Rotation angle detecting apparatus

Details Rotation angle detecting apparatus Rotation angle detecting apparatus

2008-05-27

2008-05-27

Aurora, Reena (Department: 2862)

Electricity: measuring and testing

Magnetic

Displacement

Reexamination Certificate

active

07378841

ABSTRACT:
A rotation angle detecting apparatus includes: a first permanent magnet; a second permanent magnet disposed so as to face the first permanent magnet, the second permanent magnet rotating together with a shaft; an arc-shaped first magnetic member and second magnetic member fixed to the first permanent magnet and the second permanent magnet; and a magnetic resistor disposed in an air gap formed between the first magnetic member and the second magnetic member so as to be axially aligned with the shaft, the first magnetic member and the second magnetic member each including: a projecting portion pointed at the magnetic resistor; and a wall portion surrounding the magnetic resistor so as to prevent influence from external magnetic fields.

REFERENCES:
patent: 4392375 (1983-07-01), Eguchi et al.
patent: 5055781 (1991-10-01), Sakakibara et al.
patent: 6930477 (2005-08-01), Kurita et al.
patent: 10 2004 031 664 (2005-09-01), None
patent: 11-094512 (1999-04-01), None
patent: 2001-317909 (2001-11-01), None
patent: 2005-233768 (2005-09-01), None

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