Patent ID: 6599210
Filing Date: 2003-07-29
Classification: F16H

Abstract:
A sprocket comprising:a mounting part having a rotary axis and adapted to be mounted on a rotary member, said mounting part having a first plate surface side and a second-plate surface side on opposing sides of a plane through said mounting part and perpendicular to the axis; and an outer peripheral part having teeth adapted to be engaged with a chain, wherein said mounting part comprises at least one first section raised on said first plate surface side and projecting away from said second plate surface side, and at least one second section raised on said second plate surface side and projecting away from said first plate surface side, so as to lessen an occurrence of distortion or curving due to hardening, and wherein a top portion of said at least one first section and a top portion of said at least one second section are level with a bottommost end surface and an uppermost end surface of said outer peripheral part, respectively.