Universal perambulator consists of cradle with four wheels connected in pairs to parallel axles, and levers interconnected and connected to cradle and axles by joints

摘要

The universal perambulator consists of a cradle (3) with four wheels connected in pairs to parallel axles (1,2). Levers (5-7), the cradle and axles are interconnected by joints and the angle between the cradle and one (6) of the levers equals from 100 to 120 degrees if the chassis is located on adjacent steps of stairs.