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RETRACTOR WITH ROTARY RACK PRETENSIONER

  • US 20070241223A1
  • Filed: 03/23/2007
  • Published: 10/18/2007
  • Est. Priority Date: 04/17/2006
  • Status: Active Grant
First Claim
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1. A seat belt retractor (100) having a rotationally mounted spool (120) with a seat belt wound or windable thereon and a pretensioner (300) for selectively winding the spool in a belt winding direction to rewind the seat belt upon the spool;

  • the pretensioner comprising;

    a power transfer mechanism (350) activated by a pyrotechnic element (400) for causing a clutch assembly (200) to change state from a disengaged mode to an engaged mode in which the clutch assembly drivingly engages the spool;

    the clutch assembly (200) comprising a clutch housing (210) having provision to support a plurality of rotationally mounted clutch pawls (240, 240a-c), the clutch housing received within a recess (202) of the spool (120), such recess including a plurality of engagement teeth (204) thereon, each of the clutch pawls configured to be column loaded between the spool and the clutch housing when in the engaged mode.

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