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US20110162225A1 - Hair dryer, an attachment for a hair dryer, and a hair dryer provided with such an attachment - Google Patents

Hair dryer, an attachment for a hair dryer, and a hair dryer provided with such an attachment Download PDF

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Publication number
US20110162225A1
US20110162225A1 US13/062,314 US200913062314A US2011162225A1 US 20110162225 A1 US20110162225 A1 US 20110162225A1 US 200913062314 A US200913062314 A US 200913062314A US 2011162225 A1 US2011162225 A1 US 2011162225A1
Authority
US
United States
Prior art keywords
flow guide
attachment
hair dryer
air
stream
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
Application number
US13/062,314
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English (en)
Inventor
Wolfgang Obermann
Adolf Ramusch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koninklijke Philips NV
Original Assignee
Koninklijke Philips Electronics NV
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Koninklijke Philips Electronics NV filed Critical Koninklijke Philips Electronics NV
Assigned to KONINKLIJKE PHILIPS ELECTRONICS N.V. reassignment KONINKLIJKE PHILIPS ELECTRONICS N.V. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: OBERMANN, WOLFGANG, RAMUSCH, ADOLF
Publication of US20110162225A1 publication Critical patent/US20110162225A1/en
Abandoned legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45D—HAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
    • A45D20/00—Hair drying devices; Accessories therefor
    • A45D20/04—Hot-air producers
    • A45D20/08—Hot-air producers heated electrically
    • A45D20/10—Hand-held drying devices, e.g. air douches
    • A45D20/12—Details thereof or accessories therefor, e.g. nozzles, stands
    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45D—HAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
    • A45D20/00—Hair drying devices; Accessories therefor
    • A45D20/04—Hot-air producers
    • A45D20/08—Hot-air producers heated electrically
    • A45D20/10—Hand-held drying devices, e.g. air douches
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H3/00—Air heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H3/00—Air heaters
    • F24H3/02—Air heaters with forced circulation
    • F24H3/04—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element
    • F24H3/0405—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between
    • F24H3/0423—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between hand-held air guns
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/0052—Details for air heaters
    • F24H9/0057—Guiding means
    • F24H9/0063—Guiding means in air channels

Definitions

  • the present invention relates to hair dryers and to an attachment for a hair dryer.
  • hair dryers for consumer use.
  • the primary consideration for such hair dryers is that they provide a flow of heated air in a sufficient quantity to evaporate water from the user's hair.
  • blower or ventilator that directs air over a heating device, such as a resistance coil, and then to an outlet.
  • a heating device such as a resistance coil
  • Hair dryers in particular hand-held hair dryers, have been in general use for many years, and have found wide acceptance in the consumer market. As the market has matured, commercial success has demanded an increased ability to perform the hair dryer's main task, that is, drying hair, while providing a device that is quiet, safe and comfortable to use.
  • U.S. Pat. No. 5,841,943 a pulsating attachment for use with an electric hair dryer is disclosed.
  • the pulsating attachment can be attached to a tubular end of the hair dryer.
  • the attachment comprises an asymmetric and unbalanced rotatable impeller for rotating as a single fan blade which blocks part of the exit area.
  • the expelled air rotates the impeller or fan blade creating a pulsating spiral flow in which an area of heated air travels in a spiraling manner around a central axis of the hair dryer.
  • an area of heated air travels in a spiraling manner around a central axis of the hair dryer.
  • the present invention aims to provide a hair dryer, an attachment for a hair dryer and a hair dryer provided with such an attachment that provides an improved drying performance while maintaining the temperature of the expelled air within safety limits and that is safe and comfortable to use.
  • an attachment for a hair dryer comprising a coupling means being adapted to be coupled to an outlet of said hair dryer for expelling a stream of air, and a flow guide means having a fixed flow guide surface for guiding the stream of air, said flow guide surface being, at least partly, angled with respect to a central axis of the attachment.
  • the angled flow guide surface will provide the air with a substantially tangentially directed velocity component in addition to a velocity component which is in the same direction as the central axis of the attachment, i.e. the principal direction of flow of the stream of air.
  • This mixing effect in turn has the effect that the temperature of the stream of air being expelled by the hair dryer will be equalized and only a relatively minor temperature gradient will be present over a cross-section of the stream of air, where the lowest temperature can be found at an interface of the air from the hair dryer and the ambient air.
  • Another advantage of the equalized temperature distribution in the stream of air is that due to the absence of hotspots the same amount of heat can be transferred to a reduced flow of air. This will not only reduce the power consumption of the hair dryer, but will also in particular reduce the amount of noise produced by the hair dryer. Alternatively, a more powerful hair dryer can be provided in which more heat is transferred to the flow of air, i.e. the flow of air is maintained the same but the heater transfers more heat.
  • the flow guide means comprise a number of flow guide vanes which extend radially inward within an inner circumference of the attachment.
  • the use of vanes allows the stream of air to be expelled from the hair dryer in the most unrestricted way possible, by only deflecting the stream of air.
  • the flow guide means comprise a number of flow guide vanes which extend radially inward within an inner circumference of the coupling means.
  • the use of vanes allows the stream of air to be expelled from the hair dryer in the most unrestricted way possible, by only deflecting the stream of air. Having the flow guide vanes extending within an inner circumference of the coupling means reduces the overall size of the attachment which is more comfortable to use and easier to store.
  • the flow guide vanes are twisted, in particular helically twisted, around their respective longitudinal axis. In this manner the amount of deflection or amount of tangential velocity component is given to the stream of air being expelled from the hair dryer can more easily be controlled.
  • the flow guide vanes are twisted along their respective longitudinal axis such, that part of the flow guide surface is substantially parallel to the central axis of the attachment and part of the flow guide surface is substantially perpendicular to the central axis of the attachment. This will ensure that part of the stream of air still has a predominant velocity component that is in the same direction as the central axis of the attachment, and consequently in the direction that the hair dryer is aimed at, which in turn ensures that the stream of air maintains a good overall speed.
  • part of the flow guide surface such that it is substantially perpendicular to the central axis of the attachment, part of the air stream is given a strong tangential component yielding the advantageous mixing effect.
  • the flow guide surface is substantially perpendicular to the central axis of the attachment near a distal end of the flow guide vanes.
  • the flow guide surface is substantially parallel to the central axis of the attachment near the central axis. Both alternatives are believed to provide good mixing results.
  • the flow guide means are provided in a sunburst, so that the tangential velocity component imparted to the stream is independent on the location where the stream of air is expelled.
  • a hair dryer comprising a housing with an inlet and an outlet for a stream of air to flow through, said housing enclosing a ventilator drivable by a drive motor for flowing the stream of air through the housing, and a heater for heating said stream of air, and coupled to the outlet, an attachment according to any of the previous claims.
  • a hair dryer comprises a housing having a central axis, said housing comprising an outlet for a stream of air to flow through, and a flow guide means.
  • the flow guide means comprises a static flow guide surface for guiding the stream of air, said flow guide surface being, at least partly, angled with respect to the central axis of the housing.
  • the flow guide means belonging to the third aspect of the invention can be seen to embody the same inventive concept as the flow guide means in all the embodiments of the attachment as described above and consequently exhibits the same advantages. These are not repeated here to avoid unnecessary repetition.
  • FIG. 1 shows a hair dryer with schematically depicted temperature profiles of a conventional hair dryer and a hair dryer with an attachment according to the invention
  • FIG. 2 shows schematically an outlet of a hair dryer with an attachment according to the invention
  • FIG. 3A shows in a front elevation an attachment according to the invention
  • FIG. 3B shows in a perspective view the attachment of FIG. 3A .
  • FIG. 4 shows a temperature distribution over a cross-section A-A in FIG. 1 .
  • FIG. 1 shows in a side elevation a hair dryer 1 which comprises a housing 2 having an inlet 3 for air to enter the housing 2 .
  • the hair dryer further comprises an outlet 4 through which air can be expelled from the hair dryer 1 .
  • the housing 2 further comprises a handle 5 on which several switches 6 are provided.
  • the switches 6 are used for controlling the hair dryer 1 , and may comprise an ON-OFF switch, a speed switch and a temperature control switch for example.
  • Inside the housing 2 there is provided a drive motor that drives a ventilator or blower that accelerates the air that entered the housing 2 through inlet 3 towards the outlet 4 and across a heater (not shown) that heats the air if so required.
  • the drive motor is an electrical motor that is powered using the mains, but a battery powered hair dryer is also conceivable.
  • FIG. 1 further schematically shows as indicated by arrows 10 how a hot stream of air is expelled from the outlet 4 of the hair dryer 1 .
  • the stream of air has a substantially conical cross-section indicated by the dashed boundary lines 11 .
  • the cross-section of the stream of air increases along the longitudinal direction or central axis X of the housing 2 , indicated by a dashed line, due to interaction with ambient air, slowing the stream of air down and entraining ambient air in the stream of air.
  • a cross-section A-A through the stream of air is indicated.
  • Temperature profile I is a typical temperature profile as found in a conventional hair dryer. Such a hair dryer comprises an outlet which may be fully opened toward the surroundings, but often is provided with a grating to prohibit easy access the in the internal workings of the hair dryer from the outside.
  • the temperature T (without scale, refer to FIG. 4 for an example showing temperatures) of the stream of air in cross-section A-A is given.
  • profile I has a very distinct profile which shows a global maximum value Max 1 , a local minimum value Min 2 located on the central axis X and a minimum value Min 1 which can be found on the conical boundary line 11 . In practice this means that a user using the conventional hair dryer will experience so-called hotspots in the stream of air that is expelled from the hair dryer.
  • the maximum temperature of the stream of air is limited, for example to a maximum of 100° C.
  • this maximum is the value of Max 1 .
  • the amount of heat supplied by the heater to the stream of air is limited by the value of Max 1 and consequently, also due to the hotspots, a far from optimal drying action is achieved.
  • Another problem associated with the conventional hair dryer is that the amount of heat that can be transferred to stream of air is limited by the occurrence of the hotspots.
  • the further problem of the occurrence of hotspots in more conventional hair dryers is also solved by the present invention, as the inventors realized that by mixing the stream of air when it is being expelled from the hair dryer, the mixing that will occur will equalize the temperature distribution and consequently reduce or even remove the occurrence of hotspots.
  • temperature profile II This is depicted by temperature profile II where it can be seen that a more flattened temperature profile is obtained. This will be explained in more detail referring to FIGS. 2 through 4 .
  • FIG. 2 shows in cross-section the outlet 4 of the hair dryer 1 of FIG. 1 .
  • a stream of air is flowing through the housing 2 .
  • an attachment 20 which comprises a coupling means 21 , hereinafter referred to as a coupling frame 21 , provided with a flange 22 and a recess 23 which abuts an inner surface 24 of the outlet 4 .
  • the recess 23 may be provided with an annular groove 25 .
  • the attachment further comprises a flow guide means generally denoted by reference numeral 30 .
  • the flow guide means 30 comprises a number of flow guide vanes 31 which extend radially inward within an inner circumference of the coupling frame 21 .
  • the flow guide vanes 31 can be considered to extend radially inward from an inner surface of the housing 2 .
  • the coupling frame 21 has a circular cross-section.
  • other cross-sections are also conceivable depending on the specific design of the outlet 4 of the hair dryer 1 .
  • the flow guide vanes 31 are fixedly mounted in the coupling frame 21 , which is in turn fixedly coupled to the outlet 4 , and have a static flow guide surface 32 for guiding the stream of air.
  • the flow guide surface 32 is, at least partly, angled with respect to a central axis B of the coupling frame 21 .
  • the stream of air indicated by arrows 12 passes the attachment 20 under the influence of a non-shown blower and is given a tangential velocity component in addition to the longitudinal or principal velocity, as is indicated by arrows 13 and 13 ′, where arrows 13 in solid lines indicate the direction of flow at the upper half of the attachment and arrows 13 ′ in hatched lines indicate the direction of flow at the lower half of the attachment. It will be clear that consequently a rotational movement is provided to the stream of air that is expelled from the hair dryer 1 .
  • FIG. 3A A front elevation view of the attachment 20 in isolation is shown in FIG. 3A , also indicating with arrow 14 how stream of air being expelled from the hair dryer is rotating.
  • the flow guide vanes 31 are preferably helically twisted along their respective longitudinal axis h, which is only indicated in FIG. 3B for one flow guide vane 31 a , such that a part 33 of the flow guide surface 32 is substantially parallel to the central axis B of the coupling frame 21 and a part 34 of the flow guide 32 surface is substantially perpendicular to the central axis B of the coupling frame 21 .
  • the flow guide surface 32 is substantially perpendicular to the central axis B of the coupling frame 21 near the coupling frame 21 , or in other words near a distal end of the flow guide vanes 31 . This is more clearly shown in FIG. 3B .
  • the effect thereof will be that the area where the hotspots, i.e. the maximum temperature Max 1 , were found will be subjected to a larger mixing effect.
  • the equalizing effect of the attachment 20 and the tangential velocity component that is added to the stream of heated air being expelled from the hair dryer can be learned in more detail from FIG. 4 .
  • FIG. 4 shows a temperature distribution over a cross-section A-A in FIG. 1 , wherein the upper diagram shows the temperature distribution that corresponds to temperature profile I, and wherein the lower diagram shows the temperature distribution that corresponds to temperature profile II, i.e. the hair dryer provided with the attachment according to the present invention.
  • the temperature of the stream of air varies between 50 and 70° C.
  • the hair dryer without the attachment has a temperature profile with a temperatures ranging between 30 and 100° C., while in both cases the amount of heat transferred by the heater of the hair dryer has been kept the same.
  • the flow guide vanes 31 are shown to be evenly distributed and are all of the same or at least a similar design.
  • the present invention is however not limited thereto.
  • the way in that the flow guide vanes 31 are distributed in an irregular pattern which may contribute to increasing the amount of turbulence in the flow of air that is expelled through the outlet 4 of the hair dryer 1 .
  • the design of the flow guide vanes 31 is different for different for the individual flow guide vanes. This may also contribute increasing the amount of turbulence in the flow of air that is expelled through the outlet 4 of the hair dryer 1 .
  • the attachment comprises flow guide means which embodies the different aspects of the present invention.
  • the present invention is however not limited to the example of the attachment, but is equally applicable to a hair dryer comprising a housing, wherein the housing comprises a flow guide means that embodies the same inventive concept as the flow guide means in all its embodiments that is part of the attachment as described above and consequently exhibits the same advantages.
  • This embodiment of the present invention is not further depicted in the drawing to avoid unnecessary repetition, but it will be clear to a person skilled in the art how to provide the housing with the flow guide means according to the invention, for example by injection moulding in case the housing is made of a plastics material.
  • the attachment does not necessarily need to be provided with a coupling frame. It is also conceivable that the flow guide vanes may in some way couple with an inner surface of the housing, for example by means of a circumferential groove that houses (part of) a distal end of the flow guide vanes.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cleaning And Drying Hair (AREA)
US13/062,314 2008-09-08 2009-09-02 Hair dryer, an attachment for a hair dryer, and a hair dryer provided with such an attachment Abandoned US20110162225A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP08163831.4 2008-09-08
EP08163831A EP2160954A1 (fr) 2008-09-08 2008-09-08 Sèche-cheveux, fixation pour sèche-cheveux et sèche-cheveux doté d'une telle fixation
PCT/IB2009/053820 WO2010026531A2 (fr) 2008-09-08 2009-09-02 Sèche-cheveux, accessoire pour sèche-cheveux et sèche-cheveux doté d’un tel accessoire

Publications (1)

Publication Number Publication Date
US20110162225A1 true US20110162225A1 (en) 2011-07-07

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US13/062,314 Abandoned US20110162225A1 (en) 2008-09-08 2009-09-02 Hair dryer, an attachment for a hair dryer, and a hair dryer provided with such an attachment

Country Status (9)

Country Link
US (1) US20110162225A1 (fr)
EP (2) EP2160954A1 (fr)
JP (1) JP2012501714A (fr)
KR (1) KR20110076917A (fr)
CN (2) CN102143697A (fr)
DE (1) DE202009011793U1 (fr)
MX (1) MX2011002508A (fr)
RU (1) RU2506024C2 (fr)
WO (1) WO2010026531A2 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120266484A1 (en) * 2009-12-18 2012-10-25 Technofirst Hair dryer having a passive silencer system
US8732976B2 (en) 2011-04-15 2014-05-27 Kiss Nail Products, Inc. Rotating air directing apparatus for a hair dryer
US20170164710A1 (en) * 2015-12-11 2017-06-15 Dyson Technology Limited Motor and a hair care appliance comprising a motor
US11038385B2 (en) 2015-12-11 2021-06-15 Dyson Technology Limited Stator assembly
US11183895B2 (en) 2015-12-11 2021-11-23 Dyson Technology Limited Electric motor
US11523569B2 (en) * 2018-11-26 2022-12-13 Black & Decker, Inc. Concentrator attachment for blower air tube

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Publication number Priority date Publication date Assignee Title
CN102679553A (zh) * 2012-05-11 2012-09-19 常熟市天和陶瓷厂 一种用于热风机中的陶瓷分流器
JP6437745B2 (ja) 2014-06-20 2018-12-12 株式会社マキタ ノズル
CN104473416B (zh) * 2014-12-17 2017-11-07 新联电器厂有限公司 可调风向吹风机及其风向调节装置
KR101692484B1 (ko) * 2015-02-24 2017-01-04 유닉스전자주식회사 바람 진동 장치 및 이를 포함하는 헤어드라이어
GB2540203B (en) * 2015-07-10 2018-07-25 Dyson Technology Ltd Nozzle
GB2543537B (en) * 2015-10-21 2018-09-19 Dyson Technology Ltd A handheld appliance
GB2543751B (en) * 2015-10-21 2019-04-24 Dyson Technology Ltd Motor mount
US9883726B2 (en) * 2015-12-20 2018-02-06 Shih-Ling Hsu Hair dryer with improved outlet unit
CN106263451B (zh) * 2016-08-22 2019-08-20 山东理工大学 一种头发定型装置
US10660418B2 (en) 2017-07-14 2020-05-26 Spectrum Brands, Inc. Air-moving appliance including an attachment
BR112021006031A2 (pt) 2018-10-03 2021-06-29 Koninklijke Philips N.V. secador de cabelos operado por bateria
GB2608129B (en) * 2021-06-22 2024-06-05 Dyson Technology Ltd A haircare appliance

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US4132360A (en) * 1977-08-22 1979-01-02 General Electric Company Pulsating hair dryer
US5054211A (en) * 1990-11-05 1991-10-08 Shulman Burt H Hair dryer attachment for creating an orbiting stream of air
US5555637A (en) * 1994-10-14 1996-09-17 Production Engineered Designs, Inc. Drying apparatus
US5720107A (en) * 1993-12-23 1998-02-24 Braun Aktiengesellschaft Adjustable pulsator
US5841943A (en) * 1997-04-25 1998-11-24 Soundesign, Llc Ducted flow hair dryer with multiple impellers
US5839204A (en) * 1997-08-13 1998-11-24 Cinque; Brenda A Portable dryer with a retractable handle pitting into an indented housing
US5956863A (en) * 1999-01-08 1999-09-28 Allen; Donavan J. Hair dryer apparatus and method
US6038782A (en) * 1998-02-04 2000-03-21 Vital Hair Tools, Llc Blow dryer having airflow control means

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JPH07116016A (ja) * 1993-10-26 1995-05-09 Matsushita Electric Works Ltd 触媒燃焼温風器
EP1188392A1 (fr) * 2000-09-13 2002-03-20 Faco S.A. Embout pour sèche-cheveux
JP4338608B2 (ja) * 2004-09-07 2009-10-07 三洋電機株式会社 ヘアードライヤ

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Publication number Priority date Publication date Assignee Title
US3439204A (en) * 1965-06-23 1969-04-15 Sunbeam Corp Combination motor-blower unit for hair dryer
US4132360A (en) * 1977-08-22 1979-01-02 General Electric Company Pulsating hair dryer
US5054211A (en) * 1990-11-05 1991-10-08 Shulman Burt H Hair dryer attachment for creating an orbiting stream of air
US5720107A (en) * 1993-12-23 1998-02-24 Braun Aktiengesellschaft Adjustable pulsator
US5555637A (en) * 1994-10-14 1996-09-17 Production Engineered Designs, Inc. Drying apparatus
US5841943A (en) * 1997-04-25 1998-11-24 Soundesign, Llc Ducted flow hair dryer with multiple impellers
US5839204A (en) * 1997-08-13 1998-11-24 Cinque; Brenda A Portable dryer with a retractable handle pitting into an indented housing
US6038782A (en) * 1998-02-04 2000-03-21 Vital Hair Tools, Llc Blow dryer having airflow control means
US5956863A (en) * 1999-01-08 1999-09-28 Allen; Donavan J. Hair dryer apparatus and method

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120266484A1 (en) * 2009-12-18 2012-10-25 Technofirst Hair dryer having a passive silencer system
US8893400B2 (en) * 2009-12-18 2014-11-25 Technofirst Hair dryer having a passive silencer system
US8732976B2 (en) 2011-04-15 2014-05-27 Kiss Nail Products, Inc. Rotating air directing apparatus for a hair dryer
US20170164710A1 (en) * 2015-12-11 2017-06-15 Dyson Technology Limited Motor and a hair care appliance comprising a motor
US10064470B2 (en) * 2015-12-11 2018-09-04 Dyson Technology Limited Motor and a hair care appliance comprising a motor
US11038385B2 (en) 2015-12-11 2021-06-15 Dyson Technology Limited Stator assembly
US11183895B2 (en) 2015-12-11 2021-11-23 Dyson Technology Limited Electric motor
US11523569B2 (en) * 2018-11-26 2022-12-13 Black & Decker, Inc. Concentrator attachment for blower air tube
US20230072366A1 (en) * 2018-11-26 2023-03-09 Black & Decker Inc. Concentrator attachment for blower air tube
US11950543B2 (en) * 2018-11-26 2024-04-09 Black & Decker, Inc. Concentrator attachment for blower air tube
US20240245014A1 (en) * 2018-11-26 2024-07-25 Black & Decker Inc. Concentrator attachment for blower air tube
US12490688B2 (en) * 2018-11-26 2025-12-09 Black & Decker Inc. Concentrator attachment for blower air tube

Also Published As

Publication number Publication date
KR20110076917A (ko) 2011-07-06
CN102143697A (zh) 2011-08-03
DE202009011793U1 (de) 2009-12-03
WO2010026531A3 (fr) 2010-09-02
RU2011113539A (ru) 2012-10-20
WO2010026531A2 (fr) 2010-03-11
RU2506024C2 (ru) 2014-02-10
EP2160954A1 (fr) 2010-03-10
EP2323514A2 (fr) 2011-05-25
JP2012501714A (ja) 2012-01-26
MX2011002508A (es) 2011-04-07
CN201536752U (zh) 2010-08-04

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