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US 7,744,126 B2Granted
Tensioning device for seatbelts with an olive-shaped piston
AssigneeAutoliv Development AB
InventorsMichael Dürrer, Jens Ehlers, Maren Leyffer
Life of this patent
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AssigneeAutoliv Development AB
InventorsMichael Dürrer, Jens Ehlers, Maren Leyffer
Estimating the term…
A tensioning device for a seatbelt system in motor vehicles with a driving arrangement that comprises a tube having at least one tube section bent with a radius of curvature, and a piston guided movably in said tube, whereby the piston is connected via a driving cable to the part of the seatbelt system which carries out the tensioning movement, and whereby the piston can be moved in a longitudinal movement through the tube by means of a pyrotechnic drive, and the driving cable is fixed to the piston by means of a holding part held by the piston. The piston (14) is configured in the form of an olive with a larger radius in the longitudinal direction of the tube (10) than the effective radius in the transverse direction of the tube (10) and is provided with a bore (15) for passing through the driving cable (20) that is held in a compression sleeve (16) fixed on the side of the piston (14) that points in the direction of movement of the piston (14).
A tensioning device for a seatbelt system in motor vehicles with a driving arrangement that comprises a tube having at least one tube section bent with a radius of curvature, and a piston guided movably in the tube, whereby the piston is connected via a driving cable to a part of the seatbelt system which carries out the tensioning movement, and whereby the piston is movable for longitudinal movement through the tube by means of a pyrotechnic drive, and the driving cable is fixed to the piston by a holding part held by the piston, the piston is configured having a generally ellipsoidal form with a larger radius in the longitudinal direction of the tube than the effective radius in the transverse direction of the tube and is provided with a bore for passing through the driving cable that is held in a compression sleeve fixed on the side of the piston that faces in the direction of movement of the piston.
Dependencies are inferred from the claim text.