US20140140861A1 - Standalone portable electric blower with variable air exit speed - Google Patents

Standalone portable electric blower with variable air exit speed Download PDF

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Publication number
US20140140861A1
US20140140861A1 US14/009,498 US201214009498A US2014140861A1 US 20140140861 A1 US20140140861 A1 US 20140140861A1 US 201214009498 A US201214009498 A US 201214009498A US 2014140861 A1 US2014140861 A1 US 2014140861A1
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United States
Prior art keywords
portable electric
blower according
electric blower
air
assembly
Prior art date
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Abandoned
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US14/009,498
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English (en)
Inventor
Roger Pellenc
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Pellenc SAS
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Pellenc SAS
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Publication date
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Assigned to PELLENC (SOCIETE ANONYME) reassignment PELLENC (SOCIETE ANONYME) ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: PELLENC, ROGER
Publication of US20140140861A1 publication Critical patent/US20140140861A1/en
Abandoned legal-status Critical Current

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    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01GHORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G20/00Cultivation of turf, lawn or the like; Apparatus or methods therefor
    • A01G20/40Apparatus for cleaning the lawn or grass surface
    • A01G20/43Apparatus for cleaning the lawn or grass surface for sweeping, collecting or disintegrating lawn debris
    • A01G20/47Vacuum or blower devices
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L5/00Structural features of suction cleaners
    • A47L5/12Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum
    • A47L5/14Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum cleaning by blowing-off, also combined with suction cleaning
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01HSTREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING OR PREVENTING FOG IN GENERAL CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS
    • E01H1/00Removing undesirable matter from roads or like surfaces, with or without moistening of the surface
    • E01H1/08Pneumatically dislodging or taking-up undesirable matter or small objects; Drying by heat only or by streams of gas; Cleaning by projecting abrasive particles
    • E01H1/0809Loosening or dislodging by blowing ; Drying by means of gas streams
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00Pumping installations or systems
    • F04D25/02Units comprising pumps and their driving means
    • F04D25/06Units comprising pumps and their driving means the pump being electrically driven
    • F04D25/0673Battery powered
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/40Casings; Connections of working fluid
    • F04D29/52Casings; Connections of working fluid for axial pumps
    • F04D29/54Fluid-guiding means, e.g. diffusers

Definitions

  • the present invention concerns a standalone portable electric blower with variable air exit speed. It applies in particular to equipment of this type intended tot sweeping and/or cleaning by an blast, of large surfaces such as, for example, lawns, urban streets, outside parking areas, sports or playgrounds, etc.
  • the result obtained by use of such equipment is analog to that obtained by using a traditional broom or rake, but the work is much less fatiguing and incomparably faster.
  • utilization of such a machine consists of pushing the trash scattered over the ground and lying partly under obstacles such as parked vehicles, to form a heap or window which is then picked up by a suction device, a wad sweeper or a mixer.
  • Such devices are usually found to be in the form of a portable unit which is hand-held and ma be supported by a harness. In practice, they are used while constantly adapting, the airflow speed to the condition of the treated surface. These devices may be designed for professional usage as well as for individual domestic use.
  • These devices comprise primarily an airflow guiding conduit, featuring a proximal air inlet portion or suction pipe, a distal air outlet part or exhaust pipe and an air blowing device positioned inside the intermediary part of the pipe.
  • This air blowing device ensures the suction of air and its delivery in the form of an airflow characterized by an air output and an air speed at the exhaust of the device.
  • the blower or the air blowing device of existing machines is driven by a thermal engine or by a universal electric motor with brushes. It is mostly constituted by a centrifugal turbine.
  • Existing machines operating with a thermal engine are heavy (weights exceeding 4.5 kg in operation), cumbersome, noisy (noise above 100 dB), polluting (using fuel), and generating a significant gyroscopic effect during speed fluctuations considering the variety of rotating parts and their significant inertia due to their weight.
  • Devices using an electric motor are most of the time powered through a power cable from the power grid, or they come in the form of small, battery-powered blowers but with low capacity. Such electric devices are therefore used more for domestic applications, but are not practical for use by professionals working in public spaces or large areas, on account of their small operational range.
  • an electric and portable air blower which is constituted by an elongated support tube the proximal end of which is equipped with a control handle and the distal end of which supports the active components of the device including an electric motor, a fan or compressor and air flow rectifiers. These components are housed in a conduit that is concentrically placed around the distal end of the support tube, this conduit featuring an air inlet and an air outlet. It is expected that said conduit be preferably made of moldable plastic material of a type currently used for molding of various rigid, objects and not of any special plastic material, that is to say of a material with no properties of thermal conductivity.
  • the blowing conduit is made of an insulating material which prevents dissipation of the heat generated by the operation of the motor and the fan.
  • the proximal portion of the tube in which the active components of the blower are located does not perform any function of dissipating the heat produced by the operation of the motor and the fan.
  • the invention aims in particular at making available to users a portable electric blower that is quiet, lightweight, well balanced, without effects of inertia or gyroscopic effects running counter to holding the device while in operation and eliminating the effects of discomfort while using such tools, not to mention the risks of trauma over time to the operators' wrists. It must be taken into consideration that sometimes the tool is carried by the operator for several hours, with the result that this tool which is supposed to make work easier for the operator, can cause more severe muscular pain than the use of a rake, if the tool weighs too much.
  • Another aim of the invention is the embodiment of a portable electric blower with low-noise operation, of simple construction, featuring means for quick modulation of the air flow exiting from the device, this air flow being directed and structured.
  • a standalone portable electric blower featuring at least one axial propeller generating an air flow and driven by an electric motor powered by a current source
  • said blower comprising an air-guide conduit consisting of a succession of three tubular parts of a generally cylindrical shape, namely a proximal part or suction nozzle with an air inlet, a distal air outlet part or exhaust pipe and a central or intermediary part characterized in that the central part is a separate piece and is fitted so as to constitute a functional assembly, solid bloc or consisting of an assembly of a number of elements and made of a material that is a good heat conductor, said assembly featuring the following functional sub-assemblies:
  • the functional assembly features also the following functional sub-assemblies
  • the central functional assembly includes also a passageway housing the electrical cable(s) of the motor connecting the electronic board and the electric motor.
  • a major advantage of the invention is to bring together all elements necessary for the functions of the tool in its central pan.
  • This arrangement makes it possible in particular to achieve three functions: the function of mechanical support for all the elements required for the functions of the tool; the function of rectifier of the air flow generated by the propeller; the function of heat exchanger enabling good dissipation of the heat generated b the motor and the electronic board and it makes it easy to perform functional tests prior to the complete assembly of the device.
  • said suction nozzle presents, upstream of the axial fan, an elbow the proximal end of which, demarcating the air inlet, is directed downward, considering a working position of the blower according to which the blower is directed forward and the operating handle of the blower is placed on top of the blower.
  • the operating handle of the blower is placed above the central part fitted to constitute the functional assembly, preferably positioned above the center of gravity (G) of the device, considering a working position of the blower according to which the blower is directed forward.
  • the operating handle also incorporates the control elements of the device, namely a trigger, a secondary electronic board for analyzing the position of said trigger, as well as an air speed selector and a device for displaying this speed managed by said secondary electronic board so that the position of said trigger can define, an air speed proportional to the maximum speed set by the selector, in connection with the management control board of the tool and of motor guidance.
  • It also includes the link with the electric power cable connected to a battery. This cable is provided, at its end, with the removable connector plug to the battery pack carried by the operator Or with an exterior power source, and may incorporate, furthermore, a quick connect/disconnect plug of the tool so that the operator can quickly free the tool from its connection with the battery.
  • control handle is made of two half shells capable, once they are assembled, of providing a rapid fastening of all the elements of the tool to each other, but also to ensure the definitive design form of the tool. It will be completed by a housing that is adapted as well to the shell of the tool and to covering the electronic board in order to protect it, but also to provide for its inspection for maintenance purposes, if necessary, without taking the whole tool apart.
  • blower has also these advantages:
  • the blowing device is constituted by the assembly of several pans, namely: the exterior housing, the housing of the fan motor, the guide vanes of the air flow and the support of the electronic component.
  • the electronic component is connected to the guide vanes through the intemedially of other components of the heat pipe or heat conductor type. This results in a low level of removal of the heat generated by the fan motor and the electronic component.
  • Devices of this kind are, in practice, intended for cooling of electronic components as described in the US-2006/0.237.169 patent, where the cooling functions predominate over the generation of a significant air flow which is better suitable for blowing. These devices function also in a fixed manner with a low power supply (less than 100 W in general), but in a continual manner with little no need for modulating the air flows and speeds.
  • the invention aims at providing, a lightweight and compact air blowing device that is high-performing, of simple and economical construction, generating low inertia and a quasi-non-existent gyroscopic effect, an air flow drawn at high speed with excellent ventilating output so as to considerably increase the range of a device powered by a battery, for example a Lithium-ton or a Lithium-Polymer battery of high capacity, and without no cooling, device other than the components strictly necessary for the generation of the air flow.
  • a battery for example a Lithium-ton or a Lithium-Polymer battery of high capacity
  • an air blowing device which is particularly remarkable in that it comprises, on the one hand, an exterior housing of a general, cylindrical shape, an interior, cylindrical housing of a smaller diameter and positioned axially in said exterior housing, said exterior and interior housings being connected by radial blades capable of rectifying the air flow of the propeller, currently called rectifiers, demarcating a number of cooling air circulation channels positioned between said housings and extending in parallel to the axis of the latter and, on the other hand, an axial fan the propeller of which is driven in rotation by an electric motor housed in the interior housing, this device being particularly remarkable in that the exterior housing, the interior housing and the rectifiers connecting said housings are made of a single piece of as good heat-conducting material, for example of aluminum another metal, of a composite material or a plastic material with good thermal conductivity qualities.
  • the exterior housing is provided with a plate that is in contact with said exterior housing and on which an electronic board is fastened for ensuring the management of the operation of a portable electric blower or analog equipment which includes such a device.
  • this holding plate of the electronic board is made of a single piece with the assembly constituted by the exterior housing, the interior housing and the rectifiers.
  • the blades of the axial propeller and the rectifying ribs are curbed in the opposite direction.
  • the rectifiers and the air circulation channels have a length corresponding essentially to the length of the interior housing which encloses the motor of the axial fan.
  • the solid bloc assembly constituted by the exterior housing, the interior housing, the rectifiers and the plate holding the electronic board, is made of magnesium.
  • the assembly constituted by the exterior housing, the interior housing, the rectifiers and the plate holding the electronic board is obtained, in a single piece, by a molding process or by a precision injection process.
  • the claimed air blowing device has further advantages such as sturdiness, so one can expect long-lasting operation, ease of performing operational tests during its assembly, maintenance or repair, a smaller number of constituent parts and a reduced space requirement.
  • the rectifiers connecting the exterior housing to the interior housing allow for rectifying the air flow while enabling a transfer of the heat stored b the interior housing enclosing the motor of the axial fan, and also ensuring circulation of cooling air around said interior housing so as to create optimal thermal equilibrium of the assembly due to the significant air speed generated by the propeller.
  • FIG. 1 showing a portable electric blower held by an operator and powered by a battery carried on the back of the latter, through an electric cord.
  • FIG. 2 is an exterior view and at a larger scale of the blower.
  • FIG. 3 is an exploded perspective view of the portable electric blower.
  • FIG. 4 is a detailed exploded view in perspective with partial sections of the air blowing device housed in the central part of the blower.
  • FIG. 5 is a detailed rear view, in perspective and at larger scale, illustrating the solid bloc assembly shown without the axial fan.
  • FIG. 6 is a front view and at a larger scale of the propeller of this axial fan.
  • FIG. 7 is a perspective view of an example of implementation of an air blower device according to the invention.
  • FIG. 8 is an axial section view of this device.
  • the blower shown comprises primarily an air guiding conduit 1 constituted by a succession of three tubular parts of generally cylindrical shape, namely a proximal part or suction nozzle 2 provided with an air inlet 3 , a distal air outlet part or exhaust pipe 4 and a central or intermediary part 5 is a separate piece positioned between said proximal and distal parts.
  • a functional assembly designated. globally by reference 6 , solid bloc or formed of an assembly of a number of elements and made of a material that is a good heat conductor, said assembly features the following functional sub-assemblies:
  • the functional central assembly 6 comprises a passageway 13 situated primarily in the air current and housing the electric cable(s) 14 connecting the electronic board 10 and the electric motor 7 , in order to ensure the protection of this or of these cables.
  • This passageway may be constituted by a specific sheath or may be made in one of the rectifiers 9 , or in a rib provided for this purpose.
  • said suction nozzle 2 presents, upstream of the functional assembly 6 , an elbow 22 the proximal end of which demarcates the air inlet 3 , is oriented downward, considering a working position of the blower according to which the blower is directed forward and the control handle 15 of the blower is placed on top of it.
  • control handle 15 of the blower is placed above the central part enclosing the functional assembly 6 , considering a working position of the blower according to which it is directed forward ( FIG. 1 ) and positioned essentially above the center of gravity G.
  • the handle 15 is constituted by the assembly of two half shells 30 and 31 , and it incorporates the control actuators of the tool, featuring in particular a secondary electronic board 32 , connected to the electronic management board of the tool and of the motor control 10 .
  • This secondary electronic board 32 is configured to analyze the position of the trigger 34 controlling the operation and stopping of the tool, in order to modulate the air speed at the outlet of the device proportionally to the position of said trigger; the objective being to obtain a progressive and precise dosage of the air flow.
  • the system for measuring the position of the trigger 34 uses a directed field magnet attached to said trigger (mobile part) associated with a magneto-resistive sensor placed on the secondary electronic board 32 (fixed part). Concerning the disclosure of such a system, one needs to refer to the description and drawings of the French patent published under number 2.935.175.
  • the secondary electronic board 32 features a speed selector and a display device of the speed selected, limiting the maximal speed of the air exiting from the device at the selected setting, the objective being to assist the operator in reducing the power consumption by adapting the best possible speed range available.
  • the different modes or speed ranges selected offset the high limit of frequency of the motor (for example, speed range 1 corresponds to a frequency between 0 and 15,400 rpm, speed range 4 corresponds to a frequency between 0 and 21,300 rpm).
  • the change of speed is made by impulse on the appropriate selection button.
  • a Hall-effect sensor that is also present on the secondary electronic board 32 (fixed part) functions here in “all or nothing” mode, which is to say in non-progressive mode.
  • the two half shells ( 30 and 31 ) constituting the handle 15 are, incidentally, capable, once they are assembled, of enabling a quick lastening of the totality of the tool elements to each other (proximal part 2 , central part 5 , and distal part 4 ) and also of ensuring the definitive specific form of the tool.
  • Closure of the shell is completed by a housing 35 adapted to the shape of the tool and covering the electronic board 10 in order to protect it and enabling also its inspection for maintenance, if necessary, without having to disassemble the entire tool.
  • the portable electric blower configured in the manner disclosed above may be equipped with a ring or other fastening element so it can be suspended from a harness H worn by the operator.
  • the electric motor 7 may be powered either by a battery B inserted into the blower, or through the intermediary of an electric cable 16 provided with a connecting means to a current source (power outlet of the power adapter or battery carried by the operator).
  • the functional assembly 6 housed in the central part 5 comprises an exterior housing 17 of a general cylindrical shape, an interior cylindrical housing 8 of a smaller diameter d and positioned axially in said exterior housing, said exterior housing 17 and interior housing 18 being linked by radial ribs commonly called rectifiers 9 .
  • rectifiers 9 demarcate a number of cooling air circulation channels 19 arranged between the exterior housing 17 and the interior housing 18 and around the latter. They extend longitudinally between said exterior housing 17 and interior housing 18 .
  • the exterior housing 17 presents open proximal and distal ends constituting respectively an air inlet 17 a and an air outlet 17 b.
  • the assembly constituted by the exterior housing 17 , the interior housing 18 and the rectifiers 9 is made of a single piece in a material that is a good heat conductor, for instance of magnesium or of aluminum, or even of composite or plastic matters possessing this property.
  • This solid bloc assembly can be obtained by a molding process or by a precision injection process known as such.
  • the functional assembly 6 housed in the central part 5 is in contact with the inner wall of the latter.
  • an axial fan 20 consisting of the propeller 8 and the motor 7 , the propeller 8 of it being, positioned in the proximal part of the exterior housing 17 and the electric motor 7 which provides rotation of said propeller is enclosed in the interior housing 18 which presents a length shorter than that of the exterior housing 17 .
  • the propeller 8 has a diameter D which is barely smaller than the internal diameter of the inlet 17 a of the exterior housing 17 in which the propeller is housed, so as to be able to rotate inside the latter without any friction.
  • the rectifiers 9 and the air circulation channels 19 demarcated by these rectifiers may have a length corresponding essentially to the length of the housing 18 enclosing the electric motor 7 of the axial fan 20 . They could however present a shorter length than that of the interior housing 18 , for example, they could have a length equal to the length of the blade chord 8 a of the propeller 8 .
  • the functional assembly 6 comprises an aerodynamic air inlet cone 11 positioned coaxially upstream of the propeller 8 , and/or an aerodynamic air outlet cone 12 positioned coaxially downstream of the electric motor 7 , in the extension of the interior housing 18 .
  • the length of the aerodynamic air outlet cone 12 is clearly greater than that of the aerodynamic air inlet cone 11 . For example, it presents a length greater than its diameter.
  • the blades 8 a of the axial propeller 8 and the rectifiers 9 are curved in the opposite direction which results in a good aeraulic output.
  • the interior housing 18 in which the electric motor 7 of the axial fan 20 is housed is positioned downstream of the propeller consisting of the assembly of blades 8 a, considering the direction of displacement of the air flow generated by said fan.
  • said propeller 8 presents a diameter D larger than the diameter d of the interior housing 18 .
  • the rectifiers 9 allow rectifying the air flow drawn upstream of the axial fan 20 and provide the transfer of a portion of the heat stored by the interior housing 18 enclosing the electric motor 7 , from the axial fan 20 toward the exterior housing.
  • the air flow produced by the axial fan 20 participates efficiently in the cooling of the walls of the exterior cylinder 17 , of the interior cylinder 18 and of the radial rectifying ribs of said air flow, with which walls the latter is in contact.
  • the air blowing device featuring the characteristics described above makes it possible to obtain an air flow at the outlet of the tool with significant speed and volume, by means of a motor capable of providing a rotating speed above 20 , 000 rpm.
  • the single bloc assembly 17 - 18 - 9 is machined to ensure ideal centering of the constitutive parts of the axial fan 20 so as to reduce the play of the propeller at the end of blades in order to increase aerodynamic performance and to reduce noise.
  • the exterior cylindrical housing 17 is equipped, on its outside, with a plate or base 21 on which is attached an electronic board 10 which is configured to provide management or guidance of the motor of the air blowing device of a portable electric blower or analog equipment, including the claimed air blowing device.
  • This electronic control of the motor ensures its optimum operation under all of its operating conditions (continuous or transient), via control elements (trigger, power limiter).
  • the electronic board enables changes of power settings, that is to say to modulate the air speed at the tool outlet, more or less frequently, in order to adapt them to the configuration of the treated surface, particularly when the areas to be treated are hard to reach (this is for example the case of surfaces underneath vehicles parked on urban streets), or to the conditions of the leaves (dry or wet) or other trash to be swept away.
  • the plate 21 holding the electronic board 10 is made of a single piece with the assembly constituted by the exterior housing 17 , the interior housing 18 and the rectifiers 9 .
  • the fastening of the electronic 10 on a support or plate 21 that is integral with the exterior housing 17 allows for good dissipation of the heat generated by said electronic board.
  • This provides several interesting advantages, in particular it contributes to proper balancing of the blower, facilitates easy assembly and maintenance, and the possibility to easily perform operational tests on said central part, prior to the complete and definitive assembly of the equipment.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Cleaning Of Streets, Tracks, Or Beaches (AREA)
US14/009,498 2011-04-07 2012-04-05 Standalone portable electric blower with variable air exit speed Abandoned US20140140861A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR11/01057 2011-04-07
FR1101057A FR2973815B1 (fr) 2011-04-07 2011-04-07 Souffleur electroportatif autonome a vitesse de sortie d'air modulable
PCT/FR2012/000129 WO2012136906A2 (fr) 2011-04-07 2012-04-05 Souffleur electroportatif autonome a vitesse de sortie d'air modulable

Publications (1)

Publication Number Publication Date
US20140140861A1 true US20140140861A1 (en) 2014-05-22

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Application Number Title Priority Date Filing Date
US14/009,498 Abandoned US20140140861A1 (en) 2011-04-07 2012-04-05 Standalone portable electric blower with variable air exit speed

Country Status (8)

Country Link
US (1) US20140140861A1 (fr)
EP (1) EP2694740B1 (fr)
JP (1) JP6118795B2 (fr)
CN (1) CN103534413B (fr)
DK (1) DK2694740T3 (fr)
ES (1) ES2544999T3 (fr)
FR (1) FR2973815B1 (fr)
WO (1) WO2012136906A2 (fr)

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CN105422507A (zh) * 2014-09-09 2016-03-23 苏州金莱克精密机械有限公司 吹风机
WO2016044268A1 (fr) * 2014-09-15 2016-03-24 Alare Technologies, Llc Souffleur de débris électrique portatif
CN105465007A (zh) * 2014-09-09 2016-04-06 苏州金莱克精密机械有限公司 吹风机
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WO2016201455A1 (fr) * 2015-06-12 2016-12-15 Ac (Macao Commercial Offshore) Limited Soufflante de ventilateur axial
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US9737182B2 (en) 2013-11-22 2017-08-22 Andreas Stihl Ag & Co. Kg Handheld work apparatus having a blower tube
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CN108677851A (zh) * 2018-08-06 2018-10-19 浙江中马园林机器股份有限公司 一种轴流式风道总成及轴流式吹风机
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US20190162192A1 (en) * 2014-11-28 2019-05-30 Positec Power Tools (Suzhou) Co., Ltd. Blower
US10458128B2 (en) 2015-10-08 2019-10-29 Owens Corning Intellecutal Capital, LLC Loosefill insulation blowing machine with a distribution airstream having a variable flow rate
US20200214229A1 (en) * 2017-09-30 2020-07-09 Nanjing Chervon Industry Co., Ltd. Blower
US10724530B2 (en) 2014-05-19 2020-07-28 Husqvarna Ab Blower with cruise control and boost function
US10781818B2 (en) * 2012-03-06 2020-09-22 Ziehl-Abegg Se Axial fan
US10876545B2 (en) * 2018-04-09 2020-12-29 Vornado Air, Llc System and apparatus for providing a directed air flow
US11067087B2 (en) 2015-03-12 2021-07-20 Black & Decker, Inc. Axial-fan blower
US20210246615A1 (en) * 2018-06-22 2021-08-12 Geismar Machine-tool system, particularly for work on a railway line
US20220341432A1 (en) * 2019-08-29 2022-10-27 Koki Holdings Co., Ltd. Blower
US11695312B2 (en) 2017-09-01 2023-07-04 Milwaukee Electric Tool Corporation Electrostatic discharge dissipation structure
US11771018B2 (en) 2019-06-14 2023-10-03 Makita Corporation Blower
US11889794B2 (en) 2020-12-30 2024-02-06 Milwaukee Electric Tool Corporation Handheld blower

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CN103534413A (zh) 2014-01-22
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ES2544999T3 (es) 2015-09-07
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