Seat belt retractor with cinch mechanism

Details Seat belt retractor with cinch mechanism Seat belt retractor with cinch mechanism

1986-09-26

1988-03-08

Werner, David

Winding, tensioning, or guiding

Strand tensioning device

Tortuous course

2421074A, 280806, 280807, 297476, 297480, A62B 3502, B65H 7548, B60R 2234

Patent

active

047295244

ABSTRACT:
A seat belt retractor includes a spool with seat belt webbing wound thereon. A frame supports the spool for rotation in a belt withdrawal direction or a belt retraction direction. A pawl engages ratchet teeth formed on end portions of the spool to prevent rotation of the spool in the belt withdrawal direction when a predetermined amount of seat belt webbing is withdrawn from the spool. A cam which has a multi-loop cam groove is rotatably driven by a gear train in response to spool rotation. A lever with a cam follower portion in the cam groove is pivoted by the cam to move the pawl into engagement with the ratchet teeth.

REFERENCES:
patent: 4391421 (1983-07-01), Naitoh et al.
patent: 4427164 (1984-01-01), Rumpf
patent: 4436255 (1984-03-01), Matsui et al.
patent: 4518132 (1985-05-01), Schmidt
patent: 4573646 (1986-03-01), Willey

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