Patent ID: 6126395
Filing Date: 2000-10-03
Classification: B29C,B29L,F04D

Abstract:
An axial fan comprising:an impeller serving as a rotor arranged to be rotatable with respect to a stator fixed to a main body of said axial fan, said impeller having a permanent magnet therein, and said impeller further including:a bottomed cylindrical component having a substantially convex arcuate surface portion formed by molding from a predetermined resin material such that a shaft body axially supported by a rotary bearing of said main body is formed at a central portion of rotation thereof, anda vane component formed by molding from a predetermined resin material such that a plurality of vanes are radially formed thereon, wherein each said vane is continuously formed to be twisted from an outer peripheral portion to said substantially convex arcuate surface portion with predetermined tilt angles such that an axial velocity of a gas determined by a mounting angle of said vane with respect to a plane perpendicularly intersecting said central portion of rotation becomes substantially equal between said central portion of rotation and said outer peripheral portion of said vanes because of different tilt angles.