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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Zusammenfassung: | 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 further roller (17). The board can be lifted by a predetermined angle at its free end through the pretension of the arched spring board. A tension element (23) such as a flexible belt for transferring weight through drive force is mounted in the chord area of the arch of the unstressed spring board so that when the spring board is flattened through the user shifting his weight the tension element produces and transfers the desired drive force. the apex of the arched spring board in the unstressed state is roughly in the middle between the two ends of the board.
Ein Sportgerät und insbesondere ein Skateboard verfügt über ein Trittbrett (20) mit mehreren Laufrädern (17, 18), wobei vorzugsweise die vorderen Laufräder (18) des Skateboards (13) an einem Federbrett (21) befestigt sind. Das Federbrett kann bei einer Belastung durch die Füße (11, 14) des Benutzers, ausgehend von einer gekrümmten Gestalt, zunehmend flacher gedrückt werden. Beim Zusammendrücken des Federbrettes (21) vergrößert sich der Abstand zwischen den Laufrädern (17, 18). Die Dabei entstehende Zugkraft auf ein flexibles Band (23) wird in einem Getriebe in eine Vortriebskraft für die Laufräder (17) umgewandelt. |
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