US20100054948A1 - Blades of a ceiling fan (2) - Google Patents
Blades of a ceiling fan (2) Download PDFInfo
- Publication number
- US20100054948A1 US20100054948A1 US12/204,653 US20465308A US2010054948A1 US 20100054948 A1 US20100054948 A1 US 20100054948A1 US 20465308 A US20465308 A US 20465308A US 2010054948 A1 US2010054948 A1 US 2010054948A1
- Authority
- US
- United States
- Prior art keywords
- confronting portion
- wind
- blades
- ceiling fan
- confronting
- 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
- 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
-
- 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
- F04D29/384—Blades characterised by form
Definitions
- This invention relates to a ceiling fan, particularly to one whose blades are respectively provided with a front wind-confronting portion and a rear wind-confronting portion that are respectively formed along two sides of the blades so as to lower air drag for promoting power efficiency, with a top surface and a bottom surface interchangeable.
- 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 the blades 12 rotate, 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 12 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 rotating the blades 12 , 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 interchange their top surface and bottom surface by overturning the blades without downgrading power efficiency.
- Each of the blades is respectively provided with a top surface, a bottom surface, a front wind-confronting portion and a rear wind-confronting portion respectively formed obliquely along an edge of two sides of the top surface and the bottom surface.
- the front wind-confronting portion and the rear wind-confronting portion wind-confronting portion are respectively formed of a slope having the same inclined direction. 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 front wind-confronting portion or the rear 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, having its one end pivotally fixed with a shaft of a motor (not shown in Figures) so as to rotate thereof.
- the blade 20 is provided with a top surface 21 and a bottom surface 22 , which are attached with different patterns, and a front wind-confronting portion 23 and a rear wind-confronting portion 24 respectively formed obliquely along two lengthwise sides of the top surface 21 and the bottom surface 22 .
- the front wind-confronting portion 23 and the rear wind-confronting portion 24 are respectively formed of a slope inclined in the same direction.
- Each of the front wind-confronting portion 23 and the rear wind-confronting portion 24 in the embodiment has a flat slope inclining from the top to the bottom.
- the front wind-confronting portion 23 and the rear wind-confronting portion 24 can be also formed as a concave or a convex surface, as shown in FIGS. 7 and 8 .
- a safety arc 25 is created at a boundary between the top surface 21 and the front wind-confronting portion 23 , and between the bottom surface 22 and the rear wind-confronting portion 24 respectively.
- the front 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 interchanged by overturning the blade 20 , the rear wind-confronting portion 24 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 front wind-confronting portion 23 and the rear wind-confronting portion 24 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 front wind-confronting portion 23 and rear wind-confronting portion 24 are formed at the outer portion of the blades 20 to further lessen air drag and promote the motor's efficiency.
- the invention has the following advantages as can be seen from the foresaid description.
Landscapes
- 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, a front wind-confronting portion and a rear wind-confronting portion respectively formed along an edge of two sides of the top surface and the bottom surface. The front wind-confronting portion and the rear wind-confronting portion wind-confronting portion are respectively formed of a slope having the same inclined direction. 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 front wind-confronting portion or the rear 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 front wind-confronting portion and a rear wind-confronting portion that are respectively formed along two sides of the blades so as to lower air drag for promoting power efficiency, with a top surface and a bottom surface interchangeable.
- 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 theblades 12 rotate, 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 theblades 12 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 rotating theblades 12, 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 interchange their top surface and bottom surface by overturning the blades without downgrading power efficiency.
- Each of the blades is respectively provided with a top surface, a bottom surface, a front wind-confronting portion and a rear wind-confronting portion respectively formed obliquely along an edge of two sides of the top surface and the bottom surface. The front wind-confronting portion and the rear wind-confronting portion wind-confronting portion are respectively formed of a slope having the same inclined direction. 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 front wind-confronting portion or the rear 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, having its one end pivotally fixed with a shaft of a motor (not shown in Figures) so as to rotate thereof. Theblade 20 is provided with atop surface 21 and abottom surface 22, which are attached with different patterns, and a front wind-confrontingportion 23 and a rear wind-confrontingportion 24 respectively formed obliquely along two lengthwise sides of thetop surface 21 and thebottom surface 22. The front wind-confrontingportion 23 and the rear wind-confrontingportion 24 are respectively formed of a slope inclined in the same direction. Each of the front wind-confrontingportion 23 and the rear wind-confrontingportion 24 in the embodiment has a flat slope inclining from the top to the bottom. Of course, the front wind-confrontingportion 23 and the rear wind-confrontingportion 24 can be also formed as a concave or a convex surface, as shown inFIGS. 7 and 8 . In addition, in order to prevent a user from being hurt by a sharp edge of theblades 20, asafety arc 25 is created at a boundary between thetop surface 21 and the front wind-confrontingportion 23, and between thebottom surface 22 and the rear wind-confrontingportion 24 respectively. - 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 front 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 interchanged by overturning theblade 20, the rear wind-confrontingportion 24 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 the front wind-confrontingportion 23 and the rear wind-confrontingportion 24 are gradually widened toward one side of theblades 20 opposite to that pivotally fixed with the shaft of the motor, so that a greater front wind-confrontingportion 23 and rear wind-confrontingportion 24 are formed at the outer portion of theblades 20 to further lessen air drag and promote the motor's efficiency. - The invention has the following advantages as can be seen from the foresaid description.
- 1. With the front wind-confronting
portion 23 formed on thetop surface 21 and the rear wind-confrontingportion 24 formed on thebottom surface 22, air drag can be minimized to promote efficiency of the ceiling fan. - 2. With the different patterns attached on the
top surface 21 and thebottom surface 22 of theblades 20, 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 (9)
1. Blades of a ceiling fan, each of said blades made of a plate 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 front wind-confronting portion formed obliquely along a front and a rear side of said top surface, a rear wind-confronting portion formed obliquely along a front and a rear side of said bottom surface, said front wind-confronting portion and said rear wind-confronting portion being shaped as a slope with a same inclined direction.
2. The blades of a ceiling fan as claimed in claim 1 , wherein said front wind-confronting portion and said rear wind-confronting portion are respectively 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 front wind-confronting portion and said rear wind-confronting portion are respectively formed along two lengthwise sides of said top surface and said bottom surface, gradually widened toward a short side of said blades opposite to that pivotally fixed with a shaft of a motor.
4. The blades of a ceiling fan as claimed in claim 1 , wherein said slopes of said front wind-confronting portion and said rear wind-confronting portion are shaped the same.
5. The blades of a ceiling fan as claimed in claim 1 , wherein said slopes of said front wind-confronting portion and said rear wind-confronting portion are formed flat.
6. The blades of a ceiling fan as claimed in claim 1 , wherein said slopes of said front wind-confronting portion and said rear wind-confronting portion are formed concave.
7. The blades of a ceiling fan as claimed in claim 1 , wherein said slopes of said front wind-confronting portion and said rear 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 safety arc 25 is formed at a boundary between said top surface and said front wind-confronting portion, and between said bottom surface and said rear wind-confronting portion respectively.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/204,653 US20100054948A1 (en) | 2008-09-04 | 2008-09-04 | Blades of a ceiling fan (2) |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/204,653 US20100054948A1 (en) | 2008-09-04 | 2008-09-04 | Blades of a ceiling fan (2) |
Publications (1)
Publication Number | Publication Date |
---|---|
US20100054948A1 true US20100054948A1 (en) | 2010-03-04 |
Family
ID=41725729
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/204,653 Abandoned US20100054948A1 (en) | 2008-09-04 | 2008-09-04 | Blades of a ceiling fan (2) |
Country Status (1)
Country | Link |
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US (1) | US20100054948A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USD876614S1 (en) * | 2018-10-26 | 2020-02-25 | Youngo Limited | Ceiling fan blade |
USD877313S1 (en) * | 2018-10-26 | 2020-03-03 | Youngo Limited | Ceiling fan |
US11566633B2 (en) * | 2018-07-10 | 2023-01-31 | 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 US12/204,653 patent/US20100054948A1/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 (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11566633B2 (en) * | 2018-07-10 | 2023-01-31 | Hunter Fan Company | Ceiling fan blade |
US20230144453A1 (en) * | 2018-07-10 | 2023-05-11 | Hunter Fan Company | Ceiling fan blade |
US11927196B2 (en) * | 2018-07-10 | 2024-03-12 | Hunter Fan Company | Ceiling fan blade |
USD876614S1 (en) * | 2018-10-26 | 2020-02-25 | Youngo Limited | Ceiling fan blade |
USD877313S1 (en) * | 2018-10-26 | 2020-03-03 | Youngo Limited | Ceiling fan |
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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 |