| 摘要 |
PROBLEM TO BE SOLVED: To provide a twin bicycle of a two-seater four-wheeler composed of two bicycles both equipped with an interlocking type rear wheel brake and a shift or a transmission, flexibly and detachably connected each other in parallel. SOLUTION: The twin bicycle is equipped with an interlocking type rear wheel brake system in which independent rear wheel brake systems with no interlocking characteristic of the two bicycles are connected each other through a brake wire of an interlocking brake lever, and the rear wheel brakes of both bicycles are simultaneously or independently operated by the operation of rear wheel brake levers by a rider of any of the bicycles, and with an interlocking type shift system of substantially the same constitution. A problem and danger in traveling of a conventional four-wheel bicycle equipped with the independent rear wheel brake system are eliminated, which enables safety and comfortable travel. COPYRIGHT: (C)2004,JPO
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