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US 5,873,590 AGranted
Bicycle
AssigneeExedy Corporation
InventorsMinoru Abe, Naoki Tomiyama, Atsushi Ueda, Yasuhiko Eguchi, Koji Hiramoto
Life of this patent
Estimating the term…
Abstract
A bicycle is provided with a frame and a drive portion. The frame is at least partially hollow, and at least part of the drive portion is disposed in an interior of the frame. The drive portion includes a crank and a plurality of transmission means, in which one of the transmission means rotates another transmission means at a rotational speed higher than a rotational speed of the crank, which in turn rotates the rear wheel of the bicycle.
Claims9
A bicycle comprising:
- a frame having a drive case, said drive case mounted on said frame such that at least part of said drive case is disposed in an interior of said frame;
- a running portion, said running portion including a rear wheel mounted on a rear portion of said frame;
- and
- a drive portion, said drive portion including
- a crank rotatably supported on said drive case;
- a first transmission means disposed in said drive case;
- and
- a second transmission means;
- wherein said first transmission means rotates said second transmitting means at a rotational speed higher than a rotational speed of said crank, and said second transmission means rotates said rear wheel
- wherein said frame includes a hollow main frame defining at least part of said drive case;
- a rear end of said main frame includes a hollow seat stay bifurcated downward at an oblique angle therefrom;
- and said second transmission means is disposed in an interior of said seat stay.
9 more elements
Dependencies are inferred from the claim text.