Patent ID: 8070634

Claim:
A sprocket comprising: at least one groove for engaging a toothed belt; said groove having a flank, the flank having a groove radii (R 1 ) of between approximately 105% and approximately 125% of a belt tooth root radii (R 8 ) when the toothed belt is in rack form; said groove radii being joined to a groove arcuate conjugate flank portion ( 200 ) by a linear flank portion ( 202 ); said groove arcuate conjugate flank portion ( 200 ) extending from said linear flank portion ( 202 ) to a sprocket groove centerline (CL); and said linear flank portion being disposed at an angle (Î¦) of between approximately 18Â° to approximately 24Â° with respect to a groove centerline (CL) and comprising a length of at least approximately 20% of a sprocket groove depth (h).