US20100054947A1 - Blades of a ceiling fan (1) - Google Patents
Blades of a ceiling fan (1) Download PDFInfo
- Publication number
- US20100054947A1 US20100054947A1 US12/204,631 US20463108A US2010054947A1 US 20100054947 A1 US20100054947 A1 US 20100054947A1 US 20463108 A US20463108 A US 20463108A US 2010054947 A1 US2010054947 A1 US 2010054947A1
- Authority
- US
- United States
- Prior art keywords
- blades
- ceiling fan
- wind
- top surface
- confronting portion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/38—Blades
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
- F04D25/088—Ceiling fans
Definitions
- This invention relates to a ceiling fan, particularly to one whose blades are respectively provided with a wind-confronting portion that is formed around an edge of a top surface and a bottom surface and composed of two slopes respectively tapered symmetrically from the top surface and the bottom surface to the outmost center of the thickness of the blades, with the top surface and the bottom surface exchangeable.
- a conventional ceiling fan 10 is mainly composed of a motor 11 and plural blades 12 .
- the motor 11 is fixed at a certain position, provided with a shaft 111 pivotally positioned at its front for being driven by the motor 11 to rotate.
- the blades 12 are equidistantly fixed around the shaft 111 to create air flow while being whirled by the shaft 111 .
- FIGS. 2 and 3 in order to lower air drag while rotating the blades 12 , each of the blades 12 is provided with a wind-confronting portion 121 formed downwards at its two sides respectively; or, as shown in FIG.
- the wind-confronting portion 121 is formed only at one side of the blades 12 confronting air while the blades rotate. And, the blades 12 are always obliquely fixed with the shaft 111 with a preset angle.
- air drag can be lessened as the area of the wind-confronting portion 121 confronting air can be minimized while the blades 12 rotate, so as to promote efficiency of the motor 11 .
- the wind-confronting portions 121 are to comparatively increase their area confronting air, enabling air drag increased.
- the ceiling fan is usually hung in a living room or where is needed to be esthetically ornamented, it has to be comparatively decorative. But the conventional ceiling fan is always made commonplace, it has to be replaced with a new one in case that it cannot match with a decorative environment, posing a further economic burden.
- the object of this invention is to offer blades of a ceiling fan able to be overturned to exchange their top surface and bottom surface without downgrading power efficiency.
- Each of the blades is provided with a top surface, a bottom surface and a wind-confronting portion obliquely formed along an edge of the top surface and the bottom surface.
- the wind-confronting portion is composed of two slopes respectively tapered symmetrically from the top surface and the bottom surface to an outmost tip of the blades. No matter if the top surface or the bottom surface faces downward after having the blades fixed with a shaft of a motor, the area of the wind-confronting portion confronting air is always such minimized that air drag can be lowered.
- various pattern combinations can be obtained to diversify the outlook of the ceiling fan.
- FIG. 1 is a side view of a conventional ceiling fan
- FIG. 2 is a perspective view of a blade of a conventional ceiling fan
- FIG. 3 is a cross-sectional view of a blade of a conventional ceiling fan
- FIG. 4 is a cross-sectional view of another blade of a conventional ceiling fan
- FIG. 5 is a perspective view of a first preferred embodiment of a blade of a ceiling fan in the present invention.
- FIG. 6 is a cross-sectional view of the first preferred embodiment of a blade of a ceiling fan in the present invention.
- FIG. 7 is a cross-sectional view of the first preferred embodiment of another blade of a ceiling fan in the present invention.
- FIG. 8 is a cross-sectional view of the first preferred embodiment of another blade of a ceiling fan in the present invention.
- FIG. 9 is a cross-sectional view of the first preferred embodiment of another blade of a ceiling fan in the present invention.
- FIG. 10 is a perspective view of a second preferred embodiment of a blade of a ceiling fan in the present invention.
- FIG. 11 is a cross-sectional view of the second preferred embodiment of a blade of a ceiling fan in the present invention.
- FIGS. 5 and 6 show a first preferred embodiment of blades 20 of a ceiling fan in the present invention.
- Each of the blades 20 is made of a plate with a certain thickness, having its one short side pivotally fixed with a shaft of a motor (not shown in Figures) so as to rotate thereof.
- Each of the blades 20 is provided with a top surface 21 and a bottom surface 22 , which are attached with different patterns, and a wind-confronting portion 23 formed around a circumferential edge of the top surface 21 and the bottom surface 22 .
- the wind-confronting portion 23 is composed of two slopes 231 respectively tapered symmetrically from the top surface 21 and the bottom surface 22 to the outmost tip of the blade 20 ; or, the wind-confronting portion 23 can be only formed at one side of the blades 20 about to confront air while whirling the blades 20 .
- the slopes 231 are formed flat in the embodiment.
- the slopes 231 can be also formed concave or convex, as shown in FIGS. 7 and 8 .
- the boundary in order to prevent a sharp boundary between the slopes 231 from hurting a user, the boundary can be formed of a safety arc 232 shown in FIG. 9 ; or, the boundary between the wind-confronting portion 23 and the top surface 21 or the bottom surface 22 can be correspondingly formed with a safety arc.
- the wind-confronting portion 23 is to confront air with a minimized area for lowering air drag so that the motor can efficiently work to provide powerful rotation. If the top surface 21 and the bottom surface 22 are exchanged, the wind-confronting portion 23 can still confront air with a minimized area without downgrading efficiency.
- the diverse patterns attached on the top surface 21 and the bottom surface 22 a variety of the pattern combinations can be achieved to diversify the outlook of the ceiling fan.
- a second preferred embodiment of blades of a ceiling fan in the present invention has the same components as the first one does, except that the slopes 231 of the wind-confronting portion 23 are gradually widened toward one side of the blades 20 opposite to that pivotally fixed with the shaft of the motor, so that a greater wind-confronting portion 23 is formed at the outer portion of the blades 20 to further lessen air drag and promote the motor's efficiency.
- the motor can efficiently work to upgrade rotation. And, with the different patterns attached on the top surface 21 and the bottom surface 22 , a variety of the pattern combinations can be achieved to diversify the outlook of the ceiling fan.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The blades of a ceiling fan are respectively provided with a top surface, a bottom surface and a wind-confronting portion obliquely formed along an edge of the top surface and the bottom surface. The wind-confronting portion is composed of two slopes respectively tapered symmetrically from the top surface and the bottom surface to an outmost tip of the blades. No matter if the top surface or the bottom surface faces downward after having the blades fixed with a shaft of a motor, the are a of the wind-confronting portion confronting air is always such minimized that air drag can be lowered. Moreover, with the top surface and the bottom surface attached with different patterns, various pattern combinations can be obtained to diversify the outlook of the ceiling fan.
Description
- 1. Field of the Invention
- This invention relates to a ceiling fan, particularly to one whose blades are respectively provided with a wind-confronting portion that is formed around an edge of a top surface and a bottom surface and composed of two slopes respectively tapered symmetrically from the top surface and the bottom surface to the outmost center of the thickness of the blades, with the top surface and the bottom surface exchangeable.
- 2. Description of the Prior Art
- Commonly, as shown in
FIG. 1 , aconventional ceiling fan 10 is mainly composed of amotor 11 andplural blades 12. Themotor 11 is fixed at a certain position, provided with ashaft 111 pivotally positioned at its front for being driven by themotor 11 to rotate. Theblades 12 are equidistantly fixed around theshaft 111 to create air flow while being whirled by theshaft 111. As shown inFIGS. 2 and 3 , in order to lower air drag while rotating theblades 12, each of theblades 12 is provided with a wind-confrontingportion 121 formed downwards at its two sides respectively; or, as shown inFIG. 4 , the wind-confrontingportion 121 is formed only at one side of theblades 12 confronting air while the blades rotate. And, theblades 12 are always obliquely fixed with theshaft 111 with a preset angle. Of course, with the wind-confrontingportion 121 formed around theblades 12, air drag can be lessened as the area of the wind-confrontingportion 121 confronting air can be minimized while theblades 12 rotate, so as to promote efficiency of themotor 11. - However, because the
blades 12 are obliquely positioned downward, the wind-confrontingportions 121 are to comparatively increase their area confronting air, enabling air drag increased. Moreover, the ceiling fan is usually hung in a living room or where is needed to be esthetically ornamented, it has to be comparatively decorative. But the conventional ceiling fan is always made commonplace, it has to be replaced with a new one in case that it cannot match with a decorative environment, posing a further economic burden. - The object of this invention is to offer blades of a ceiling fan able to be overturned to exchange their top surface and bottom surface without downgrading power efficiency.
- Each of the blades is provided with a top surface, a bottom surface and a wind-confronting portion obliquely formed along an edge of the top surface and the bottom surface. The wind-confronting portion is composed of two slopes respectively tapered symmetrically from the top surface and the bottom surface to an outmost tip of the blades. No matter if the top surface or the bottom surface faces downward after having the blades fixed with a shaft of a motor, the area of the wind-confronting portion confronting air is always such minimized that air drag can be lowered. Moreover, with the top surface and the bottom surface attached with different patterns, various pattern combinations can be obtained to diversify the outlook of the ceiling fan.
- This invention is better understood by referring to the accompanying drawings, wherein:
-
FIG. 1 is a side view of a conventional ceiling fan; -
FIG. 2 is a perspective view of a blade of a conventional ceiling fan; -
FIG. 3 is a cross-sectional view of a blade of a conventional ceiling fan; -
FIG. 4 is a cross-sectional view of another blade of a conventional ceiling fan; -
FIG. 5 is a perspective view of a first preferred embodiment of a blade of a ceiling fan in the present invention; -
FIG. 6 is a cross-sectional view of the first preferred embodiment of a blade of a ceiling fan in the present invention; -
FIG. 7 is a cross-sectional view of the first preferred embodiment of another blade of a ceiling fan in the present invention; -
FIG. 8 is a cross-sectional view of the first preferred embodiment of another blade of a ceiling fan in the present invention; -
FIG. 9 is a cross-sectional view of the first preferred embodiment of another blade of a ceiling fan in the present invention; -
FIG. 10 is a perspective view of a second preferred embodiment of a blade of a ceiling fan in the present invention; and -
FIG. 11 is a cross-sectional view of the second preferred embodiment of a blade of a ceiling fan in the present invention. -
FIGS. 5 and 6 show a first preferred embodiment ofblades 20 of a ceiling fan in the present invention. Each of theblades 20 is made of a plate with a certain thickness, having its one short side pivotally fixed with a shaft of a motor (not shown in Figures) so as to rotate thereof. Each of theblades 20 is provided with atop surface 21 and abottom surface 22, which are attached with different patterns, and a wind-confrontingportion 23 formed around a circumferential edge of thetop surface 21 and thebottom surface 22. The wind-confrontingportion 23 is composed of twoslopes 231 respectively tapered symmetrically from thetop surface 21 and thebottom surface 22 to the outmost tip of theblade 20; or, the wind-confrontingportion 23 can be only formed at one side of theblades 20 about to confront air while whirling theblades 20. Theslopes 231 are formed flat in the embodiment. Of course, theslopes 231 can be also formed concave or convex, as shown inFIGS. 7 and 8 . In addition, in order to prevent a sharp boundary between theslopes 231 from hurting a user, the boundary can be formed of asafety arc 232 shown inFIG. 9 ; or, the boundary between the wind-confrontingportion 23 and thetop surface 21 or thebottom surface 22 can be correspondingly formed with a safety arc. - In order to further understand the structural features, operative techniques and expected effects of the invention, how to use the invention is to be described below.
- As shown in
FIGS. 5 and 6 , when theblades 20 are turned around, the wind-confrontingportion 23 is to confront air with a minimized area for lowering air drag so that the motor can efficiently work to provide powerful rotation. If thetop surface 21 and thebottom surface 22 are exchanged, the wind-confrontingportion 23 can still confront air with a minimized area without downgrading efficiency. Thus, with the diverse patterns attached on thetop surface 21 and thebottom surface 22, a variety of the pattern combinations can be achieved to diversify the outlook of the ceiling fan. - As shown in
FIGS. 10 and 11 , a second preferred embodiment of blades of a ceiling fan in the present invention has the same components as the first one does, except that theslopes 231 of the wind-confrontingportion 23 are gradually widened toward one side of theblades 20 opposite to that pivotally fixed with the shaft of the motor, so that a greater wind-confrontingportion 23 is formed at the outer portion of theblades 20 to further lessen air drag and promote the motor's efficiency. - The advantages of the invention are described as can be seen from the foresaid description.
- With the wind-confronting
portion 23 formed in thetop surface 21 and thebottom surface 22 to lower air drag, the motor can efficiently work to upgrade rotation. And, with the different patterns attached on thetop surface 21 and thebottom surface 22, a variety of the pattern combinations can be achieved to diversify the outlook of the ceiling fan. - While the preferred embodiment of the invention has been described above, it will be recognized and understood that various modifications may be made therein and the appended claims are intended to cover all such modifications that may fall within the spirit and scope of the invention.
Claims (10)
1. Blades of a ceiling fan, each of said blades made of a plate with a certain thickness and having its one short side pivotally fixed with a shaft of a motor so as to rotate thereof and comprising:
a top surface and a bottom surface which are formed flat, a wind-confronting portion formed along a circumferential edge of said top surface and said bottom surface and composed of two slopes respectively tapered symmetrically from said top surface and said bottom surface to an outmost tip of each said blade.
2. The blades of a ceiling fan as claimed in claim 1 , wherein said wind-confronting portion is formed along two lengthwise sides of said top surface and said bottom surface.
3. The blades of a ceiling fan as claimed in claim 1 , wherein said wind-confronting portion is formed around a circumferential edge of each said blade.
4. The blades of a ceiling fan as claimed in claim 1 , wherein said wind-confronting portion is formed along two lengthwise sides of said top surface and said bottom surface and gradually widened toward a side of said blades opposite to that pivotally fixed with said shaft of said motor.
5. The blades of a ceiling fan as claimed in claim 1 , wherein said slopes of said wind-confronting portion are formed flat.
6. The blades of a ceiling fan as claimed in claim 1 , wherein said slopes of said wind-confronting portion are formed concave.
7. The blades of a ceiling fan as claimed in claim 1 , wherein said slopes of said wind-confronting portion are formed convex.
8. The blades of a ceiling fan as claimed in claim 1 , wherein said top surface and said bottom surface are decorated with different patterns.
9. The blades of a ceiling fan as claimed in claim 1 , wherein a boundary between two said slopes of said wind-confronting portion is formed of a safety arc.
10. The blades of a ceiling fan as claimed in claim 1 , wherein a boundary between said wind-confronting portion and said top surface or said bottom surface is correspondingly formed of a safety arc.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/204,631 US20100054947A1 (en) | 2008-09-04 | 2008-09-04 | Blades of a ceiling fan (1) |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/204,631 US20100054947A1 (en) | 2008-09-04 | 2008-09-04 | Blades of a ceiling fan (1) |
Publications (1)
Publication Number | Publication Date |
---|---|
US20100054947A1 true US20100054947A1 (en) | 2010-03-04 |
Family
ID=41725728
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/204,631 Abandoned US20100054947A1 (en) | 2008-09-04 | 2008-09-04 | Blades of a ceiling fan (1) |
Country Status (1)
Country | Link |
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US (1) | US20100054947A1 (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11111930B2 (en) * | 2018-07-10 | 2021-09-07 | Hunter Fan Company | Ceiling fan blade |
US20220034329A1 (en) * | 2020-07-28 | 2022-02-03 | Hunter Fan Company | Ceiling fan blade |
US11415146B2 (en) * | 2019-01-15 | 2022-08-16 | Hunter Fan Company | Ceiling fan blade |
US20230250832A1 (en) * | 2022-02-04 | 2023-08-10 | Hunter Fan Company | Ceiling fan blade |
US20230279869A1 (en) * | 2022-03-01 | 2023-09-07 | Hunter Fan Company | Ceiling fan blade |
US11892008B2 (en) | 2022-05-23 | 2024-02-06 | Hunter Fan Company | Ceiling fan and blade |
US12098729B2 (en) * | 2022-02-04 | 2024-09-24 | Hunter Fan Company | Ceiling fan blade |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030190234A1 (en) * | 2002-04-08 | 2003-10-09 | Yung-Chung Huang | Hollow blades for ceiling fans |
US20050129523A1 (en) * | 2003-12-11 | 2005-06-16 | Liu Ching Wen W. | Ceiling fan blade |
US7210910B1 (en) * | 1998-04-07 | 2007-05-01 | Research Foundation Of The University Of Central Florida, Inc. | Enhancements to high efficiency ceiling fan |
US7284960B2 (en) * | 2004-07-21 | 2007-10-23 | Delta T Corporation | Fan blades |
US20080213097A1 (en) * | 2007-03-01 | 2008-09-04 | Oleson Richard A | Angled airfoil extension for fan blade |
US20090324416A1 (en) * | 2008-06-30 | 2009-12-31 | Ge Wind Energy Gmbh | Wind turbine blades with multiple curvatures |
-
2008
- 2008-09-04 US US12/204,631 patent/US20100054947A1/en not_active Abandoned
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7210910B1 (en) * | 1998-04-07 | 2007-05-01 | Research Foundation Of The University Of Central Florida, Inc. | Enhancements to high efficiency ceiling fan |
US20030190234A1 (en) * | 2002-04-08 | 2003-10-09 | Yung-Chung Huang | Hollow blades for ceiling fans |
US20050129523A1 (en) * | 2003-12-11 | 2005-06-16 | Liu Ching Wen W. | Ceiling fan blade |
US7284960B2 (en) * | 2004-07-21 | 2007-10-23 | Delta T Corporation | Fan blades |
US20080213097A1 (en) * | 2007-03-01 | 2008-09-04 | Oleson Richard A | Angled airfoil extension for fan blade |
US20090324416A1 (en) * | 2008-06-30 | 2009-12-31 | Ge Wind Energy Gmbh | Wind turbine blades with multiple curvatures |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11111930B2 (en) * | 2018-07-10 | 2021-09-07 | Hunter Fan Company | Ceiling fan blade |
US11566633B2 (en) | 2018-07-10 | 2023-01-31 | Hunter Fan Company | Ceiling fan blade |
US11927196B2 (en) | 2018-07-10 | 2024-03-12 | Hunter Fan Company | Ceiling fan blade |
US11415146B2 (en) * | 2019-01-15 | 2022-08-16 | Hunter Fan Company | Ceiling fan blade |
US20220034329A1 (en) * | 2020-07-28 | 2022-02-03 | Hunter Fan Company | Ceiling fan blade |
US11635081B2 (en) * | 2020-07-28 | 2023-04-25 | Hunter Fan Company | Ceiling fan blade |
US20230250832A1 (en) * | 2022-02-04 | 2023-08-10 | Hunter Fan Company | Ceiling fan blade |
US12098729B2 (en) * | 2022-02-04 | 2024-09-24 | Hunter Fan Company | Ceiling fan blade |
US20230279869A1 (en) * | 2022-03-01 | 2023-09-07 | Hunter Fan Company | Ceiling fan blade |
US11815101B2 (en) * | 2022-03-01 | 2023-11-14 | Hunter Fan Company | Ceiling fan blade |
US11892008B2 (en) | 2022-05-23 | 2024-02-06 | Hunter Fan Company | Ceiling fan and blade |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |