| 摘要 |
<p>The safety wheel frame for vehicles has a crown (1) comprising a bent and welded metal tube which has two flattened areas with concave bases. These areas only affect the wheel crown's inside, but in no way alter the outer diameter of its cross section. The central parts of the flattened areas are separated by an angle of approx. 125 degrees and provide a support for the top ends (2a,2b) of the two spokes (2) for which they produce a maximum contact surface.</p> |
