Patent ID: 6508627
Filing Date: 2003-01-21
Classification: F04D,Y10T

Abstract:
A fan blade comprising:a hollow extrusion having an upper skin with a thickness and a lower skin with a thickness; each of said skins extending from a nose section to a tail section; said nose section having a thickness greater than the thickness of said upper skin and greater than the thickness of said lower skin; said nose section comprising a first longitudinal, extruded groove with a first narrowed open, longitudinally extending mouth; said tail section having a thickness greater than the thickness of said upper skin and greater than the thickness of said lower skin; said tail section comprising a second longitudinal, extruded groove with a second narrowed open, longitudinally extending mouth; and said first and second grooves and said first and second mouths being designed and adapted to retain fasteners within said grooves, and being designed to facilitate forming of said grooves and said mouths during extrusion of said blade.