US4190106A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optimized cooler dewar
Assignee: United States Department of the Army
•
Filing: 1976-03-18
•
Granted: 1980-02-26
•
Expires: 1996-03-18
Abstract
Abstract The invention provides an elastic interface between a cooler dewar and an electronic cold finger which utilizes multitudinous conduction paths consisting of specialized bent fibers.
Inventors
- 👤 Howard L. Dunmire
- 👤 Stuart B. Horn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:49
CPC Classifications
F; F28; F28F; F28F13/00; F25; F25D; F25D19/00; F25D19/006
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
124 words
A cryogenic coupling between a cold finger and a low temperature dewar comprising: a first planar, solid, highly malleable and highly heat conductive transition member pressed into the surface of said dewar; a second highly conductive, thin, rigid, metallic transition member conductively bonded to said cold finger; a third transition member comprising a continuous mat of highly heat conductive resilient interwoven fibers filling the major portion of the space between said first and second transition members, said fibers being sufficiently compressed to make firm contact with one another and being bonded to at least one of said transition members; and a fourth thin rigid highly conductive metallic interface member is conductively bonded to said third transition member between said first and third transition members.
Claim 2
Dependent Claim
124 words
A cryogenic coupling between a cold finger and a low temperature dewar comprising: a first planar, solid, highly malleable and highly heat conductive transition member pressed into the surface of said dewar; a second highly conductive, thin, rigid, metallic transition member conductively bonded to said cold finger; a third transition member comprising a continuous mat of highly heat conductive resilient interwoven fibers filling the major portion of the space between said first and second transition members, said fibers being sufficiently compressed to make firm contact with one another and being bonded to at least one of said transition members; and a fourth thin rigid highly conductive metallic interface member is conductively bonded to said third transition member between said first and third transition members.
Claim 3
Dependent Claim
16 words
A coupling according to claim 1 wherein said fibers are made of berryllium copper spring wire.
Claim 4
Dependent Claim
20 words
A coupling according to claim 1 wherein said fibers are made of an alloy of 97% copper and 3% silver.
Claim 5
Dependent Claim
13 words
A coupling according to claim 1 wherein: said fibers are made of brass.
Claim 6
Dependent Claim
19 words
A coupling according to claim 1 wherein said fibers have a diameter between 0.003 and 0.005 inches in diameter.
Claim 7
Dependent Claim
19 words
A coupling according to claim 1 wherein said third transition member has a thickness between 0.030 and 0.750 inches.
Claim 8
Dependent Claim
15 words
A coupling according to claim 1 wherein said first transition member is made of Indium.
Claim 9
Dependent Claim
15 words
A coupling according to claim 1 wherein said fourth coupling member is made of copper.
References Cited (Backward Citations)
NL36251C
Cited
US2805275A
Cited
US3387148A
Cited
US3405272A
Cited
US3423955A
Cited
US3586102A
Cited
US3609992A
Cited
US3693374A
Cited
US3732421A
Cited
US3807188A
Cited
US3851173A
Cited
US3999403A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-02-25 | 1983-08-27 | 1984-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-25 | 1987-08-27 | 1988-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-25 | 1991-08-27 | 1992-02-26 | $7700.00 | Window Closed / Lapsed |