Patent ID: 7401815

Claim:
A seat belt retractor assembly for a motor vehicle occupant restraint system of the type having a shoulder belt, a lap belt, and a latch plate between the shoulder belt and the lap belt engageable with a buckle, the assembly comprising: a retractor frame adapted to be mounted to the motor vehicle, a shoulder belt spool assembly affixed to the frame and connected with the shoulder belt and having a rotatable shoulder belt spool with the shoulder belt wound on the shoulder belt spool for stowing and paying out the shoulder belt, a lap belt spool assembly affixed to the frame and connected with the lap belt and having a rotatable lap belt spool with the lap belt wound on the lap belt spool for stowing and paying out the lap belt, and a pretensioner system having a single gas source communicating with a shoulder belt spool pretensioner and a lap belt spool pretensioner, the shoulder belt spool pretensioner coupled to the shoulder belt spool assembly and the lap belt spool pretensioner coupled to the lap belt spool assembly, the shoulder belt spool pretensioner includes a shoulder belt pretensioner tube which conducts gas from the gas source wherein gas flowing in the shoulder belt pretensioner tube causes rotation of the shoulder belt spool for pretensioning the shoulder belt, and the lap belt spool pretensioner includes a lap belt spool pretensioner tube which conducts gas from the gas source wherein gas flowing in the lap belt pretensioner tube causes rotation of the lap belt spool for pretensioning the lap belt.