Patent ID: 6813971
Filing Date: 2004-11-09
Classification: B29L,F16H,Y10S,Y10T

Abstract:
A molded gear made entirely of plastic by injection molding and comprised of an inner shaft hole, a web, a rim, formed around an outer periphery of the web, a plurality of teeth on said rim, a circumferential rib provided between said inner shaft hole and said rim and a plurality of diametrical ribs extending radially from said shaft hole to said rim, whereina plurality of holes are defined circumferentially in a portion radially inner than said teeth to extend through said radially inner portion of said web from a front side to a back side of said gear, said diametrical ribs are formed, at one side edge of each of said holes, a plurality of blades are formed so as to extend inclinely with respect to an axial direction from said front side toward said back side, an end of each of said blades on said front side is an extension of a corresponding diametrical rib, and each of said plurality of blades is provided on said circumferential rib.