Belt tensioner for an occupant restraint system

Details Belt tensioner for an occupant restraint system Belt tensioner for an occupant restraint system

1998-06-11

2000-10-31

English, Peter C.

Land vehicles

Wheeled

Attachment

297480, 60632, B60R 22195

Patent

active

061390585

ABSTRACT:
A compact belt tensioner for use in an occupant restraint system near an end of the webbing fixed to the vehicle body is disclosed. A piston/cylinder linear drive has a pair of opposed pistons and an expansion chamber with a pyrotechnic charge between the pistons. Each piston has an outer end shaped as a webbing engagement member. The belt webbing is looped around the engagement members between the fixed end of the belt and a deflector element mounted on the vehicle body. When the pyrotechnic charge is activated the pistons are driven outwardly, forming a belt loop the length of which is four times the piston stroke.

REFERENCES:
patent: 3982775 (1976-09-01), Lindblad
patent: 4015860 (1977-04-01), Tisell et al.
patent: 4232886 (1980-11-01), Tsuge et al.
patent: 4485985 (1984-12-01), Fohl
patent: 5845939 (1998-12-01), Greiner et al.

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