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US 8,756,814 B2Granted
Method of manufacturing a bicycle rim
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.
Claims5
A method of manufacturing a bicycle rim comprising:
- forming an outer rim portion having a ring shape from a first material;
- forming an inner rim portion having a cylindrical ring shape from a plate of a second material by rounding the plate of the second material while also simultaneously spinning the plate, and subsequently coupling circumferential ends of the plate together to form the cylindrical ring;
- and
- joining the outer and inner rim portions together to form the bicycle rim.
1 more element
Dependencies are inferred from the claim text.