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US 2012/0193971 A1Published application
Bicycle rim and method of manufacture thereof
AssigneeShimano Inc.
InventorEtsuyoshi WATARAI
Life of this patent
Estimating the term…
Abstract
A bicycle rim is basically provided with an outer rim portion and an inner rim portion. The outer rim portion has a ring shape of a first material. The inner rim portion is joined to the outer rim portion. The inner rim portion has a ring shape of a second material with an internal residual stress distribution resulting from the ring shape being formed by spinning of the second material.
Claims14
A method of manufacture a bicycle rim comprising:
- forming an outer rim portion having a ring shape from a first material;
- forming an inner rim portion having a ring shape from a second material by spinning of the second material;
- and
- joining the outer and inner rim portions together.
1 more element
A bicycle rim comprising:
- an outer rim portion having a ring shape of a first material;
- and
- an inner rim portion joined to the outer rim portion, the inner rim portion having a ring shape of a second material with an internal residual stress distribution resulting from the ring shape being formed by spinning of the second material.
Dependencies are inferred from the claim text.