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US 4,226,296 AGranted
Frame of motorcycles
AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorKazuo Higaki
Life of this patent
Estimating the term…
Abstract
A motorcycle frame has a steering head to which a pair of upper and a pair of lower tubes are welded. The tubes extend rearwardly, the members of each pair being spaced apart from one another. They are interconnected at the rear. The lower tubes are spaced apart to receive and suspend a motorcycle engine, the engine being insertable into and removable from, said frame through the bottom of the frame. Conveniently, seat rails can be attached to the frame.
Claims9
A motorcycle frame for dependently supporting an engine, comprising:
- a forward steering head;
- a pair of laterally spaced-apart upper tubes;
- a pair of laterally spaced-apart lower tubes, the forward end of each of the tubes being welded to the steering head, the rearward ends of the upper tubes, the lower tubes being welded to the upper tubes at locations spaced forwardly from the rearward ends of the rear portions of the upper tubes being downwardly bent, the intermediate portions of the lower tubes being laterally spaced-apart sufficiently to receive and embrace said engine;
- at least one upper connector tube laterally interconnecting said upper tubes;
- at least one lower connector tube laterally interconnecting said lower tubes, the frame being devoid of structure which can interfere with the entry of said engine between said intermediate portions;
- and bracket means on said frame for dependently suspending said engine between said intermediate portions.
3 more elements
Dependencies are inferred from the claim text.