High efficiency ceiling fan
AssigneeHunter Fan Company
InventorGregory Michael Bird
Life of this patent
Estimating the term…
Abstract
Ceiling fan energy consumption efficiency is enhanced with fan blades that have an angle attack that decreases from root end to tip end at higher rates of decrease nearer their tip ends than at their root ends. Air flow distribution is enhanced with at least a portion of the blades having a dihedral that continuously increases.
Claims12
A ceiling fan having a plurality of fan blades mounted for rotation about an upright fan axis of blade rotation and with each blade having a root end proximal said axis of rotation and a tip end distal said axis of rotation and wherein each blade has a greater angle of attack proximally said fan axis than distally said fan axis and with the rate of change in angle of attack there between being non-uniform, and wherein at least a portion of each blade is curved increasingly upwardly toward its tip end to have a continuously graduated dihedral for enhanced air flow distribution.
A ceiling fan having a plurality of fan blades mounted for rotation about a generally vertical axis wherein each blade has a greater angle of attack proximally said fan axis than distally said fan axis with the rate of change in angle of attack therebetween being non-uniform, and with at least a portion of each blade being arched upwardly with continuously increased dihedral for enhanced air flow dispersion.
Dependencies are inferred from the claim text.