Belt retractor with winding prevention mechanism

Details Belt retractor with winding prevention mechanism Belt retractor with winding prevention mechanism

1976-12-15

1977-12-27

Song, Robert R.

Land vehicles

Wheeled

Attachment

2421077, B60R 2110

Patent

active

040651550

ABSTRACT:
A seat belt retractor has a reel for winding and unwinding a restraint belt and a winding spring urging winding rotation of the reel to tension the belt about the body of a seat occupant. A pawl is pivotally mounted for engagement with a ratchet wheel carried by the reel to prevent belt winding rotation and thereby relieve the tension on the belt. A spring acts on the pawl to normally urge the pawl toward engagement with the ratchet reel and goes overcenter upon predetermined movement of the pawl away from engagement with the ratchet wheel so that the spring holds the pawl in a disabled position. A control disc is connected to the reel by a friction clutch for rotation therewith and has a cam surface for controlling movement of the pawl into and out of engagement with the ratchet wheel and further cam surfaces for operating the pawl to and from the disabled position upon predetermined sequence of rotation of the control disc.

REFERENCES:
patent: 3834646 (1974-09-01), Heath
patent: 3869098 (1975-03-01), Sprecher
patent: 4002311 (1977-01-01), Fisher et al.
patent: 4023746 (1977-05-01), Magyar

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