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US 4,887,687 AGranted
Motorcycle frame
AssigneeHonda Giken Kogyo Kabushiki Kaisha
InventorsSusumu Asai, Haruhide Sugimoto, Masaru Fujisaki, Tadatoshi Shigetomi, Hisatoshi Kobayashi
Life of this patent
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Abstract
A motorcycle frame is cast in two parts which are bolted together along the longitudinal centerline of the motorcycle. The frame has a transverse section in the form of an inverted "U", the space defined by the "U" being arranged to receive a motorcycle engine. An upper wall provides a separating partition between a fuel tank and the engine for defining a longitudinal space of reduced transverse sectional area towards the rear of the frame.
Claims19
A vehicle body frame for a motorcycle comprising:
- a casting frame including a main frame portion for supporting an engine;
- said casting frame being divided into a right and a left structure;
- and
- said right and left structures being joined about a center line of the vehicle body for forming a vehicle body frame having a generally U-shaped configuration wherein the open portion of the U-shaped configuration is formed to open downwardly;
- and
- a downwardly projecting portion depending from said main frame portion, wherein said downwardly projecting portion supports the engine.
3 more elements
A vehicle body frame for a motorcycle comprising:
- a cashing frame including a main frame portion for supporting an engine;
- said casting frame being divided into a right and left structure;
- said right and left structures being joined about a center line of the vehicle body for forming a vehicle body frame having a generally U-shaped configuration wherein the open portion of the U-shaped configuration is formed to open downwardly;
- and
- a rear swing arm supporting portion having a plurality of reinforcing ribs;
- said ribs being positioned for increasing the strength of said rear swing arm and being disposed to be densely arranged in at least an area adjacent to the rear swing arm supporting portion.
3 more elements
Dependencies are inferred from the claim text.