Household stepladder for e.g. straight staircase, has poles, retractable feet and movable lower part sliding in fixed upper part, where bolts traverse fixed and movable parts to adjust height per side based on number of steps to be spanned

摘要

The stepladder has a front part with retractable feet (1) blocked by cotters (5) which traverse the poles (A, B) and the feet by sliding from the height of a step through openings (8). The back part has a fixed upper part and a moveable lower part (2), and the cotters are retained by small chains (6). The part (2) slides in the fixed part and is blocked by bolts (3) pushed by a central spring (4). The bolts traverse the fixed and movable parts through the openings (9), of the part (2), for adjusting the height on each side according to the number of steps to be spanned.