Re-tightener with pyrotechnic propellant charge for safety-belt

Details Re-tightener with pyrotechnic propellant charge for safety-belt Re-tightener with pyrotechnic propellant charge for safety-belt

1979-04-02

1980-11-11

Jillions, John M.

Winding, tensioning, or guiding

Strand tensioning device

Tortuous course

2421074R, 280807, A67B 3500, B65H 7548

Patent

active

042328365

ABSTRACT:
Retightener with a pyrotechnic propellant charge for automatic safety-belt wind-up devices having an energy converter, wherein in the event of danger the explosive pressure of the ignited propellant charge acts on a pullout element tightening the safety belt around the body of the vehicle passenger to be protected via a liquid buffer arranged between the propellant charge and a pullback element. In accordance with the invention a receptacle which contains the liquid buffer is coupled to the winding shaft and rotates together with the latter. In the circumferential surface of the receptacle is at least one jet nozzle directed substantially tangentially to the axis of rotation and against a stationary guide ring surrounding the receptacle.

REFERENCES:
patent: 4014479 (1977-03-01), Nilsson
patent: 4142692 (1979-03-01), Andres

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