Land vehicles – Wheeled – Attachment
Patent
1975-03-28
1976-08-10
Song, Robert R.
Land vehicles
Wheeled
Attachment
B60R 2102
Patent
active
039737861
ABSTRACT:
A belt retractor for a vehicle occupant restraint system has a winding prevention mechanism which is interlocked to the vehicle door so as to cancel the winding prevention mechanism upon opening movement of the door. The retractor has a reel with a ratchet plate having ratchet teeth thereon. A control disc is frictionally clutched to the reel and is engageable with a spring biased pawl mounted on the housing to control movement of the pawl between a detenting position engaging the ratchet teeth to prevent reel rotation in the winding direction and an undetenting position disengaging the pawl from the ratchet teeth. A blocking disc is also frictionally clutched for rotation with the reel and is effective to capture and hold the pawl in undetenting position. Actuation and cancellation of this winding prevention mechanism is in response to a predetermined sequence of belt winding and unwinding movement. A plunger mounted on the vehicle body is engageable by the door for movement between a retracted position when the door is closed and an extended position when the door is open. A lever connects the pawl and the plunger to move the pawl from the detenting to the undetenting positions to thereby assure belt winding reel rotation by the winding spring whenever the vehicle door is moved to the open position.
REFERENCES:
patent: 3692328 (1972-09-01), Arlauskas
patent: 3797603 (1974-03-01), Loomba
patent: 3848888 (1974-11-01), Kazaoka
patent: 3869098 (1975-03-01), Sprecher
General Motors Corporation
Leahy C. E.
Song Robert R.
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