Ceiling fan

Patent metadata

Field	Value
Publication number	US-11525462-B2
Application number	US-202117519795-A
Country	US
Kind code	B2
Filing date	Nov 5, 2021
Priority date	Dec 14, 2015
Publication date	Dec 13, 2022
Grant date	Dec 13, 2022

Abstract

A ceiling fan assembly having a motor assembly with a rotating blade hub, and at least one fan blade mounted to the rotating blade hub with a blade span defined between a tip and a root, and defining an airfoil cross section including a rounded leading edge and a v-shaped trailing edge defining a chord therebetween. The blade comprising a pressure side surface and a suction side surface extending between the leading and trailing edges and including a hollow interior and including a tip opening at the tip and a root opening at the root for accessing the hollow interior. The at least one fan blade includes a thickness to chord ratio of less than about 15%.

First claim

What is claimed is:

1. A ceiling fan assembly comprising:
a motor assembly having a rotating blade hub; and
at least one fan blade mounted to the rotating blade hub having a blade span defined between a tip and a root, and defining an airfoil cross section including a rounded leading edge and a v-shaped trailing edge defining a chord therebetween, with the blade comprising a pressure side surface and a suction side surface extending between the leading and trailing edges and including a hollow interior and including a tip opening at the tip and a root opening at the root for accessing the hollow interior;
wherein the at least one fan blade includes a thickness to chord ratio of less than about 15%.

2. The ceiling fan assembly of claim 1 wherein the thickness to chord ratio is 13.8%.

3. The ceiling fan assembly of claim 1 wherein the chord is between 6 and 8 inches, the span is between 6 and 12 feet, and the rotational speed of the at least one blade is between 60 and 80 rpm.

4. The ceiling fan assembly of claim 3 wherein the chord is 7 inches, the span of the at least one blade is about 12 feet, and the rotational speed of the ceiling fan assembly is about 67 rpm.

5. The ceiling fan assembly of claim 1 wherein the pressure side surface and the suction side surfaces extending between the leading and trailing edges provide lift to the at least one blade for improving efficiency of the at least one blade.

6. The ceiling fan assembly of claim 1 wherein the chord is between 6 and 8 inches.

7. The ceiling fan assembly of claim 4 wherein the chord is about 7 inches.

8. The ceiling fan assembly of claim 1 wherein the span of the at least one blade is between 6 and 12 feet.

9. The ceiling fan assembly of claim 8 wherein the span is 9 feet.

10. The ceiling fan assembly of claim 1 wherein the at least one blade is configured for rotation between 50 and 120 rpm.

11. The ceiling fan assembly of claim 8 wherein the speed of rotation of the blades is between 60 and 80 rpm.

12. The ceiling fan assembly of claim 11 wherein the speed of rotation of the blades is about 67 rpm.

13. The ceiling fan assembly of claim 1 wherein the blade is non-symmetrical.

14. The ceiling fan assembly of claim 13 wherein the airfoil cross-section has a maximum thickness of 1 inch.

15. The ceiling fan assembly of claim 14 wherein the airfoil cross-sections has a thickness of 0.97 inches.

16. The ceiling fan assembly of claim 15 wherein the at least one blade is hollow defining a chamber.

17. The ceiling fan assembly of claim 1 wherein the at least one blade includes mount holes 100 for mounting the at least one blade.

18. The ceiling fan assembly of claim 1 wherein the at least one blade comprises five blades.

19. The ceiling fan assembly of claim 1 wherein the at least one blade includes an end that tapers between the leading edge and the trailing edge.

20. The ceiling fan of claim 1 wherein the pressure side surface and the suction side surface bend outwardly in a convex manner from the leading edge toward the centerline and the suction side bends inwardly in a concave manner from the centerline toward the trailing edge.

Assignees

• Hunter Fan Co
• Hunter Fan Compnay

Inventors

• Selig Michael

Classifications

• F04D29/34

  Blade mountings {(for axial flow compressors F04D29/322)} · CPC title

• F04D29/384

  characterised by form · CPC title

• F04D29/646 Primary

  Mounting or removal of fans · CPC title

• F04D25/06

  the pump being electrically driven (F04D25/08 takes precedence) · CPC title

• F04D25/0693

  Details or arrangements of the wiring · CPC title