Patent ID: 6692027
Filing Date: 2004-02-17
Classification: B60R

Abstract:
A load limiting seat restraint retractor for a seat restraint system in a vehicle comprising:a housing for operative connection to vehicle structure; a take-up spool operatively connected to said housing and connected to a webbing of a seat restraint system for winding and unwinding the webbing; a rotatable torsion bar operatively connected to said housing to provide a constant load limiting on the webbing during an impact, said take-up spool being mounted on said torsion bar; a locking mechanism operatively connected to said torsion bar and said housing; and a load limiting device disposed between said locking mechanism and said take-up spool being rotatable with said torsion bar and fixed against axial movement relative to said torsion bar to cause deformation of a groove in a surface of said take-up spool to provide digressive load limiting on the webbing during the impact.