Patent ID: 7396212

Claim:
A high efficiency ceiling fan comprising: a hub with a motor; and a plurality of twisted leaf shaped blades attached to the ceiling fan motor, each blade having a twist between a root end, a first midportion, a second midportion, a third midportion, a fourth midportion and a tip end; the tip end having a width between approximately 2.85″ to approximately 3.02″ with a leading edge between approximately 18″ to approximately 12″ below the horizontal plane, and a trailing edge between the horizontal plane and approximately 7 degrees above the horizontal plane; the first midportion having a width between approximately 7.47″ to approximately 7.18″ with a leading edge between approximately 13 degrees to approximately 10 degrees below the horizontal plane, and a trailing edge up to approximately 3 degrees below the horizontal plane; the second midportion having a width of approximately 10.72″ to approximately 9.05″ with a leading edge between approximately 10 degrees to approximately 5 degrees below the horizontal plane, and a trailing edge between approximately 13 degrees to approximately 6 degrees below the horizontal plane; the third midportion having a width between approximately 12.20″ to approximately 10.90″ with a leading edge up to approximately 5 degrees below the horizontal plane, and a trailing edge between approximately 7 degrees to approximately 2 degrees below the horizontal plane; the fourth midportion having width between approximately 9.15″ to approximately 9.00″ with a leading edge between approximately 4 degrees above the horizontal plane, and a trailing edge approximately 1 degree below the horizontal plane; the root end having a width between approximately 5.54″ to approximately 6.00″ with a leading edge between approximately 14 degrees to approximately 5 degrees above the horizontal plane, wherein the twisted leaf shaped blades move greater amounts of air compared to planar shaped blades.