Rollator auxiliary wheel for overcoming obstacles, such as curbs and stairs, has four planetary wheels placed on auxiliary wheel, and additional free movable wheel mounted next to front wheels, which has smaller diameter than main wheel

摘要

The rollator auxiliary wheel has four planetary wheels placed on the auxiliary wheel, and an additional free movable wheel mounted next to the front wheels of the rollator, which has a smaller diameter than the main wheel. The planetary wheels are freely rotatable and overlap the diameter of the main wheel around 10 to 20%. The auxiliary wheel is freely movable on the main axis.