Metal treatment – Stock – Magnetic
Reexamination Certificate
2005-09-20
2009-11-17
Sheehan, John P. (Department: 1793)
Metal treatment
Stock
Magnetic
C148S302000, C148S103000, C419S012000, C075S244000
Reexamination Certificate
active
07618496
ABSTRACT:
A radial anisotropic sintered magnet formed into a cylindrical shape includes a portion oriented in directions tilted at an angle of 30° or more from radial directions, the portion being contained in the magnet at a volume ratio in a range of 2% or more and 50% or less, and a portion oriented in radial directions or in directions tilted at an angle less than 30° from radial directions, the portion being the rest of the total volume of the magnet. The radial anisotropic sintered magnet has excellent magnet characteristics without occurrence of cracks in the steps of sintering and cooling for aging, even if the magnet has a shape of a small ratio between an inner diameter and an outer diameter.
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Kawabata Mitsuo
Minowa Takehisa
Sato Koji
Birch & Stewart Kolasch & Birch, LLP
Sheehan John P.
Shin-Etsu Chemical Co. , Ltd.
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