Patent ID: 8201471

Claim:
A gear comprising: a plurality of teeth to be mated with teeth of another engaged gear; wherein each tooth of the plurality of teeth comprises a first and second tooth flank, a tooth tip surface, and a tooth root, wherein the first and second tooth flanks are symmetric and form an involute curve, wherein a width of the tooth tip surface is the same as a width at the tooth root, wherein a height of the tooth from the tooth tip surface to the tooth root is constant, and wherein the first tooth flank comprises a predetermined region configured to gradually contact a tooth of the another engaged gear, wherein the predetermined region comprises a first inclined plane and a second inclined plane, wherein each of the first and second inclined planes gradually decrease a tooth thickness from a center portion of the first tooth flank along a tooth width direction to a first and second end portion, respectively, without decreasing the tooth thickness at the center portion, the tooth thickness at the center portion being along the involute curve.