Patent ID: 9511742
Filing Date: 2016-12-06
CPC Classification: B60R

Claim Text:
1. A seat belt pretensioner for use with a seat belt assembly having an anchor, a buckle and a webbing, the pretensioner comprising: a casing defining a pivot axis and including a locking member; a driving mechanism supported by the casing, the driving mechanism including a movable member that is configured to move relative to the casing during pretensioning; a flexible connecting member having a first end coupled to the movable member and a second end configured to be coupled to one of the anchor, the buckle and the webbing; and a cam including a locking surface having a cross-sectional shape that is an Archimedean spiral, wherein the cam is rotatable about the pivot axis relative to the casing between a non-locking position, in which the connecting member is able to freely move between the cam and the locking member of the casing, and a locking position, in which the locking surface clamps the connecting member to the locking member to prevent any further movement of the connecting member relative to the locking member.