MULT-PURPOSE LADDER WITH IMPROVED RUNGS

摘要

A multi-purpose ladder with improved rungs has two ladder sections, and each of the ladder sections comprises two inner rails attached with inner rungs and two outer rails attached with outer rungs. Each of the inner rungs is composed of an upper rung member, a square pipe shaped intermediate rung member, and a lower rung member. The upper rung member and the lower rung member each have a slant pedal section and two support sections. The two support sections join the upper and lower side of the intermediate rung member and the slant pedal section. The slant pedal section inclines an angle corresponding to the outer rungs such that the inner rungs provide strong strength for being stepped on.

主权项

1. A multi-purpose ladder comprising:
two ladder sections, and two articulated joints joining to the ladder sections; wherein each of the two ladder section further comprises: two rectangle pipe shaped inner rails attached with a plurality of inner rungs, and each of the inner rails having a side with two corners facing to each other; two channel shaped outer rails with a plurality of trapezoidal pipe shaped outer rungs corresponding to the two inner rails, and each of the outer rungs having an upper outer slant pedal side and a lower outer slant pedal side; wherein each of the inner rungs is composed of an upper rung member, a square pipe shaped intermediate rung member, and a lower rung member; the intermediate rung member has two ends attached to the inner rails, and two opposite sides joining the upper rung member and the lower rung member respectively; the upper rung member and the lower rung member each have a slant pedal section, a first support section and a second support section; the slant pedal section has a first lateral side and a second lateral side opposite to each other; the first support section has two opposite lateral sides with one of the lateral sides joining the intermediate rung member and the other lateral side joining the slant pedal section along a first inclining an angle; the second support section is disposed beside the first support section and has two opposite lateral sides with one of the lateral sides joining the intermediate rung member and the other one of the lateral sides joining the slant pedal section along a second inclining an angle.