US5337001A
Expired / Lapsed
US
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Magnetic field generating assembly
Assignee: Oxford Instruments Superconductivity Ltd
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Filing: 1991-04-26
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Granted: 1994-08-09
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Expires: 2011-04-26
Abstract
Abstract A magnetic field generating assembly used in NMR apparatus includes a primary magnetic field generator for generating a primary magnetic field which is substantially homogeneous in the working region. The primary magnetic field generator is constructed such that an object to be examined can be introduced from outside the assembly into the working region in a direction transverse to the direction of magnetic flux through the working region. Gradient magnetic field coils are provided for imposing one or more magnetic field gradients through the working region. The gradient magnetic field coils are movable relative to the primary magnetic field generator for positioning locally to the position of an object to be examined in the working region.
Inventors
- 👤 Ian L. McDougall
- 👤 Alan G. M. Armstrong
- 👤 Robert C. Hawkes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:29
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/20; G01R33/28; G01R33/42; G01R33/422; G01R33/38; G01R33/3806; G01R33/385
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
181 words
A magnetic field generating assembly for use in NMR apparatus, the assembly comprising: a primary magnetic field generating means for generating magnetic flux in a direction defined by a primary magnetic field which is substantially homogeneous in a working region, the primary magnetic field generating means being constructed such that an object to be examined is introduced from outside the assembly into the working region in a direction transverse to the direction of magnetic flux through the working region; and a gradient magnetic field generating means for imposing one or more magnetic field gradients through the working region, the gradient magnetic field generating means being movable relative to the primary magnetic field generating means for positioning locally to the position of an object to be examined in the working region; and wherein the gradient magnetic field generating means is mounted to a support structure which is fixed relative to said primary magnetic field generating means and which enables the gradient magnetic field generating means to be moved in any one or more of three orthogonal directions relative to the working region.
Claim 2
Dependent Claim
181 words
A magnetic field generating assembly for use in NMR apparatus, the assembly comprising: a primary magnetic field generating means for generating magnetic flux in a direction defined by a primary magnetic field which is substantially homogeneous in a working region, the primary magnetic field generating means being constructed such that an object to be examined is introduced from outside the assembly into the working region in a direction transverse to the direction of magnetic flux through the working region; and a gradient magnetic field generating means for imposing one or more magnetic field gradients through the working region, the gradient magnetic field generating means being movable relative to the primary magnetic field generating means for positioning locally to the position of an object to be examined in the working region; and wherein the gradient magnetic field generating means is mounted to a support structure which is fixed relative to said primary magnetic field generating means and which enables the gradient magnetic field generating means to be moved in any one or more of three orthogonal directions relative to the working region.
Claim 3
Dependent Claim
21 words
An assembly according to claim 1, further comprising an RF coil mounted for movement with the magnetic gradient field generating means.
Claim 4
Dependent Claim
23 words
An assembly according to claim 1, wherein the working region is projected beyond the volume defined by the primary magnetic field generating means.
Claim 5
Dependent Claim
16 words
An assembly according to claim 1, wherein the primary magnetic field generating means comprises a C-magnet.
Claim 6
Dependent Claim
17 words
An assembly according to claim 1, wherein the primary magnetic field generating means comprises a superconducting magnet.
Claim 7
Dependent Claim
23 words
An assembly according to claim 2, wherein the working region is projected beyond the volume defined by the primary magnetic field generating means.
Claim 8
Dependent Claim
16 words
An assembly according to claim 2, wherein the primary magnetic field generating means comprises a C-magnet.
Claim 9
Dependent Claim
17 words
An assembly according to claim 2, wherein the primary magnetic field generating means comprises a superconducting magnet.
Claim 10
Dependent Claim
17 words
An assembly according to claim 3, wherein the primary magnetic field generating means comprises a superconducting magnet.
Claim 11
Dependent Claim
17 words
An assembly according to claim 4, wherein the primary magnetic field generating means comprises a superconducting magnet.
References Cited (Backward Citations)
US4689591A
Cited
EP0217520A2
Cited
WO1988009927A1
Cited
EP0307981A1
Cited
EP0314262A2
Cited
US5146924A
Cited
EP0362931A2
Cited
US4920316A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-08-08 | 1998-02-07 | 1998-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-08-08 | 2002-02-07 | 2002-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-08-08 | 2006-02-07 | 2006-08-09 | $7700.00 | Window Closed / Lapsed |