Patent ID: 6629904
Filing Date: 2003-10-07
Classification: F16G

Abstract:
An endless metal belt to be trained around a pair of pulleys to transmit torque from one of the pulleys to the other, said endless metal belt comprising:a pair of layered ring structures each formed by superposing a plurality of metal rings in layers so as to be slidable relative to each other; and a plurality of metal blocks arranged along the length of the pair of layered ring structures and supported on the pair of layered ring structures so as to be slidable relative to the pair of layered ring structures; wherein at least one of said metal rings is provided with oil retaining grooves upon an inner circumferential surface thereof, and an inner circumferential surface of an innermost metal ring in sliding contact with a saddle surface of said metal blocks is a flat, smooth surface which is free from any oil retaining grooves, and wherein said saddle surface has a surface roughness not smaller than a surface roughness of said flat, smooth surface of the innermost metal ring.