US 6,982,620 B1 | ||
Magnet structure | ||
Gordon Danby, Wading River, N.Y. (US); John Jackson, Shoreham, N.Y. (US); Raymond Damadian, Woodbury, N.Y. (US); William H. Wahl, Smithtown, N.Y. (US); and Anthony Tenore, Yonkers, N.Y. (US) | ||
Assigned to Fonar Corporation, Melville, N.Y. (US) | ||
Filed on Nov. 23, 2001, as Appl. No. 9/998,907. | ||
Claims priority of provisional application 60/252422, filed on Nov. 22, 2000. | ||
Int. Cl. H01F 5/00 (2006.01) |
U.S. Cl. 335—299 | 67 Claims |
1. A magnet structure, comprising:
a first permanent magnet mass;
a first pole, having a first pole face and disposed on the first permanent magnet mass;
a second permanent magnet mass;
a second pole, having a second pole face and disposed on the second permanent magnet mass; and
a frame connecting the first permanent magnet mass to the second permanent magnet mass, such that the first pole face is substantially
opposite and facing the second pole face to define a magnetic field volume in a gap located between the first pole face and
the second pole face;
wherein the first and second permanent magnetic masses include discrete magnetic elements;
wherein the discrete magnetic elements are respective first and second pluralities of bricks made of magnetic material;
wherein each said first and second pluralities of bricks includes main bricks oriented so as to direct a main magnetic field
in a first direction, and bucking bricks oriented to direct a blocking magnetic field in a second direction.
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