Belt Tensioner for a Seat Belt System
AssigneeDaimler AG
InventorWalter Eberle
Life of this patent
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Abstract
A vehicle seat belt tensioner comprises a traction element that transmits a tensioning force to a seat belt strap. The traction element may be formed for example of a flexible rope or a wire, or a thrust element which can transmit traction and thrust forces. A force limiting unit, which limits the retaining force exerted by the seat belt strap on a passenger has a functional element coupled to the traction or thrust element, which is displaceable by means of a displaceable piston element in the effective direction of the tensioning force. The vehicle belt tensioner according to the invention includes means for the parallel application of tensioning force to both the piston element and the traction or thrust element, concurrently.
Claims33
-31. (canceled)
A belt tensioner for a seat belt system of a vehicle, said belt tensioner comprising:
- a traction or thrust element for the transmission of a tensioning force onto the seat belt strap;
- and
- a force limiting unit for limiting the retaining force exerted onto a passenger by the seat belt strap;
- wherein,
- the force limiting unit comprises a functional element that is coupled to the traction or thrust element and is displaceable by a displaceable piston element in an effective direction of the tensioning force;
- a force transmission element is provided, for parallel application of the tensioning force onto the piston element and the traction or thrust element.
Dependencies are inferred from the claim text.