Patent ID: 9284961
Filing Date: 2016-03-15
CPC Classification: F04D

Claim Text:
1. A fan device comprising: an impeller having a hub and vanes which are provided at an outer circumferential portion of the hub; a shaft being provided at a center of the hub; and a rotor including the impeller and the shaft and being supported so as to be rotatable around the shaft, wherein the rotor is provided with plural recesses having a bottom, each of the plural recesses having a closed boundary, at least one of the plural recesses has a first area and at least one second area, the first area is located on a circumference having the shaft as a center and extends in a substantially circumferential direction, the second area is connected to the first area and has a shorter length in the circumferential direction than the first area, and wherein the first area and the second area are opened to an exposed surface of the rotor, wherein a balance weight is adhered to at least one of the plural recesses, the balance weight includes a second portion filling the second area and a first portion which is connected to the second portion and extends in the circumferential direction in the first area, and wherein the balance weight is a curable resin.