A seatbelt retractor includes a base, a spool, a cylinder 55, and a cylinder lock. The spool is rotatably coupled to the base and has a piston portion 70. The cylinder is engaged with the piston portion and therewith defines a first chamber 88. The piston portion is movable to change the chamber volume. The cylinder lock in a first condition rotatably fixes the cylinder to the base. Damping fluid 110 is disposed in the chamber. The piston portion and the cylinder may be centered on the spools axis of rotation 63, and may be in threaded engagement with each other. The cylinder lock may include a plurality of clutching teeth 90 on the outer circumference of the cylinder and a mechanism fixed to the base for engaging the teeth. The damping fluid may be a heterogeneous mixture including hydrophobic nanoporous particles and a liquid. The particles may be formed of silica particles with a hydrophobic surface treatment. The retractor may further include a supplementary capsule fixed to the cylinder to define a second chamber with an aperture disposed between the first and second chamber (see figures 13 and 14). A valve may be disposed over the aperture.


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    Title :

    Load limiting seatbelt retractor



    Publication date :

    2019-01-02


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR



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