Patent ID: 6336885
Filing Date: 2002-01-08
Classification: B29D,F16G

Abstract:
A V-ribbed belt in which a cord is embedded generally in a helical arrangement to form a row along the belt width and a plurality of ribs of approximately trapezoidal section are formed on each of bottom and back faces of the belt and in corresponding positional relation between the bottom and back faces to extend in parallel with each other along the belt length,wherein the ribs in both the bottom and back faces are made of rubber of identical characteristic and formed in approximately identical size and shape, and the cord is disposed substantially in the middle of the belt thickness, wherein a top of the rib comprises a planar top surface along the belt width and a pair of right and left corners with one end continuing to a left or right end of the top surface and the other end continuing to a side face of the rib, both the corners are formed in respective arcuate sections having different centers of curvature positioned bilaterally with respect to the centerline of the rib, and when the height of the rib is hr and the curvature radius of the corner of the rib is R, the curvature radius R is set to meet the following formula: 0.17 hr&lE;R<0.5 hr.