Patent US4837541A successfully refreshed from Google Patents.
US4837541A
Expired / Lapsed
US
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Shield suspension system for a magnetic resonance cryostat
Assignee: General Electric Co
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Filing: 1987-09-16
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Granted: 1989-06-06
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Expires: 2007-09-16
Abstract
Abstract A cryostat for a magnetic resonance magnet is provided comprising a cylindrical helium vessel concentrically situated in the cryostat. A first cylindrical shield is situated in the cryostat surrounding the first shield. A plurality of tubular struts are affixed to both the helium vessel circular end faces and the second shield. The tubular struts are circumferentially spaced and extend radially, parallel to the end shields of the helium vessel. The struts support the second shield spaced away from the helium vessel. Plate means are circumferentially spaced about the circular end faces of the first shield and affixed thereto. The plates extend radially, parallel to the end faces of the first shield and affixed to the inner circular end faces of the second shield, supporting the first shield spaced away from the second shield.
Inventors
- 👤 Richard E. Pelc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:51
CPC Classifications
H; H01; H01F; H01F6/00; H01F6/04; F; F17; F17C; F17C13/00; F17C13/08; F17C13/086; F17C13/087; F17C3/00; F17C3/02; F17C3/08; F17C3/085; G; G01; G01R; G01R33/00; G01R33/20; G01R33/28; G01R33/38; G01R33/381; G01R33/3815; F17C2201/00; F17C2201/01; F17C2201/0104; F17C2203/00; F17C2203/06; F17C2203/068; F17C2203/0687; F17C2221/00; F17C2221/01; F17C2221/016; F17C2221/017; F17C2223/00; F17C2223/01; F17C2223/0146; F17C2223/0153; F17C2223/0161; F17C2270/00; F17C2270/05; F17C2270/0527; F17C2270/0536; F25; F25D; F25D19/00; F25D19/006
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
151 words
A cryostat for a magnetic resonance magnet comprising: a cylindrical helium vessel concentrically situated in the cryostat; a first cylindrical shield situated in the cryostat surrounding said helium vessel; a second cylindrical shield situated in the cryostat surrounding said first shield; a plurality of tubular struts affixed to both of said helium vessel circular and faces and said second shield, said tubular struts circumferentially spaced and extending radially, parallel to said end shields of the helium vessel, to said second shield, said struts supporting said second shield spaced away from said helium vessel; and plate means circumferentially spaced about the outside of each of the circular end faces of said first shield and affixed thereto, said plate means extending radially, parallel to the end faces of said first shield and affixed to the inner circular end faces of said second shield, supporting said first shield spaced away from the second shield.
Claim 2
Dependent Claim
151 words
A cryostat for a magnetic resonance magnet comprising: a cylindrical helium vessel concentrically situated in the cryostat; a first cylindrical shield situated in the cryostat surrounding said helium vessel; a second cylindrical shield situated in the cryostat surrounding said first shield; a plurality of tubular struts affixed to both of said helium vessel circular and faces and said second shield, said tubular struts circumferentially spaced and extending radially, parallel to said end shields of the helium vessel, to said second shield, said struts supporting said second shield spaced away from said helium vessel; and plate means circumferentially spaced about the outside of each of the circular end faces of said first shield and affixed thereto, said plate means extending radially, parallel to the end faces of said first shield and affixed to the inner circular end faces of said second shield, supporting said first shield spaced away from the second shield.
Claim 3
Dependent Claim
155 words
A cryostat for a magnetic resonance magnet comprising: a cylindrical inner vessel surrounding the magnet windings concentrically situated in the cryostat; a first cylindrical shield situated in the cryostat surrounding said inner vessel; a second cylindrical shield situated in the cryostat surrounding said first shield; a plurality of tubular struts affixed to both of said inner vessel circular end faces and said second shield, said tubular struts circumferentially spaced and extending radially, parallel to said end shields of the helium vessel, to said second shield, said struts supporting said second shield spaced away from said helium vessel; and plate means circumferentially spaced about the outside of each of the circular end faces of said first shield and affixed thereto, said plate means extending radially, parallel to the end faces of said first shield and affixed to the inner circular end faces of said second shield, supporting said first shield spaced away from the second shield.
Claim 4
Dependent Claim
155 words
A cryostat for a magnetic resonance magnet comprising: a cylindrical inner vessel surrounding the magnet windings concentrically situated in the cryostat; a first cylindrical shield situated in the cryostat surrounding said inner vessel; a second cylindrical shield situated in the cryostat surrounding said first shield; a plurality of tubular struts affixed to both of said inner vessel circular end faces and said second shield, said tubular struts circumferentially spaced and extending radially, parallel to said end shields of the helium vessel, to said second shield, said struts supporting said second shield spaced away from said helium vessel; and plate means circumferentially spaced about the outside of each of the circular end faces of said first shield and affixed thereto, said plate means extending radially, parallel to the end faces of said first shield and affixed to the inner circular end faces of said second shield, supporting said first shield spaced away from the second shield.
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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) | 1992-06-05 | 1992-12-05 | 1993-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-05 | 1996-12-05 | 1997-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-05 | 2000-12-05 | 2001-06-06 | $7700.00 | Window Closed / Lapsed |