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US 11,670,450 B2Granted
Tapered ferrite core, its production method and apparatus, and inductance device comprising it
AssigneeProterial, Ltd.
InventorsAkihiro Maeta, Katsumasa Yamasaki
Life of this patent
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Abstract
A tapered ferrite core having a solid or hollow cylindrical shape with larger length than outer diameter, and comprising a ground taper portion in at least one end portion, the taper portion having ground streaks extending in the longitudinal direction of the ferrite core, can be formed by centerless-grinding a rotating ferrite core by a rotating grinder.
Claims4
A tapered ferrite core having a solid or hollow cylindrical shape with larger length than outer diameter;
- said ferrite core having a ground taper portion in at least one end portion;
- and
- said taper portion having ground streaks extending in the longitudinal direction of the ferrite core.
A tapered ferrite core having a solid or hollow cylindrical shape with larger length than outer diameter;
- said ferrite core having a ground taper portion in at least one end portion;
- and
- said taper portion having ground streaks extending in the longitudinal direction of the ferrite core and radially isotropically extending from a center axis of the ferrite core.
Dependencies are inferred from the claim text.