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US 6,712,394 B2Granted
Belt tensioner
AssigneeTRW Occupant Restraint Systems GmbH & Co. KG
InventorsHans-Peter Betz, Wolf-Dieter Hönl
Life of this patent
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Abstract
A tensioner for a safety belt includes a cylinder, a piston which is slidably arranged within the cylinder, and a traction transfer element which is connected with the piston to transfer a movement of the piston to the safety belt. The tensioner further includes a drive which may exert a driving force on the piston to tension the safety belt. The piston is provided with a deformation element which the traction transfer element engages.
Claims6
A tensioner for a safety belt, said tensioner comprising:
- a cylinder,
- a piston which is slidably arranged within said cylinder,
- a traction transfer means which is connected with said piston to transfer movement of said piston to said safety belt, and
- a drive for exerting a driving force on said piston to tension said safety belt,
- said piston including a deformation means which said traction transfer means engages,
- said deformation means being stable enough to withstand being plastically deformed when said driving force acts on said traction transfer means and being plastically deformed when a restraint force exceeding said driving force is acting on said traction transfer means, said deformation means comprises a deformation tube connected with said piston and a displacement member connected with said traction transfer means, said displacement member penetrating said deformation tube when a restraint force exceeding said driving force acts on said traction transfer means.
3 more elements
Dependencies are inferred from the claim text.