Yamaha Hatsudoki Kabushiki Kaisha

Hiroshi Yamaoka

Shidehiko Miyashiro

Yasuyuki Muramatsu

Takehisa Katsura

Takushiro Shiraishi

Takayoshi Fukuda

Sin Yokomizo

Norikazu Unno

Mitsuhiro Okada

In a body frame for a motorcycle mounted with an engine unitand provided with a main frameby which a front forkand rear armsare supported, the main frameincludes: a head pipe unitwhich extends obliquely downward to a rear of a vehicle from a head pipeand so as to expand in a vertical direction; a down framewhich is connected to a front part at lower end of the head pipe unit; and left and right rear arm bracketswhich are stretched and connected to a rear end of the down frameand a rear part at lower end of the head pipe unit, and the head pipe unitis an aluminum die-cast molded product, and the down frameand the left and right rear arm bracketsare aluminum forged molded products.

Vehicle body frame for motorcycle

A number of embodiments of wheel locks for vehicle wheels having an opening are disclosed. In each embodiment, the lock includes a plurality of pivotally connected elongated members having end members that are provided with a locking means for locking them together. As a result, the lock can be inserted through the wheel and around a fixed object and locked like a chain. Various embodiments are disclosed for protecting the pivot pins of the pivotal connections from attack and for restraining the pivotal movement of the elongated members. In some embodiments, the pivotal movement is restrained by placing a frictional drag on the components so that the elements cannot freely pivot. In other embodiments the degree of pivotal movement in one direction is limited more than in another direction so that the lock can only be installed in the correct relationship.

Vehicle wheel lock

Growing community of inventors

Shizuoka-ken, Japan

Hiroshi Yamaoka