Patent ID: 8033793
Filing Date: 2011-10-11
Classification: B29C,B29L,F04D,F05D,Y10T

Abstract:
1. An impeller, comprising: a metallic bush comprising a circumferential boss portion having a substantially truncated cone-shaped throttle portion positioned on a front surface axial end side, a periaxial support boss portion positioned in an axial center, and a circumferential protruding portion positioned on a back surface axial end side; an axial support surface serving as a step formed between said circumferential boss portion and said periaxial support boss portion; a stepped surface serving as a stepped location between said periaxial support boss portion and said circumferential protruding portion; and an impeller main body made of synthetic resin and formed with a V-shaped bulging portion that bulges axially in the center of a front surface side of a disk-shaped vane portion fulcrum, in which a plurality of vanes are formed integrally on the periphery of said V-shaped bulging portion, wherein an outer diameter of said circumferential protruding portion of said bush is formed to be smaller than an outer diameter of an axial end location of said throttle portion, said circumferential protruding portion is positioned on a back surface side of said V-shaped bulging portion, and said bush is inserted into said V-shaped bulging portion.