Bacon & Thomas
Engagement of blade brackets and the motor casing for a ceiling fan
 A ceiling fan includes a motor casing with an engaging ring connected to the bottom of the motor casing, the engaging ring having a plurality of tapered recesses defined in the bottom thereof and each of the recesses having an open end in the inner periphery of the ring and a closed end on the outside of the ring. Each of the recesses has two grooves defined in the two sides thereof. Each of the fan blade brackets has two flanges to be received in the grooves. The first end of each of the end members is stopped by the closed end of the recess. A plurality of balls movably received in the ring and the balls respectively extend into the respective recesses so as to contact the second end of the end members in the recesses. 
F F
F04D F04D
inventional inventional
Huang-Jia
Chen