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    • 10. 发明申请
    • LINEAR SEAT BELT PRETENSIONER
    • 线性座椅防护带
    • US20130193740A1
    • 2013-08-01
    • US13361185
    • 2012-01-30
    • Dario BrisighellaChristopher FischerBrent Parks
    • Dario BrisighellaChristopher FischerBrent Parks
    • B60R22/195
    • B60R22/1955
    • A linear seat belt pretensioner includes a housing with a sealed axial cavity and a piston (52, 152, 232, 352, 452) slidable in the cavity. A gas generator (76, 166, 156, 376, 476) deploys into the axial cavity, thereby propelling the piston outward. Because the axial cavity is well sealed, the arrangement retains the gas pressure upon deployment and is capable of a restart after a partial displacement if additional slack develops. The piston travels by a distance (X) corresponding to the piston travel and shortens the length of seat belt webbing available outside the pretensioner device by twice or thrice the distance (2X). The axial cavity can be sealed with a bladder element, such as a rolling sock (38). Alternatively, the seal may be established by a hollow piston (152) forming a ballistic seal with the wall of the cavity under pressure.
    • 线性安全带预张紧器包括具有密封轴向空腔的壳体和可在空腔中滑动的活塞(52,152,232,352,452)。 气体发生器(76,166,156,376,476)展开到轴向空腔中,从而向外推动活塞。 由于轴向腔体密封良好,所以布置将保持部署时的气体压力,并且如果发生额外的松弛,则能够在部分位移之后重启。 活塞行进与活塞行程相对应的距离(X),并将预紧器装置外部可用的安全带织带的长度缩短两倍或三倍距离(2X)。 轴向空腔可以用诸如滚动袜(38)的气囊元件密封。 或者,可以通过中空活塞(152)来建立密封,所述中空活塞(152)在压力下与空腔的壁形成弹道密封。