Patent ID: 8070447
Filing Date: 2011-12-06
Classification: F04D

Abstract:
1. A ceiling fan comprising: a disc-like stator provided with a fixed shaft at the center thereof; an annular rotor disposed to the periphery of the stator; a supporting frame fixed to the rotor and rotatably supported by the fixed shaft; a fan blade fixed to the supporting frame; and a retaining member having one end fixed to the supporting frame together with the fan blade and the other end coupled to the fan blade, wherein the fan blade comprises in a unitary structure: a root portion fixed to the supporting frame; a blade portion coupled to the retaining member; and an offset portion formed between the root portion and the blade portion, wherein the offset portion is inclined downward from the root portion toward the blade portion, and wherein an offset height is at a trailing edge side of the blade portion larger than at a leading edge side of the blade portion.