Patent ID: 8960724
Filing Date: 2015-02-24
Classification: B60R

Abstract:
1. A seatbelt pretensioner for reducing slack in seatbelt webbing upon deployment in response to a triggering event, the pretensioner comprising: an igniter that generates gas in response to the triggering event; an elongate body defining a chamber for receiving and confining gas generated by the igniter, the elongate body has a vent hole and a plug sealing the vent hole, the plug being retractable from the vent hole, the plug is disposed on a frame and retracts from the vent hole to unseal the vent hole when the frame is loosened during disassembly of the pretensioner after deployment; a piston movable within the elongate body by the gas generated; a slack-reducing assembly that responds to movement of the piston and is connected to at least a portion of seatbelt webbing, movement of the piston causes the slack-reducing assembly to move the seat belt webbing reducing slack in the seatbelt webbing; and a controlled pressure release that enables gas to escape from the elongate body after deployment, relieving gas pressure within the pretensioner.