Tensioner for a seatbelt
AssigneeTRW Automotive GmbH
InventorHans-Peter Betz
Life of this patent
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Abstract
A tensioner (10) for a seat belt includes a cylinder tube (12), a piston (14) that is movably arranged in the cylinder tube (12), a tension transmission means (24) connected to the piston (14) at a connecting portion (26) for transmitting the movement of the piston (14) to the seat belt, as well as a drive (18) which is adapted to exert a driving force in a tensioning direction A on the piston (14) so as to tension the seat belt. The tensioner (10) moreover includes a return stop which counteracts a displacement of the piston (14) in a direction B opposite to the tensioning direction A. The connecting portion (26) is arranged in the tensioning direction A ahead of the return stop.
Claims11
1-11. (canceled)
A tensioner (10) for a seat belt, comprising:
- a cylinder tube (12),
- a piston (14) that is movably arranged in the cylinder tube (12),
- a tension transmission means (24) connected to the piston (14) at a connecting portion (26) and transmitting the movement of the piston (14) to the seat belt,
- a drive (18) that is adapted to exert a driving force in a tensioning direction A on the piston (14), and
- a return stop that counteracts a displacement of the piston (14) in a direction B opposite to the tensioning direction A,
- wherein the connecting portion (26) is arranged in the tensioning direction A ahead of the return stop,
- and wherein the piston (14) has a conical portion (28) which is part of the return stop and that the connecting portion (26) borders on the end of the conical portion (28) which has the smaller diameter.
Dependencies are inferred from the claim text.