Patent ID: 8333674

Claim:
A V-belt having a number of upper cogs and upper roots with upper pitch and upper curvilinear profile, a number of lower cogs and lower roots with lower pitch and lower curvilinear profile, and a reinforcing tensile layer substantially midway between the upper roots and the lower roots; with the upper profile symmetric and comprising lines (“L”) and arcs (“A”) connected according to the sequence L 1 -A 1 -L 2 -A 2 -L 3 from the center of any of said upper roots to the center of an adjacent cog of said upper cogs; with the lower profile symmetric and comprising lines and arcs connected according to the sequence A 3 -L 5 -A 4 -L 6 from the center of any of said lower roots to the center of an adjacent cog of said lower cogs; and with the sum of the length of L 1 plus the radius of A 1 equal to or within 20% of the radius of A 3 ; and with at least one of said upper roots being substantially aligned with at least one of said lower roots; and with both side surfaces of the V-belt including both upper and lower cogs cut at an angle α/2 with respect to the vertical axis of the belt, and with a in the range of approximately 15° to 50° .