WO2003086164A2 - A low noise aspirator and/or ventilator device - Google Patents

A low noise aspirator and/or ventilator device Download PDF

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Publication number
WO2003086164A2
WO2003086164A2 PCT/IT2003/000166 IT0300166W WO03086164A2 WO 2003086164 A2 WO2003086164 A2 WO 2003086164A2 IT 0300166 W IT0300166 W IT 0300166W WO 03086164 A2 WO03086164 A2 WO 03086164A2
Authority
WO
WIPO (PCT)
Prior art keywords
aspirator
motor
ventilator device
operating means
transmission
Prior art date
Application number
PCT/IT2003/000166
Other languages
French (fr)
Other versions
WO2003086164A3 (en
Inventor
Marino Pedrazzini Bertolazzi
Original Assignee
Marino Pedrazzini Bertolazzi
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 Marino Pedrazzini Bertolazzi filed Critical Marino Pedrazzini Bertolazzi
Priority to AU2003226463A priority Critical patent/AU2003226463A1/en
Publication of WO2003086164A2 publication Critical patent/WO2003086164A2/en
Publication of WO2003086164A3 publication Critical patent/WO2003086164A3/en

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/0081—Means for exhaust-air diffusion; Means for sound or vibration damping
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L5/00—Structural features of suction cleaners
    • A47L5/12—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum
    • A47L5/22—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum with rotary 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
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • 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
    • A45D20/22—Helmets with hot air supply or ventilating means, e.g. electrically heated air current
    • A45D20/34—Arrangements of the ventilating means
    • 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
    • A45D20/22—Helmets with hot air supply or ventilating means, e.g. electrically heated air current
    • A45D20/42—Additional devices or measures, e.g. for noise damping, for musical entertainment

Definitions

  • the present invention concerns a low noise aspirator and/or ventilator device that may be used specially for domestic, industrial and sanitary vacuum cleaners, warm air driers and convectors in general, hair driers, high-pressure water cleaning machines, compressors, aspiration pumps and other.
  • a problem concerning this kind of electric household appliances and machines consists in the noise, which is particularly bothersome for the household appliances so as to limit their possibility of use.
  • Low speed electric motors having a low noise are known, such as inductive motors which usually have a speed of rotation of 1,400 or 2,800 rpm. These motors, however, are not used in the known aspirator and ventilator devices, because their low speed of rotation would not yield the desired aspirator or ventilator power. It is the aim of the present invention to realize a low noise aspirator and or ventilator device that may be applied to a plurality of household appliances or machines for industrial purpose, such as vacuum cleaners, warm air driers, high-pressure water cleaning machines, compressors and pumps, as well as to multifunctional machines like, for example, a water cleaning machine also comprising an air aspirator.
  • an aspirator and/or ventilator device comprising an electric motor, operating means and connecting means between said motor and said operating means, characterized in that said electric motor is a low-speed motor and said connecting means comprise a speed multiplier transmission.
  • Said low-speed motor is advantageously an inductive motor, having a speed of rotation of 1400 or 2800 rpm.
  • it may be also a collector motor, or a Hall-effect motor .
  • Said transmission advantageously comprises a couple of wheels or belt pulleys, connected with means adapted for transmitting the motion.
  • the advantage obtained by means of the present invention consists in that, due to the use of said low-speed motor and of said speed multiplier, the device result particularly noiseless, still having a suitable aspiration and or ventilation efficiency.
  • Figure 1 shows a schematic lateral and partially sectional view of an aspirator and/or ventilator device, realized according to the present invention.
  • Figure 2 shows a schematic sectional view of a low noise vacuum cleaner, comprising a device according to figure 1.
  • Figure 3 shows the essential scheme of a high-pressure water cleaning machine, also comprising an air aspirator, realized with a device according to the present invention.
  • the aspirator and/or ventilator device essentially comprises an electric motor 1, connected to operating means 2 by means of a speed multiplier transmission 3, having a velocity ratio higher than 1.
  • the electric motor 1 is a low-speed motor, usually with a speed of rotation of 1400 or 2800 ⁇ m, and, advantageously, it is an inductive motor.
  • the operating means 2 are adapted to treat air, water or fluids in general.
  • said means essentially comprise a centrifugal, axial-inlet air impeller 4, and a dif ⁇ user 5.
  • the transmission 3, is a belt transmission that comprises a first shaft 6 connected to the motor 1, a second shaft 7 on which the impeller 4 is keyed, a couple of belt pulleys 8a and 8b, respectively keyed on the shaft 6 and on the shaft 7, and a transmission belt 9 connecting said pulleys.
  • the belt 9 transmits the motion between said two pulleys 8a and 8b without slipping on them.
  • a multi-trapezoidal section belt may advantageously be used, like the known Poly-V® belt; however, other kinds of belts may also be used, such as circular section belts.
  • the velocity ratio is advantageously about 10:1, even if it shall be determined according to the motor used, to the features of the operating means and to the aspiration or ventilation power required.
  • the transmission 3 may be realized in other ways, according to the known art, for example by means of gears, mechanical contact pulleys or magnetic contact pulleys. Further known elements, like supports and bearings for shafts 6 and 7, are not shown.
  • the vacuum cleaner essentially comprises a cylindrical drum 10, housing the motor 1, the operating means 2, including the impeller 4 and the dif ⁇ user 5, and the transmission 3.
  • the drum 10 comprises, on its external surface, an aspiration pipe union 11 for the connection of means of use like a flexible or a rigid pipe, joints and other.
  • said pipe union 11 is placed on the lateral surface of the drum 10.
  • the pipe union 11 is connected to said impeller 4 by means of a closed duct 12, internal to said drum 10. At least one filter 13 is provided along said duct 12.
  • the discharge of said dif ⁇ user 5 is connected to a pipe 14, ending inside a layer of sound absorbing material 15, permeable to air, provided at the bottom of the drum 10.
  • the vacuum cleaner further comprises an air discharge outlet 16.
  • air heating means are connected to the vacuum cleaner, such as an electric resistance 17, placed in the air outlet 16.
  • Said heating means may further comprise a thermostat, regulation controls like a timer and other similar devices commonly used, for example, on stoves or warm air convectors.
  • said heating means may be placed differently, according to the needs, or they may be directly connected to the aspirator and/or ventilator device.
  • the electric resist.ance 17, for example, may be placed at the discharge of the dif ⁇ user 5 or it may be housed in a discharge pipe external to the device.
  • Figure 3 shows another possible application of the present invention, for obtaining a high-pressure water cleaning machine, that may be used also as a vacuum cleaner or air aspirator, thanks to the device according to the present invention.
  • Said machine essentially comprises an aspirator and/or ventilator device as described above, and a high pressure pump 20, mechanically connected to the opposite end of the shaft 6 of the electric motor 1.
  • Said pump 20 is usually a positive-displacement pump.
  • the electric motor 1 drive the impeller 4 by means of the transmission 3.
  • the impeller 4 sucks air from its central portion and leads it into the dif ⁇ user 5 with a centrifugal motion.
  • the noise produced by said device is particularly low.
  • the impeller 4 rotates at a high speed, such as to supply the required aspiration or ventilation power.
  • the vacuum cleaner shown in figure 2 works as follows.
  • the impeller 4 sucks an air flow from the pipe union 11 through the duct 12, and discharges it into said diffiiser 5. Dust and solid particles tr.ansported by said air flow are filtered by the filter 13, placed upstream of the impeller.
  • the air flow has a rather high speed, due to the quick rotation of the impeller 4.
  • the discharge of said diffiiser 5 is led tlirough the layer of sound absorbing material 15, where it slows down and distributes through a large passage section.
  • the working noise of the machine is further reduced, reducing rustle and other aerodynamic noises due to the turbulent flow in the drum 10.
  • the air flows from the sound absorbing layer 15 into the drum 10, and is released outside through the outlet 16.
  • the duct 12 also allows to keep the aspiration air flow separated from the discharge air flow, thus improving the general efficiency of the vacuum cleaner.
  • the air heating means among which the electric resistance 17, allow the use of said vacuum cleaner also as a warm air convector. Furthermore, the low noise obtained by means of the device according to the present invention allows a continuous working, without any particular inconvenience, also for domestic or night heating.
  • the motor used is also suitable for pumps, compressors or other machines working with fluids, and therefore the invention enables the realization of multifunctional machines, like the high-pressure water cleaning machine shown in figure 3, that may be used also as a vacuum cleaner or an air aspirator in general, with the advantage of a single machine suitable for different uses, in addition to the low working noise.
  • the machine may be provided with devices adapted to choose its use as a water cleaning machine or a vacuum cleaner, like electrical or mechanical selectors of known type.
  • a further possibility, not shown, is to use a device according to the present invention for realizing a professional hair drier, with a main body inside which the aspirator and ventilator device is housed, and a flexible pipe of suitable length. Said pipe advantageously ends with a handle, inside which the means for air heating and its regulation controls are inserted.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Electric Motors In General (AREA)
  • Motor Or Generator Cooling System (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)

Abstract

A low noise aspirator and/or ventilator device, comprising an electric motor (1), operating means (2) and means for the connection between said motor (1) and said operating means (2), in which said electric motor (1) is a low-speed motor and said connection means comprise a speed multiplier transmission (3), thus allowing to obtain a particularly noiseless machine.

Description

A LOW NOISE ASPIRATOR AND/OR VENTILATOR DEVICE
The present invention concerns a low noise aspirator and/or ventilator device that may be used specially for domestic, industrial and sanitary vacuum cleaners, warm air driers and convectors in general, hair driers, high-pressure water cleaning machines, compressors, aspiration pumps and other.
A problem concerning this kind of electric household appliances and machines consists in the noise, which is particularly bothersome for the household appliances so as to limit their possibility of use.
This problem is caused substantially by the use of electric brush motors, running at a very high speed - about 20,000 rpm - that allow to obtain a suitable aspiration, ventilation or compression power but are very noisy due to the brushes rubbing on the collector.
Low speed electric motors having a low noise are known, such as inductive motors which usually have a speed of rotation of 1,400 or 2,800 rpm. These motors, however, are not used in the known aspirator and ventilator devices, because their low speed of rotation would not yield the desired aspirator or ventilator power. It is the aim of the present invention to realize a low noise aspirator and or ventilator device that may be applied to a plurality of household appliances or machines for industrial purpose, such as vacuum cleaners, warm air driers, high-pressure water cleaning machines, compressors and pumps, as well as to multifunctional machines like, for example, a water cleaning machine also comprising an air aspirator.
The aim set forth is reached by means of the present invention, consisting of an aspirator and/or ventilator device, comprising an electric motor, operating means and connecting means between said motor and said operating means, characterized in that said electric motor is a low-speed motor and said connecting means comprise a speed multiplier transmission.
Said low-speed motor is advantageously an inductive motor, having a speed of rotation of 1400 or 2800 rpm. As an alternative, it may be also a collector motor, or a Hall-effect motor .
Said transmission advantageously comprises a couple of wheels or belt pulleys, connected with means adapted for transmitting the motion.
The advantage obtained by means of the present invention consists in that, due to the use of said low-speed motor and of said speed multiplier, the device result particularly noiseless, still having a suitable aspiration and or ventilation efficiency.
The present invention will be described more in detail hereinbelow, relating to the enclosed drawings showing some preferred embodiments.
Figure 1 shows a schematic lateral and partially sectional view of an aspirator and/or ventilator device, realized according to the present invention.
Figure 2 shows a schematic sectional view of a low noise vacuum cleaner, comprising a device according to figure 1.
Figure 3 shows the essential scheme of a high-pressure water cleaning machine, also comprising an air aspirator, realized with a device according to the present invention.
Relating to the details shown in the figures, the aspirator and/or ventilator device according to the present invention essentially comprises an electric motor 1, connected to operating means 2 by means of a speed multiplier transmission 3, having a velocity ratio higher than 1.
The electric motor 1 is a low-speed motor, usually with a speed of rotation of 1400 or 2800 φm, and, advantageously, it is an inductive motor. The operating means 2 are adapted to treat air, water or fluids in general. In the shown embodiment, said means essentially comprise a centrifugal, axial-inlet air impeller 4, and a difϊuser 5.
The transmission 3, according to the shown embodiment, is a belt transmission that comprises a first shaft 6 connected to the motor 1, a second shaft 7 on which the impeller 4 is keyed, a couple of belt pulleys 8a and 8b, respectively keyed on the shaft 6 and on the shaft 7, and a transmission belt 9 connecting said pulleys.
The belt 9 transmits the motion between said two pulleys 8a and 8b without slipping on them. For this puφose, a multi-trapezoidal section belt may advantageously be used, like the known Poly-V® belt; however, other kinds of belts may also be used, such as circular section belts.
If the device is used as an air aspirator and the electric motor 1 is of inductive type, the velocity ratio is advantageously about 10:1, even if it shall be determined according to the motor used, to the features of the operating means and to the aspiration or ventilation power required.
The transmission 3 may be realized in other ways, according to the known art, for example by means of gears, mechanical contact pulleys or magnetic contact pulleys. Further known elements, like supports and bearings for shafts 6 and 7, are not shown.
A practical application of the present invention for obtaining a low noise vacuum cleaner is shown in figure 2.
The vacuum cleaner essentially comprises a cylindrical drum 10, housing the motor 1, the operating means 2, including the impeller 4 and the difϊuser 5, and the transmission 3.
The drum 10 comprises, on its external surface, an aspiration pipe union 11 for the connection of means of use like a flexible or a rigid pipe, joints and other. Advantageously, said pipe union 11 is placed on the lateral surface of the drum 10.
The pipe union 11 is connected to said impeller 4 by means of a closed duct 12, internal to said drum 10. At least one filter 13 is provided along said duct 12.
The discharge of said difϊuser 5 is connected to a pipe 14, ending inside a layer of sound absorbing material 15, permeable to air, provided at the bottom of the drum 10.
The vacuum cleaner further comprises an air discharge outlet 16. Advantageously, air heating means are connected to the vacuum cleaner, such as an electric resistance 17, placed in the air outlet 16. Said heating means may further comprise a thermostat, regulation controls like a timer and other similar devices commonly used, for example, on stoves or warm air convectors.
In different embodiments, said heating means may be placed differently, according to the needs, or they may be directly connected to the aspirator and/or ventilator device. The electric resist.ance 17, for example, may be placed at the discharge of the difϊuser 5 or it may be housed in a discharge pipe external to the device.
Figure 3 shows another possible application of the present invention, for obtaining a high-pressure water cleaning machine, that may be used also as a vacuum cleaner or air aspirator, thanks to the device according to the present invention.
Said machine essentially comprises an aspirator and/or ventilator device as described above, and a high pressure pump 20, mechanically connected to the opposite end of the shaft 6 of the electric motor 1. Said pump 20 is usually a positive-displacement pump.
The working of the device according to the present invention is the following. Relating to the details shown in figure 1, the electric motor 1 drive the impeller 4 by means of the transmission 3. The impeller 4 sucks air from its central portion and leads it into the difϊuser 5 with a centrifugal motion.
As the motor 1 is an inductive low-speed motor, the noise produced by said device is particularly low.
However, due to the velocity ratio of about 10:1 between the pulleys 8a and 8b, the impeller 4 rotates at a high speed, such as to supply the required aspiration or ventilation power.
The vacuum cleaner shown in figure 2 works as follows. The impeller 4 sucks an air flow from the pipe union 11 through the duct 12, and discharges it into said diffiiser 5. Dust and solid particles tr.ansported by said air flow are filtered by the filter 13, placed upstream of the impeller.
At the discharge of the difϊuser 5, the air flow has a rather high speed, due to the quick rotation of the impeller 4. By means of a pipe 14, the discharge of said diffiiser 5 is led tlirough the layer of sound absorbing material 15, where it slows down and distributes through a large passage section. Thus, the working noise of the machine is further reduced, reducing rustle and other aerodynamic noises due to the turbulent flow in the drum 10. Finally, the air flows from the sound absorbing layer 15 into the drum 10, and is released outside through the outlet 16.
The duct 12 also allows to keep the aspiration air flow separated from the discharge air flow, thus improving the general efficiency of the vacuum cleaner.
The air heating means, among which the electric resistance 17, allow the use of said vacuum cleaner also as a warm air convector. Furthermore, the low noise obtained by means of the device according to the present invention allows a continuous working, without any particular inconvenience, also for domestic or night heating.
The motor used is also suitable for pumps, compressors or other machines working with fluids, and therefore the invention enables the realization of multifunctional machines, like the high-pressure water cleaning machine shown in figure 3, that may be used also as a vacuum cleaner or an air aspirator in general, with the advantage of a single machine suitable for different uses, in addition to the low working noise.
It is obvious that the machine may be provided with devices adapted to choose its use as a water cleaning machine or a vacuum cleaner, like electrical or mechanical selectors of known type. A further possibility, not shown, is to use a device according to the present invention for realizing a professional hair drier, with a main body inside which the aspirator and ventilator device is housed, and a flexible pipe of suitable length. Said pipe advantageously ends with a handle, inside which the means for air heating and its regulation controls are inserted.
Finally, it is clear that the aforesaid examples of application o the invention are not limitative, as the same advantages will be obtained in a number of other domestic or professional machines.

Claims

1. An aspirator and or ventilator device, comprising an electric motor (1), operating means (2) and connecting means between said motor (1) and said operating means (2), characterized in that said electric motor (1) is a low-speed motor and said connection means comprise a speed multiplier transmission (3).
2. An aspirator and or ventilator device according to claim 1, characterized in that said electric motor (1) is an inductive motor.
3. An aspirator and or ventilator device according to claim 1, characterized in that said transmission (3) comprises two pulleys (8a, 8b) connected by a belt (9).
4. An aspirator and/or ventilator device according to claim 1, characterized in that said transmission (3) has a velocity ratio of about 10:1.
5. An aspirator and or ventilator device according to claim 1, characterized in that it comprises heating means for heating the fluid treated by said operating means (2).
6. An aspirator and/or ventilator device according to claim 6, characterized in that said heating means comprise an electric resistance (17).
7. A vacuum cleaner for domestic or industrial puφose, characterized in that it comprises an aspirator and/or ventilator device according to at least one of the preceding claims.
8. A vacuum cleaner according to claim 7, characterized in that it comprises: a substantially cylindrical drum (10), housing said motor (1), said operating means (2) and said transmission (3); - an aspiration pipe union (11) arranged on the surface of said drum (10), connected to said operating means (2) by means of an aspiration duct (12); a layer of sound absorbing material (15), permeable to air, provided inside said drum (10), tlirough which the discharge of said operating means (2) is led.
9. A water cleaning machine comprising a high pressure pump (20) for liquids, characterized in that it further comprises an aspirator and/or ventilator device according to at least one of the preceding claims, and the motor (1) of which operates said liquid pump (20).
PCT/IT2003/000166 2002-04-17 2003-03-20 A low noise aspirator and/or ventilator device WO2003086164A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003226463A AU2003226463A1 (en) 2002-04-17 2003-03-20 A low noise aspirator and/or ventilator device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITCR2002A000005 2002-04-17
ITCR20020005 ITCR20020005A1 (en) 2002-04-17 2002-04-17 LOW NOISE SUCTION AND / OR FAN DEVICE

Publications (2)

Publication Number Publication Date
WO2003086164A2 true WO2003086164A2 (en) 2003-10-23
WO2003086164A3 WO2003086164A3 (en) 2003-12-31

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PCT/IT2003/000166 WO2003086164A2 (en) 2002-04-17 2003-03-20 A low noise aspirator and/or ventilator device

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AU (1) AU2003226463A1 (en)
IT (1) ITCR20020005A1 (en)
WO (1) WO2003086164A2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1762166A2 (en) * 2005-09-09 2007-03-14 Samsung Gwangju Electronics Co., Ltd. Vacuum cleaner having a suction motor and means to decelerate rotation of the fan drive shaft

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2327810A (en) * 1939-12-28 1943-08-24 Electric Vacuum Cleaner Co Vacuum cleaner
FR2014227A1 (en) * 1968-06-26 1970-04-17 Otm Elettrodomestici
FR2280350A1 (en) * 1974-08-01 1976-02-27 Semco Sa Sweeping machine with vacuum removal of debris - has direct coaxial air entry to suction fan unit
US4651380A (en) * 1985-03-01 1987-03-24 Rug Doctor, Inc. Portable vacuum cleaning machine
FR2633507A1 (en) * 1983-04-01 1990-01-05 Seigrem Sa Flameproof suction device for picking up debris and waste in grain storage silos
DE3932802A1 (en) * 1989-09-30 1991-04-11 Wap Reinigungssysteme Brushless high speed DC vacuum cleaner motor - has electronic commutation for hazardous applications using Hall-effect sensors in permanent magnet rotor with in-built stator current limit
US5504971A (en) * 1992-06-04 1996-04-09 Matsushita Appliance Corporation Vacuum cleaner with adjustable speed power assist
US5664282A (en) * 1993-01-08 1997-09-09 Aktiebolaget Electrolux Vacuum cleaner
US6305048B1 (en) * 1999-03-03 2001-10-23 Harold Salisian Electric backpack blower and accessory operator

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2327810A (en) * 1939-12-28 1943-08-24 Electric Vacuum Cleaner Co Vacuum cleaner
FR2014227A1 (en) * 1968-06-26 1970-04-17 Otm Elettrodomestici
FR2280350A1 (en) * 1974-08-01 1976-02-27 Semco Sa Sweeping machine with vacuum removal of debris - has direct coaxial air entry to suction fan unit
FR2633507A1 (en) * 1983-04-01 1990-01-05 Seigrem Sa Flameproof suction device for picking up debris and waste in grain storage silos
US4651380A (en) * 1985-03-01 1987-03-24 Rug Doctor, Inc. Portable vacuum cleaning machine
DE3932802A1 (en) * 1989-09-30 1991-04-11 Wap Reinigungssysteme Brushless high speed DC vacuum cleaner motor - has electronic commutation for hazardous applications using Hall-effect sensors in permanent magnet rotor with in-built stator current limit
US5504971A (en) * 1992-06-04 1996-04-09 Matsushita Appliance Corporation Vacuum cleaner with adjustable speed power assist
US5664282A (en) * 1993-01-08 1997-09-09 Aktiebolaget Electrolux Vacuum cleaner
US6305048B1 (en) * 1999-03-03 2001-10-23 Harold Salisian Electric backpack blower and accessory operator

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1762166A2 (en) * 2005-09-09 2007-03-14 Samsung Gwangju Electronics Co., Ltd. Vacuum cleaner having a suction motor and means to decelerate rotation of the fan drive shaft
AU2006201003B2 (en) * 2005-09-09 2007-11-15 Samsung Gwangju Electronics Co., Ltd. Vacuum cleaner having brush motor using deceleration rate
EP1762166A3 (en) * 2005-09-09 2008-01-02 Samsung Gwangju Electronics Co., Ltd. Vacuum cleaner having a suction motor and means to decelerate rotation of the fan drive shaft

Also Published As

Publication number Publication date
AU2003226463A1 (en) 2003-10-27
WO2003086164A3 (en) 2003-12-31
ITCR20020005A1 (en) 2003-10-17

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