US Patent 7749086 Propeller shaft

In a state in which a dynamic damper and paper dampers are installed to an inner portion of a first propeller shaft, there is provided a structure in which inclined end portions in an inner side in a diametrical direction of the paper dampers opposing to an inner weight of the dynamic damper are positioned in such a manner as to be largely away from the inner weight. Accordingly, since an offset space can be formed between the inclined end portions of two paper dampers and an end portion in an axial direction of the inner weight of the dynamic damper, it is possible to avoid a contact between both the elements.