Patent ID: RE39448

Claim:
A connecting device for connecting a fan blade to a rotor of a motor of a ceiling fan, the motor including a stator and the rotor which is concentrically surrounded by the stator and which is rotated about an axial direction, said connecting device comprising: a bottom member with a periphery adapted to be attached adjacent on the rotor and spaced apart from the stator in the axial direction, said bottom member being disposed transverse to and being rotatable about the axial direction; a circumferential wall extending upwardly from said periphery toward the stator and diverging away from said bottom member so as to form an annular slanting wall; a mounting arm including an anchored end adapted for mounting the fan blade thereon, and an anchoring end disposed to be brought to anchor adjacent on said bottom member such that said mounting arm is oriented in one a radial outward direction relative to said bottom member; means for tightening said anchoring end relative to said bottom member through a damping force generated in a circumferential direction of said bottom member when said anchoring end is pulled away from said bottom member in said radial direction, said tightening means being disposed between said mounting arm and said bottom member; a guiding member adjacent disposed between said anchoring end and adjacent said bottom member to guide said anchoring end to move in said one radial outward direction to said bottom member , wherein said guiding member locks the mounting arm to said bottom member by said mounting arm being pulled in the one radial outward direction without twisting between the mounting arm and the bottom member, wherein said guiding member includes a groove on said bottom member and sliding member on said anchoring end of the mounting arm so as to fit slidably in said groove; and a retaining member having an engaging spring member that abuts against a portion of the guiding member for locking said sliding member to the groove ; and a retaining member disposed between said tightening means and said anchored end in said radial direction, and including an engaging spring member mounted on said mounting arm, said engaging spring member abutting against said annular slanting wall and providing an upward biasing force to said annular wall once said anchoring end is moved away from said bottom member in said radial direction .