| 摘要 |
<p>Folding Foot Step A new and improved folding step especially useful on trucks or rail transit vehicles. The folding step includes a support bracket, a step member pivoted to the bracket, and a spring urging the two together and into one of two pivoted positions. The step member has parallel arms that straddle a box-like portion of the bracket. Stub shafts extend from the arms into the bracket through slots and carry cams that are urged into contact with the bracket by the spring. The cams and spring provide an over-center snap action between the step member and bracket.</p> |
