Pretensioner for a safety belt drive
AssigneeTRW Repa GmbH
InventorsErwin B uhr, Volker Holzapfel, J urgen Petzi, Klaus B ohmler
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Abstract
A belt pretensioner for a safety belt comprises a pyrotechnic propellant charge (34) able to be operated by a fuze (48) and adapted to act on a drive device for a belt pretensioner. The drive device comprises a piston (18), adapted to be moved in translation, of a piston and cylinder unit. The pyrotechnic propellant charge (34) is mounted within the extent of a cylinder space (28) enclosed by the piston and cylinder unit. The fuze (48) is designed in the form of a self-contained unit and arranged separately from the propellant charge (34).
Claims5
A safety belt pretensioner drive comprising a cylinder and a hollow piston slidably accommodated in said cylinder, said hollow piston defining an internal cylindrical space, a pyrotechnical charge being filled into said space, said cylinder having a bottom wall spaced from said piston, a cylindrical chamber defined between said bottom wall and said piston, said bottom wall having a through opening and a fuse being seated in said through opening axially spaced from said pyrotechnical charge.
Dependencies are inferred from the claim text.