Patent ID: 8800108

Claim:
A dust collector, comprising: a disk motor having a discoid rotor, a stator, and an output shaft provided coaxially with the discoid rotor; a fan rotating under power from the disk motor; a tank having space for containing collected dust; a head unit covering the tank; a filter separating dust from air or liquid sucked into the tank; a ventilation opening that opens to an inside of the filter along an axial line of the output is formed on a bottom face of the head unit, wherein: the discoid rotor comprises a flange having a flat surface substantially perpendicular to an axial line of the output shaft, the fan is integrally provided with the flat surface of the flange, and extends from the flat surface of the flange toward the ventilation opening, and the discoid rotor and the fan are integrally provided so as to be adjacent to each other in a direction of the axial line of the output shaft.