Patent ID: 6761655
Filing Date: 2004-07-13
Classification: B62M

Abstract:
A sensor assembly for a bicycle sprocket assembly having a plurality of sprockets disposed on a sprocket mounting sleeve that is rotatably supported relative to an axle so that the plurality of sprockets rotate with the sprocket mounting sleeve, wherein the sensor assembly comprises:a sensor retainer structured to mount to the sprocket mounting sleeve laterally outwardly of the plurality of sprockets and to rotate coaxially with the plurality of sprockets relative to the axle; wherein the sensor retainer has an outer peripheral surface, and wherein the entire outer peripheral surface is free of sprocket fixing structures that are adapted to directly and independently fix sprockets to the sensor retainer without being directly attached to at least one of the plurality of sprockets so that the sensor retainer may be separated from the plurality of sprockets while leaving the plurality of sprockets on the sprocket mounting sleeve; a first sensor element coupled for rotation with the sensor retainer; and a second sensor element for attachment in close proximity to the sensor retainer so that the sensor retainer rotates relative to the second sensor element.