Seat belt pretensioner

Details Seat belt pretensioner Seat belt pretensioner

B - Operations, Transporting

60

R

B60R 22/46 (2006.01) F16H 55/08 (2006.01)

Patent

CA 2085422

Abstract of the Disclosure Seat Belt Pretensioner A seat belt pretensioner (P) of the type which rotates the take-up shaft (R1) of a retractor (R) in the belt-winding direction so as to wind a length of the belt onto the retractor reel (R3) includes a driven gear (3) connected to the retractor take-up shaft (R1) and a driving gear (1) connected to a power source (2), the driving gear (1) normally being held in clearance from the driven gear (3) in the set condition of the pretensioner and being displaced and rotated upon operation of the power source (2) to engage it with the driven gear( 3) and to drive the driven gear in rotation. The teeth (11 or 31) of one of the gears (1 or 3) have addenda that diverge from the addendum circle in the direction of the root circle and in a direction with respect to the direction of rotation of the driving gear (1) such as to facilitate movement of the driving gear (1) into driving engagement with the driven gear (3) in the event of a collision of the addenda of the two gears (1 and 3).

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