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US 10,520,052 B2Granted
Bicycle disc brake rotor
AssigneeShimano Inc.
InventorsToru Iwai, Makoto Souwa
Life of this patent
Estimating the term…
Abstract
A bicycle disc brake rotor is provided with a base rotor plate and a surface region. The base rotor plate includes an outer portion that is formed of iron. The outer portion has first and second base surfaces facing in opposite axial directions. The surface region is formed by a diffusion process on the base rotor plate. The surface region has a corrosion resistant characteristic which is superior to the base rotor plate.
Claims9
A bicycle disc brake rotor comprising:
- a base rotor plate including an outer portion formed of iron, the outer portion having first and second base surfaces facing in opposite axial directions;
- and
- a surface region formed by a diffusion process on the base rotor plate, the diffusion process being a calorizing process, and the surface region having a corrosion resistant characteristic which, is superior to the base rotor plate, and including a calorized zone comprising an alloy consisting of aluminum and iron, and the calorized zone being chemically infiltrated into the first and second base surfaces and at least one peripheral edge of the outer portion;
- wherein the base plate comprises an inner portion comprising steel, the outer portion surrounding an entirety of the inner portion.
1 more element
Dependencies are inferred from the claim text.