Patent US5035697A successfully refreshed from Google Patents.
US4881981A
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Method for producing a shape memory alloy member having specific physical and mechanical properties
Assignee: Johnson Controls Inc
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Filing: 1988-04-20
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Granted: 1989-11-21
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Expires: 2008-04-20
Abstract
Abstract A process for adjusting the physical and mechanical properties of a shape memory alloy member of a known chemical composition comprising the steps of increasing the internal stress level and forming said member to a desired configuration and heat treating said member at a selected memory imparting temperature.
Inventors
- 👤 Paul E. Thoma
- 👤 II David N. AbuJodom
- 👤 Sepehr Fariabi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:21
CPC Classifications
C; C22; C22F; C22F1/00; C22F1/006
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
82 words
A process for adjusting the physical and mechanical properties of a shape memory alloy member of a known chemical composition, said process comprising the steps of annealing said member to a reference internal stress level, introducing a controlled amount of internal stress into said member, forming the said member into a desired configuration, fixturing said member in the final desired configuration, the shape said member reverts to upon heating, and heat treating said member to obtain the desired physical and mechanical properties.
Claim 2
Dependent Claim
82 words
A process for adjusting the physical and mechanical properties of a shape memory alloy member of a known chemical composition, said process comprising the steps of annealing said member to a reference internal stress level, introducing a controlled amount of internal stress into said member, forming the said member into a desired configuration, fixturing said member in the final desired configuration, the shape said member reverts to upon heating, and heat treating said member to obtain the desired physical and mechanical properties.
Claim 3
Dependent Claim
24 words
The process according to claim 1 including the step of determining the transformation temperatures of said member for the Austenite, Martensite and Rhombohedral phases.
Claim 4
Dependent Claim
34 words
The process according to claim 2 including the step of generating a family of phase transformation curves by repeating the steps of claim 3 at different internal stress levels and different memory imparting temperatures.
Claim 5
Dependent Claim
21 words
The process according to claim 1 including the step of determining the stress/strain behavior for the Austenite, Martensite and Rhombohedral phases.
Claim 6
Dependent Claim
34 words
The process according to claim 4 including the step of generating a family of stress/strain behavior curves by repeating the steps of claim 5 at different internal stress levels and different memory imparting temperatures.
Claim 7
Dependent Claim
24 words
The process according to claim 1 wherein said introducing step includes the additional step of introducing a progressively variable internal stress into said member.
Claim 8
Dependent Claim
28 words
The process according to claim 1 wherein said introducing step includes the introduction of a variety of different amounts of internal stress into selective portions of said member.
Claim 9
Dependent Claim
74 words
A process for adjusting the physical and mechanical properties of a shape memory alloy member of a known chemical composition and known internal stress level, said process comprising the steps of increasing the internal stress level of said member, and forming said member to a desired configuration, fixturing said member in the final desired configuration, the shape said member reverts to upon heating, and heat treating said member at a selected memory imparting temperature.
Claim 10
Dependent Claim
74 words
A process for adjusting the physical and mechanical properties of a shape memory alloy member of a known chemical composition and known internal stress level, said process comprising the steps of increasing the internal stress level of said member, and forming said member to a desired configuration, fixturing said member in the final desired configuration, the shape said member reverts to upon heating, and heat treating said member at a selected memory imparting temperature.
Claim 11
Dependent Claim
24 words
The process according to claim 8 including the step of determining the transformation temperatures of said member for the Austenite, Martensite and Rhombohedral phases.
Claim 12
Dependent Claim
33 words
The process according to claim 9 including step of generating a family of phase transformation curves by repeating the steps of claim 11 at different internal stress levels and different memory imparting temperatures.
Claim 13
Dependent Claim
21 words
The process according to claim 8 including the step of determining the stress/strain behavior for the Austenite, Martensite and Rhombohedral phases.
Claim 14
Dependent Claim
34 words
The process according to claim 11 including the step of generating a family of stress/strain behavior curves by repeating the steps of claim 13 at different internal stress levels and different memory imparting temperatures.
Claim 15
Dependent Claim
23 words
The process according to claim 8 wherein said increasing step includes the additional step of introducing a progressively variable internal stress into alloy.
Claim 16
Dependent Claim
30 words
The process according to claim 8 wherein the increasing step includes the additional step of introducing a variety of different amounts of internal stress into selected portions of said member.
Claim 17
Dependent Claim
89 words
A process for adjusting the physical and mechanical properties of a shape memory alloy member of a known chemical composition and known internal stress level, said process comprising the steps of annealing said member at a predetermined temperature and time to establish a lower reference internal stress level, increasing the internal stress level of said member, forming said member to a desired configuration, fixturing said member in the desired configuration, the shape said member reverts to upon heating, and heat treating said member at a selected memory imparting temperature.
Claim 18
Dependent Claim
89 words
A process for adjusting the physical and mechanical properties of a shape memory alloy member of a known chemical composition and known internal stress level, said process comprising the steps of annealing said member at a predetermined temperature and time to establish a lower reference internal stress level, increasing the internal stress level of said member, forming said member to a desired configuration, fixturing said member in the desired configuration, the shape said member reverts to upon heating, and heat treating said member at a selected memory imparting temperature.
Claim 19
Dependent Claim
24 words
The process according to claim 15 including the step of determining the transformation temperatures of said member for the Austenite, Martensite and Rhombohedral phases.
Claim 20
Dependent Claim
34 words
The process according to claim 16 including the step of generating a family of phase transformation curves by repeating the steps of claim 19 at different internal stress levels and different memory imparting temperatures.
Claim 21
Dependent Claim
21 words
The process according to claim 15 including the step of determining the stress/strain behavior for the Austenite, Martensite and Rhombohedral phases.
Claim 22
Dependent Claim
33 words
The process according to claim 18 including step of generating a family of stress/strain behavior curves by repeating the steps of claim 21 at different internal stress levels and different memory imparting temperatures.
Claim 23
Dependent Claim
24 words
The process according to claim 15 wherein said increasing step includes the additional step of introducing a progressively variable internal stress into said member.
Claim 24
Dependent Claim
28 words
The process according to claim 15 wherein said increasing step includes the introduction of a variety of different amounts of internal stress into selected portions of said member.
Claim 25
Dependent Claim
57 words
A process for adjusting the physical and mechanical properties of a shape memory alloy member of a known chemical composition, said process comprising the steps of annealing said member to a reference internal stress level, introducing a progessively variable internal stress into said member and heat treating said member to obtain the desired physical and mechanical properties.
Claim 26
Dependent Claim
57 words
A process for adjusting the physical and mechanical properties of a shape memory alloy member of a known chemical composition, said process comprising the steps of annealing said member to a reference internal stress level, introducing a progessively variable internal stress into said member and heat treating said member to obtain the desired physical and mechanical properties.
Claim 27
Dependent Claim
63 words
A process for adjusting the physical and mechanical properties of a shape memory alloy member of a known chemical composition, said process comprising the steps of annealing said member to a reference internal stress level, introducing a variety of different amounts of internal stress into selected portions of said member, and heat treating said member to obtain the desired physical and mechanical properties.
Claim 28
Dependent Claim
63 words
A process for adjusting the physical and mechanical properties of a shape memory alloy member of a known chemical composition, said process comprising the steps of annealing said member to a reference internal stress level, introducing a variety of different amounts of internal stress into selected portions of said member, and heat treating said member to obtain the desired physical and mechanical properties.
Claim 29
Dependent Claim
61 words
A process for adjusting the physical and mechanical properties of a shape memory alloy member of a known chemical composition and known internal stress level, said process comprising the steps of increasing the internal stress level of said member by introducing a progessively variable internal stress into said alloy member, and heat treating said member at a selected memory imparting temperature.
Claim 30
Dependent Claim
61 words
A process for adjusting the physical and mechanical properties of a shape memory alloy member of a known chemical composition and known internal stress level, said process comprising the steps of increasing the internal stress level of said member by introducing a progessively variable internal stress into said alloy member, and heat treating said member at a selected memory imparting temperature.
Claim 31
Dependent Claim
66 words
A process for adjusting the physical and mechanical properties of a shape memory alloy member of a known chemical composition and known internal stress level, said process comprising the steps of increasing the internal stress level of said member by introducing a variety of different amounts of internal stress into selected portions of said member, and heat treating said member at a selected memory imparting temperature.
Claim 32
Dependent Claim
66 words
A process for adjusting the physical and mechanical properties of a shape memory alloy member of a known chemical composition and known internal stress level, said process comprising the steps of increasing the internal stress level of said member by introducing a variety of different amounts of internal stress into selected portions of said member, and heat treating said member at a selected memory imparting temperature.
References Cited (Backward Citations)
US3174851A
Cited
US4310354A
Cited
USPTO Annuity & Maintenance Windows
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| 3.5 Years (Year 4) | 1992-11-20 | 1993-05-22 | 1993-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-20 | 1997-05-22 | 1997-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-20 | 2001-05-22 | 2001-11-21 | $7700.00 | Window Closed / Lapsed |