Patent ID: 6086330
Filing Date: 2000-07-11
Classification: F04D,Y10S

Abstract:
A fan comprising:a hub having a blade attachment surface extending around the circumference of the hub and a hub radius;a plurality of blades extending from the blade attachment surface, each of the plurality of blades having a blade tip distal from the blade attachment surface, a chord length defined as the width of the blade, a hub chord length defined as the chord length of the blade at the blade attachment surface, and a tip chord length defined as the chord length at the tip of the blade, wherein the relationship of the chord length to the (blade radius) is defined as the area bounded by the following equations:(blade radius)=0.0205 metersblade radius=0.0369 meterschord length=0.438*(blade radius)+0.021 meterschord length=0.438*(blade radius)+0.028 meters,and wherein the blade angle is defined as the area bounded by the following equations:blade radius=0.0205 metersblade radius=0.0369 metersblade angle=-625*(blade radius)+53.degree.blade angle=-469*(blade radius)+57.degree..2.