US3300123A - Vane for an axial ventilator and method for producing the same - Google Patents

Vane for an axial ventilator and method for producing the same Download PDF

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Publication number
US3300123A
US3300123A US458341A US45834165A US3300123A US 3300123 A US3300123 A US 3300123A US 458341 A US458341 A US 458341A US 45834165 A US45834165 A US 45834165A US 3300123 A US3300123 A US 3300123A
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US
United States
Prior art keywords
vane
vanes
hub
impeller
base 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.)
Expired - Lifetime
Application number
US458341A
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English (en)
Inventor
Freyholdt Helmut
Aebischer Alfred
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.)
VENTILATOR AG
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VENTILATOR AG
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 VENTILATOR AG filed Critical VENTILATOR AG
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Publication of US3300123A publication Critical patent/US3300123A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/78—Making other particular articles propeller blades; turbine 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S416/00—Fluid reaction surfaces, i.e. impellers
    • Y10S416/03—Sheet metal
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49316—Impeller making
    • Y10T29/49336—Blade making

Definitions

  • the present invention has reference to an improved sheet metal blade or vane for axial blowers and to a new and improved method for the production of such vane.
  • a further important object of this invention has reference to an improved method of manufacturing vanes for use with axial ventilators and the like.
  • Another specific object of this invention concerns itself with the construction of an improved blade or vane for fluid-flow machinery, such as axial ventilators, which is relatively easy and inexpensive to manufacture, provides good operating efiiciency, is simple to mount to the hub of the impeller, even can b repositioned after mounting.
  • the vane or blade designed according to the teachings of the present invention generally comprises a folded sheet strip and exhibits a vane portion and a flexed, slightly arched i.e. slightly convexed base portion. It is to be understood that the inventive blade can be used for practically all ventilators, for instance wall ventilators.
  • the method of the invention for the manufacture of a sheet metal vane is generally characterized by the features that a sheet metal strip is cut substantially trapezoidal and stamped or otherwise formed into a twisted vane, at the wide end of the vane there is formed a base portion which is flexed at approximately right-angles to the vane proper. This base portion is then formed so as to possess a slightly arched configuration, i.e. is slightly convex, and the fold edge between vane portion and base portion defines the transition from a substantially cylindrical surface into a partial sphere or spherical shell.
  • inventive vane or blade construction it is possible to dispense with welding of the vane to the impeller hub, and, for example, to use a screw connection. Consequently, it is possible to use thin wall sheet metal e.g. aluminium as material for forming the inventive vanes.
  • FIGURE 1 is a perspective view of an impeller designed according to the teachings of the present invention wherein one vane has been removed to facilitate illustration of details of the impeller hub;
  • FIGURE 2 is a perspective view of a new and improved impeller vane designed according to the invention.
  • each inventive impeller vane 1 is composed of a thin-walled, bent sheet strip and possesses a twisted vane portion 3 and an arched e.g. slightly convex, flexed base portion 4 appropriately accommodated to the outer surface 2a of the impeller hub 2. It will be further observed that this base portion 4 exhibits a centering hole 5 arranged at the axis SS passing through the center of gravity of the vane portion 3.
  • a pivot bolt 15 or equivalent structure is receivable in the centering 'hole 5 and engages with a centering hole 8 (FIGURE 1) provided at the impeller hub 2.
  • Base portion 4 also is seen to possess two further apertures or holes 6 and 7.
  • non-illustrated nuts are threaded at the inner surface of the impeller hub 2 to the screws 11 and 12.
  • each vane 1 Since the pressed or stamped hollow substantially spherical-shaped base portion 4 of each vane 1 exhibits an internal radius corresponding to the outer'radius of the impeller hub 2, the vane 1, specifically its base por- 7 tion 4 snugly bears against the hub 2 in any given position. Such also permits adjustment of the angular position of the vane 1 about its prescribed axis of rotation, and with the aid of the slots 8 and 9 and the screws 11 and 12 respectively the desired position at the hub 2 is fixed. As previously mentioned each vane 1 is provided with a pivot pin 15 arranged in the centering hole 5 and extending out of the base portion 4 for engagement with a centering hole 8 of the hub 2, to thereby permit turning of the relevant vane 1 about its center of gravity axis SS.
  • the impeller hub can likewise be constructed of lighter weight than was previously the case.
  • the overall construction including shaft, bearings, housing and foundation can be made lighter, thereby bringing about a further saving in cost.
  • the inventive vane is considerably lighter than the known profiled vanes either cast or machined as solid bodies. This is likewise true for vanes formed of plastic, wood or other non-metallic materials.
  • a further advantage of the inventive sheet metal vane in comparison with known profiled vanes is the smoothness of its surface. While with known profiled vanes it is only possible to obtain a smooth surface by a subsequent costly treatment, for instance by polishing, the inventive vane makes it possible to even obtain a mirrorsmooth surface by proper selection of the vane sheet metal, and, thus, there can be obtained a vane with better efiiciency without additional processing.
  • the cast vanes constructed as profiled solid bodies require an extensive aftertreatment, among other things threading has to be cut for the attachment bolts, the vane edges at the inside and outside have to be exactly faced, and the axis of rotation has to be determined.
  • the inventive vane does not require any after-treating steps, resulting in a considerable saving in cost.
  • a further disadvantage of the cast profiled vanes not present with the inventive vane is the irregularity in the vane weight which unfavorably affects balancing, so that mounting of the impeller requires a great deal of time and effort. Due to the uniformity in weight of the inventive sheet vane mounting at the impeller is considerably simplified.
  • the inventive vane has its axis of rotation coinciding with the center of gravity axis turning of the vane does not result in any shifting of the center of gravity. This provides a considerable advantage since changing of the vane angle is possible without requiring subsequent balancing. With most of the cast, profiled vanes generally used in ventilators the axis of the attachment bolts does not coincide with the center of gravity axis of the vane, so that upon rotating the vane there is produced a new imbalance.
  • FIGURE 1 it will be recognized that it is possible without any considerable further cost to provide an angle adjustment scale 16 at the base portion 4 of the vane 1 which cooperates with a, marking 17 located at the impeller hub 2 in order to facilitate adjustment of the angle of attack of the vane 1. Consequently, the flexed base portion 4 not only permits turning of the vane 1 with constant position of its center of gravity, rather also very simple and exact adjustment of its position.
  • the good hearing or contact of the base portion 4 of the inventive vane 1 with the impeller hub 2 further provides tight sealing, this not being previously possible with rotatable profiled vanes without difiiculty. Air-tight sealing between vane 1 and impeller hub 2 provides higher efficiency and reduced air noise.
  • the hollow partial sphereshaped or arched base portion 4 constructed as an integral Component of the vane 1 strengthens this vane at the zone most subjected to load.
  • the fold edge or line 18 of the base portion 4 to a certain extent provides the transition of one partial sphere into a second partial sphere, so that even with relatively thin sheets there is imparted to this edge a particularly high strength and stiffness, Due to this substantially convex or spherical-shaped configuration of the base portion 4 of the vane 1 tensile and bending loads can be transmitted up to both connecting screws 11, 12 without deformation of base portion 4. Since the strongly curved base portions 4 are fixedly screwed to the region of the impeller hub 2 most subjected to load and serve as reinforcement of the hub it is possible to use a light-weight impeller construction.
  • the inventive vane construction should at least be equally eflicient in all respects to all previous. constructions, a uniform impeller gap can be obtained if from the start all vanes are formed somewhat short, whereby during mounting the vanes can be brought to the desired external diameter of the impeller by using underlays or supports formed of thin foils or sheets. This renders it possible to satisfactorily avoid subsequent working of the vane tips.
  • each base portion 4 of the vane 1 can be provided with the previously considered pin 15 engaging in an associated guide hole 8 provided at the impeller hub 2, such pin serving as pivot shaft or axis for the vane.
  • the present invention contemplates cutting a sheet metal strip into trapezoidal shape.
  • this sheet metal strip is pressed or otherwise formed into a twisted vane and at its wide end there is flexed at approximately right angles to the twisted vane portion the base portion 4.
  • the latter is formed so as to be slightly convex, whereby the fold line or edge 18 between vane portion 3 and base portion 4 forms the transition of a substantially cylindrical generated surface int-o a substantially partial sphere.
  • aerodynamic design of the sheet metal vanes is such that both lengthwise edges of the cut vane are linear.
  • impeller hub 2 of the inventive axial ventilator can be manufactured of sheet metal it is possible to construct this impeller hub 2 in such a manner that its forward portion 2b is eflective as an inflow hood, so that without any considerable increased cost there is obtained a combined impeller hub and inflow hood 2, 212 respectively.
  • the hollow spherical-shaped impeller hub 2 permits simple application of the balancing weights from one side both in the forward and also rea-r balancing planes, so that the impeller does not have to be removed from the balancing machine, as was previously the case, in order to be able to apply the balancing weights to the side facing the machine.
  • the impeller hub could be provided with a marking edge for the forward balancing plane.
  • the hollow spherical-shaped hub 2 enables adhesive application of the balancing weights 1'9; previously such always had to be either screwed or welded.
  • an axial flow impeller having an annular hub with an outer spherical shaped surface portion, a plurality of vane means mounted on the spherical shaped hub portion, each vane means comprising a folded sheet metal strip incorporating a vane portion and a base portion, said base portion having a substantially spherical shaped surface corresponding to that of said spherical shaped surface portion, means adjustably securing the base portion of said vanes to the spherical shaped surface portion, said means comprising a central centering means and a pair of clamp fasteners engaging slots in the spherical shaped hub surface portion whereby said vane means on the release of the securing means may be pivoted about the central centering means.
  • centering means is a pivot pin on said base portion and an opening in said spherical shaped surface portion for accepting said pin.
  • each base portion is provided with a scale for adjusting the angular position of said vane means at the impeller hub, said spherical shaped surface portion being provided with a respective surface marking cooperating with said scale of the associated vane means.
  • impeller hub is provided with an inflow hood in front of said plurality of vane means and an outflow collar behind said plurality of vane means.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US458341A 1964-05-29 1965-05-24 Vane for an axial ventilator and method for producing the same Expired - Lifetime US3300123A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH701264A CH423076A (de) 1964-05-29 1964-05-29 Schaufelrad für Axialgebläse und Verfahren zu dessen Herstellung

Publications (1)

Publication Number Publication Date
US3300123A true US3300123A (en) 1967-01-24

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
US458341A Expired - Lifetime US3300123A (en) 1964-05-29 1965-05-24 Vane for an axial ventilator and method for producing the same

Country Status (7)

Country Link
US (1) US3300123A (de)
AT (1) AT274214B (de)
CH (1) CH423076A (de)
DE (1) DE1503646A1 (de)
FR (1) FR1435418A (de)
GB (1) GB1068118A (de)
NL (1) NL6506525A (de)

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4221541A (en) * 1977-02-28 1980-09-09 Axial International Aktiengesellschaft Fan comprising a blade pitch control mechanism
US4610600A (en) * 1985-06-10 1986-09-09 Industrial Air, Inc. Adjustable-pitch axial fan wheel
US4936751A (en) * 1989-07-28 1990-06-26 Marshall John C Universal fan blade mount
US6431834B1 (en) 2000-08-30 2002-08-13 Prime Home Impressions, Llc Multi-connection, stable fan blade attachment mount
US20080227381A1 (en) * 2004-03-15 2008-09-18 Avedon Raymond B Columnar air moving devices, systems and methods
US20100266400A1 (en) * 2009-03-30 2010-10-21 Airius Ip Holdings, Llc Columnar air moving devices, systems and method
WO2011044908A1 (en) * 2009-10-13 2011-04-21 Novenco A/S An axial fan, fan rotor and method of manufacturing a rotor for an axial fan
US20140237819A1 (en) * 2013-02-25 2014-08-28 Greenheck Fan Corporation Methods for fan assemblies and fan wheel assemblies
US20140241868A1 (en) * 2013-02-25 2014-08-28 Greenheck Fan Corporation Fan assemblies and stator assemblies
US9151295B2 (en) 2008-05-30 2015-10-06 Airius Ip Holdings, Llc Columnar air moving devices, systems and methods
CN105275887A (zh) * 2014-07-25 2016-01-27 沃德(天津)传动有限公司 一种减速机及其轴流风扇
US9335061B2 (en) 2008-05-30 2016-05-10 Airius Ip Holdings, Llc Columnar air moving devices, systems and methods
US9459020B2 (en) 2008-05-30 2016-10-04 Airius Ip Holdings, Llc Columnar air moving devices, systems and methods
USD783795S1 (en) 2012-05-15 2017-04-11 Airius Ip Holdings, Llc Air moving device
US9631627B2 (en) 2004-03-15 2017-04-25 Airius Ip Holdings, Llc Columnar air moving devices, systems and methods
US9702576B2 (en) 2013-12-19 2017-07-11 Airius Ip Holdings, Llc Columnar air moving devices, systems and methods
USD805176S1 (en) 2016-05-06 2017-12-12 Airius Ip Holdings, Llc Air moving device
US9976560B2 (en) 2013-02-25 2018-05-22 Greenheck Fan Corporation Mixed flow fan assembly
USD820967S1 (en) 2016-05-06 2018-06-19 Airius Ip Holdings Llc Air moving device
US10024531B2 (en) 2013-12-19 2018-07-17 Airius Ip Holdings, Llc Columnar air moving devices, systems and methods
US10125783B2 (en) 2013-02-25 2018-11-13 Greenheck Fan Corporation Fan assembly and fan wheel assemblies
US10221861B2 (en) 2014-06-06 2019-03-05 Airius Ip Holdings Llc Columnar air moving devices, systems and methods
US10487852B2 (en) 2016-06-24 2019-11-26 Airius Ip Holdings, Llc Air moving device
USD885550S1 (en) 2017-07-31 2020-05-26 Airius Ip Holdings, Llc Air moving device
USD886275S1 (en) 2017-01-26 2020-06-02 Airius Ip Holdings, Llc Air moving device
USD887541S1 (en) 2019-03-21 2020-06-16 Airius Ip Holdings, Llc Air moving device
US11598539B2 (en) 2019-04-17 2023-03-07 Airius Ip Holdings, Llc Air moving device with bypass intake

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2291134B (en) * 1994-07-02 1998-07-22 Nuaire Ltd Fan assembly

Citations (13)

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Publication number Priority date Publication date Assignee Title
US525928A (en) * 1894-09-11 Ventilating fan
US984812A (en) * 1910-01-15 1911-02-21 John W Hearst Propeller-wheel for airships.
GB167581A (en) * 1920-05-11 1921-08-11 Peter Brotherhood Ltd Improvements in fans
US1476137A (en) * 1923-05-24 1923-12-04 Bilan John Fan structure for air-cooled motors
US1603076A (en) * 1922-11-27 1926-10-12 Motor Player Corp Means and method for dynamically balancing incased fan blades
GB631231A (en) * 1947-12-10 1949-10-28 Aerex Ltd Improvements relating to cased screw fans
GB702312A (en) * 1952-05-27 1954-01-13 Davidson & Co Ltd Improvements in or relating to axial flow fans and the like
FR1121516A (fr) * 1953-05-26 1956-08-20 Hélices et distributeurs pour ventilateurs axiaux et turbines
DE949899C (de) * 1942-03-29 1956-09-27 Eduard Dufey Dipl Ing Axialgeblaese oder -pumpe mit Schwenkbaren Laufschaufeln
US2915238A (en) * 1953-10-23 1959-12-01 Szydlowski Joseph Axial flow compressors
US2985952A (en) * 1961-05-30 Method of construction of three dimensional
US3085632A (en) * 1959-12-08 1963-04-16 Ametek Inc Fan
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Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US525928A (en) * 1894-09-11 Ventilating fan
US2985952A (en) * 1961-05-30 Method of construction of three dimensional
US984812A (en) * 1910-01-15 1911-02-21 John W Hearst Propeller-wheel for airships.
GB167581A (en) * 1920-05-11 1921-08-11 Peter Brotherhood Ltd Improvements in fans
US1603076A (en) * 1922-11-27 1926-10-12 Motor Player Corp Means and method for dynamically balancing incased fan blades
US1476137A (en) * 1923-05-24 1923-12-04 Bilan John Fan structure for air-cooled motors
DE949899C (de) * 1942-03-29 1956-09-27 Eduard Dufey Dipl Ing Axialgeblaese oder -pumpe mit Schwenkbaren Laufschaufeln
GB631231A (en) * 1947-12-10 1949-10-28 Aerex Ltd Improvements relating to cased screw fans
GB702312A (en) * 1952-05-27 1954-01-13 Davidson & Co Ltd Improvements in or relating to axial flow fans and the like
FR1121516A (fr) * 1953-05-26 1956-08-20 Hélices et distributeurs pour ventilateurs axiaux et turbines
US2915238A (en) * 1953-10-23 1959-12-01 Szydlowski Joseph Axial flow compressors
US3085632A (en) * 1959-12-08 1963-04-16 Ametek Inc Fan
US3201857A (en) * 1963-03-21 1965-08-24 Torrington Mfg Co Method of making fan with slinger ring

Cited By (53)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4221541A (en) * 1977-02-28 1980-09-09 Axial International Aktiengesellschaft Fan comprising a blade pitch control mechanism
US4610600A (en) * 1985-06-10 1986-09-09 Industrial Air, Inc. Adjustable-pitch axial fan wheel
US4936751A (en) * 1989-07-28 1990-06-26 Marshall John C Universal fan blade mount
US6431834B1 (en) 2000-08-30 2002-08-13 Prime Home Impressions, Llc Multi-connection, stable fan blade attachment mount
US9631627B2 (en) 2004-03-15 2017-04-25 Airius Ip Holdings, Llc Columnar air moving devices, systems and methods
US9714663B1 (en) 2004-03-15 2017-07-25 Airius Ip Holdings, Llc Temperature destratification systems
US10487840B2 (en) 2004-03-15 2019-11-26 Airius Ip Holdings, Llc Temperature destratification systems
US12085084B2 (en) 2004-03-15 2024-09-10 Airius Ip Holdings, Llc Temperature destratification systems
US11703062B2 (en) 2004-03-15 2023-07-18 Airius Ip Holdings, Llc Temperature destratification systems
US11365743B2 (en) 2004-03-15 2022-06-21 Airius Ip Holdings, Llc Temperature destratification systems
US11053948B2 (en) 2004-03-15 2021-07-06 Airius Ip Holdings, Llc Temperature destratification systems
US20080227381A1 (en) * 2004-03-15 2008-09-18 Avedon Raymond B Columnar air moving devices, systems and methods
US9970457B2 (en) 2008-05-30 2018-05-15 Airius Ip Holdings, Llc Columnar air moving devices, systems and methods
US9459020B2 (en) 2008-05-30 2016-10-04 Airius Ip Holdings, Llc Columnar air moving devices, systems and methods
US9151295B2 (en) 2008-05-30 2015-10-06 Airius Ip Holdings, Llc Columnar air moving devices, systems and methods
US9335061B2 (en) 2008-05-30 2016-05-10 Airius Ip Holdings, Llc Columnar air moving devices, systems and methods
US20100266400A1 (en) * 2009-03-30 2010-10-21 Airius Ip Holdings, Llc Columnar air moving devices, systems and method
US8616842B2 (en) 2009-03-30 2013-12-31 Airius Ip Holdings, Llc Columnar air moving devices, systems and method
CN102639876B (zh) * 2009-10-13 2016-08-10 诺克有限公司 轴流式风扇、风扇转子以及制造风扇转子的方法
US9273696B2 (en) 2009-10-13 2016-03-01 Novenco A/S Axial fan, fan rotor and method of manufacturing a rotor for an axial fan
CN102639876A (zh) * 2009-10-13 2012-08-15 诺克有限公司 轴流式风扇、风扇转子以及制造风扇转子的方法
WO2011044908A1 (en) * 2009-10-13 2011-04-21 Novenco A/S An axial fan, fan rotor and method of manufacturing a rotor for an axial fan
US10184489B2 (en) 2011-06-15 2019-01-22 Airius Ip Holdings, Llc Columnar air moving devices, systems and methods
USD926963S1 (en) 2012-05-15 2021-08-03 Airius Ip Holdings, Llc Air moving device
USD783795S1 (en) 2012-05-15 2017-04-11 Airius Ip Holdings, Llc Air moving device
US9505092B2 (en) * 2013-02-25 2016-11-29 Greenheck Fan Corporation Methods for fan assemblies and fan wheel assemblies
US10125783B2 (en) 2013-02-25 2018-11-13 Greenheck Fan Corporation Fan assembly and fan wheel assemblies
US10184488B2 (en) * 2013-02-25 2019-01-22 Greenheck Fan Corporation Fan housing having flush mounted stator blades
US20140241868A1 (en) * 2013-02-25 2014-08-28 Greenheck Fan Corporation Fan assemblies and stator assemblies
US9976560B2 (en) 2013-02-25 2018-05-22 Greenheck Fan Corporation Mixed flow fan assembly
US20140237819A1 (en) * 2013-02-25 2014-08-28 Greenheck Fan Corporation Methods for fan assemblies and fan wheel assemblies
US10024531B2 (en) 2013-12-19 2018-07-17 Airius Ip Holdings, Llc Columnar air moving devices, systems and methods
US11092330B2 (en) 2013-12-19 2021-08-17 Airius Ip Holdings, Llc Columnar air moving devices, systems and methods
US11221153B2 (en) 2013-12-19 2022-01-11 Airius Ip Holdings, Llc Columnar air moving devices, systems and methods
US9702576B2 (en) 2013-12-19 2017-07-11 Airius Ip Holdings, Llc Columnar air moving devices, systems and methods
US10641506B2 (en) 2013-12-19 2020-05-05 Airius Ip Holdings, Llc Columnar air moving devices, systems and methods
US10655841B2 (en) 2013-12-19 2020-05-19 Airius Ip Holdings, Llc Columnar air moving devices, systems and methods
US11713773B2 (en) 2014-06-06 2023-08-01 Airius Ip Holdings, Llc Columnar air moving devices, systems and methods
US10724542B2 (en) 2014-06-06 2020-07-28 Airius Ip Holdings, Llc Columnar air moving devices, systems and methods
US11236766B2 (en) 2014-06-06 2022-02-01 Airius Ip Holdings Llc Columnar air moving devices, systems and methods
US10221861B2 (en) 2014-06-06 2019-03-05 Airius Ip Holdings Llc Columnar air moving devices, systems and methods
CN105275887A (zh) * 2014-07-25 2016-01-27 沃德(天津)传动有限公司 一种减速机及其轴流风扇
USD805176S1 (en) 2016-05-06 2017-12-12 Airius Ip Holdings, Llc Air moving device
USD820967S1 (en) 2016-05-06 2018-06-19 Airius Ip Holdings Llc Air moving device
US11105341B2 (en) 2016-06-24 2021-08-31 Airius Ip Holdings, Llc Air moving device
US11421710B2 (en) 2016-06-24 2022-08-23 Airius Ip Holdings, Llc Air moving device
US10487852B2 (en) 2016-06-24 2019-11-26 Airius Ip Holdings, Llc Air moving device
USD886275S1 (en) 2017-01-26 2020-06-02 Airius Ip Holdings, Llc Air moving device
USD885550S1 (en) 2017-07-31 2020-05-26 Airius Ip Holdings, Llc Air moving device
USD887541S1 (en) 2019-03-21 2020-06-16 Airius Ip Holdings, Llc Air moving device
US11598539B2 (en) 2019-04-17 2023-03-07 Airius Ip Holdings, Llc Air moving device with bypass intake
US11781761B1 (en) 2019-04-17 2023-10-10 Airius Ip Holdings, Llc Air moving device with bypass intake
US12259156B2 (en) 2019-04-17 2025-03-25 Airius Ip Holdings, Llc Air moving device with bypass intake

Also Published As

Publication number Publication date
AT274214B (de) 1969-09-10
FR1435418A (fr) 1966-04-15
CH423076A (de) 1966-10-31
NL6506525A (de) 1965-11-30
GB1068118A (en) 1967-05-10
DE1503646A1 (de) 1969-02-13

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