Skateboard has on underneath of tread board a spring board arched in unstressed state and connected to rollers to lift front end of board until flattened to transfer drive force through a tension belt
The skateboard has a tread board (20) and several rollers. On the side of the board remote from the tread surface there is a spring board (21) which is arched in the unstressed state and which has a roller (18) at its free end (22) but is connected to the board at its other end where there is a furt...
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| Format: | Patent |
| Sprache: | eng ; ger |
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