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Automotive seat safety mechanism

  • US 6,935,456 B2
  • Filed: 01/06/2003
  • Issued: 08/30/2005
  • Est. Priority Date: 01/21/2002
  • Status: Expired due to Fees
First Claim
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1. An automotive seat safety mechanism including an automotive seat having a seat cushion and a seat back, which is arranged on a rear portion of the seat cushion, and a webbing arranged between the seat back and an upper portion of a vehicle, wherein a retractor urges the webbing in a winding direction to draw in the webbing while simultaneously permitting the webbing to be drawn out of the reactor in an unwinding direction when in a normal state and prevents the webbing from being drawn out when acceleration or deceleration of the vehicle becomes greater than or equal to a predetermined value, the automotive seat safety mechanism comprising:

  • a bypassing mechanism arranged above the seat back; and

    a pretensioner included in the retractor;

    wherein the retractor is arranged rearward from the seat back in the upper portion of the vehicle;

    wherein the webbing has an end secured to an upper position of the seat back and is extended to the retractor through a guide that is engaged with the bypassing mechanism;

    wherein the guide with the webbing is disengaged from the bypassing mechanism when forward deceleration of the vehicle becomes greater than or equal to a predetermined value; and

    wherein the pretensioner of the retractor is activated to quickly draw in the webbing in the winding direction in response to the forward deceleration.

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