INDUSTRIAL CEILING FAN

摘要

A large industrial ceiling fan (10). includes exceptionally long fan blades (12) with blade tips that can be tilted upward to more broadly distribute the air. Such broad distribution might be particularly beneficial in cases where the fan is installed relatively low to avoid obstacles such as hanging lights, sprinkler heads and rafters. A low mounting position is possible, because the fan is suspended from a hanger (16) of adjustable length. The fan includes several joints that are redundantly bolted and welded for safety. A continuous. retaining ring provides additional safety. A resilient bushing (20) enhances the flexibility of the fan blades and reduces strain where the fan blades connect to a central mounting hub (52). To more broadly distribute the airflow underneath the fan, each fan blade has a twisted geometry to provide an angle of attack that decreases from the root (64) to the tip (14) of the blade.