One-way transmission device for a hub of a rear wheel of a bicycle, pawl carrying body for such device and hub comprising such device

Abstract

A one-way transmission device for a hub of a rear wheel of a bicycle is presented. The device has a pawl carrying body and a plurality of pawls housed in respective seats formed on a pawl carrying body. The pawls are made of a material having high structural resistance, such as for example steel or titanium, while the pawl carrying body is made of a material that is lighter in weight than that of the pawls, for example an aluminum alloy. In this way, a device is obtained that is lighter in weight than that of the prior art. To reduce to a minimum the wear due to abrasion caused by slight rotation movements of the pawls in the seats, contacting means made of a wear resistant material are inserted between each pawl and its respective seat. In a first embodiment, such contacting means comprises a pawl housing shell made of steel or titanium and integrally associated with the respective seat. In a second embodiment, the contacting means comprises a wear resistant coating layer applied on the respective seat by means of a surface deposition process.

Dependencies are inferred from the claim text.