Seat belt retractor with energy management

Details Seat belt retractor with energy management Seat belt retractor with energy management

1996-02-23

1997-04-08

Darling, John P.

Winding, tensioning, or guiding

Reeling device

With spring motor

280805, B60R 2228

Patent

active

056180063

ABSTRACT:
A seat belt webbing retractor (10) includes a spool assembly (60) around which seat belt webbing (16) is wound. The spool assembly (60) is rotatable in webbing withdrawal and webbing retraction directions (A,B). A ratchet wheel (70) is rotatable in the withdrawal and retraction directions (A,B) with the spool assembly (60). A lock pawl (146) is engageable with the ratchet wheel (70) for blocking rotation of the ratchet wheel (70) and the spool assembly (60) in the withdrawal direction (A). The spool assembly (60) is rotatable relative to the ratchet wheel (70) upon an occurrence of a tension above a predetermined amount in the webbing (16). A take-up member (102) is rotatable with the spool assembly (60) relative to the ratchet wheel (70). A deformable member (120) is plastically deformed during a plurality of rotations of the take-up member (102) and spool assembly (60) relative to the ratchet wheel (70). In one embodiment, a plurality of deformable members (266) are included, and a controller (362) controls the deformation of the plurality of deformable members, thereby to change the amount of energy absorption.

REFERENCES:
patent: 3547468 (1970-12-01), Giuffrida
patent: 3561690 (1971-02-01), Muskat
patent: 3632060 (1972-01-01), Balder
patent: 3666198 (1972-05-01), Neumann
patent: 3848828 (1974-11-01), Kuhl
patent: 4027905 (1977-06-01), Shimogawa et al.
patent: 4088280 (1978-05-01), Arlauskas et al.
patent: 4129321 (1978-12-01), Garvey
patent: 4323205 (1982-04-01), Tsuge et al.
patent: 4358136 (1982-11-01), Tsuge et al.
patent: 5211694 (1993-05-01), Sakakida et al.
patent: 5511739 (1996-04-01), Dybro et al.

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