| 摘要 |
A steering wheel has an integral arm (D) which extends from the rim (A) of the wheel, and is held in position by a lock (C), to prevent the wheel rotating. Access to the nut (B) holding the wheel to the steering column is blocked to prevent the wheel being removed. Further, when the arm is extended the steering wheel may become free spinning to prevent the vehicle being steered. Embodiments are described with more than one arm, where the wheel rim is split to expand, where an airbag is located within the wheel, and where the wheel rim can deform upon impact.
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