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1. (WO1998052798) DEVICE FOR PREVENTION OF SLAP-BACK LOCK OF INERTIA REEL

Pub. No.:    WO/1998/052798    International Application No.:    PCT/US1998/010324
Publication Date: Fri Nov 27 00:59:59 CET 1998 International Filing Date: Wed May 20 01:59:59 CEST 1998
IPC: B60R 22/34
B60R 22/38
Applicants: AM-SAFE, INC.
Inventors: CARPENTER, Christopher
ZOLLINGER, Lindsay, P.
FREEMAN, Michael, J.
WARRICK, James, C.
HAGAN, Willard, F.
Title: DEVICE FOR PREVENTION OF SLAP-BACK LOCK OF INERTIA REEL
Abstract:
A conventional webbing-locking inertia reel is modified by integration of a device for the prevention of slap-back lock of the inertia reel upon excessively rapid retraction of the webbing worn by a seat occupant as a safety belt and/or harness. The device also slows the retraction of the webbing enough to prevent a hard collision of the webbing stop at the inertia reel. This is accomplished by interacting the reel shaft with specially designed damping disk (52) so that both the shaft and the damping disk rotate counterclockwise when an external force pulls the webbing from its rotatable spool, while simultaneously the shaft also interacts with a conventional housed return spring, causing it to wind and build up a rewinding force, which, when the external force is removed or ceases, causes rotation of the shaft, spool, and damping disk clockwise and rewinds the webbing on the spool. The damping disk is installed in a damper housing section (70) filled with a special high-viscosity synthetic grease so that damping occurs when the damping disk (52) is rotated, due to the shear of the grease that occurs when the two surfaces, that of the damping disk and the housing wall, move relative to each other.