US4694663A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low cost intermediate radiation shield for a magnet cryostat
Assignee: General Electric Co
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Filing: 1986-01-03
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Granted: 1987-09-22
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Expires: 2006-01-03
Abstract
Abstract A radiation shield assembly is provided for a cryostat having a helium vessel and which includes a penetration for cooling the helium vessel. The radiation shield assembly comprises a shield having means for conducting heat toward the cryostat penetration, means for providing an isothermal surface and means for reflecting radiation. The shield surrounds the helium vessel, and is spaced away from the helium vessel by spacer means comprising isolated packets of powder insulation in permeable packages.
Inventors
- 👤 Russell S. Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:43
CPC Classifications
F; F17; F17C; F17C3/00; F17C3/02; F17C3/08; F17C3/085; G; G01; G01R; G01R33/00; G01R33/20; G01R33/28; G01R33/38; G01R33/381; G01R33/3815; F17C2203/00; F17C2203/06; F17C2203/068; F17C2203/0687; F17C2221/00; F17C2221/01; F17C2221/014; F17C2221/016; F17C2221/017; F17C2270/00; F17C2270/05; F17C2270/0509; H; H01; H01F; H01F6/00; H01F6/04; Y; Y10; Y10S; Y10S220/00; Y10S220/901
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
81 words
A radiation shield assembly for a cryostat having an inner helium vessel, said cryostat defining a penetration for cooling the helium vessel, said radiation shield assembly comprising: a flexible shield including means for conducting heat toward the cryostat penetration and providing an isothermal surface, the shield surrounding said helium vessel; spacer means situated between said shield and said helium vessel; and clamping means for holding said flexible shield under tension around said spacer means to prevent said flexible shield from sagging.
Claim 2
Dependent Claim
81 words
A radiation shield assembly for a cryostat having an inner helium vessel, said cryostat defining a penetration for cooling the helium vessel, said radiation shield assembly comprising: a flexible shield including means for conducting heat toward the cryostat penetration and providing an isothermal surface, the shield surrounding said helium vessel; spacer means situated between said shield and said helium vessel; and clamping means for holding said flexible shield under tension around said spacer means to prevent said flexible shield from sagging.
Claim 3
Dependent Claim
31 words
The radiation shield assembly of claim 1 wherein said shield comprises parallel lengths of wire bonded between reflective foil sheets, said parallel lengths arranged to conduct heat toward the cryostat penetration.
Claim 4
Dependent Claim
24 words
The radiation shield assembly of claim 1 wherein said shield comprises a slit sheet mesh of heat conductive material bonded between reflective foil sheets.
Claim 5
Dependent Claim
18 words
The radiation shield assembly of claim 1 wherein said spacer means comprises isolated insulating packets of powdered insulation.
References Cited (Backward Citations)
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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) | 1990-09-21 | 1991-03-23 | 1991-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-09-21 | 1995-03-23 | 1995-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-09-21 | 1999-03-23 | 1999-09-22 | $7700.00 | Window Closed / Lapsed |