Yamaha Hatsudoki Kabushiki Kaisha

Takeshi Nagase

Junji Terada

Yoshiharu Yokoyama

Hideo Kohda

Izumi Yamashita

Ikuo Okamoto

Atsushi Koizumi

Kazuo Terai

An electrically-powered scooter including a front wheel, a rear wheel and a frame assembly. A handlebar assembly and a seat assembly are supported by the frame assembly. The frame assembly includes a left frame rail and a right frame rail spaced laterally from one another and extending between the handle bar assembly and the seat assembly. A battery support extends between the left and the right frame rails at a position intermediate the handle bar assembly and the seat assembly. A battery is supported by the battery support. In one arrangement, the battery support includes an enclosure defining a battery storage chamber. The enclosure includes a guide member configured to engage a guide recess of the battery to guide the battery into the battery storage chamber. In another arrangement, the battery may include a recharging port, an axis of which defines an oblique angle with an axis of the battery.

Battery mounting arrangement for electrically powered vehicle

Several embodiments of prime mover-assisted pedal-operated vehicles, such as a bicycle. In each embodiment, both the prime mover and the pedal mechanism drive the rear wheel through a common transfer shaft. The transfer shaft is disposed vertically above the pedal-operated crankshaft axis so as to improve the ground clearance and simplify the overall construction of the bicycle. The transmission arrangement is such that the prime mover transmission ratios are always in a step-down condition while the pedal-operated crankshaft drives the transfer shaft through a step-up transmission. Various embodiments of improved torque sensors are also employed so as to provide smooth transition and smooth feel to the rider.

Power assisted bicycle

Motorcycle having a head pipe for mounting a front fork assembly for movement about a steering axis which is inclined rearwardly with respect to a vertical line to define a caster angle. The front fork assembly has an axis which is inclined rearwardly with respect to a vertical line by an angle smaller than the caster angle. The front fork assembly supports the front axle along the front side at a position upwardly distant from the lower end thereof.

Motorcycle having a leading axle type front fork assembly

Growing community of inventors

Iwata, Japan

Takeshi Nagase