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US4274872A
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Brazable shape memory alloys
Assignee: BBC Brown Boveri AG Switzerland
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Filing: 1979-06-25
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Granted: 1981-06-23
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Expires: 1999-06-25
Abstract
Abstract A brazable shape memory alloy of the β-brass type comprising a mixture of copper, zinc and aluminum and nickel in an amount effective to inhibit grain growth and a process of brazing therewith.
Inventors
- 👤 Keith Melton
- 👤 Olivier Mercier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:34
CPC Classifications
C; C22; C22C; C22C9/00; C22C9/04; C22F; C22F1/00; C22F1/006
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
76 words
A brazable shape memory alloy of the β-brass type comprising a mixture of copper, zinc, aluminum and nickel wherein said alloy comprises about 0.5 to about 4 wt. % nickel, 6 to 15 wt. % aluminum, 1 to 25 wt. % zinc and 65 to 85 wt. % copper; and wherein the total amount of aluminum and zinc is greater than or equal to 15 wt. % and less than or equal to 31 wt. %.
Claim 2
Dependent Claim
76 words
A brazable shape memory alloy of the β-brass type comprising a mixture of copper, zinc, aluminum and nickel wherein said alloy comprises about 0.5 to about 4 wt. % nickel, 6 to 15 wt. % aluminum, 1 to 25 wt. % zinc and 65 to 85 wt. % copper; and wherein the total amount of aluminum and zinc is greater than or equal to 15 wt. % and less than or equal to 31 wt. %.
Claim 3
Dependent Claim
35 words
The brazable shape memory alloy of claim 1, wherein said alloy comprises about 0.5 wt.% to about 4 wt.% nickel, 7 to 9 wt.% aluminum, 12 to 18 wt.% zinc, and copper as the balance.
References Cited (Backward Citations)
US3783037A
Cited
US3816187A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-06-22 | 1984-12-22 | 1985-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-22 | 1988-12-22 | 1989-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-22 | 1992-12-22 | 1993-06-23 | $7700.00 | Window Closed / Lapsed |