Position detection magnet and position detection apparatus
US8330454B2 · kind B2 · utility
3Cited by
3References
12Claims
0Family size
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Key dates
| Filing date | Oct 13, 2009 |
| Grant date | Dec 11, 2012 |
| Priority date | — |
| Expiry date | Jan 1, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D2205/90
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A position detection apparatus includes a position detection target member, a magnet that moves in accordance with movement of the position detection target member, and a plurality of magnetic detectors provided on a surface opposite a movement plane of the magnet. A flat yoke is provided on the reverse face of the magnet. The magnetic polarity of a peripheral side part of the magnet is opposite to the magnetic polarity of a center part thereof. The peripheral side part is formed at a regional range that can be defined on the basis of a predetermined distance(s) measured from a side edge of the yoke.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.