Autoliv Development Ab

Autoflug Gmbh & Co. Fahrzeugtechnik

Thomas Schmidt

Martin Schmidt

Michael Pech

Christian Fischer

Matthias Steinberg

Tobias Voss

Klaus Werner Butenop

Frank Fugel

Simone Mesecke-Rischmann

Stefan Suhr

Thomas Schneider

Rene Rade

Stefan Bösch

Jorg Barckmann

Kay Löffler

Michael Grabinski

A piston for a pretensioner device () for a motor vehicle seat belt system of a type having a gas generator () with the piston () guided in a tube () that closes a pressure space () in the tube (). The pressure space () can be pressurized by the gas generator (), driving the piston () to undergo pretensioning operation transmitted to the seat belt system by a force transmission means. The piston has a dome shaped front side adapted to engage a force transmission element and a skirt forming a sealing lip oriented toward the pressure space. At least one slot is formed in the outer surface of the piston extending axially from the sealing lip. The slot can be enlarged by the material erosion caused by the pressure and/or pressure conditions in the pressure space produced by gas from the gas generator.

Pretensioner device for a seat belt

A tensioning device () for a seat belt, in particular in a motor vehicle, having a gas generator () and a piston () guided in a tube () that closes a pressure space () in the tube (), whereas the pressure space () can be pressurized by the gas generator (), as a result of which the piston () can be driven to perform a tensioning operation which can be transmitted to the seat belt by means of the force transmission means. The piston () having a closed or constricted opening (), and the opening () can be enlarged and/or opened by the material erosion caused by the pressure and/or pressure conditions in the pressure space ().

Tensioning device for a safety belt

A pretensioning device () for a safety belt, of a motor vehicle, having a gas generator (), a piston () guided in a tube (), which closes a pressure area () in the tube () that is pressurized by the gas generator () whereupon the piston () is able to move in a pretensioning movement which is able to be conveyed to the safety belt by means of an inertia body () resting on a front face () of the piston (). The piston () forms a pass-through opening () releasable upon exceeding of a predetermined pressure and a recess () is provided in the front face () with an inertia body () resting thereon, so that a flow connection is created from the pass-through opening () to the area () located behind the piston () in the direction of the pretensioning movement (S).

Pretensioning device for a safety belt

A self stopping seat belt retractor is provided with a belt shaft for winding a seat belt thereonto and unwinding a wound seat belt therefrom and a housing rotatably supporting the belt shaft and having a locking device that includes a locking means for the belt shaft that can be controlled in a vehicle sensitive and/or belt sensitive manner into engagement with a toothed gearing system on that side of the housing. A tightening device operating on the belt shaft includes a drive wheel, which is, prior to the release of the tightening device, secured in a force-transmitting manner on the housing, is connectable upon release of the tightening device with the belt shaft, whereby the drive wheel of the tightening device is connectable via the locking device with the belt shaft for the transmission of force to the belt shaft.

High performance tightener

A safety belt arrangement includes a controllable blocking apparatus that is controlled sensitive to the vehicle and/or to the safety belt. A safety belt buckle is provided and a tensioning apparatus is inserted in the safety belt arrangement, such that the tensioning apparatus, when triggered, eliminates the slack in the belt. The arrangement also includes a continuously working device for limiting the force exerted on the safety belt by the forward displacement of the belted occupant.

Safety belt system with a pretensioning device and AP force limiter

Belt winding and tightening combination with a force limiter

Mass-body drive for a rotary tightening device

A self-locking safety-belt reeling device has a reeling shaft on which a safety-belt is wound. A blocking device that is controlled by at least a vehicle-sensitive control mechanism and/or a safety-belt-sensitive control mechanism for blocking the safety-belt reeling shaft is provided. A tightening device acting on the reeling shaft comprises a tightener coupling. The tightening device further has a drive disk. The drive disk, upon activation of the tightening device, is driven in rotation by a drive device and coupled with the tightener coupling to the reeling shaft. A power limiter is connected to the safety-belt reeling device for limiting removal of the safety belt, whereby the power limiter is activated and deactivated depending on the operational states of the safety-belt reeling device and the tightening device. The power limiter during blocking of the safety belt reeling device is inactive and is activated only after completion of a tightening movement of the safety belt. Preferably, the power limiter is a torsion rod.

Safety belt reeling device and safety belt tightening device combination

A tensioning mechanism for a safety belt reel-in mechanism, including a cable drive that is activatable in the event of a crash and includes a cable pulley that is adapted to be positively coupled with the belt reeling-in shaft of the reel-in mechanism via a locking member that is disposed on the cable pulley and is radially shiftable for meshing with coupling teeth provided on a toothed ring of the belt reeling-in shaft. To assure a more reliable tooth engagement in every phase of the tensioning movement, the cable pulley is provided with a support arrangement that is adapted to rest against the tooth ring of the belt reel-in mechanism and that extends into a plane formed by the locking member and the coupling teeth.

Growing community of inventors

Timmendorfer Strand, Germany

Thomas Schmidt