Patent ID: 7648339

Claim:
A fan blade assembly, comprising: at least three flexible fan blades wherein each fan blade comprises two pieces of substantially air impermeable material secured together to present a sock-like cavity, said cavity presenting an opening in a hub end through which air enters to inflate said blade when said blade is rotated; said at least three fan blades each secured to a fan hub having at least three apertures spaced equidistant from each other and oriented at a pitch of between approximately 30 and 40 degrees wherein each of said at least three fan blades passes through one of each of said at least three apertures from the interior side of said hub such that each of said blades extends radially outward from said hub; said hub further comprising two pins located on each longitudinal side of each of said at least three apertures, each pin extending toward the interior of said hub, said pins passing through the material at said hub end of each blade, wherein the surrounding atmosphere is in fluid communication with said cavity; and said fan hub is capable of mechanical connection to a motor assembly to facilitate rotation of said fan hub.