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US 8,522,931 B2Granted
Disk brake rotor
AssigneeShimano Inc.
InventorsMakoto Souwa, Toru Iwai
Life of this patent
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Abstract
A disk brake rotor includes a first rotor portion, a second rotor portion and a third rotor portion. The second rotor portion has an annular portion and at least one ventilation hole. The third rotor portion also has an annular portion. The first portion is attached to and disposed between the second rotor portion and the third rotor portions, such that a surface of the first rotor portion is an exposed area exposed by the at least one ventilation hole.
Claims13
A disk brake rotor comprising:
- a first rotor layer having a surface that extends in a direction perpendicular to a rotational axis thereof;
- a second rotor layer having an annular portion and at least one ventilation hole;
- and
- a third rotor layer having an annular portion,
- the first rotor layer being attached to and disposed between the second rotor layer and the third rotor layer with a portion of the surface of the first rotor layer having an exposed area that is exposed by the at least one ventilation hole.
2 more elements
Dependencies are inferred from the claim text.