US4297779A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of joining structural elements
Assignee: BBC Brown Boveri AG Switzerland
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Filing: 1979-08-10
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Granted: 1981-11-03
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Expires: 1999-08-10
Abstract
Abstract A process for the manufacture of a solid gas and vacuum tight join between components of different physical properties using a joining element comprising a memory alloy whose memory effect gives rise to the necessary contraction or dilatation stress, in particular for the connection of a hollow body of ceramic material to a metallic object. Joins comprising a memory alloy joining element result from such process having a groove and steps and at least one further metallic or non-metallic component, in particular a hollow body.
Inventors
- 👤 Keith Melton
- 👤 Olivier Mercier
- 👤 Peter Taiana
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:21
CPC Classifications
F; F16; F16L; F16L13/00; F16L13/007; F16L13/004; F16L55/00; F16L55/10; F16B; F16B2200/00; F16B2200/77; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T403/00; Y10T403/48
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
98 words
A process for the manufacture of a solid and tight join between components using first and second joining elements which comprises: forming at least one annular dove-tail groove in said first joining element, said first joining element comprising a heat releasable, metallic, shape memory effect alloy; pressing said second joining element into said at least one annular groove of said first joining element; and shrinking by heating said first joining element so as to form said solid and tight join due to shape memory effect of said at least one groove of said metallic, shape memory effect alloy.
Claim 2
Dependent Claim
98 words
A process for the manufacture of a solid and tight join between components using first and second joining elements which comprises: forming at least one annular dove-tail groove in said first joining element, said first joining element comprising a heat releasable, metallic, shape memory effect alloy; pressing said second joining element into said at least one annular groove of said first joining element; and shrinking by heating said first joining element so as to form said solid and tight join due to shape memory effect of said at least one groove of said metallic, shape memory effect alloy.
Claim 3
Dependent Claim
16 words
A process according to claim 1 wherein said alloy comprises Cu, Zn, Al and nickel additions.
Claim 4
Dependent Claim
14 words
A process according to claim 1 wherein said alloy comprises Ti, Ni, and Cu.
Claim 5
Dependent Claim
21 words
A process according to claim 1 wherein said alloy comprises 2% Ni, 6% Al, 20.5% to 22% Zn and balance Cu.
Claim 6
Dependent Claim
18 words
A process according to claim 1 wherein each of said first and second joining elements comprise metallic alloys.
Claim 7
Dependent Claim
13 words
A process according to claim 1 wherein said second joining element comprises plastic.
Claim 8
Dependent Claim
15 words
A process according to claim 1 wherein said second joining element comprises a ceramic material.
Claim 9
Dependent Claim
22 words
A process according to claim 1, wherein said step of forming further comprises forming a circular groove in said first joining element.
Claim 10
Dependent Claim
40 words
A process according to claim 1, said first joining element comprising a disc made from a full plate member, wherein said forming further comprises forming at least one circular groove in at least one end face of said plate member.
Claim 11
Dependent Claim
37 words
A process according to claim 1, said first joining element comprising a disc made from a thin-walled sheet, wherein said forming further comprises forming a circular groove in at least one end face of said thin-walled sheet.
Claim 12
Dependent Claim
53 words
A process according to claim 2 or 6 or 7, wherein said forming at least one groove comprises forming at least one groove such that the radial width of said at least one groove is undersized with respect to said second joining element by at least 2% and by a maximum of 8%.
Claim 13
Dependent Claim
23 words
A process according to claim 2 or 7 wherein said first and second joining elements are centro-symmetric and are rectangular in cross section.
Claim 14
Dependent Claim
22 words
A process according to claim 2 or 7 wherein said first and second joining elements are centro-symmetric and are hexagonal cross sections.
Claim 15
Dependent Claim
23 words
A process according to claim 2 or 7 wherein said first and second joining elements are centro-symmetric and are octangonal in cross section.
Claim 16
Dependent Claim
22 words
A process according to claim 2 or 7 wherein said first and second joining elements are centro-symmetric and are circular cross sections.
Claim 17
Dependent Claim
25 words
A process according to claim 1 wherein said first joining element comprises a sleeve member and said second joining element comprises a ceramic rod member.
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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) | 1984-11-02 | 1985-05-04 | 1985-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-02 | 1989-05-04 | 1989-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-02 | 1993-05-04 | 1993-11-03 | $7700.00 | Window Closed / Lapsed |