Patent ID: 6135903
Filing Date: 2000-10-24
Classification: B62M

Abstract:
Device for tensioning and guiding/derailing a chain (118) of a drive system with a set of gears (a-h) and also a set of chain rings (A, B, C), for a bicycle comprising synchronized selection means for a limited number of chain rings/gear pairs, comprising a rear derailleur (116) and a front derailleur (112), said rear derailleur comprising an arm (124) and a clevis (128) mounted for rotation relative to the arm with resilient return means therebetween, said clevis comprising a jockey wheel (132) and a tension wheel (134), characterized in that the chain (118) passes below the jockey wheel (132) and above the tension wheel (134), the return means for the clevis tending to move said clevis forwardly and upwardly.