Roller skate driven by up and down movement - has board with arms joined to wheels and connected by gear wheels

摘要

The roller skates (7) are moved by an alternating up and down movement produced by adjusting the weight of the user on the skates. The wheels (2, 2B) are fixed to mobile arms (1, 1B) whose movements are transferred by gear wheels (3). Pressure exerted vertically on the board causes the arms to separate, which moves the front wheels (2). The hubs of the front wheels have a ratchet (5) which allows them to continue to turn by inertia but only in the direction of movement of the skate.