Axial flow ring fan

F - Mech Eng,Light,Heat,Weapons – 04 – D

Patent

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230/20

F04D 29/38 (2006.01) F04D 29/32 (2006.01)

Patent

CA 1324995

ABSTRACT An axial flow ring fan has improved efficiency and reduced noise by making the leading edge of each blade a generally sinusoidal shape.

608454

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