US 6,386,329 B1 · Bicycle brake shoe

Abstract

Bicycle brake shoes are provided for a bicycle braking device. The brake shoes are pressed into contact with a bicycle wheel rim to apply a braking force thereto. The brake shoes are coupled to the bicycle braking device by brake shoe holders. Each brake shoe includes an attachment portion coupled to the brake shoe holder and a rim contacting portion for contacting the side braking surface of the rim. The brake shoes are formed from a non-sulfur cross-linked polymer such as butadiene rubber (BR) or acrylonitrile-butadiene rubber (NBR) being cross-linked with zinc methacrylic acid. In the preferred embodiment, the rim contacting portion is further formed by cross-linking the butadiene rubber or acrylonitrile-butadiene rubber with a binder such as peroxide. The brake shoe is elongated in the rotation direction of the wheel rim and has a braking surface opposite to the braked surface of the rim.

Claims18

Dependent claims

A bicycle brake shoe comprising:

an attachment portion;
and
a rim contacting portion fixedly coupled said attachment portion, said rim contacting portion having a braking surface formed from a polymer selected from the group consisting of butadiene rubber and acrylonitrile-butadiene rubber, said polymer being cross-linked with zinc methacrylate and peroxide, said rim contacting portion further being formed with at least one of stearic acid, zinc stearate, calcium stearate, alumina, paraffin wax and barium sulfate.

Dependencies are inferred from the claim text.

Bicycle brake shoe

Life of this patent

Bicycle brake shoe

Life of this patent

Abstract

Claims18