Wheel rim for a bicycle
AssigneesBridgestone Corporation, Bridgestone Cycle Co., Ltd.
InventorsYoshihiko Fujii, Bunji Mutoh, Yoshitaka Tamura, Kiyofumi Hirai
Life of this patent
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Abstract
A wheel rim for a two-wheeled vehicle has a spray coated metallic and/or ceramic layer covering at least a part of a rim surface with which a brake shoe is brought into contact when a brake is applied.
Claims5
A wheel rim for a bicycle with a brake shoe comprising a rim made of one of aluminum and stainless, and a layer directly spray-coated on the rim at a portion where the brake shoe contacts when stopping rotation of the wheel, said layer being formed of only ceramic materials and having a polished surface, the average roughness being 2.0-3.5 micra.
A wheel rim for a bicycle with a brake shoe, comprising,
- a rim,
- a layer spray coated on the rim at a portion where the brake shoe contacts when stopping rotation of the wheel, said layer including an outer layer formed of ceramic material selected from the group consisting of Al.sub.2 O.sub.3, a composite of Al.sub.2 O.sub.3 and TiO.sub.2, TiO.sub.2 and WC, said outer layer being directly spray-coated on the rim to have thickness from 50 to 150 micra and then polished so that an average roughness is between 2.0 and 3.5 micra, whereby wheel locking due to excessive braking action and an excessive wear of the brake shoe are prevented, and
- a corrosion inhibitor applied on the outer layer to prevent rust of the wheel rim, said corrosion inhibitor being selected from a group consisting of a rust preventing agent, a rust preventing oil and a water repellent.
Dependencies are inferred from the claim text.