VEHICLE SEAT BELT TENSIONING DEVICE Russian patent published in 1995 - IPC

FIELD: transport passive safety means. SUBSTANCE: tensioning device has cylinder 3 arranged inside and coaxially with housing 1 provided with central hole 2 at side of seat belt. Cylinder 4 is arranged inside and coaxially with cylinder 3. Compression spring 9 is installed outside and coaxially with cylinder. Outer surface of cylinder 4 is embraced by compression spring 10. End of cylinder 3 at side opposite to seat belt is made in form of collet 5 whose tabs have projection 6 with conical surface. Hollow rod 11 is installed inside and coaxially with cylinder 4. End of hollow rod is connected at side of seat belt with impact pickup 12 arranged inside and coaxially with housing 1. Cup 18 coaxial with cup 14 rests on projections 6 of tabs of collet 5. Cup 18 has slots 21 for deflection of tabs of collet 19 arranged inside and coaxially with cup 18. Collet 19 rests on cup 18 and can be shifted relative to cup 18. Number of tabs of collet 19 is equal to number of slots 21 of cup 18 and slots between tabs of collet 5. Tabs of collet 19 can flex in slots between tabs of collet 5. Impact pickup 12 is made in form of collet, outer surface of collet tabs has cylindrical projections 16 to interlock seat belt and has conical surface 17. EFFECT: enhanced safety. 2 cl, 2 dwg