Patent ID: 8834309
Filing Date: 2014-09-16
Classification: B62M

Abstract:
1. A multiple sprocket assembly for receiving a chain and transferring torque therefrom to a bicycle rear wheel hub rotatable about a hub axis, the chain including alternating pairs of inner and outer link plates connected by chain rollers, the multiple sprocket assembly comprising: a plurality of different-sized sprockets arranged coaxially about the rear wheel hub, the sprockets having a plurality of teeth and tooth roots spaced around a periphery of the sprockets for engaging the chain, the tooth roots forming a dedendum circle, the teeth having a first guide slope on a tooth back face facing an adjoining larger sprocket, the first guide slope extending from a tooth tip to the dedendum circle, the tooth tip having a second guide slope on the tooth back face and a third guide slope on a tooth front face facing an adjoining smaller sprocket, the second and third guide slopes meeting at a line defining a ridge therebetween.