Patent ID: 6227478
Filing Date: 2001-05-08
Classification: B60R

Abstract:
A linear drive for a belt tensioner, comprising:a cylinder tube with an end wall at an axial end and an opening in said end wall,a piston shiftably accommodated in said cylinder tube, said piston comprising a hollow inner space,and a pyrotechnical propellant charge adapted to generate compressed gas acting upon said inner space of said piston over a piston stroke within said cylinder tube,a pad of wire conglomerate being arranged within said cylinder tube adjacent said end wall,said piston having an axial end facing said end wall of said cylinder,said axial piston end having a passage therein,said passage being internally covered by a burst disc,said pad being initially elongated and being axially compressed to a thin disc by said piston after said piston has reached an end of the piston stroke.