WO2014005171A1 - Ceiling fan - Google Patents
Ceiling fan Download PDFInfo
- Publication number
- WO2014005171A1 WO2014005171A1 PCT/AU2013/000584 AU2013000584W WO2014005171A1 WO 2014005171 A1 WO2014005171 A1 WO 2014005171A1 AU 2013000584 W AU2013000584 W AU 2013000584W WO 2014005171 A1 WO2014005171 A1 WO 2014005171A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- fan
- blade
- fan blade
- segments
- plate
- Prior art date
Links
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
- F04D19/00—Axial-flow pumps
- F04D19/002—Axial flow 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
- F04D29/34—Blade mountings
- F04D29/36—Blade mountings adjustable
- F04D29/362—Blade mountings adjustable during rotation
-
- 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
- F04D29/388—Blades characterised by construction
Definitions
- This invention relates to a ceiling fan and more particularly relates to a ceiling fan with retractable blades .
- Ceiling fans that often incorporate light fittings and it has been proposed to incorporate retractable blades that retract within the confines of the light fitting when not in use and expand radially outwardly when in use to operate as conventional fan blades.
- a fan blade comprising a mount
- a ceiling fan comprising an electric motor adapted to drive a rotating plate that supports a plurality of equally spaced fan blades that extend radially of the plate, each fan blade comprising a root and a tip joined by leading and trailing edges, the root being adapted to be secured to the plate, wherein each blade comprises a plurality of fan blade segments arranged to slide telescopically one within the other whereby the fan blade segments can be located substantially within the periphery of the plate in a retracted configuration and can extend radially outwardly in an operative
- Figures la, lb and lc are respectively plan, side and perspective views of a fan in an expanded operative configuration
- Figures 2a, 2b, and 2c are respectively plan, side and perspective views of the fan in a retracted
- Figures 3a and 3b are respectively plan and side elevational views of the fan in the retracted
- Figures 4a, 4b and 4c are respectively plan, side and perspective views of the fan in the expanded operative configuration with components omitted for clarity,
- Figure 5 is a plan view of part of components for the fan in the expanded configuration
- Figure 6 is a plan view of one blade assembly in the expanded configuration
- Figure 7 is a cross sectional view taken along the lines A-A of Figure 6
- Figure 8 is a cross sectional view taken along the lines B-B of Figure 6, and
- Figure 9 is a cross sectional view taken along the lines C-C of Figure 6.
- the ceiling fan 10 as illustrated in the accompanying drawings comprises an electric motor 11 that is hung from the ceiling.
- the electric motor 11 is coupled to a circular plate 12 whereby the motor 11 rotates the plate 12 about a vertical axis .
- the plate 12 is adapted to support four equally spaced fan blade assemblies 20, 21, 22, 23.
- Each blade assembly 20 to 23 comprises three fan blade segments 30, 31, 32 that can slide relative to one another from a retracted position ( Figure 2) where the fan blade segments are within the confines of the plate 12 to an outward operative position ( Figure 1) in which the fan blade segments 30-32 project radially outwardly of the plate 12 to facilitate movement of air as the plate 12 is rotated by the electric motor 11.
- the electric motor 11 can be either on top of or below the plate 12.
- Each blade assembly 20- 23 is positioned on the periphery of the plate 12 via a mount 40 that is secured to the plate 12. As shown in Figure 2a the mounts 40 are equally spaced around the periphery of the plate to be diametrically opposed to one another.
- the blade comprises three blade segments, namely the first outer segment 30, an
- Each mount 40 comprises a pair of support legs 41, 42 having outwardly extending flanges 43, 44 that enable the legs to be screwed to the surface of the plate 12.
- the support legs 41, 42 support a bridging member 45 that defines a slot 46 that accommodates a first outer blade segment 30.
- the slot defines a passageway that allows the blade segments 30 to be a smooth sliding fit within the slot 46.
- the legs 41, 42 of the mount assembly are also arranged so that the slot is on an incline of between 10 and 15 degrees (see Figure 2b) .
- the angle on the slot gives the blade, which is otherwise flat, an angle of incidence to give the desired air movement when in the extended and operative position.
- the blade segments 30, 31, 32 all slide relative to one another so that in the retracted position ( Figure 2) the tip 32 is wholly within the intermediate segment 31 which is wholly within the outer segment 30. In the extended position shown in Figure 2 the tip 32 projects radially outwardly of the intermediate segment 31 which is in turn radially outwardly of the outer segment 30.
- the telescopic arrangement of the three blade segments allows the segments to slide outwardly and the force to urge this outward movement is the centrifugal force generated by rotation of the plate 12 by the electric motor 11.
- Each diametrically opposed pair of blade assemblies 21, 22 or 23, 24 are interconnected by a chain 50 that rotates about a sprocket 51 located on the underside of each mount 40.
- the chain is also coupled to a centrally located sprocket 52 that is in turn coupled to a coil spring 53 located within a housing 54.
- the chain 50 is attached to an elongate rod 60 via an adjustable linkage.
- the rod 60 extends parallel to the chain 50 and is coupled to an inner end of the outer blade segment 32. Movement of the chain 50 pills the rod 60 radially inwards to pull the outer blade segment 32 into the intermediate segment 31 until the inner end of the blade segment 32 abuts stop 63 on the inner end of the intermediate segment 31. Further movement of the rod 60 causes inward displacement of the intermediate segment 31 until it engages stops 64 on the inner end of the first blade segment 30. Al these segments 30, 31, 32 are then pulled by the rod 60 under the mount 40 to assume the fully retracted position shown in Figure 2.
- the fan blade segments 30-32 are moulded in plastics to define leading and trailing edges.
- the blade segments 30-32 are substantially flat and the tip segment 32 has a curved end.
- the fan described above has a number of advantages over conventional fans with retractable blades. Because the blades do not pivot from the operative to the
- the fact that the blade segments expand radially or in a longitudinal sense means that the blades can be designed to have increased length to thereby increase the airflow. Furthermore, the telescopic location of the blade segments allows the fan to assume a compact and comparatively thin configuration in the retracted position which makes the fan, especially when it incorporates a light fitting, much more attractive in the retracted position than is the case with other fans with retractable blades where the blades form an unsightly nest above the light fitting.
Abstract
A fan blade comprising a mount supporting a plurality of superimposed fan blade segments arranged to slide relative to one another from a retracted storage configuration to an extended operative configuration.
Description
CEILING FAN
Introduction
This invention relates to a ceiling fan and more particularly relates to a ceiling fan with retractable blades .
Background of the Invention
The problem with many ceiling fans is that the radially projecting blades become unsightly dust
collectors when the fan is not in use. Ceiling fans that often incorporate light fittings and it has been proposed to incorporate retractable blades that retract within the confines of the light fitting when not in use and expand radially outwardly when in use to operate as conventional fan blades.
Problems with fans of this kind concern ensuring a balanced configuration especially as the blades move between the retracted and operative positions. A further problem with fans of this kind is the limit on the length of the blades to enable then to retract within the confines of the light fitting. This usually requires the blades to nest with the tip of one blade above the root of the adjacent blade, thus leading to an unsightly slack of blades. If the blades are made shorter to reduce the need for overlapping then the blades lack the aerodynamics to move sufficient air to operate efficiently as a fan.
It is these issues that have brought about the present invention.
Summary of the invention
According to one aspect of the present invention there is provided a fan blade comprising a mount
supporting a plurality of superimposed fan blade segments arranged to slide relative to one another from a retracted
storage configuration to an extended operative
configuration.
According to another aspect of the present invention there is provided a ceiling fan comprising an electric motor adapted to drive a rotating plate that supports a plurality of equally spaced fan blades that extend radially of the plate, each fan blade comprising a root and a tip joined by leading and trailing edges, the root being adapted to be secured to the plate, wherein each blade comprises a plurality of fan blade segments arranged to slide telescopically one within the other whereby the fan blade segments can be located substantially within the periphery of the plate in a retracted configuration and can extend radially outwardly in an operative
configuration.
Description of the Drawings
Embodiments of the present invention will now be described by way of example only with reference to the accompanying drawings in which:
Figures la, lb and lc are respectively plan, side and perspective views of a fan in an expanded operative configuration,
Figures 2a, 2b, and 2c are respectively plan, side and perspective views of the fan in a retracted
inoperative configuration,
Figures 3a and 3b are respectively plan and side elevational views of the fan in the retracted
configuration illustrating a drive assembly,
Figures 4a, 4b and 4c are respectively plan, side and perspective views of the fan in the expanded operative configuration with components omitted for clarity,
Figure 5 is a plan view of part of components for the fan in the expanded configuration,
Figure 6 is a plan view of one blade assembly in the expanded configuration,
Figure 7 is a cross sectional view taken along the lines A-A of Figure 6,
Figure 8 is a cross sectional view taken along the lines B-B of Figure 6, and
Figure 9 is a cross sectional view taken along the lines C-C of Figure 6.
Description of the Preferred Embodiments
The ceiling fan 10 as illustrated in the accompanying drawings comprises an electric motor 11 that is hung from the ceiling. The electric motor 11 is coupled to a circular plate 12 whereby the motor 11 rotates the plate 12 about a vertical axis . The plate 12 is adapted to support four equally spaced fan blade assemblies 20, 21, 22, 23. Each blade assembly 20 to 23 comprises three fan blade segments 30, 31, 32 that can slide relative to one another from a retracted position (Figure 2) where the fan blade segments are within the confines of the plate 12 to an outward operative position (Figure 1) in which the fan blade segments 30-32 project radially outwardly of the plate 12 to facilitate movement of air as the plate 12 is rotated by the electric motor 11. It is understood that the electric motor 11 can be either on top of or below the plate 12.
Each blade assembly 20- 23 is positioned on the periphery of the plate 12 via a mount 40 that is secured to the plate 12. As shown in Figure 2a the mounts 40 are equally spaced around the periphery of the plate to be diametrically opposed to one another.
In this embodiment the blade comprises three blade segments, namely the first outer segment 30, an
intermediate segment 31 that is telescopically mounted within the outer segment 30, and an inner blade tip 32 that is again telescopically mounted within the
intermediate section.
Each mount 40 comprises a pair of support legs 41, 42 having outwardly extending flanges 43, 44 that enable the legs to be screwed to the surface of the plate 12. The support legs 41, 42 support a bridging member 45 that defines a slot 46 that accommodates a first outer blade segment 30. The slot defines a passageway that allows the blade segments 30 to be a smooth sliding fit within the slot 46. The legs 41, 42 of the mount assembly are also arranged so that the slot is on an incline of between 10 and 15 degrees (see Figure 2b) . The angle on the slot gives the blade, which is otherwise flat, an angle of incidence to give the desired air movement when in the extended and operative position.
The blade segments 30, 31, 32 all slide relative to one another so that in the retracted position (Figure 2) the tip 32 is wholly within the intermediate segment 31 which is wholly within the outer segment 30. In the extended position shown in Figure 2 the tip 32 projects radially outwardly of the intermediate segment 31 which is in turn radially outwardly of the outer segment 30. The telescopic arrangement of the three blade segments allows the segments to slide outwardly and the force to urge this outward movement is the centrifugal force generated by rotation of the plate 12 by the electric motor 11.
Each diametrically opposed pair of blade assemblies 21, 22 or 23, 24 are interconnected by a chain 50 that rotates about a sprocket 51 located on the underside of each mount 40. The chain is also coupled to a centrally located sprocket 52 that is in turn coupled to a coil spring 53 located within a housing 54. The chain 50 is attached to an elongate rod 60 via an adjustable linkage.
As shown in Figure 6 the rod 60 extends parallel to the chain 50 and is coupled to an inner end of the outer
blade segment 32. Movement of the chain 50 pills the rod 60 radially inwards to pull the outer blade segment 32 into the intermediate segment 31 until the inner end of the blade segment 32 abuts stop 63 on the inner end of the intermediate segment 31. Further movement of the rod 60 causes inward displacement of the intermediate segment 31 until it engages stops 64 on the inner end of the first blade segment 30. Al these segments 30, 31, 32 are then pulled by the rod 60 under the mount 40 to assume the fully retracted position shown in Figure 2.
As the centrifugal force of the fan 10 forces the blade 30-32 segments outwardly the movement of the segments causes rotation of the sprocket 51 under the mount 40 to drive the chain 50 to in turn rotate the central sprocket 52 against the spring 53. As the fan 10 slows down the coil spring 53 urges the central sprocket 52 to rotate the chain 50 and pull back the fan segments 30-32 to the retracted position. In this manner, the sprocket and chain drive not only controls the outward movement of the fan segments but through the spring 53 brings the segments back into the retracted position when not in use. To avoid collision of the chains 50 two central sprockets 52 are provided in different vertical planes with the upper sprocket driving the fan blade assemblies 20 and 21 and the lower sprocket driving the other pair of fan blade assemblies 22 and 23.
The fan blade segments 30-32 are moulded in plastics to define leading and trailing edges. The blade segments 30-32 are substantially flat and the tip segment 32 has a curved end.
The fan described above has a number of advantages over conventional fans with retractable blades. Because the blades do not pivot from the operative to the
retracted positions there is no danger of collision
between the blades during the retraction process.
Furthermore, the fact that the blade segments expand radially or in a longitudinal sense means that the blades can be designed to have increased length to thereby increase the airflow. Furthermore, the telescopic location of the blade segments allows the fan to assume a compact and comparatively thin configuration in the retracted position which makes the fan, especially when it incorporates a light fitting, much more attractive in the retracted position than is the case with other fans with retractable blades where the blades form an unsightly nest above the light fitting.
In the claims which follow and in the preceding description of the invention, except where the context requires otherwise due to express language or necessary implication, the word "comprise" or variations such as "comprises" or "comprising" is used in an inclusive sense, i.e. to specify the presence of the stated features but not to preclude the presence or addition of further features in various embodiments of the invention.
Claims
A fan blade comprising a mount supporting a plurality of superimposed fan blade segments arranged to slide relative to one another from a retracted storage configuration to an extended operative configuration.
The fan blade according to claim 1 wherein the fan blade segments slide telescopically one within the other .
The fan blade according to either claim 1 or 2 wherein, the mount is adapted to be secured to a rotating plate whereby the fan blade, in the
operative configuration extends radially of the rotating plate .
The fan blade according to any one of the proceeding claims wherein the mount supports three fan blade segments, the outer blade segment defining a tip of the blade .
The fan blade according to any one of the preceding claims wherein the fan blade segments are
substantially flat.
A ceiling fan comprising an electric motor adapted to drive a rotating plate that supports a plurality of equally spaced fan blades that extend radially of the plate, each fan blade comprising a root and a tip joined by leading and trailing edges, the root being adapted to be secured to the plate, wherein each blade comprises a plurality of fan blade segments arranged to slide telescopically one within the other whereby the fan blade segments can be located substantially within the periphery of the plate in a
retracted configuration and can extend radially outwardly in an operative configuration.
7. The ceiling fan according to claim 6 wherein as the fan rotates the fan blade segments slide outwardly due to centrifugal forces.
8. The ceiling fan according to claim 7 wherein biasing means pulls the fan blade segments back into the retracted configuration against the centrifugal force as the fan slows down to a stop.
9. The ceiling fan according to claim 8 wherein opposed blades are interconnected by a chain driven by a sprocket including biasing means which rotates the chain to pull back the blade segments as the fan slows to a stop.
10. The ceiling fan according to any one of claims 6 to 9 wherein each blade has an angle of incidence to the horizontal, preferably between 10 and 15 degrees.
11. The ceiling fan according to any one of claims 6 to 10 wherein the rotating plate supports four equally spaced radially extending blades.
12. The ceiling fan according to any one of claims 6 to 11 wherein each blade is secured to the plate by a mount .
The ceiling fan according to claim 12 wherein the includes a slot through which the blade slides.
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SG11201408524YA SG11201408524YA (en) | 2012-07-02 | 2013-06-03 | Ceiling fan |
CA2876759A CA2876759A1 (en) | 2012-07-02 | 2013-06-03 | Ceiling fan |
EP13812591.9A EP2867535A4 (en) | 2012-07-02 | 2013-06-03 | Ceiling fan |
NZ702997A NZ702997A (en) | 2012-07-02 | 2013-06-03 | Ceiling fan |
US14/411,859 US20150167683A1 (en) | 2012-07-02 | 2013-06-03 | Ceiling Fan |
CN201380035513.XA CN104411979B (en) | 2012-07-02 | 2013-06-03 | Ceiling fan |
HK15110444.4A HK1209814A1 (en) | 2012-07-02 | 2015-10-23 | Ceiling fan |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2012902819A AU2012902819A0 (en) | 2012-07-02 | Ceiling fan | |
AU2012902819 | 2012-07-02 | ||
AU2013202271A AU2013202271B2 (en) | 2012-07-02 | 2013-04-02 | Ceiling Fan |
AU2013202271 | 2013-04-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2014005171A1 true WO2014005171A1 (en) | 2014-01-09 |
Family
ID=49881152
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/AU2013/000584 WO2014005171A1 (en) | 2012-07-02 | 2013-06-03 | Ceiling fan |
Country Status (10)
Country | Link |
---|---|
US (1) | US20150167683A1 (en) |
EP (1) | EP2867535A4 (en) |
CN (1) | CN104411979B (en) |
AU (1) | AU2013202271B2 (en) |
CA (1) | CA2876759A1 (en) |
HK (1) | HK1209814A1 (en) |
MY (1) | MY176019A (en) |
NZ (1) | NZ702997A (en) |
SG (1) | SG11201408524YA (en) |
WO (1) | WO2014005171A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11746796B1 (en) * | 2022-11-10 | 2023-09-05 | SmithGroup Companies, Inc. | Plenum fan with telescoping blades |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USD804629S1 (en) * | 2016-02-05 | 2017-12-05 | Hunter Fan Company | Ceiling fan |
CN106351859A (en) * | 2016-10-31 | 2017-01-25 | 张家港沙工科技服务有限公司 | Retractable storage type ceiling fan |
CN111810443A (en) * | 2016-12-31 | 2020-10-23 | 毛永波 | Telescopic invisible fan blade wind wheel and fan with sleeve piston cylinder |
CN107461349B (en) * | 2017-08-19 | 2019-04-09 | 浙江津海机械科技有限公司 | A kind of dual purpose fan |
CN110005623A (en) * | 2019-05-08 | 2019-07-12 | 青岛海尔空调器有限总公司 | Cross flow fan and air conditioner including the blower |
CN111207094B (en) * | 2020-02-24 | 2020-11-03 | 曹天远 | Axial flow fan of wide region regulation blade angle |
CN111828385A (en) * | 2020-08-04 | 2020-10-27 | 徐州徐工挖掘机械有限公司 | Radiator fan blade adjustable device |
CN112377442A (en) * | 2020-11-12 | 2021-02-19 | 常熟市耀华机械有限公司 | Fan for dust removal of textile mill |
CN113314991B (en) * | 2021-05-17 | 2022-06-17 | 姜永健 | Electric automatization has block terminal of heat dissipation function |
CN113623253A (en) * | 2021-09-15 | 2021-11-09 | 宁波大学 | Telescopic portable fan |
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US20070092376A1 (en) * | 2005-10-26 | 2007-04-26 | Malone Christopher G | Electronics cooling fan with collapsible fan blade |
CN201401354Y (en) * | 2009-04-27 | 2010-02-10 | 武汉市第十一中学 | Ceiling fan with retractable fan blades |
US20100034651A1 (en) * | 2008-08-11 | 2010-02-11 | Wiegel Aaron J | Ceiling fans with low solidity ratio |
US20110318202A1 (en) * | 2010-06-25 | 2011-12-29 | Martec Pty Ltd | Ceiling fan |
CN202132274U (en) * | 2011-06-27 | 2012-02-01 | 河海大学 | Electric fan with retractable fan blades |
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US5151011A (en) * | 1991-01-09 | 1992-09-29 | Beverly Hills Fan Company | Ceiling fan with interchangeable body |
US6213716B1 (en) * | 1999-11-19 | 2001-04-10 | King Of Fans, Inc. | Folding fan |
US20050249598A1 (en) * | 2004-05-05 | 2005-11-10 | Stanfield Young | Ceiling fan with multiple motors |
US7153100B2 (en) * | 2004-12-23 | 2006-12-26 | Fanimation, Inc. | Ceiling fan with retractable fan blades |
CN2842027Y (en) * | 2005-06-09 | 2006-11-29 | 上海市宝山区青少年科学技术指导站 | Ceiling fan blade stretching device |
SG163599A1 (en) * | 2005-07-13 | 2010-08-30 | Joe Villella | Combined light fitting and ceiling fan |
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CN201802664U (en) * | 2010-10-14 | 2011-04-20 | 杨中峰 | Electric fan with adjustable fan blades |
CN102278317A (en) * | 2010-10-26 | 2011-12-14 | 上海市黄浦区新凌小学 | Folding ceiling fan |
-
2013
- 2013-04-02 AU AU2013202271A patent/AU2013202271B2/en not_active Ceased
- 2013-06-03 EP EP13812591.9A patent/EP2867535A4/en not_active Withdrawn
- 2013-06-03 SG SG11201408524YA patent/SG11201408524YA/en unknown
- 2013-06-03 CN CN201380035513.XA patent/CN104411979B/en not_active Expired - Fee Related
- 2013-06-03 CA CA2876759A patent/CA2876759A1/en not_active Abandoned
- 2013-06-03 NZ NZ702997A patent/NZ702997A/en not_active IP Right Cessation
- 2013-06-03 WO PCT/AU2013/000584 patent/WO2014005171A1/en active Application Filing
- 2013-06-03 MY MYPI2014003421A patent/MY176019A/en unknown
- 2013-06-03 US US14/411,859 patent/US20150167683A1/en not_active Abandoned
-
2015
- 2015-10-23 HK HK15110444.4A patent/HK1209814A1/en unknown
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US20070092376A1 (en) * | 2005-10-26 | 2007-04-26 | Malone Christopher G | Electronics cooling fan with collapsible fan blade |
US20100034651A1 (en) * | 2008-08-11 | 2010-02-11 | Wiegel Aaron J | Ceiling fans with low solidity ratio |
CN201401354Y (en) * | 2009-04-27 | 2010-02-10 | 武汉市第十一中学 | Ceiling fan with retractable fan blades |
US20110318202A1 (en) * | 2010-06-25 | 2011-12-29 | Martec Pty Ltd | Ceiling fan |
CN202132274U (en) * | 2011-06-27 | 2012-02-01 | 河海大学 | Electric fan with retractable fan blades |
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Title |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11746796B1 (en) * | 2022-11-10 | 2023-09-05 | SmithGroup Companies, Inc. | Plenum fan with telescoping blades |
Also Published As
Publication number | Publication date |
---|---|
SG11201408524YA (en) | 2015-01-29 |
AU2013202271A1 (en) | 2014-01-16 |
MY176019A (en) | 2020-07-21 |
CN104411979B (en) | 2019-04-16 |
CN104411979A (en) | 2015-03-11 |
CA2876759A1 (en) | 2014-01-09 |
AU2013202271B2 (en) | 2015-12-24 |
EP2867535A1 (en) | 2015-05-06 |
US20150167683A1 (en) | 2015-06-18 |
HK1209814A1 (en) | 2016-04-08 |
NZ702997A (en) | 2017-03-31 |
EP2867535A4 (en) | 2016-03-02 |
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