F - Mech Eng,Light,Heat,Weapons – 04 – D
Patent
F - Mech Eng,Light,Heat,Weapons
04
D
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
Brackett Stephen Edgard
Charles Herbert Noel
Macrae & Co.
Siemens Automotive Limited
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