Patent ID: 6213717
Filing Date: 2001-04-10
Classification: F04D,Y10S

Abstract:
A balancing ring for a ceiling fan, comprising:a ring member having a top side, a bottom side, an inner peripheral wall that confines a central opening, an outer peripheral wall, and an annular groove formed in said top side between said inner and outer peripheral walls, said groove having a groove bottom formed with an annular ball receiving recess;a plurality of metal balls disposed in said ball receiving recess;a ball restraining ring disposed in said groove above said groove bottom, and movable inside said groove in at least an axial direction of said central opening between a restricting position, where said metal balls are restricted from moving freely, and a releasing position, where said metal balls are free to move in said ball receiving recess; andlifting means, provided in said groove, for permitting movement of said ball restraining ring in said groove in response to rotating speed of the balancing ring.