Winding – tensioning – or guiding – Strand tensioning device – Tortuous course
Patent
1992-11-19
1994-05-10
Stodola, Daniel P.
Winding, tensioning, or guiding
Strand tensioning device
Tortuous course
2421076, B60R 2234
Patent
active
053101324
ABSTRACT:
A belt retractor with tension relief for safety belt restraining systems includes a retracting spring (6) and an auxiliary spring (8) dimensioned more weakly than the latter. The retracting spring (6) acts between a housing (10) of the belt retractor and a spring receiver (12). The auxiliary spring (8) acts between the spring receiver (12) and the belt spool (2). By blocking a ratchet wheel (48) which is rotatable to a limited extent relatively to the spring receiver (12) a change can be made between a normal operation in which only the retracting spring (6) defines the automatic belt retraction force, and a comfort operation in which only the auxiliary spring (8) is effective. Between the spring receiver (12) and the belt spool (2) a friction brake (22, 24) is operative to dampen a tensioning operation of the auxiliary spring (8) by the retracting spring (6) on changing from comfort to normal operation. The brake (22, 24) can be selectively activated by sensing the relative rotation between the spring receiver (12) and the ratchet wheel (48) so that it is inactive in the comfort operation of the belt retractor.
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Darling John P.
Stodola Daniel P.
TRW (Repa) GmbH
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