| 20100135783 | FAN BLADE AND SHAFT ASSEMBLY MOUNTING ARRANGEMENT OF A BATHROOM EXHAUST FAN - A fan blade and shaft mounting arrangement for bathroom exhaust fan includes a housing, a fan blade which has a hub, a center tube at the center of the hub and blades arranged around the hub, a fan shaft inserted through the center tube of the fan blade and supported between two bearing members in the housing, and a torsion spring that has a torsionable portion sleeved onto the fan shaft and a positioning portion fastened to the fan blade. When the fan shaft is rotated, the torsionable portion of the torsion spring is twisted and secured firmly to the fan shaft so that the fan blade is rotated with the fan shaft. | 06-03-2010 |
