Magnetic field generating device and method of shimming thereof

Details Magnetic field generating device and method of shimming thereof Magnetic field generating device and method of shimming thereof

2007-08-14

2007-08-14

Barrera, Ramon M. (Department: 2832)

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

Magnet structure or material

C335S297000, C335S301000, C335S306000, C324S320000

Reexamination Certificate

active

11385380

ABSTRACT:
A magnetic field generating device is disclosed having an arrangement of permanent magnets, each permanent magnet (PM) having a north end and a south end, and each aligned in the same north-south orientation. The PM arrangement is configured to have a surface at the north polarity end, a surface at the south polarity end, or a surface at both ends. A layer of ferromagnetic material is securely disposed at one of the surfaces of the PM arrangement, the layer having a thickness equal to or less than about 15 millimeters.

REFERENCES:
patent: 5475355 (1995-12-01), Abele et al.
patent: 5557205 (1996-09-01), Ohta et al.
patent: 6275128 (2001-08-01), Aoki et al.
patent: 6794973 (2004-09-01), Aoki et al.
patent: 2004/0246083 (2004-12-01), Aoki et al.

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