Belt retractor with tension relief for safety belt restraining s

Details Belt retractor with tension relief for safety belt restraining s Belt retractor with tension relief for safety belt restraining s

1992-11-19

1994-02-15

Stodola, Daniel P.

Winding, tensioning, or guiding

Strand tensioning device

Tortuous course

2421075, B60R 2244

Patent

active

052859827

ABSTRACT:
For tension relief in comfort operation of a belt retractor for safety belt restraining systems in vehicles an auxiliary spring (42) is provided which is selectively connectable parallel to the retracting spring (30) but with opposite effect. The auxiliary spring (42) is connected with its outer end to the outer periphery of a ratchet wheel (38) which can be selectively locked by a pawl, and with its inner end via an overrunning clutch (44) is connected to a shaft (36) which is non-rotatably connected to the belt spool (22). The overrunning clutch (44) permits a relative rotation between the end of the auxiliary spring (42) connected thereto and the belt spool (22) only in the unwinding direction of the latter. The changeover between normal and reduced retracting force takes place without any shock or noise whatever.

REFERENCES:
patent: 4026494 (1977-05-01), Tanaka
patent: 4084764 (1978-04-01), Mogerlein et al.
patent: 4108393 (1978-08-01), Henderson
patent: 4125231 (1978-11-01), Henderson
patent: 4183476 (1980-01-01), Fohl
patent: 4216922 (1980-08-01), Weman
patent: 4228968 (1980-10-01), Jahn
patent: 4456196 (1984-06-01), Takada et al.
patent: 4907757 (1990-03-01), Rumpf et al.
patent: 5131594 (1992-07-01), Refior et al.

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