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US 7,023,309 B2Granted
Permanent magnet assembly and method of making thereof
AssigneeGeneral Electric Company
InventorsEvangelos Trifon Laskaris, Michael Anthony Palmo, Kathleen Melanie Amm, Paul Shadforth Thompson
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Abstract
An imaging apparatus, such as an MRI system, contains at least one layer of soft magnetic material between the yoke and each permanent magnet. This imaging apparatus may be operated without pole pieces due to the presence of the soft magnetic material. The permanent magnets may be fabricated by magnetizing unmagnetized alloy bodies after the unmagnetized alloy bodies have been attached to the yoke.
Claims14
A method of making a magnet assembly, comprising:
- placing a plurality of blocks of a material suitable for use as a permanent magnet into a mold cavity having a non-uniform cavity surface contour;
- filling the mold cavity with an adhesive substance to bind the plurality of blocks into a first assembly comprising a unitary body, such that a first surface of the unitary body forms a substantially inverse contour of the non-uniform mold cavity surface;
- and
- removing the first assembly from the mold cavity.
1 more element
A method of making a magnet assembly, comprising:
- placing a plurality of blocks of a material suitable for use as a permanent magnet into a mold cavity;
- filling the mold cavity with an adhesive substance to bind the plurality of blocks into a first assembly comprising a unitary body;
- removing the first assembly from the mold cavity;
- and
- attaching the first assembly to a portion of an MRI system yoke.
2 more elements
Dependencies are inferred from the claim text.