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US 5,845,543 AGranted
Bicycle crank arm parts/assembly and assembly tools
AssigneeShimano Inc.
InventorMasahiro Yamanaka
Life of this patent
Estimating the term…
Abstract
A crank axle includes an axle body having first and second ends, a first rotary linkage member disposed at the first end of the axle body for nonrotatably fitting a first crank arm thereto, and a first centering structure disposed at the first end of the axle body in close proximity to the first rotary linkage member. The rotary linkage member may be formed as a plurality of splines, and the same structure may be formed at the second end.
Claims10
A one-piece bicycle crank axle comprising:
- a one-piece axle body having first and second ends defining respective first and second end faces (49A,49B), wherein the axle body is hollow throughout its entire length;
- a first rotary linkage member (51A) comprising a plurality of first splines (51a) disposed at and one-piece with the first end of the axle body;
- and
- a first centering structure (52A) disposed at and one-piece with the first end of the axle body in close proximity to the first rotary linkage member (51A);
- a second rotary linkage member (51B) comprising a plurality of second splines disposed at and one-piece with the second end of the axle body;
- and
- a second centering structure (52B) disposed at and one-piece with the second end of the axle body in close proximity to the second rotary linkage member (51B).
4 more elements
Dependencies are inferred from the claim text.