公开(公告)号：US20180222440A1

公开(公告)日：2018-08-09

申请号：US15742990

申请日：2016-07-08

Applicant: Key Safety Systems, Inc.

Inventor： Rudi Grzic ,  David R. Arnold ,  Gerald Keller ,  Besi Rrumbullaku

IPC: B60R22/46 ,  B60R22/405

CPC classification number: B60R22/4676 ,  B60R22/28 ,  B60R22/3413 ,  B60R22/405 ,  B60R2022/286 ,  B60R2022/3402 ,  B60R2022/3427

Abstract: A 3-point seat belt system having a seat belt retractor (20) with a spool (32), the spool (32) having a locked mode of operation and a freewheeling mode of operation; a seat belt (411) characterized as having a known elongation rate under stress; a collapsible member (40) wrapped about a center portion of the spool (32) of the retractor (20), the member (40) having an initial diameter dl when unstressed and collapsible to a lesser diameter of d2 under stress. The method having the step of generating a retarding force on the occupant (404) in proportion to the degree by which the collapsible member (40) collapses.