Patent ID: 6752035
Filing Date: 2004-06-22
Classification: F16H,Y10S,Y10T

Abstract:
A gear made of a resin, comprising a substantially cylindrical toothed portion formed at a radially outer location, a shaft-supporting section formed at a radially inner location around a rotational center of said tooted portion, a thin plate-shaped web connecting said shaft-supporting section and said toothed portion to each other, wherein said web has a circumferential rib formed thereon concentrically with said toothed portion inside said toothed portion, a plurality of first diametrical ribs formed thereon to diametrically connect said circumferential rib and an outer periphery of said shaft-supporting section to each other along a side of said web, and a second plurality of diametrical ribs formed thereon to diametrically connect said circumferential rib and an inner periphery of said toothed portion, and wherein at least the first plurality of diametrical ribs are formed to extend obliquely and oppositely to a direction of rotation of the gear so that it receives a compressive force at the start of transmission of a power.