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. Efficiency on downdraft is also achieved with the blades having concave top and bottom surfaces.
Claims14
A ceiling fan having a plurality of fan blades mounted for rotation about an upright fan axis of blade rotation and with each fan blade having two elongated side portions that straddle an elongated central portion, and wherein each blade has a concave top surface and a concave bottom surface so that said central portion of each blade is thinner that its two side portions.
A ceiling fan having a plurality of fan blades mounted for rotation about an upright fan axis of blade rotation and with each fan blade having two elongated side portions that straddle an elongated central portion, and wherein said central portion of each blade is thinner that its two side portions and wherein each of said fan blades is curbed upwardly towards its tip end to have a continuously graduated dihedral.
A ceiling fan having a plurality of fan blades mounted for rotation about an upright fan axis of blade rotation and with each fan blade having two elongated side portions that straddle an elongated central portion, and wherein said central portion of each blade is thinner that its two side portions 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 therebetween being non-uniform.
A ceiling fan having a plurality of fan blades with a concave upper and a concave lower surfaces opposite said concave upper surface mounted for bidirectional rotation about an upright fan axis of blade rotation.
The ceiling fan of claim 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.
Dependencies are inferred from the claim text.