Hand propelled vehicle e.g. pram - has wheels mounted on pivoted arms allowing tracks to be used on rough ground or steps

摘要

The hand-propelled vehicle has, in addition to wheels, one or more continuous tracks for use over rough ground, or steps. By raising the wheels, which are on pivoted arms, the tracks come into contact with the ground. The end rollers (5) for the track (4) rotate in bearings fixed to the frame (10). The quadrants (12) have remotely controlled locks (11) for locking the wheels in the raised or lowered position. The quadrant (28) is for adjusting the inclination of the vehicle body (30).