Patent ID: 9228643
Filing Date: 2016-01-05
CPC Classification: B62M,F16H

Claim Text:
1. A chain tensioning device comprising: a main body having a first end and a second end, the first end being configured to be mounted to a bicycle; a chain guide including at least one chain cage plate and at least one pulley, the at least one chain cage plate being pivotally coupled to the second end of the main body to rotate around a rotational axis with respect to the main body; and a rotary fluid damper unit operatively connected between the main body and the chain guide to provide rotational resistance to the chain guide around the rotational axis, the rotary fluid damper unit including an outer member defining a fluid cavity and an inner member at least a portion of which is rotatably disposed within the fluid cavity of the outer member, one of the outer member and the inner member being detachably mounted on the main body and the other of the outer member and the inner member being non-rotatably coupled to the chain guide, the outer member and the inner member being separate pieces from the main body and the chain guide.