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Seat track assembly for a motor vehicle having an integrated position sensor

  • US 7,147,261 B2
  • Filed: 07/18/2002
  • Issued: 12/12/2006
  • Est. Priority Date: 07/18/2001
  • Status: Expired due to Fees
First Claim
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1. A seat track assembly for a seat of a motor vehicle having a floor and an airbag, said seat track assembly comprising:

  • a stationary rail fixedly secured to the floor;

    a movable rail fixedly secured to the seat and slidably engaged with said stationary rail to move the seat therealong, said movable rail extending along a length between a forward position and a rearward position;

    a shunt defining an elongated body extending longitudinally along a portion of said length of said movable rail, said elongated body comprising a metallic strip having a portion thereof completely encased in a thermoplastic material along the longitudinal length of the metallic strip thereby defining a ferromagnetic surface adjacent a non-ferromagnetic surface; and

    a magnetic sensor fixedly secured to said stationary rail and disposed adjacent said shunt to determine a magnetic field strength and responsively produce a position signal indicating a position of said sensor relative to said shunt whereby said sensor sand said shunt are disposed within said stationary and movable rails to be protected thereby.

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