US2007009364A1PendingUtilityA1
Blade for ceiling fan
Est. expiryJul 8, 2025(expired)· nominal 20-yr term from priority
Inventors:Mao-Lin Huang
F04D 29/384F04D 25/088
45
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Claims
Abstract
A blade of a ceiling fan includes a first flat end fixed to a blade bracket and a second end which includes an activation portion which includes a convex protruding from a top of the second end of the blade and a concavity is defined in an underside of the activation portion. Two sides of the activation portion are on a common horizontal surface with the first end of the blade. An angle between the horizontal surface and the convex is in a range of 15° to 20°. The blade generates stronger airflow with less resistance.
Claims
exact text as granted — not AI-modified1 . A blade of a ceiling fan, comprising: a first end which is a flat board and adapted to be fixed to a blade bracket, a second end of the blade having an activation portion which is a convex protruding from a top of the second end of the blade and a concavity defined in an underside of the activation portion, two sides of the activation portion being on a common horizontal surface with the first end of the blade, an angle between the horizontal surface and the convex being in a range of 15° to 20°.
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