Patent ID: 6612514
Filing Date: 2003-09-02
Classification: B60R

Abstract:
A rotary tensioner for a safety belt, comprising:a belt retractor having a belt retraction spool; and a drive means for rotating said spool in a belt retracting direction upon actuation of said tensioner, wherein said drive means comprises a drive wheel, which is provided with external teeth, for said spool, and further comprises a housing that extends about at least a portion of a periphery of said drive wheel and has a channel for conducting therethrough inertia elements that are loosely disposed in said channel and that upon actuation of said tensioner are accelerated in said channel and come into engagement with said external teeth of said drive wheel, and wherein, for a synchronous and shape-congruent introduction of said inertia elements into said external teeth of said drive wheel, said drive means also comprises a shaped element that comprises as a finder element, a first inertia element having only a partial contour of a complete inertia element, wherein said partial contour is adapted to said external teeth of said drive wheel, and wherein said shaped element also comprises a complete second inertia element that is monolithically connected to said first inertia element via a connecting rib.