Patent ID: 8708849

Claim:
A sprocket comprising: a body comprising a plurality of teeth defined relative to respective tooth centers, said tooth centers spaced evenly in a circumferential arrangement, each of said plurality of teeth comprising an engaging flank and a disengaging flank; wherein each pair of circumferentially successive teeth of said plurality of teeth are separated from each other by respective tooth spaces, each of said tooth spaces defined at least partially by the engaging flank of one of said circumferentially successive teeth, the disengaging flank of the other of said circumferentially successive teeth, and a root surface that is located between the engaging flank and the disengaging flank of the tooth space; said engaging flank of each tooth space defined as a mirror image of the disengaging flank of each tooth space relative to a radial tooth space centerline that bisects said tooth space; wherein said plurality of teeth comprise Type A Standard Teeth, Type B Standard Teeth, Type A Relieved Teeth, and Type B Relieved Teeth, wherein: for each of said Type A Standard Teeth, said engaging flank and said disengaging flank thereof are defined with a non-relieved full material flank; for each of said Type B Standard Teeth, said engaging flank and said disengaging flank thereof are defined asymmetrically relative to each other about the tooth center, with said engaging flank thereof defined by a non-relieved full material flank and said disengaging flank thereof defined by a flank-relieved flank that is negatively offset relative to the tooth center as compared to said non-relieved full material flank of said disengaging flank of each of said Type A Standard Teeth; for each of said Type A Relieved Teeth, said engaging flank and said disengaging flank thereof are defined asymmetrically relative to each other about the tooth center, with said disengaging flank thereof defined by a non-relieved full material flank and said engaging flank thereof defined with a flank-relieved flank that is negatively offset relative to the tooth center as compared to said non-relieved full material flank of said engaging flank of each of said Type A Standard Teeth; for each of said Type B Relieved Teeth, said engaging flank and said disengaging flank thereof are each defined with a flank-relieved flank that is negatively offset relative to the tooth center as compared to said non-relieved full material flank of said engaging flank and said disengaging flank, respectively, of each of said Type A Standard Teeth.