| 摘要 |
<p>A pretensioner for a vehicle safety restraint arrangement, the pretensioner comprising a piston mounted in a guide chamber for translational movement tangentially to a spool shaft, so that in travelling through the guide chamber, the piston engages the periphery of the spool shaft and causes it to rotate, and wherein the region of the chamber into which the piston moves after engaging the shaft has a wall which is weakened so as to be deformable to absorb force from the movement of the piston towards the end of a piston stroke. <IMAGE></p> |
