Patent US2835253A successfully refreshed from Google Patents.
US4198081A
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US
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Heat recoverable metallic coupling
Assignee: Memry Corp
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Filing: 1977-05-26
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Granted: 1980-04-15
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Expires: 1997-05-26
Abstract
Abstract A coupling for tubes, pipes or the like, fabricated of heat recoverable metal that is treated so that it will contract when heated above its transition temperature spontaneously expand when cooled to its transition temperature to permit it to be installed or removed from the pipes.
Inventors
- 👤 John D. Harrison
- 👤 James E. Jervis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:54
CPC Classifications
F; F16; F16L; F16L13/00; F16L13/004; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/49865
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
123 words
An article comprising a heat recoverable metallic material above its transition temperature, the article having been distorted a sufficient amount that both thermally recoverable and non-thermally recoverable plastic deformation took place, the article being maintained in a heat-unstable configuration by a restraining member in engagement with the article and exerting a restraining force in the direction opposite that of heat recovery of the material, wherein when the temperature of the article is reduced to below the transition temperature of the material, the article will expand in the direction of the restraining force an amount sufficient that the restraining member exerts no restraining force on the article, said expansion including spontaneous expansion occurring even when the restraining member exerts no force on the article.
Claim 2
Dependent Claim
123 words
An article comprising a heat recoverable metallic material above its transition temperature, the article having been distorted a sufficient amount that both thermally recoverable and non-thermally recoverable plastic deformation took place, the article being maintained in a heat-unstable configuration by a restraining member in engagement with the article and exerting a restraining force in the direction opposite that of heat recovery of the material, wherein when the temperature of the article is reduced to below the transition temperature of the material, the article will expand in the direction of the restraining force an amount sufficient that the restraining member exerts no restraining force on the article, said expansion including spontaneous expansion occurring even when the restraining member exerts no force on the article.
Claim 3
Dependent Claim
21 words
The article of claim 1 wherein said metallic material has a transition temperature between about -196° C. and about +75° C.
Claim 4
Dependent Claim
31 words
The article of claim 1 wherein said metallic material is an alloy consisting essentially of about 50 atomic percent titanium, about 47 atomic percent nickel and about 3 atomic percent iron.
Claim 5
Dependent Claim
42 words
The arcticle of claim 1 wherein said metallic material is an alloy consisting essentially of about 50 atomic percent nickel, about 0.75 atomic percent to about 1.0 atomic percent aluminum and correspondingly about 49.25 atomic percent to about 49 atomic percent titanium.
Claim 6
Dependent Claim
26 words
The article of claim 1 wherein said metallic material is an alloy consisting essentially of about 51.5 atomic percent nickel and about 48.5 atomic percent titanium.
Claim 7
Dependent Claim
30 words
The article of claim 1 wherein said metallic material is an alloy consisting essentially of about 2 atomic percent manganese, about 48 percent nickel and about 50 atomic percent titanium.
Claim 8
Dependent Claim
18 words
The article of claim 1 wherein the article has been distorted at a temperature below its transition temperature.
Claim 9
Dependent Claim
18 words
The article of claim 1 wherein the article has been distorted at a temperature above its transition temperature.
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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) | 1983-04-15 | 1983-10-15 | 1984-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-15 | 1987-10-15 | 1988-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-15 | 1991-10-15 | 1992-04-15 | $7700.00 | Window Closed / Lapsed |