SEAT BELT PRETENSIONER

摘要

A seat belt pretensioner (20) has a straight tube (22) having a cylindrical wall (22a), a first end (24) and a second end (26). At least one. of the ends (24, 26) has an opening (32). The straight tube (22) has a first opening (38) in the wall (22a) to receive a curved tube (50). The curved tube (50) has a first end portion (52), a second end portion (56) and a central segment (54). The second end portion (56) is situated so that its center is collinear with a central axis (64) extending through the center of the straight tube (22). An axis extending through the center of the first end portion is arranged at an acute angle relative to the central axis (64). A pyrotechnic device (40) is provided at one end of the straight tube (22) to provide products of combustion to drive a piston (100) down the straight tube (22). The motion of the piston (100) moves a cable (80) in a direction to move a seat belt buckle (84) to reduce belt slack about a vehicle occupant.