Seat belt retractor with tension controller

Details Seat belt retractor with tension controller Seat belt retractor with tension controller

1993-09-23

1995-05-02

Jillions, John M.

Winding, tensioning, or guiding

Reeling device

With spring motor

B60R 2244, B65H 7548

Patent

active

054112222

ABSTRACT:
A seat belt retractor having a web tension controlling mechanism (36) includes a spool (32) for holding seat belt webbing (11), a frame (30) supporting the spool (32) for rotation in winding and unwinding directions, and a pinion (78) supported for rotation with the spool (32). A gear (104) is rotated by the pinion (78) and stresses a coil spring (102) upon rotation of the spool (32) in the unwinding direction. The gear (104) has a spiral array of gear teeth (156) which moves the gear axis (106) radially relative to the pinion axis (60) and which thus changes the effective pitch diameter (d) of the gear (104) upon rotation of the gear (104) by the pinion (78). The gear axis (106) is further directed to move pivotally about a pivot axis (132) when the gear axis (106) moves radially relative to the pinion axis (60).

REFERENCES:
patent: 3997126 (1976-12-01), Karlsson
patent: 4061291 (1977-12-01), Cunningham
patent: 4097003 (1978-06-01), Stouffer et al.
patent: 4099683 (1978-07-01), Stouffer et al.
patent: 4640472 (1987-02-01), Epple
patent: 5014926 (1991-05-01), Rumpf et al.
patent: 5054162 (1991-10-01), Rogers

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