Patent ID: 6669446
Filing Date: 2003-12-30
Classification: F04D

Abstract:
An interchangeable fan blade system for a fan having a radially extending rotary portion, the system comprising:at least one interchangeable fan blade having a proximal end and a distal end; at least one support arm having a proximal end and a distal end, the proximal end removably attached to the rotary portion and the distal end adapted to accept the proximal end of the at least one interchangeable fan blade; and means for removably attaching the proximal end of the at least one interchangeable fan blade to the distal end of the support arm, the means for removably attaching the interchangeable fan blade to the support arm include a plurality of securing apertures disposed on the blade and a complimentary plurality of right-angled hooks disposed on the distal end of the arm, wherein the apertures are configured to receive the hooks.