Patent ID: 6039533
Filing Date: 2000-03-21
Classification: F01D,F03D,F04D,F05B,F05D,Y02E,Y02T

Abstract:
An apparatus means for moving air, comprising an apparatus having a plurality of blades, each of said blades having a means for creating a lubricating film of air to reduce drag on the blade when in use in an air stream, each of said blades having a shape comprising an intermediate face portion and leading and trailing longitudinal edge portions associated with opposite edges of the face portion to form, in cross-section, an essentially pan-shaped structure having a convex surface and a concave surface, and further comprising a flange portion extending at an angle of approximately 90 degrees from the trailing edge portion back toward the leading edge portion on the concave side, each blade positioned in said apparatus substantially radially to the direction of moving air flow, said direction of moving air flow being substantially axial to said apparatus.