Patent ID: 6485384
Filing Date: 2002-11-26
Classification: B41J,F16G,F16H

Abstract:
A toothed belt comprising:a belt main body with a pitch line on which a tensile member is embedded therein; a plurality of belt tooth portions provided at a fixed pitch on a land line of said belt main body; each of said belt tooth portions comprising: tooth root portions formed of circularly arcuate surfaces which are arranged symmetrically with each other in respect to a centerline in the tooth width direction; power transmission portions formed of circularly arcuate surfaces of convex profile which contiguously adjoin said tooth root portions at a point, and lie at flank surfaces of said tooth portion, and are arranged symmetrically with each other in respect to said tooth width direction centerline; tooth tip portions formed of circularly arcuate surfaces which contiguously adjoin said power transmission portions and are arranged symmetrically with each other in respect to said tooth width direction centerline; a tooth crest surface formed of an approximately flat surface which interconnects with tooth tip portions; wherein a maximum pressure angle at said point where said power transmission portion of said belt tooth flank surface and said arcuate surfaces of said tooth root portion are connected together is between an angle of 15 degrees and an angle of 25 degrees.