Patent ID: 9290235
Filing Date: 2016-03-22
CPC Classification: B62M

Claim Text:
1. A bicycle derailleur comprising: a base member configured to be mounted to a bicycle; a movable member movably coupled to the base member; a chain guide pivotally coupled to the movable member to rotate around a rotational axis with respect to the movable member, the chain guide including a guide pulley rotatably arranged on the rotational axis; a biasing element biasing the chain guide in a first rotational direction around the rotational axis, the biasing element being at least partially disposed inside of the guide pulley; an inner member that is fixed to the chain guide and configured to rotatably support the guide pulley and at least partially house the biasing element, the inner member including an inner tubular portion, an outer tubular portion disposed radially spaced apart from the inner tubular portion, and an end wall that connects the inner tubular portion to the outer tubular portion; a rotational resistance structure operatively arranged between the movable member and the chain guide to frictionally provide rotational resistance to the chain guide around the rotational axis in a second rotational direction which is opposite to the first rotational direction, the rotational resistance structure applying the rotational resistance at an area disposed radially outward of the biasing element with respect to the rotational axis; and a one-way clutch operatively arranged between the rotational resistance structure and the chain guide, the one-way clutch allows the chain guide to pivot around the rotational axis in the first rotational direction, and the one-way clutch locks up when the chain guide pivots in the second rotational direction with respect to the movable member.