Patent ID: 11906016
Assignee: MITSUBOSHI BELTING LTD.
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F  C | IPC C  F

Claim 11:
12. A method for reducing torque loss of a belt power-transmission apparatus, the method comprising:
hanging a V-ribbed belt on a pulley, the V-ribbed belt comprising:
a plurality of V-rib portions extending along a longitudinal direction of the V-ribbed belt and in parallel with one another; and
a compression rubber layer comprising a frictional power transmission face at least a part of which is configured to come into contact with a V-rib groove portion of the pulley,
wherein the frictional power transmission face of the compression rubber layer is formed from a vulcanizate of a rubber composition containing a rubber component and a noise suppression improver,
a difference between a curvature radius of a rib top end of the pulley and a curvature radius of a rib bottom portion of the V-ribbed belt is −0.08 to 0.08 mm, and
wherein the pulley includes a pulley having an outer diameter of 65 mm or smaller.