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Passenger restraining protective system

  • US 6,702,326 B1
  • Filed: 11/28/2000
  • Issued: 03/09/2004
  • Est. Priority Date: 11/29/1999
  • Status: Active Grant
First Claim
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1. A passenger restraining protective system having a seat belt retracting apparatus for retracting a seat belt in order to restrain a passenger of a vehicle, comprising:

  • a first pretensioner having a motor adapted to operate when the possibility of a collision is determined to exist, to thereby retract the seat belt until the tension of the seat belt reaches a first belt tension that is higher than the belt tension that exists during normal driving conditions, the motor including a deceleration mechanism for converting rapid rotation of the motor into torque for producing the first belt tension;

    a second pretensioner adapted to operate when a collision is determined to have occurred, to thereby retract the seat belt until the tension of the seat belt reaches a second belt tension that is higher than said first belt tension;

    a controller which, when a collision is determined to have occurred, is adapted to cause said second pretensioner to operate, irrespective of the operation of said first pretensioner.

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