Apparatus for sensing vehicle seat position
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United States of America Patent
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Jul 26, 2005
Grant Date -
Jun 17, 2004
app pub date -
Dec 11, 2002
filing date -
Dec 11, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An apparatus (10) for sensing the position of a vehicle seat (12) movable between a forward position and a rearward position includes a Hall effect device (80) and a magnet (82) that produces a magnetic field that acts on the Hall effect device. A member (100) is constructed of a ferromagnetic material and has a portion (110) positioned adjacent the magnet (82). The portion (110) has a size that is unique for every different position of the vehicle seat (12) between the forward and rearward positions. The portion (110) of the member (100) alters the flux path of the magnetic field which varies the portion of the magnetic field acting on the Hall effect device (80) to a degree that depends on the size of the portion. The Hall effect device (80) provides a signal functionally related to the magnitude of the magnetic field acting on the Hall effect device.
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