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US 2020/0224670 A1Published application
Ceiling fan blade
AssigneeHunter Fan Company
InventorsBobby Neal Norwood, Charles William Botkin
Life of this patent
Estimating the term…
Abstract
A ceiling fan or similar air-moving device can include a motor for rotating one or more blades to drive a volume of air about a space. The blade can include a body having an outer surface with a flat top surface and a flat bottom surface, and a side edge. A curved transition can extend between one of the flat top surface or the flat bottom surface, and the side edge. The curved transition can include an elliptical curvature.
Claims20
A blade for a ceiling fan having a fan motor for rotating the blade, the blade comprising:
- a body having an outer surface extending between a root and a tip in a span-wise direction, and extending between a first side edge and a second side edge in a chord-wise direction, the outer surface having at least one of a flat, planar upper portion or a flat, planar lower portion, with at least one flat, planar upper portion or flat lower portion extending at least partially between the first side edge and the second side edge, and having at least one curved transition having an elliptical curvature connecting the at least one of the flat, planar upper portion or the flat lower portion to at least one of the first side edge or the second side edge.
A blade for a ceiling fan, the blade comprising:
- a body having an outer surface including an upper surface, a lower surface, a first side edge, and a second side edge, the body extending between a root and a tip defining a span-wise direction therebetween, and extending between the first side edge and the second side edge defining a chord-wise direction therebetween;
- and
- a first curved transition transitioning between one of the upper surface and the lower surface to at least one of the first side edge or the second side edge, with the first curved transition including a profile defining an elliptical curvature including one of a non-circular elliptical shape, a parabolic shape, or a hyperbolic shape, wherein the profile of the one of the non-circular elliptical shape, the parabolic shape, or the hyperbolic shape is defined by an equation defining a non-circular ellipse, a parabola, or a hyperbola, respectively.
Dependencies are inferred from the claim text.