Winding – tensioning – or guiding – Reeling device – With spring motor
Patent
1995-10-24
1997-06-10
Jillions, John M.
Winding, tensioning, or guiding
Reeling device
With spring motor
B60R 2228
Patent
active
056368062
ABSTRACT:
A seat belt retractor (10) has a spool assembly (14) with a spool sleeve (34) on which a seat belt webbing (16) is wound. The spool sleeve (34) is supported for rotation in webbing retraction and webbing withdrawal directions (A, B). A ratchet wheel (48) is provided for stopping rotation of the spool sleeve (34) in the webbing withdrawal direction (B). The ratchet wheel (48) is rotatable with the spool sleeve (34) in the webbing retraction and webbing withdrawal directions (A, B). A blocking mechanism (72) prevents rotation of the ratchet wheel (48) in the webbing withdrawal direction (B) to stop rotation of the spool sleeve (34). A portion (62, 64) of said spool sleeve (34) can deform a portion (54, 58) of the ratchet wheel (48). When the ratchet wheel (48) is prevented from rotating by the blocking mechanism (72) and a withdrawal force above a predetermined amount is applied to the webbing (16), the spool sleeve (34) is permitted to rotate in the webbing withdrawal direction (B) relative to the ratchet wheel (48) by deformation of the ratchet wheel, thereby absorbing kinetic energy. In another embodiment, a member (120) is mounted to rotate with a ratchet wheel (110) as a unit. Deformation of the member (120) can occur to absorb energy when the ratchet wheel (110) is blocked. In another embodiment a wheel (330) and a ratchet wheel (358) are provided and deformation of each can occur. Other embodiments are disclosed.
REFERENCES:
patent: 3632060 (1972-01-01), Balder
patent: 3790099 (1974-02-01), Beller
patent: 3941330 (1976-03-01), Ulrich
patent: 4273361 (1981-06-01), Takei et al.
patent: 4305554 (1981-12-01), Anderson
patent: 4323205 (1982-04-01), Tsuge et al.
Jillions John M.
TRW Vehicle Safety Systems Inc.
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