Patent ID: 7823924
Filing Date: 2010-11-02
Classification: B60R

Abstract:
1. A seatbelt pretensioner for tensioning a seatbelt of a vehicle, the pretensioner comprising: a cylinder having a proximal section which defines a gas chamber that forms at least a portion of an interior space defined by the cylinder, and a guide section extending distally from the proximal section; a piston disposed within the interior space of the cylinder and moveable toward a distal end of the guide section, the piston having a proximal portion and a distal portion extending therefrom, the proximal and distal portions disposed respectively adjacent to the proximal and guide sections, the distal portion configured for attaching to an anchor that is coupled to webbing of the seatbelt; a gas generator in fluid communication with the gas chamber and configured for generating gas to move the piston, tensioning the seatbelt; and a seal sealably interfacing with an inner surface of the proximal section of the cylinder and engaged with the proximal portion of the piston so as to move with the piston to obstruct the gas from leaking from the gas chamber during tensioning of the seatbelt.