Patent ID: 6139058
Filing Date: 2000-10-31
Classification: B60R

Abstract:
A belt tensioner in a vehicle occupant restraint system comprising a safety belt, said safety belt having an end anchored to a vehicle body, a piston/cylinder linear drive which has a cylinder, a pair of axially opposed pistons accommodated in opposed ends of said cylinder, an expansion chamber within said cylinder between said pistons, and a pyrotechnic propellant charge, and further comprising a deflector element fixedly mounted with respect to said vehicle body, each piston carrying an engagement element on an outward end face thereof and both engagement elements being looped around by said belt between the deflector element and the end of the belt which is anchored to the vehicle body, wherein the belt is guided between the deflector element and a clamping roller mounted opposite to said deflector element, the clamping roller being mounted rotatably and being movable towards the belt.