초록 ▼

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-l

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.

대표청구항 ▼

A step apparatus comprising: a bracket; a step member; a pivotal interconnection between the bracket and step member; a spring connected between the bracket and step member urging the two together under force at the pivotal interconnection; and a cam surface carried by the step member, continuously

A step apparatus comprising: a bracket; a step member; a pivotal interconnection between the bracket and step member; a spring connected between the bracket and step member urging the two together under force at the pivotal interconnection; and a cam surface carried by the step member, continuously acting against the bracket under the force of said spring, and shaped to increase the spring force during pivoting of the step member relative to the bracket from both a folded and extended position.