Winding – tensioning – or guiding – Reeling device – With spring motor
Patent
1994-10-21
1996-05-21
Jillions, John M.
Winding, tensioning, or guiding
Reeling device
With spring motor
B60R 22415
Patent
active
055181970
ABSTRACT:
A seat belt retractor (14) includes a spool (16) supported for winding and unwinding rotation. A locking pawl (60) has a locking position in which it extends into the path of movement of ratchet teeth (58) on the spool (16) so as to block unwinding rotation of the spool (16). The retractor (14) further includes a cycloidal gear (90) which rotates in an opposite direction and at a slower speed relative to the spool (16) in response to rotation of the spool (16). An actuator spring (140) has a first over-center condition in which it biases a lever (120) to pivot in a first direction, and has a second over-center condition in which it biases the lever (120) to pivot in a second direction. A pawl spring (124) moves the pawl (60) to the locking position in response to pivotal movement of the lever (120) in the second direction. The actuator spring (140) is switched between the first and second over-center conditions in response to rotation of the cycloidal gear (90).
REFERENCES:
patent: 4749141 (1988-06-01), Young
patent: 4749143 (1988-07-01), Tsukamoto et al.
patent: 4811912 (1989-03-01), Takada
patent: 4817885 (1989-04-01), Matsumoto
patent: 4948066 (1990-08-01), Matsumoto et al.
patent: 4951896 (1990-08-01), Rittersdorf
patent: 5080299 (1992-01-01), Gray et al.
patent: 5192035 (1993-03-01), Dufour
patent: 5257754 (1993-11-01), Hishon
Two photographs of a prior art apparatus.
Jillions John M.
TRW Vehicle Safety Systems Inc.
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