Patent ID: 7429012

Claim:
A self stopping seat belt retractor, comprising: a belt shaft ( 12 ) for winding a seat belt thereonto and unwinding a wound seat belt therefrom; a housing ( 10 ) rotatably supporting the belt shaft ( 12 ) and having a blocking device ( 23 ) that includes at least one blocking means ( 25 ) for the belt shaft ( 12 ) that can be controlled in a vehicle sensitive and/or belt sensitive manner into engagement with a toothed gearing system on the side of the housing and having at least one block lever ( 21 ); a drive device ( 51 ); and a tightening device releasable upon the occurrence of a specified event to initiate blocking of the belt shaft ( 12 ) against further rotation thereof in the seat belt unwinding direction, the tightening device operating on the belt shaft ( 12 ) and including a drive wheel ( 13 ) that can be set into rotation via the drive device ( 51 ), the drive wheel being connectable upon release of the tightening device with the belt shaft ( 12 ), whereby the drive wheel ( 13 ) of the tightening device is connectable via the blocking device ( 23 ) with the belt shaft ( 12 ) for the transmission of force to the belt shaft and the drive wheel ( 13 ) is, prior to the release of the tightening device, secured in a force-transmitting manner on the housing ( 10 ) of the seat belt retractor, the drive wheel ( 13 ) having an inner toothed gearing system ( 40 ) that is oriented for engagement by the blocking means ( 25 ) of the blocking device ( 23 ) secured on the belt shaft ( 12 ) and that operates as a blocking toothed gearing system and an outer toothed gearing system ( 20 ) for engagement with the at least one block lever ( 21 ) on the housing ( 10 ) that is maintained, via yielding under the bias of a spring, in engagement with the outer toothed gearing system ( 20 ), whereby, via the rotation of the drive wheel ( 13 ) that is effected by the release of the tightening device, the drive wheel ( 13 ) is releasable from the housing ( 10 ) and is connectable with the belt shaft ( 12 ) in a force-transmitting manner via the blocking means ( 25 ) of the blocking device, and wherein the drive wheel ( 13 ) is directly connectable with the belt shaft ( 12 ) via the blocking means ( 25 ) of the blocking device ( 23 ).