Device for manually raising or lowering a load to assist overcoming obstacles, and load including a device of that kind

A device capable of manually raising or lowering a means for transporting a load to assist overcoming obstacles, characterized in that it includes:

• at least one arm automatically articulated about an articulation attached to the means for transporting the load between a first position retracted by the weight of the load in which said device is integrated into a lower part of the means for transporting the load and a second position deployed by the action of an elastic element,
• at least one main wheel constrained to rotate with the arm on the side opposite the articulation,
• a damping system capable of storing energy, damping shocks and automatically returning the arm into the deployed second position when the means for transporting the load is at least in part raised by the user to overcome an obstacle, and
• a system configured to prevent rubbing the means for transporting the load against the obstacle to be overcome and damage thereto, said system including at least one secondary wheel or a crimped ball constrained to rotate with the free end of the arm on the side opposite the articulation.