Patent ID: 9688241
Date: 2017-06-27
CPC Classifications: B60R

Claim:
1. A pretensioner apparatus of a seat belt for a vehicle, comprising: a movement tube; a piston movably disposed inside the movement tube; a gas generator fluid-connected to the movement tube and generating a gas upon crash of the vehicle so as to inject the gas into the movement tube to move the piston in a predetermined direction; a linkage unit; a worm connected to the piston through the linkage unit; and a worm wheel engaged with the worm, wherein the worm rotates by movement of the piston via the linkage unit when the piston moves in the predetermined direction by the gas generated by the gas generator, and wherein the worm wheel fixed to a spool rotates together with the worm to rotate the spool and a seat belt webbing connected to the spool is wound around the spool while the worm rotates by the movement of the piston.