range of from 0.05 to 0.4 wt. % and/or at least one element selected from the group consisting of: magnesium: from 0.1 to 0.7 wt. %, and, copper: from 0.1 to 0.7 wt. %, total amount of said magnesium and said copper being up to 1.0 wt. %.
Inventors
- 👤 Ken Toma
- 👤 Masanao Iida
- 👤 Yo Takeuchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:57
CPC Classifications
F; F28; F28F; F28F19/00; F28F19/02; F28F19/06; B; B32; B32B; B32B15/00; B32B15/01; B32B15/016; B23; B23K; B23K35/00; B23K35/02; B23K35/0222; B23K35/0233; B23K35/0238; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12736; Y10T428/12764
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
90 words
A clad sheet comprising (i) an aluminum alloy sheet having excellent high-temperature sagging resistance and thermal conductivity and (ii) at least one brazing metal film clad on at least one surface of said aluminum alloy sheet; said aluminum alloy sheet consisting essentially of: manganese: from 0.1 to 0.5 wt.%, silicon: from 0.1 to 0.8 wt.%, zirconium: from 0.02 to 0.2 wt.%, and, the balance being aluminum and incidental impurities; said aluminum alloy clad sheet being particularly adapted to be used as a fin material for tubes of a heat exchanger.
Claim 2
Dependent Claim
90 words
A clad sheet comprising (i) an aluminum alloy sheet having excellent high-temperature sagging resistance and thermal conductivity and (ii) at least one brazing metal film clad on at least one surface of said aluminum alloy sheet; said aluminum alloy sheet consisting essentially of: manganese: from 0.1 to 0.5 wt.%, silicon: from 0.1 to 0.8 wt.%, zirconium: from 0.02 to 0.2 wt.%, and, the balance being aluminum and incidental impurities; said aluminum alloy clad sheet being particularly adapted to be used as a fin material for tubes of a heat exchanger.
Claim 3
Dependent Claim
24 words
The clad sheet of claim 1, wherein said aluminum alloy sheet as claimed in claim 1, also contains from 0.05 to 0.4 wt.% chromium.
Claim 4
Dependent Claim
52 words
The clad sheet of claims 1 or 2, wherein said aluminum alloy sheet also contains at least one element selected from the group consisting of: magnesium: from 0.1 to 0.7 wt.%, and, copper: from 0.1 to 0.7 wt.%, the total amount of said magnesium and said copper being up to 1.0 wt.%.
Claim 5
Dependent Claim
16 words
The clad sheet of claim 3, wherein said aluminum alloy sheet contains both magnesium and copper.
Claim 6
Dependent Claim
41 words
The clad sheet of claims 1 or 2, wherein said aluminum alloy sheet contains manganese in an amount between 0.15 and 0.5 weight percent; silicon in an amount between 0.24 and 0.57%; and zirconium in an amount between 0.05 and 0.18%.
Claim 7
Dependent Claim
47 words
The clad sheet of claim 1, wherein said aluminum alloy sheet contains manganese in an amount between 0.15 and 0.5 weight percent; silicon in an amount between 0.24 and 0.57%; zirconium in an amount between 0.05 and 0.18%; and chromium in an amount from 0.12 to 0.25%.
Claim 8
Dependent Claim
78 words
The clad sheet of claim 1, wherein said aluminum alloy sheet containing manganese in an amount between 0.15 and 0.5 weight percent; silicon in an amount between 0.24 and 0.57%; zirconium in an amount between 0.05 and 0.18%; chromium in an amount from 0.12 to 0.25%; and up to 1% of at least one element selected from the group consisting of mangesium in an amount from 0.16 to 0.66% and copper in an amount from 0.15% to 0.65%.
Claim 9
Dependent Claim
15 words
The clad sheet of claim 7, wherein said aluminum alloy sheet contains magnesium and copper.
References Cited (Backward Citations)
US4072542A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-04-15 | 1988-10-15 | 1989-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-15 | 1992-10-15 | 1993-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-15 | 1996-10-15 | 1997-04-16 | $7700.00 | Window Closed / Lapsed |