Seat belt retractor with auxiliary shaft load limiting

Details Seat belt retractor with auxiliary shaft load limiting Seat belt retractor with auxiliary shaft load limiting

1995-08-11

1997-03-18

Jillions, John M.

Winding, tensioning, or guiding

Reeling device

With spring motor

B60R 2228

Patent

active

056114982

ABSTRACT:
A seat belt retractor comprising seat belt webbing; a spool for storing webbing thereon, the spool rotationally mounted on a frame; a rewind spring for rewinding or retracting the webbing; at least one drive gear having gear teeth mounted for rotation with the spool; an auxiliary shaft rotationally mounted on the frame including a least one driven gear thereon in meshing engagement with the at least one drive gear; a ratchet nut mounted to rotate with and slide along the auxiliary shaft; a first lock bar for preventing the rotation of the ratchet nut while permitting the nut to slide relative to the auxiliary shaft; a first energy absorbing bushing mounted about the auxiliary shaft and in selective contact with the ratchet nut for generating when deformed by the ratchet nut a relatively constant reaction force on the spool to oppose any protraction of the webbing during an emergency.

REFERENCES:
patent: 3927846 (1975-12-01), Meissner
patent: 3952967 (1976-04-01), Barile et al.

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