Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – Superconductive type
Patent
1997-01-16
1999-11-09
Donovan, Lincoln
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
Superconductive type
335296, 335297, 335301, 324319, H01F 606
Patent
active
059822600
ABSTRACT:
An open electromagnet for use in MRI apparatus includes a pair of field coils which respectively comprise juxtaposed poles between which an imaging volume of substantially homogeneous magnetic field is defined. A support structure, which serves rigidly to support the field coils in spaced apart relationship, includes two steel plates between which the field coils are positioned. The relative position of the field coils and the plates is selected such that forces of magnetic attraction between the field coils are at least partly counter-balanced by forces of attraction between the plates and the field coils. In this manner, the force on the field coils and their associated support structure due to the forces of attraction between the poles is significantly reduced or nullified.
REFERENCES:
patent: 5136273 (1992-08-01), Ohta
patent: 5343182 (1994-08-01), Ohta
patent: 5361054 (1994-11-01), Knuttel
patent: 5381122 (1995-01-01), Laskaris et al.
patent: 5412363 (1995-05-01), Breneman et al.
Laskaris et al. "A Cryogen-Free Open Superconducting Magnet for Interventional MRI Applications", IEEE Transations in Applied Superconductivity, vol. 5, No.2, pp. 163-168, Jun., 1995.
Barrera Raymond
Donovan Lincoln
Oxford Magnet Technology Limited
LandOfFree
MRI magnets does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with MRI magnets, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and MRI magnets will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1461913