CA2574750C - Vacuum cleaner filter cleaning mechanisms - Google Patents
Vacuum cleaner filter cleaning mechanisms Download PDFInfo
- Publication number
- CA2574750C CA2574750C CA2574750A CA2574750A CA2574750C CA 2574750 C CA2574750 C CA 2574750C CA 2574750 A CA2574750 A CA 2574750A CA 2574750 A CA2574750 A CA 2574750A CA 2574750 C CA2574750 C CA 2574750C
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- Canada
- Prior art keywords
- filter
- vacuum cleaner
- motor
- cleaning mechanism
- filter cleaning
- Prior art date
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Classifications
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- 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
- A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
- A47L9/12—Dry filters
- A47L9/127—Dry filters tube- or sleeve-shaped
-
- 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
- A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
- A47L9/16—Arrangement or disposition of cyclones or other devices with centrifugal action
- A47L9/1658—Construction of outlets
- A47L9/1666—Construction of outlets with filtering means
-
- 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
- A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
- A47L9/16—Arrangement or disposition of cyclones or other devices with centrifugal action
- A47L9/1683—Dust collecting chambers; Dust collecting receptacles
-
- 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
- A47L9/20—Means for cleaning filters
-
- 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
- A47L9/28—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means
- A47L9/2836—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means characterised by the parts which are controlled
-
- 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
- A47L9/28—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means
- A47L9/2857—User input or output elements for control, e.g. buttons, switches or displays
-
- 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
- A47L9/28—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means
- A47L9/2868—Arrangements for power supply of vacuum cleaners or the accessories thereof
- A47L9/2878—Dual-powered vacuum cleaners, i.e. devices which can be operated with mains power supply or by batteries
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/42—Auxiliary equipment or operation thereof
- B01D46/44—Auxiliary equipment or operation thereof controlling filtration
- B01D46/46—Auxiliary equipment or operation thereof controlling filtration automatic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2273/00—Operation of filters specially adapted for separating dispersed particles from gases or vapours
- B01D2273/28—Making use of vacuum or underpressure
Abstract
A vacuum cleaner comprises an inlet for dirty air, an outlet for clean air, a filter located in fluid communication between the inlet and the outlet, a first motor, a fan driven by the first motor for moving air from the inlet through the filter to the outlet, an electrical power supply for supplying power to the first motor, an electrically powered filter cleaning mechanism for removing dirt from the filter, a user-operated switch for activating the filter cleaning mechanism, whereby operation of the switch results in operation of the filter cleaning mechanism, and a timing device, wherein operation of the switch activates the filter cleaning mechanism and the timing device, and the timing device subsequently deactivates the filter cleaning mechanism.
Description
VACUUM CLEANER FILTER CLEANING MECHANISMS
The present invention relates to vacuum cleaners, and in particular to mechanisms for cleaning the filters of vacuum cleaners and vacuum cleaners comprising such mechanisms. Vacuum cleaners generally come in two main varieties, namely bagged and bagless vacuum cleaners, according to the technique they use to separate out dust and dirt from air which is drawn into the vacuum cleaner during operation. As the name implies, bagged vacuum cleaners comprise a porous bag. This is positioned with its mouth across an airflow pathway between a dirty air inlet of the vacuum cleaner and a clean air outlet therefrom, in order to capture dust and dirt entrained with the air as the air passes through the bag.
Bagless vacuum cleaners on the other hand do not include a bag to intercept dust and dirt in this way, but instead use a technique for separating out dust and dirt from the incoming air which relies on inertial separation of the dust and dirt from the air, typically by applying a centrifugal force to the dust and dirt, such as in a cyclone.
However, both the bagged and bagless varieties of vacuum cleaner very usually also include a filter, which operates in addition to these two main separation techniques, in order to increase the level of dust and dirt separation provided by the main separation technique alone. One or more such filters may be placed upstream or downstream of the main separation process, or in both upstream and downstream locations. The present invention is therefore equally applicable to both bagged and bagless varieties of vacuum cleaner. It is also equally applicable to larger floor-running vacuum cleaners of the cylinder and upright types, and to smaller hand-holdable vacuum cleaners, such as the present applicant's range of Dustbuster hand-holdable vacuum cleaners.
Regardless of the type of vacuum cleaner involved, however, any vacuum cleaner which includes a filter presents the problem that the filter will become progressively blocked with dust and dirt as the vacuum cleaner is used. This has the disadvantage of lowering the rate of air movement (i.e. volume of air moved per unit time) through the vacuum cleaner by obstructing the airflow during operation of the vacuum cleaner, thereby also reducing the overall cleaning efficiency of the vacuum cleaner. Accordingly, in order to ensure the continuing efficient operation of the vacuum cleaner, it is necessary for a user to clean the filter from time to time. In its most basic form, this means that the user manually removes the filter from the vacuum cleaner, washes or otherwise cleans it, and then replaces it back in the vacuum cleaner. However, this has the disadvantage that it requires the user to handle the dirty filter in order to clean it. A filter cleaning mechanism which avoids this problem is therefore preferred to such manual cleaning.
Accordingly, several vacuum cleaner filter cleaning techniques which avoid the need for a user to handle a dirty filter are already known in the prior art. A
first example is provided by the Electrolux range of bagless cylinder vacuum cleaners with model numbers Z8220, Z8230 and Z8240, each of which permits a filter cleaning technique working as follows. As shown schematically in Fig. 1A, these vacuum cleaners comprise a motor 10 and a fan 12 driven by the motor 10 to move air through the vacuum cleaner from a dirty air inlet 26 via a main dirt separation device 14 (which in this case is a cyclone chamber) to a clean air outlet 24.
However, these vacuum cleaners also comprise a pair of identical, mutually interchangeable filters 16, 18, which are mounted on a single, symmetrical assembly 20 within the body of the vacuum cleaner. When this assembly 20 is in place, a first one 16 of the two filters is positioned across the flow of air through the vacuum cleaner between the main dirt separation device 14 and the clean air outlet 24. The second 18 of the two filters is also in fluid communication with the main dirt separation device 14, but not directly with the clean air outlet 24, so that air exiting the main dirt separation device 14 passes through the first filter 16 to the clean air outlet 24 in preference to passing through the second filter 18, as represented in Fig. 1A by the arrows.
However, when the first filter 16 becomes blocked due to an excessive accumulation of dust and dirt thereon, a sensor also included in the vacuum cleaner detects a drop in the rate of air movement through the vacuum cleaner from the dirty air inlet 26 to the clean air outlet 24. This in turn illuminates a light mounted on the exterior of the vacuum cleaner body, which alerts the user to the fact that the first filter 16 needs cleaning. Without needing to touch the dirt-bearing parts of the dirty filter 16, the user can then swap the dirty filter 16 with the second, clean filter 18 by opening the body 22 of the vacuum cleaner, removing the symmetrical filter assembly 20, turning it through 180 degrees, and reinserting it into the vacuum cleaner with the second filter 18 now in the previous location of the first, dirty filter 16 and vice versa, as shown schematically in Fig. 1B. Thus the second filter 18, which at this stage is clean, will be introduced into the airflow pathway of dirty air through the vacuum cleaner to the clean air outlet 24 during normal operation thereof. Opening the body 22 of the vacuum cleaner to carry out this operation also has the effect of closing off the usual inlet 26 for dirty air to the main dirt separation device 14. Next, the user rotates the dirty first filter 16 by 360 degrees about its own axis. This activates a microswitch which operates the motor 10 to drive the air-moving fan 12.
However, since at this stage, the body 22 of the vacuum cleaner remains open and the usual inlet 26 for dirty air to the vacuum cleaner's main dirt separation chamber 14 remains closed, air is drawn from the atmosphere backwards through the dirty filter 16 by the fan 12 into the main dirt separation chamber 14, as represented by the arrows shown in Fig. 1 B, where the dirt from the dirty filter 16 is deposited. Once the dirty filter 16 has been rotated by a full 360 degrees, the microswitch is deactivated and the motor 10 shuts down. The filter cleaning operation being complete, the user may then close the body 22 of the vacuum cleaner once more, thereby re-opening the usual inlet 26 for dirty air to the vacuum cleaner's main dirt separation chamber 14, and the vacuum cleaner is once again ready for use.
Although this filter cleaning technique avoids the need for a user to handle the dirty filter in order to clean it, it has the disadvantage that the user must nonetheless open the vacuum cleaner and carry out a relatively complex sequence of operations, including removal and reinsertion of the filter assembly 20 into the body of the vacuum cleaner. The use of a pair of identical, interchangeable filters in this way instead of a single filter also increases the cost and complexity of manufacture.
Moreover, the user can ignore the light mounted on the exterior of the vacuum cleaner which alerts the user to the fact that a filter cleaning operation should be carried out, which would result in insufficient filter cleaning, or carry out a filter cleaning operation when not required. Thus the frequency of filter cleaning is left entirely within the control of the user.
A second example of a known filter cleaning technique is disclosed in EP 1 523 916 A, also in the name of Black & Decker Inc. This document describes a hand-holdable vacuum cleaner having a dirt cup housing a two-stage filter, comprising a first, course filter for filtering courser dirt and contained within the course filter, a second, fine filter for filtering finer dust. The second, fine filter is provided with a plurality of tabs arranged in a ring, which interengage with a corresponding plurality of drive tabs mounted in a ring on a filter cleaning wheel. The filter cleaning wheel comprises a gripping portion which is partially exposed through an exterior housing of the vacuum cleaner. Thus when a user takes hold of the gripping portion and uses it to rotate the filter cleaning wheel, the drive tabs mounted thereon engage with the corresponding tabs of the fine filter and cause it to rotate within the course filter. The fine filter is pleated and the course filter is provided with a plurality of ribs formed on the inner surface thereof. Thus as the fine filter rotates within the course filter, the ribs formed on the inner surface of the course filter successively contact the pleats of the fine filter. This agitates the fine filter, causing any accumulated dust adhering to the fine filter to be shaken off, through the holes of the course filter and into the dirt cup, which may then be emptied. This filter cleaning technique has the advantage that unlike the Electrolux filter cleaning technique described above, the user does not need to carry out a whole sequence of operations in order to clean the fine filter or remove the filter from the vacuum cleaner in order to do so. However, since the filter cleaning wheel is manually operated, when to clean the filter is again left entirely at the user's discretion. There is therefore a risk that the user will either neglect to clean the fine filter so that dust continues to accumulate thereon, thereby diminishing the vacuum cleaner's efficiency, or will rotate the filter cleaning wheel more often than is necessary in order to clean the filter, thereby diminishing the lifetime of the fine filter by increasing the amount of wear on the pleats of the fine filter caused by the ribs formed on the inner surface of the course filter.
Finally, a third example of a known filter cleaning technique is described in EP
1 231 856 A in the name of TechTronic Industries Co., Ltd. This document discloses a vacuum cleaner having a dirt collection chamber which houses a filter element provided with a top plate having a protrusion formed thereon. A leaf spring positioned above the protrusion is maintained in a bent condition away from the protrusion by being compressed between two shoulders of a rectangular recess formed in the top wall of the dirt collection chamber. The underside of the leaf spring faces but does not contact the protrusion on the top plate of the filter element, which is exposed to the leaf spring through a central opening formed in the rectangular recess of the top wall. The upper surface of the leaf spring instead contacts an actuation member in the form of a hinged lever having an upwardly directed finger-piece and a downwardly directed nose. Thus when a user presses on the finger-piece, the nose of the actuation member pushes the leaf spring through an over-centre condition and the central region of the leaf spring moves sharply downwards into a convex configuration in which it impacts on the protrusion carried by the top 5 plate of the filter element. This results in the filter element being shaken briefly to dislodge accumulated dust adhering to the filter element therefrom, and the dislodged dust falls into the dirt collection chamber, which can then be emptied. This filter cleaning technique also has the advantage that it does a user does not need to open the vacuum cleaner in order to clean the filter element, and that the user need only press a button to carry out the filter cleaning operation. However, since the leaf spring only comes into contact with the top plate of the filter element once when the finger-piece of the actuation member is depressed, the filter element is also only shaken once, and there remains a risk that much dust will remain adhered to the filter. Moreover, once again, since when to clean the filter element is left entirely at the user's discretion, there also remains a risk that the user will forget to clean the filter element as often as is required, so that dust continues to accumulate thereon, thereby diminishing the vacuum cleaner's efficiency.
As may be seen, therefore, all of the prior art filter cleaning techniques described above have at least the disadvantage that they all leave the timing of when to perform a filter cleaning operation entirely within the control of the user of the vacuum cleaner. This presents the risk that the user will either forget to clean the filter often enough, resulting in reduced efficiency of the vacuum cleaner, or will clean the filter more often than is required, resulting in increased wear on the filter elements. Accordingly, it is an object of the present invention to provide a vacuum cleaner filter cleaning technique which avoids this problem in order to result in effective cleaning of the filter at regular intervals over the operational lifetime of the filter, but which also avoids the need for a user to handle a dirty filter in order to clean it and which obviates the need for a user to open the vacuum cleaner in order to clean the filter or to carry out a complex sequence of operations in order to do so.
In one aspect, the present invention aims to achieve this object by providing a vacuum cleaner comprising an inlet for dirty air; an outlet for clean air; a filter located in fluid communication between the inlet and the outlet; a motor; a fan driven by the motor for moving air from the inlet through the filter to the outlet; an electrical power supply for supplying power to the motor; an on/off switch for placing the motor in powered electrical connection with the fan and having a first state wherein the motor drives the fan and a second state wherein the motor does not drive the fan;
and a filter cleaning mechanism for removing dirt from the filter; wherein activation of the filter cleaning mechanism is operatively associated with the on/off switch, whereby operation of the on/off switch results in operation of the filter cleaning mechanism.
Thus the filter is only cleaned when the vacuum cleaner's on/off switch is operated. This means that the frequency of filter cleaning is related directly to the amount of usage of the vacuum cleaner, so that the filter is cleaned neither too often nor too infrequently, but just often enough.
The vacuum cleaner may further comprise a timing device, wherein operation of the on/off switch from the first state to the second state activates the filter cleaning mechanism and the timing device, and the timing device subsequently deactivates the filter cleaning mechanism. Thus each time the vacuum cleaner is switched off after having been used, the filter cleaning mechanism is activated for a short time until deactivated again by the timing device, thereby cleaning the filter ready for use next time.
Alternatively, the vacuum cleaner may further comprise a timing device, wherein operation of the on/off switch from the second state to the first state activates the filter cleaning mechanism and the timing device, whereupon the timing device delays the motor from driving the fan, and the timing device subsequently deactivates the filter cleaning mechanism and ends the delay of the motor driving the fan. Thus each time the vacuum cleaner is switched on for use, the filter cleaning mechanism is activated for a short time until deactivated again by the timing device before the motor starts to drive the fan, thereby cleaning the filter before it is used.
In a third possible embodiment, the on/off switch has a third state wherein the motor does not drive the fan, operation of the on/off switch from the first state to the second state activates the filter cleaning mechanism and operation of the on/off switch from the second state to the third state deactivates the filter cleaning mechanism. Thus each time the vacuum cleaner is switched off after having been used, the filter cleaning mechanism is activated for a short time until deactivated again by the user operating the switch into its third state, thereby cleaning the filter ready for use next time.
Finally, in a fourth possible alternative embodiment of the first aspect of the invention, the on/off switch has a third state wherein said motor does not drive said fan, operation of said on/off switch from the second state to the third state activates said filter cleaning mechanism and operation of said on/off switch from the third state to the first state deactivates said filter cleaning mechanism. Thus each time the vacuum cleaner is switched on for use, the filter cleaning mechanism is activated for a short time until deactivated again by the user operating the switch into its first state wherein the motor starts to drive the fan, thereby cleaning the filter before it is used.
In a second aspect, the present invention also provides a vacuum cleaner comprising an inlet for dirty air, an outlet for clean air, a filter located in fluid communication between the inlet and the outlet, a first motor, a fan driven by the first motor for moving air from the inlet through the filter to the outlet, an electrical power supply for supplying power to the first motor, an electrically powered filter cleaning mechanism for removing dirt from the filter, a user-operated switch for activating the filter cleaning mechanism, whereby operation of the switch results in operation of the filter cleaning mechanism, and a timing device, wherein operation of the switch activates the filter cleaning mechanism and the timing device, and the timing device subsequently deactivates the filter cleaning mechanism.
Thus a user of the vacuum cleaner may clean the filter merely by operating the switch without the need to carry out a complex sequence of operations, or remove the filter from the vacuum cleaner in order to do so. Also, in order to operate the filter cleaning mechanism, the user need only operate the switch once, which will activate the filter cleaning mechanism for a short time until it is deactivated again by the timing device.
In one possible embodiment of the second aspect of the invention, the switch has a first state in which the filter cleaning mechanism is activated and a second state in which the filter cleaning mechanism is de-activated, and the switch latches in the first and second states thereof unless operated. Thus a user may switch the filter cleaning mechanism on and off by operating the switch each time.
In a second possible alternative embodiment of the second aspect of the invention, the switch has a first state in which the filter cleaning mechanism is activated and a second state in which the filter cleaning mechanism is de-activated, and the switch is monostable in the second state thereof, but must be held by a user in the first state thereof. Thus in order to operate the filter cleaning mechanism, the user must hold the switch in the second state and the filter cleaning mechanism will only continue to operate for as long as the switch is held in this fashion.
Further features and advantages of the present invention will become apparent from the following detailed description, which is given by way of example and in association with the accompanying drawings, in which:
Fig. 1A schematically shows a prior art filter cleaning mechanism in a first mode of operation thereof;
Fig. 1B schematically shows the prior art filter cleaning mechanism of Fig. 1A
in a second mode of operation thereof;
Fig. 2 is a perspective view of a vacuum cleaner with a removable dust collection chamber having a filter cleaning mechanism according to a first embodiment of the present invention;
Fig. 3 is a cross-sectional view through the removable dust collection chamber of the vacuum cleaner shown in Fig. 2;
Fig 4 is a partially cut-away perspective view of the dust collection chamber shown in Fig. 3, illustrating certain aspects of the filter cleaning mechanism;
Fig. 5 is a perspective view of the dust collection chamber shown in Fig. 3, illustrating other aspects of the filter cleaning mechanism;
The present invention relates to vacuum cleaners, and in particular to mechanisms for cleaning the filters of vacuum cleaners and vacuum cleaners comprising such mechanisms. Vacuum cleaners generally come in two main varieties, namely bagged and bagless vacuum cleaners, according to the technique they use to separate out dust and dirt from air which is drawn into the vacuum cleaner during operation. As the name implies, bagged vacuum cleaners comprise a porous bag. This is positioned with its mouth across an airflow pathway between a dirty air inlet of the vacuum cleaner and a clean air outlet therefrom, in order to capture dust and dirt entrained with the air as the air passes through the bag.
Bagless vacuum cleaners on the other hand do not include a bag to intercept dust and dirt in this way, but instead use a technique for separating out dust and dirt from the incoming air which relies on inertial separation of the dust and dirt from the air, typically by applying a centrifugal force to the dust and dirt, such as in a cyclone.
However, both the bagged and bagless varieties of vacuum cleaner very usually also include a filter, which operates in addition to these two main separation techniques, in order to increase the level of dust and dirt separation provided by the main separation technique alone. One or more such filters may be placed upstream or downstream of the main separation process, or in both upstream and downstream locations. The present invention is therefore equally applicable to both bagged and bagless varieties of vacuum cleaner. It is also equally applicable to larger floor-running vacuum cleaners of the cylinder and upright types, and to smaller hand-holdable vacuum cleaners, such as the present applicant's range of Dustbuster hand-holdable vacuum cleaners.
Regardless of the type of vacuum cleaner involved, however, any vacuum cleaner which includes a filter presents the problem that the filter will become progressively blocked with dust and dirt as the vacuum cleaner is used. This has the disadvantage of lowering the rate of air movement (i.e. volume of air moved per unit time) through the vacuum cleaner by obstructing the airflow during operation of the vacuum cleaner, thereby also reducing the overall cleaning efficiency of the vacuum cleaner. Accordingly, in order to ensure the continuing efficient operation of the vacuum cleaner, it is necessary for a user to clean the filter from time to time. In its most basic form, this means that the user manually removes the filter from the vacuum cleaner, washes or otherwise cleans it, and then replaces it back in the vacuum cleaner. However, this has the disadvantage that it requires the user to handle the dirty filter in order to clean it. A filter cleaning mechanism which avoids this problem is therefore preferred to such manual cleaning.
Accordingly, several vacuum cleaner filter cleaning techniques which avoid the need for a user to handle a dirty filter are already known in the prior art. A
first example is provided by the Electrolux range of bagless cylinder vacuum cleaners with model numbers Z8220, Z8230 and Z8240, each of which permits a filter cleaning technique working as follows. As shown schematically in Fig. 1A, these vacuum cleaners comprise a motor 10 and a fan 12 driven by the motor 10 to move air through the vacuum cleaner from a dirty air inlet 26 via a main dirt separation device 14 (which in this case is a cyclone chamber) to a clean air outlet 24.
However, these vacuum cleaners also comprise a pair of identical, mutually interchangeable filters 16, 18, which are mounted on a single, symmetrical assembly 20 within the body of the vacuum cleaner. When this assembly 20 is in place, a first one 16 of the two filters is positioned across the flow of air through the vacuum cleaner between the main dirt separation device 14 and the clean air outlet 24. The second 18 of the two filters is also in fluid communication with the main dirt separation device 14, but not directly with the clean air outlet 24, so that air exiting the main dirt separation device 14 passes through the first filter 16 to the clean air outlet 24 in preference to passing through the second filter 18, as represented in Fig. 1A by the arrows.
However, when the first filter 16 becomes blocked due to an excessive accumulation of dust and dirt thereon, a sensor also included in the vacuum cleaner detects a drop in the rate of air movement through the vacuum cleaner from the dirty air inlet 26 to the clean air outlet 24. This in turn illuminates a light mounted on the exterior of the vacuum cleaner body, which alerts the user to the fact that the first filter 16 needs cleaning. Without needing to touch the dirt-bearing parts of the dirty filter 16, the user can then swap the dirty filter 16 with the second, clean filter 18 by opening the body 22 of the vacuum cleaner, removing the symmetrical filter assembly 20, turning it through 180 degrees, and reinserting it into the vacuum cleaner with the second filter 18 now in the previous location of the first, dirty filter 16 and vice versa, as shown schematically in Fig. 1B. Thus the second filter 18, which at this stage is clean, will be introduced into the airflow pathway of dirty air through the vacuum cleaner to the clean air outlet 24 during normal operation thereof. Opening the body 22 of the vacuum cleaner to carry out this operation also has the effect of closing off the usual inlet 26 for dirty air to the main dirt separation device 14. Next, the user rotates the dirty first filter 16 by 360 degrees about its own axis. This activates a microswitch which operates the motor 10 to drive the air-moving fan 12.
However, since at this stage, the body 22 of the vacuum cleaner remains open and the usual inlet 26 for dirty air to the vacuum cleaner's main dirt separation chamber 14 remains closed, air is drawn from the atmosphere backwards through the dirty filter 16 by the fan 12 into the main dirt separation chamber 14, as represented by the arrows shown in Fig. 1 B, where the dirt from the dirty filter 16 is deposited. Once the dirty filter 16 has been rotated by a full 360 degrees, the microswitch is deactivated and the motor 10 shuts down. The filter cleaning operation being complete, the user may then close the body 22 of the vacuum cleaner once more, thereby re-opening the usual inlet 26 for dirty air to the vacuum cleaner's main dirt separation chamber 14, and the vacuum cleaner is once again ready for use.
Although this filter cleaning technique avoids the need for a user to handle the dirty filter in order to clean it, it has the disadvantage that the user must nonetheless open the vacuum cleaner and carry out a relatively complex sequence of operations, including removal and reinsertion of the filter assembly 20 into the body of the vacuum cleaner. The use of a pair of identical, interchangeable filters in this way instead of a single filter also increases the cost and complexity of manufacture.
Moreover, the user can ignore the light mounted on the exterior of the vacuum cleaner which alerts the user to the fact that a filter cleaning operation should be carried out, which would result in insufficient filter cleaning, or carry out a filter cleaning operation when not required. Thus the frequency of filter cleaning is left entirely within the control of the user.
A second example of a known filter cleaning technique is disclosed in EP 1 523 916 A, also in the name of Black & Decker Inc. This document describes a hand-holdable vacuum cleaner having a dirt cup housing a two-stage filter, comprising a first, course filter for filtering courser dirt and contained within the course filter, a second, fine filter for filtering finer dust. The second, fine filter is provided with a plurality of tabs arranged in a ring, which interengage with a corresponding plurality of drive tabs mounted in a ring on a filter cleaning wheel. The filter cleaning wheel comprises a gripping portion which is partially exposed through an exterior housing of the vacuum cleaner. Thus when a user takes hold of the gripping portion and uses it to rotate the filter cleaning wheel, the drive tabs mounted thereon engage with the corresponding tabs of the fine filter and cause it to rotate within the course filter. The fine filter is pleated and the course filter is provided with a plurality of ribs formed on the inner surface thereof. Thus as the fine filter rotates within the course filter, the ribs formed on the inner surface of the course filter successively contact the pleats of the fine filter. This agitates the fine filter, causing any accumulated dust adhering to the fine filter to be shaken off, through the holes of the course filter and into the dirt cup, which may then be emptied. This filter cleaning technique has the advantage that unlike the Electrolux filter cleaning technique described above, the user does not need to carry out a whole sequence of operations in order to clean the fine filter or remove the filter from the vacuum cleaner in order to do so. However, since the filter cleaning wheel is manually operated, when to clean the filter is again left entirely at the user's discretion. There is therefore a risk that the user will either neglect to clean the fine filter so that dust continues to accumulate thereon, thereby diminishing the vacuum cleaner's efficiency, or will rotate the filter cleaning wheel more often than is necessary in order to clean the filter, thereby diminishing the lifetime of the fine filter by increasing the amount of wear on the pleats of the fine filter caused by the ribs formed on the inner surface of the course filter.
Finally, a third example of a known filter cleaning technique is described in EP
1 231 856 A in the name of TechTronic Industries Co., Ltd. This document discloses a vacuum cleaner having a dirt collection chamber which houses a filter element provided with a top plate having a protrusion formed thereon. A leaf spring positioned above the protrusion is maintained in a bent condition away from the protrusion by being compressed between two shoulders of a rectangular recess formed in the top wall of the dirt collection chamber. The underside of the leaf spring faces but does not contact the protrusion on the top plate of the filter element, which is exposed to the leaf spring through a central opening formed in the rectangular recess of the top wall. The upper surface of the leaf spring instead contacts an actuation member in the form of a hinged lever having an upwardly directed finger-piece and a downwardly directed nose. Thus when a user presses on the finger-piece, the nose of the actuation member pushes the leaf spring through an over-centre condition and the central region of the leaf spring moves sharply downwards into a convex configuration in which it impacts on the protrusion carried by the top 5 plate of the filter element. This results in the filter element being shaken briefly to dislodge accumulated dust adhering to the filter element therefrom, and the dislodged dust falls into the dirt collection chamber, which can then be emptied. This filter cleaning technique also has the advantage that it does a user does not need to open the vacuum cleaner in order to clean the filter element, and that the user need only press a button to carry out the filter cleaning operation. However, since the leaf spring only comes into contact with the top plate of the filter element once when the finger-piece of the actuation member is depressed, the filter element is also only shaken once, and there remains a risk that much dust will remain adhered to the filter. Moreover, once again, since when to clean the filter element is left entirely at the user's discretion, there also remains a risk that the user will forget to clean the filter element as often as is required, so that dust continues to accumulate thereon, thereby diminishing the vacuum cleaner's efficiency.
As may be seen, therefore, all of the prior art filter cleaning techniques described above have at least the disadvantage that they all leave the timing of when to perform a filter cleaning operation entirely within the control of the user of the vacuum cleaner. This presents the risk that the user will either forget to clean the filter often enough, resulting in reduced efficiency of the vacuum cleaner, or will clean the filter more often than is required, resulting in increased wear on the filter elements. Accordingly, it is an object of the present invention to provide a vacuum cleaner filter cleaning technique which avoids this problem in order to result in effective cleaning of the filter at regular intervals over the operational lifetime of the filter, but which also avoids the need for a user to handle a dirty filter in order to clean it and which obviates the need for a user to open the vacuum cleaner in order to clean the filter or to carry out a complex sequence of operations in order to do so.
In one aspect, the present invention aims to achieve this object by providing a vacuum cleaner comprising an inlet for dirty air; an outlet for clean air; a filter located in fluid communication between the inlet and the outlet; a motor; a fan driven by the motor for moving air from the inlet through the filter to the outlet; an electrical power supply for supplying power to the motor; an on/off switch for placing the motor in powered electrical connection with the fan and having a first state wherein the motor drives the fan and a second state wherein the motor does not drive the fan;
and a filter cleaning mechanism for removing dirt from the filter; wherein activation of the filter cleaning mechanism is operatively associated with the on/off switch, whereby operation of the on/off switch results in operation of the filter cleaning mechanism.
Thus the filter is only cleaned when the vacuum cleaner's on/off switch is operated. This means that the frequency of filter cleaning is related directly to the amount of usage of the vacuum cleaner, so that the filter is cleaned neither too often nor too infrequently, but just often enough.
The vacuum cleaner may further comprise a timing device, wherein operation of the on/off switch from the first state to the second state activates the filter cleaning mechanism and the timing device, and the timing device subsequently deactivates the filter cleaning mechanism. Thus each time the vacuum cleaner is switched off after having been used, the filter cleaning mechanism is activated for a short time until deactivated again by the timing device, thereby cleaning the filter ready for use next time.
Alternatively, the vacuum cleaner may further comprise a timing device, wherein operation of the on/off switch from the second state to the first state activates the filter cleaning mechanism and the timing device, whereupon the timing device delays the motor from driving the fan, and the timing device subsequently deactivates the filter cleaning mechanism and ends the delay of the motor driving the fan. Thus each time the vacuum cleaner is switched on for use, the filter cleaning mechanism is activated for a short time until deactivated again by the timing device before the motor starts to drive the fan, thereby cleaning the filter before it is used.
In a third possible embodiment, the on/off switch has a third state wherein the motor does not drive the fan, operation of the on/off switch from the first state to the second state activates the filter cleaning mechanism and operation of the on/off switch from the second state to the third state deactivates the filter cleaning mechanism. Thus each time the vacuum cleaner is switched off after having been used, the filter cleaning mechanism is activated for a short time until deactivated again by the user operating the switch into its third state, thereby cleaning the filter ready for use next time.
Finally, in a fourth possible alternative embodiment of the first aspect of the invention, the on/off switch has a third state wherein said motor does not drive said fan, operation of said on/off switch from the second state to the third state activates said filter cleaning mechanism and operation of said on/off switch from the third state to the first state deactivates said filter cleaning mechanism. Thus each time the vacuum cleaner is switched on for use, the filter cleaning mechanism is activated for a short time until deactivated again by the user operating the switch into its first state wherein the motor starts to drive the fan, thereby cleaning the filter before it is used.
In a second aspect, the present invention also provides a vacuum cleaner comprising an inlet for dirty air, an outlet for clean air, a filter located in fluid communication between the inlet and the outlet, a first motor, a fan driven by the first motor for moving air from the inlet through the filter to the outlet, an electrical power supply for supplying power to the first motor, an electrically powered filter cleaning mechanism for removing dirt from the filter, a user-operated switch for activating the filter cleaning mechanism, whereby operation of the switch results in operation of the filter cleaning mechanism, and a timing device, wherein operation of the switch activates the filter cleaning mechanism and the timing device, and the timing device subsequently deactivates the filter cleaning mechanism.
Thus a user of the vacuum cleaner may clean the filter merely by operating the switch without the need to carry out a complex sequence of operations, or remove the filter from the vacuum cleaner in order to do so. Also, in order to operate the filter cleaning mechanism, the user need only operate the switch once, which will activate the filter cleaning mechanism for a short time until it is deactivated again by the timing device.
In one possible embodiment of the second aspect of the invention, the switch has a first state in which the filter cleaning mechanism is activated and a second state in which the filter cleaning mechanism is de-activated, and the switch latches in the first and second states thereof unless operated. Thus a user may switch the filter cleaning mechanism on and off by operating the switch each time.
In a second possible alternative embodiment of the second aspect of the invention, the switch has a first state in which the filter cleaning mechanism is activated and a second state in which the filter cleaning mechanism is de-activated, and the switch is monostable in the second state thereof, but must be held by a user in the first state thereof. Thus in order to operate the filter cleaning mechanism, the user must hold the switch in the second state and the filter cleaning mechanism will only continue to operate for as long as the switch is held in this fashion.
Further features and advantages of the present invention will become apparent from the following detailed description, which is given by way of example and in association with the accompanying drawings, in which:
Fig. 1A schematically shows a prior art filter cleaning mechanism in a first mode of operation thereof;
Fig. 1B schematically shows the prior art filter cleaning mechanism of Fig. 1A
in a second mode of operation thereof;
Fig. 2 is a perspective view of a vacuum cleaner with a removable dust collection chamber having a filter cleaning mechanism according to a first embodiment of the present invention;
Fig. 3 is a cross-sectional view through the removable dust collection chamber of the vacuum cleaner shown in Fig. 2;
Fig 4 is a partially cut-away perspective view of the dust collection chamber shown in Fig. 3, illustrating certain aspects of the filter cleaning mechanism;
Fig. 5 is a perspective view of the dust collection chamber shown in Fig. 3, illustrating other aspects of the filter cleaning mechanism;
Fig. 6 is a perspective view of a removable dust collection chamber of a vacuum cleaner comprising a filter cleaning mechanism according to a second embodiment of the present invention;
Fig. 7 is a close-up view of a part of the dust collection chamber of either the first or second embodiment, showing a bowl release mechanism;
Fig. 8 is a similar view to Fig. 7 with some of the components of the bowl release mechanism removed for the purposes of illustration and explanation;
Fig. 9A is a partial cross-sectional view of the bowl release mechanism of Fig. 7 in a first position thereof; and Fig. 9B is a partial cross-sectional view of the bowl release mechanism of Fig. 7 in a second position thereof.
Referring firstly to Fig. 2, there is shown the body 22 of a vacuum cleaner comprising a removable dust collection chamber 28. The removable dust collection chamber 28 includes a dirt separation device which will be described in greater detail below. Dirty air enters the vacuum cleaner via a dirty air inlet 26, passes through the dirt separation device and exits the vacuum cleaner via a pair of clean air outlets 24 provided on opposite sides of the body 22 of the vacuum cleaner, in the manner illustrated by the arrows labelled A and B in Fig. 2. Because of the orientation of the vacuum cleaner body as shown in Fig. 2, only one of the clean air outlets 24 can be seen in this drawing. A hose and floor-cleaning head (or other similar accessory, such as an upholstery brush or crevice tool), which would normally be attached to the dirty air inlet 26, have also been omitted from Fig. 2 for the purposes of greater clarity in the illustration. The vacuum cleaner is switched on and off by a user depressing an on/off switch 30 mounted on the top of the body 22. Mains electrical power is supplied to the vacuum cleaner by a cable (not shown) which enters the body 22 via an access point on the rear of the body. The cable is wound onto a spring-loaded and ratcheted drum within the body 22, and may be retracted back into body by a user depressing a cable-rewind button 32, which disengages the ratchet, allowing the cable to return into the body under the action of the spring. A pivoting handle 34 allows the user to pick up body 22, which is also provided with wheels (only one of which can be seen in Fig. 2) for moving the vacuum cleaner across a floor. A
further handle 38 provided on the dust collection chamber 28 allows a user to remove the dust collection chamber 28 from body 22 for emptying dust and dirt therefrom, but in order to do so, the user must firstly release the dust collection chamber from body 22 by squeezing a pair of spring-loaded levers 40 in the directions indicated in Fig. 2 by the arrows labelled C and C'. This action disengages the ends of levers 40 from beneath a pair of overhanging tabs 43 provided on body 22 and allows the dust 5 collection chamber 28 then to be lifted out of body 22 using handle 38 in a direction towards the viewer.
Turning now to Fig. 3, there is shown a cross-sectional view through the dust collection chamber 28. The dust collection chamber includes a dirt separation device 10 comprising a course filter 42 and a pleated fine filter 44. The course filter 42 is made of a rigid plastics material and includes a large number of small holes 46.
The pleated fine filter 44 is made of a porous woven material and may also be provided with a non-stick coating on the outer surface thereof. During operation of the vacuum cleaner, dirty air enters the dust collection chamber from the dirty air inlet 26 via an aperture 48 formed in a side wall of the dust collection chamber 28 in the direction indicated by the arrow labelled D in Fig.3. The dirty air then swirls around the outside of course filter 42, with dust and dirt being thrown outwardly under the action of centrifugal force and air being drawn inwardly through the large number of small holes 46 formed in the course filter 42, which prevent the passage of any remaining large dirt particles therethrough. The partially filtered air then passes through the pleated fine filter 44, which captures remaining fine particles of dust, and clean air exits the dust collection chamber 28 in the direction indicated by the arrow labelled E
in Fig. 3. Handle 38 incorporates a hollow passage 50 placing the dust collection chamber 28 in fluid communication with the main body 22 of the vacuum cleaner.
Filtered air therefore passes along hollow passage 50 from the dust collection chamber 28 to body 22. The body 22 houses a motor and a fan driven by the motor, which during operation of the vacuum cleaner, generates the movement of air through the dust collection chamber 28 into the body 22 just described.
Meanwhile, dust and dirt separated out from the air collect in the bottom of the dust collection chamber 28 under the action of gravity, in the region indicated in Fig. 3 by reference numeral 52. A series of baffles 54 formed in the bottom of the dust collection chamber 28 help to trap the dust and dirt. The bottom of the dust collection chamber 28 is also provided with a trap-door 56 which can be opened by a user in order to empty the dust collection chamber, in a manner to be described in greater detail below.
Whereas large particles of dirt which are caught by the course filter 42 are heavy enough to fall to the bottom of the dust collection chamber 28 under their own weight, fine particles of dust which are caught by the pleated fine filter 44 adhere thereto and must therefore be dislodged in order to prevent the pleated fine filter from becoming blocked. This is achieved in the following fashion. The inner surface of the course filter 42 is provided with a plurality of ribs 58 which interengage with the pleats of the fine filter 44. The fine filter 44 is free to rotate within the dust collection chamber 28 relative to the course filter 42, and may be caused to do so in a manner which will be described shortly in relation to Fig. 4. Thus as the fine filter 44 rotates within the course filter 42, the ribs 58 formed on the inner surface of the course filter successively contact the pleats of the fine filter 44. This agitates the fine filter, causing any accumulated dust adhering to the fine filter to be shaken off and to fall to the bottom of the dust collection chamber. The non-stick coating formed on the outer surface of the fine filter aids in this process. The dislodged dust then collects in the region indicated in Fig. 3 by reference numeral 60, and can be emptied from the dust collection chamber by a user opening trap-door 56.
Turning now to Fig. 4, the filter cleaning mechanism which allows fine filter to be cleaned in this manner will now be described. The pleats of the fine filter 44 are mounted in a frame comprising a bottom portion 62 and a top portion 64 connected to each other by pillars 66. Top portion 64 of this frame is fixed to a rotatable hub 68 in a ring, the cross-section of this ring being indicated in Fig. 4 by reference numeral 70. The rotatable hub 68 is free to rotate about its own axis within the lid of the dust collection chamber 28. The lid of the dust collection chamber is itself hollow and comprises a lower surface (labelled 72 in Fig. 4) and an upper surface, which has been removed in Fig. 4 in order to reveal a train of gears contained within the hollow space of the lid. Rotatable hub 68 is also provided with a plurality of gear teeth on its outer surface, which are not visible in Fig. 4, but which may instead be seen in Fig. 5, where they are labelled by reference numeral 80.
These gear teeth 80 successively contact a first wheel of the train of gears 76 at the point indicated in Fig. 4 by reference numeral 74. The train of gears 76 is in turn driven by a motor 78, which is a second motor of the vacuum cleaner, additional to the motor mounted in the body 22 which drives the fan for drawing air through the vacuum cleaner during operation thereof. Instead, the second motor 78 is dedicated to operating the filter cleaning mechanism by causing hub 68 to rotate, thereby also indirectly rotating the fine filter 44 and causing the pleats thereof to successively contact the ribs 58 formed on the inner surface of the course filter 42.
In the alternative embodiment shown in Fig. 6, in place of the train of gears 76, the gear teeth 80 formed around the outside of rotatable hub 68 may instead engage with teeth provided on the inside of a rubber drive belt 82 for transmitting rotary motion from the second motor 78 to the hub 68. In either embodiment, however, second motor 78 is permanently mounted to the exterior of dust collection chamber 28, so that when the dust collection chamber is removed from the body 22 of the vacuum cleaner by a user in order to allow it to be emptied, the motor and drive train for transmitting rotary motion from the motor to the hub remain undisturbed.
The source of power for motor 78 may be the same as the source of power for the main motor of the vacuum cleaner which drives the fan for moving air through the vacuum cleaner from the dirty air inlet to the clean air outlet.
Alternatively, the second motor 78 may have its own separate source of power. Motor 78 may also be battery powered or mains powered. In the event that it is battery powered, the battery may be permanently in electrical connection with the motor and also mounted to the exterior of dust collection chamber 28. Alternatively, however, the battery may instead be housed within the body 22 of the vacuum cleaner and electrically connected to the motor via electrical contact points only when dust collection chamber 28 is docked into body 22. A similar arrangement by which electrical power is supplied to motor 78 via electrical contacts can also be used in the event that motor 78 is mains powered. In a further alternative embodiment, the filter cleaning mechanism may be driven by the main motor of the vacuum cleaner which drives the fan for moving air through the vacuum cleaner from the dirty air inlet to the clean air outlet, without the need for second motor 78. In such a case, the power output from the main motor must be moderated by suitable gearing and/or control circuitry to ensure that the lower power demands of the filter cleaning mechanism and the higher power demands of the fan may both be met by the same motor.
Fig. 7 is a close-up view of a part of the dust collection chamber of either the first or second embodiment, showing a bowl release mechanism;
Fig. 8 is a similar view to Fig. 7 with some of the components of the bowl release mechanism removed for the purposes of illustration and explanation;
Fig. 9A is a partial cross-sectional view of the bowl release mechanism of Fig. 7 in a first position thereof; and Fig. 9B is a partial cross-sectional view of the bowl release mechanism of Fig. 7 in a second position thereof.
Referring firstly to Fig. 2, there is shown the body 22 of a vacuum cleaner comprising a removable dust collection chamber 28. The removable dust collection chamber 28 includes a dirt separation device which will be described in greater detail below. Dirty air enters the vacuum cleaner via a dirty air inlet 26, passes through the dirt separation device and exits the vacuum cleaner via a pair of clean air outlets 24 provided on opposite sides of the body 22 of the vacuum cleaner, in the manner illustrated by the arrows labelled A and B in Fig. 2. Because of the orientation of the vacuum cleaner body as shown in Fig. 2, only one of the clean air outlets 24 can be seen in this drawing. A hose and floor-cleaning head (or other similar accessory, such as an upholstery brush or crevice tool), which would normally be attached to the dirty air inlet 26, have also been omitted from Fig. 2 for the purposes of greater clarity in the illustration. The vacuum cleaner is switched on and off by a user depressing an on/off switch 30 mounted on the top of the body 22. Mains electrical power is supplied to the vacuum cleaner by a cable (not shown) which enters the body 22 via an access point on the rear of the body. The cable is wound onto a spring-loaded and ratcheted drum within the body 22, and may be retracted back into body by a user depressing a cable-rewind button 32, which disengages the ratchet, allowing the cable to return into the body under the action of the spring. A pivoting handle 34 allows the user to pick up body 22, which is also provided with wheels (only one of which can be seen in Fig. 2) for moving the vacuum cleaner across a floor. A
further handle 38 provided on the dust collection chamber 28 allows a user to remove the dust collection chamber 28 from body 22 for emptying dust and dirt therefrom, but in order to do so, the user must firstly release the dust collection chamber from body 22 by squeezing a pair of spring-loaded levers 40 in the directions indicated in Fig. 2 by the arrows labelled C and C'. This action disengages the ends of levers 40 from beneath a pair of overhanging tabs 43 provided on body 22 and allows the dust 5 collection chamber 28 then to be lifted out of body 22 using handle 38 in a direction towards the viewer.
Turning now to Fig. 3, there is shown a cross-sectional view through the dust collection chamber 28. The dust collection chamber includes a dirt separation device 10 comprising a course filter 42 and a pleated fine filter 44. The course filter 42 is made of a rigid plastics material and includes a large number of small holes 46.
The pleated fine filter 44 is made of a porous woven material and may also be provided with a non-stick coating on the outer surface thereof. During operation of the vacuum cleaner, dirty air enters the dust collection chamber from the dirty air inlet 26 via an aperture 48 formed in a side wall of the dust collection chamber 28 in the direction indicated by the arrow labelled D in Fig.3. The dirty air then swirls around the outside of course filter 42, with dust and dirt being thrown outwardly under the action of centrifugal force and air being drawn inwardly through the large number of small holes 46 formed in the course filter 42, which prevent the passage of any remaining large dirt particles therethrough. The partially filtered air then passes through the pleated fine filter 44, which captures remaining fine particles of dust, and clean air exits the dust collection chamber 28 in the direction indicated by the arrow labelled E
in Fig. 3. Handle 38 incorporates a hollow passage 50 placing the dust collection chamber 28 in fluid communication with the main body 22 of the vacuum cleaner.
Filtered air therefore passes along hollow passage 50 from the dust collection chamber 28 to body 22. The body 22 houses a motor and a fan driven by the motor, which during operation of the vacuum cleaner, generates the movement of air through the dust collection chamber 28 into the body 22 just described.
Meanwhile, dust and dirt separated out from the air collect in the bottom of the dust collection chamber 28 under the action of gravity, in the region indicated in Fig. 3 by reference numeral 52. A series of baffles 54 formed in the bottom of the dust collection chamber 28 help to trap the dust and dirt. The bottom of the dust collection chamber 28 is also provided with a trap-door 56 which can be opened by a user in order to empty the dust collection chamber, in a manner to be described in greater detail below.
Whereas large particles of dirt which are caught by the course filter 42 are heavy enough to fall to the bottom of the dust collection chamber 28 under their own weight, fine particles of dust which are caught by the pleated fine filter 44 adhere thereto and must therefore be dislodged in order to prevent the pleated fine filter from becoming blocked. This is achieved in the following fashion. The inner surface of the course filter 42 is provided with a plurality of ribs 58 which interengage with the pleats of the fine filter 44. The fine filter 44 is free to rotate within the dust collection chamber 28 relative to the course filter 42, and may be caused to do so in a manner which will be described shortly in relation to Fig. 4. Thus as the fine filter 44 rotates within the course filter 42, the ribs 58 formed on the inner surface of the course filter successively contact the pleats of the fine filter 44. This agitates the fine filter, causing any accumulated dust adhering to the fine filter to be shaken off and to fall to the bottom of the dust collection chamber. The non-stick coating formed on the outer surface of the fine filter aids in this process. The dislodged dust then collects in the region indicated in Fig. 3 by reference numeral 60, and can be emptied from the dust collection chamber by a user opening trap-door 56.
Turning now to Fig. 4, the filter cleaning mechanism which allows fine filter to be cleaned in this manner will now be described. The pleats of the fine filter 44 are mounted in a frame comprising a bottom portion 62 and a top portion 64 connected to each other by pillars 66. Top portion 64 of this frame is fixed to a rotatable hub 68 in a ring, the cross-section of this ring being indicated in Fig. 4 by reference numeral 70. The rotatable hub 68 is free to rotate about its own axis within the lid of the dust collection chamber 28. The lid of the dust collection chamber is itself hollow and comprises a lower surface (labelled 72 in Fig. 4) and an upper surface, which has been removed in Fig. 4 in order to reveal a train of gears contained within the hollow space of the lid. Rotatable hub 68 is also provided with a plurality of gear teeth on its outer surface, which are not visible in Fig. 4, but which may instead be seen in Fig. 5, where they are labelled by reference numeral 80.
These gear teeth 80 successively contact a first wheel of the train of gears 76 at the point indicated in Fig. 4 by reference numeral 74. The train of gears 76 is in turn driven by a motor 78, which is a second motor of the vacuum cleaner, additional to the motor mounted in the body 22 which drives the fan for drawing air through the vacuum cleaner during operation thereof. Instead, the second motor 78 is dedicated to operating the filter cleaning mechanism by causing hub 68 to rotate, thereby also indirectly rotating the fine filter 44 and causing the pleats thereof to successively contact the ribs 58 formed on the inner surface of the course filter 42.
In the alternative embodiment shown in Fig. 6, in place of the train of gears 76, the gear teeth 80 formed around the outside of rotatable hub 68 may instead engage with teeth provided on the inside of a rubber drive belt 82 for transmitting rotary motion from the second motor 78 to the hub 68. In either embodiment, however, second motor 78 is permanently mounted to the exterior of dust collection chamber 28, so that when the dust collection chamber is removed from the body 22 of the vacuum cleaner by a user in order to allow it to be emptied, the motor and drive train for transmitting rotary motion from the motor to the hub remain undisturbed.
The source of power for motor 78 may be the same as the source of power for the main motor of the vacuum cleaner which drives the fan for moving air through the vacuum cleaner from the dirty air inlet to the clean air outlet.
Alternatively, the second motor 78 may have its own separate source of power. Motor 78 may also be battery powered or mains powered. In the event that it is battery powered, the battery may be permanently in electrical connection with the motor and also mounted to the exterior of dust collection chamber 28. Alternatively, however, the battery may instead be housed within the body 22 of the vacuum cleaner and electrically connected to the motor via electrical contact points only when dust collection chamber 28 is docked into body 22. A similar arrangement by which electrical power is supplied to motor 78 via electrical contacts can also be used in the event that motor 78 is mains powered. In a further alternative embodiment, the filter cleaning mechanism may be driven by the main motor of the vacuum cleaner which drives the fan for moving air through the vacuum cleaner from the dirty air inlet to the clean air outlet, without the need for second motor 78. In such a case, the power output from the main motor must be moderated by suitable gearing and/or control circuitry to ensure that the lower power demands of the filter cleaning mechanism and the higher power demands of the fan may both be met by the same motor.
How the trap-door 56 on the bottom of dust collection chamber 28 is opened by a user, in order to allow the dust collection chamber to be emptied, will now be described with reference to Figs. 7 and 8. Mounted on the side of dust collection chamber 28 is a plunger 84, which slides on a guide rail 86. At the top end of plunger 84 is a push-button 88, which allows the user to depress the plunger in the direction indicated in Fig. 7 by arrow F, against the force of a first compression spring 90 (shown in Fig. 8) which is mounted on a spring buffer 92 and is held in place by engagement with a retaining pip 85. When the plunger 84 is depressed in this manner, the bottom end of plunger 84 pushes against a latch 94 held in a hinge mounting 96, the plunger 84 coming into contact with the latch 94 at a point of contact indicated in Figs. 9A and 9B by reference numeral 95. The hinge mounting 96 provides an axis of rotation 97 (as shown in Fig. 8), about which the latch 94 is able to pivot. The pressure applied to latch 94 by the bottom end of plunger therefore causes latch 94 to rotate about the axis 97 against the force of a second compression spring 98 mounted on the side of dust collection bowl 28. The end of latch 94 remote from axis 97 is also provided with a retaining lip 100, which is able to engage with a catch 102 formed on trap-door 56. On the opposite side of trap-door 56 from catch 102, the trap-door 56 is mounted to dust collection chamber 28 via a spring-loaded hinge 104, which may be seen in both Figs. 5 and 6. Thus when latch 94 rotates about axis 97 against the force of the second compression spring 98, retaining lip 100 is disengaged from catch 102 and trap-door 56 swings open under the spring force of hinge 104, thereby emptying accumulated dust and dirt from within the dust collection chamber 28.
The trap-door 56 may also be opened by a user pushing directly on latch 94, which is also provided with a push-button for that purpose, without the need for the user to depress plunger 84 in order to do so. However, when the user releases the pressure placed on latch 94 either by releasing the pressure applied to it directly or by releasing the pressure previously applied to push-button 88, plunger 84 and latch 94 return to their starting positions under the action of the two compression springs 90 and 98. The user is then able to close trap-door 56 again by swinging it shut against the spring force of hinge 104, until catch 102 re-engages with the retaining lip 100 of latch 94. The relaxed and compressed states of compression springs 90 and 98 are respectively shown in Figs. 9A and 9B.
The trap-door 56 may also be opened by a user pushing directly on latch 94, which is also provided with a push-button for that purpose, without the need for the user to depress plunger 84 in order to do so. However, when the user releases the pressure placed on latch 94 either by releasing the pressure applied to it directly or by releasing the pressure previously applied to push-button 88, plunger 84 and latch 94 return to their starting positions under the action of the two compression springs 90 and 98. The user is then able to close trap-door 56 again by swinging it shut against the spring force of hinge 104, until catch 102 re-engages with the retaining lip 100 of latch 94. The relaxed and compressed states of compression springs 90 and 98 are respectively shown in Figs. 9A and 9B.
Claims (11)
1. A vacuum cleaner comprising:
an inlet for dirty air;
an outlet for clean air;
a filter located in fluid communication between said inlet and said outlet;
a first motor;
a fan driven by said first motor for moving air from said inlet through said filter to said outlet;
an electrical power supply for supplying power to said first motor;
an electrically powered filter cleaning mechanism for removing dirt from said filter;
a user-operated switch for activating said filter cleaning mechanism, whereby operation of said switch results in operation of said filter cleaning mechanism; and a timing device, wherein operation of said switch activates said filter cleaning mechanism and said timing device, and said timing device subsequently deactivates said filter cleaning mechanism.
an inlet for dirty air;
an outlet for clean air;
a filter located in fluid communication between said inlet and said outlet;
a first motor;
a fan driven by said first motor for moving air from said inlet through said filter to said outlet;
an electrical power supply for supplying power to said first motor;
an electrically powered filter cleaning mechanism for removing dirt from said filter;
a user-operated switch for activating said filter cleaning mechanism, whereby operation of said switch results in operation of said filter cleaning mechanism; and a timing device, wherein operation of said switch activates said filter cleaning mechanism and said timing device, and said timing device subsequently deactivates said filter cleaning mechanism.
2. A vacuum cleaner according to claim 1, wherein the filter is pleated and the filter cleaning mechanism comprises:
a plurality of ribs which interengage with said pleats;
a hub connected to said filter about which said filter is able to rotate relative to said ribs:
a source of rotary motion; and means for transferring rotary motion from said source to said hub.
a plurality of ribs which interengage with said pleats;
a hub connected to said filter about which said filter is able to rotate relative to said ribs:
a source of rotary motion; and means for transferring rotary motion from said source to said hub.
3. A vacuum cleaner according to claim 2, wherein said source of rotary motion is said first motor.
4. A vacuum cleaner according to claim 2, wherein said source of rotary motion is a second motor additional to the first motor and which second motor is dedicated to driving said filter cleaning mechanism.
5. A vacuum cleaner according to any one of claims 2 to 4, wherein said means for transferring rotary motion is a train of gears.
6. A vacuum cleaner according to any one of claims 2 to 4, wherein said means for transferring rotary motion is a rubber belt.
7. A vacuum cleaner according to any one of claims 2 to 6, wherein said filter is a fine dust filter and said ribs are mounted on an inner surface of a course dirt filter surrounding said fine dust filter.
8. A vacuum cleaner according to any one of claims 1 to 7, wherein said electrical power supply comprises a mains electrical cable.
9. A vacuum cleaner according to any one of claims 1 to 8, wherein said electrical power supply comprises a first battery.
10. A vacuum cleaner according to any one of claims 4 to 9, wherein said electrical power supply is for supplying power to said second motor as well as to said first motor.
11. A vacuum cleaner according to any one of claims 4 to 9, further comprising a second battery additional to said electrical power supply and which second battery is dedicated to supplying power to said second motor.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP06100994.0A EP1813180B2 (en) | 2006-01-27 | 2006-01-27 | Vacuum cleaner filter cleaning mechanisms |
| EP06100994.0 | 2006-01-27 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2574750A1 CA2574750A1 (en) | 2007-07-27 |
| CA2574750C true CA2574750C (en) | 2010-11-16 |
Family
ID=35998399
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2574750A Expired - Fee Related CA2574750C (en) | 2006-01-27 | 2007-01-22 | Vacuum cleaner filter cleaning mechanisms |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US8032984B2 (en) |
| EP (1) | EP1813180B2 (en) |
| CN (1) | CN101006909B (en) |
| AT (1) | ATE460108T1 (en) |
| AU (1) | AU2007200171B2 (en) |
| CA (1) | CA2574750C (en) |
| DE (1) | DE602006012794D1 (en) |
| NZ (1) | NZ552763A (en) |
Families Citing this family (36)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7588610B2 (en) * | 2004-11-25 | 2009-09-15 | Sanyo Electric Co., Ltd. | Dust collector and vacuum cleaner having the same |
| US20070289444A1 (en) * | 2006-06-14 | 2007-12-20 | Toshiba Tec Kabushiki Kaisha | Vacuum cleaner having a filter capable of collecting dust |
| WO2009026611A1 (en) * | 2007-08-29 | 2009-03-05 | Mario John Chaves Barker | A vacuum cleaner |
| DE202007015242U1 (en) * | 2007-10-26 | 2007-12-27 | Electrostar Schöttle GmbH & Co. KG | suction device |
| FR2923703B1 (en) * | 2007-11-15 | 2012-09-21 | Seb Sa | FILTER CLEANING DEVICE FOR VACUUM CLEANER |
| FR2948003B1 (en) * | 2009-07-17 | 2015-02-27 | Seb Sa | DEVICE FOR FILTRATION OF WASTE FOR VACUUM |
| DE102009035601A1 (en) | 2009-07-31 | 2011-02-10 | BSH Bosch und Siemens Hausgeräte GmbH | Vacuum cleaner with locking unit |
| US20110247170A1 (en) * | 2010-04-13 | 2011-10-13 | Jones Christopher W S | Trash Bin Vacuum Adapter Apparatus |
| JP2011258708A (en) * | 2010-06-08 | 2011-12-22 | Sanyo Electric Co Ltd | Electronic device |
| ES2768282T3 (en) | 2010-08-26 | 2020-06-22 | Alfa Laval Corp Ab | Device to remove particles from a gas stream |
| DE102010043159B4 (en) * | 2010-10-29 | 2015-02-19 | BSH Bosch und Siemens Hausgeräte GmbH | Vacuum cleaner with a centrifugal separator |
| DE102011017792A1 (en) * | 2011-04-29 | 2012-10-31 | BSH Bosch und Siemens Hausgeräte GmbH | Dust separation device for bag-less vacuum cleaner, has dust sieve forming part of inner wall and extended in height portion of air inlet with respect to longitudinal axis of separation area, and filter arranged downstream of sieve |
| DE102011075013A1 (en) | 2011-04-29 | 2012-10-31 | BSH Bosch und Siemens Hausgeräte GmbH | Filter for filtering device filtering air with flat, air permeable filter material, has transmission element mechanically coupled with filter material, where pulse is transmitted over transmission element |
| DE102011088965A1 (en) * | 2011-12-19 | 2013-06-20 | BSH Bosch und Siemens Hausgeräte GmbH | Filter apparatus, method and computer program for filtering particles |
| US9549650B2 (en) * | 2012-08-09 | 2017-01-24 | Dyson Technology Limited | Cleaning appliance |
| US20140196244A1 (en) * | 2013-01-16 | 2014-07-17 | Techtronic Floor Care Technology Limited | Cleaning apparatus with backlit debris receptacle and method of illuminating dirt collection |
| DE102013108565B4 (en) | 2013-08-08 | 2024-03-14 | Miele & Cie. Kg | Vacuum cleaner with a filter element |
| US9550139B2 (en) | 2014-03-04 | 2017-01-24 | Vincent James Madonia | Apparatus and system for cleaning a filter |
| US9756999B2 (en) | 2014-12-22 | 2017-09-12 | Aktiebolaget Electrolux | Vacuum cleaner filtration system with filter cleaning mode |
| GB2539924B (en) * | 2015-07-01 | 2017-10-11 | Dyson Technology Ltd | A separating apparatus |
| GB2539933B (en) | 2015-07-01 | 2017-10-11 | Dyson Technology Ltd | A separating apparatus |
| GB2540134B (en) * | 2015-07-01 | 2017-10-11 | Dyson Technology Ltd | A separating apparatus |
| JP2016026686A (en) * | 2015-10-15 | 2016-02-18 | シャープ株式会社 | Cyclone dust collector and vacuum cleaner |
| ES2950260T3 (en) * | 2016-03-31 | 2023-10-06 | Lg Electronics Inc | cleaning device |
| CN206910990U (en) * | 2016-09-13 | 2018-01-23 | 沈阳隆基电磁科技股份有限公司 | A kind of vacuum cleaning equipment for monocrystal growing furnace |
| GB2557304B (en) * | 2016-12-05 | 2022-06-01 | Beacon Group Int Ltd | A filter system and a vacuum cleaner incorporating a filter system |
| US10660497B2 (en) | 2017-06-12 | 2020-05-26 | Emerson Electric Co. | Upright vacuum cleaner having switch to detect a filter assembly |
| DE102018204172A1 (en) * | 2017-12-27 | 2019-06-27 | Robert Bosch Gmbh | Battery-suction device |
| US11375861B2 (en) * | 2018-04-20 | 2022-07-05 | Omachron Intellectual Property Inc. | Surface cleaning apparatus |
| CN112261983B (en) * | 2018-06-11 | 2022-06-10 | 沃尔沃卡车集团 | Air filter housing with closing device, air filter and vehicle |
| CN109288450B (en) * | 2018-09-11 | 2021-03-26 | 安克创新科技股份有限公司 | Intelligent self-moving equipment and dust box assembly thereof |
| KR102196499B1 (en) * | 2019-08-26 | 2020-12-29 | 조선대학교산학협력단 | case for fine dust mask |
| CN113576318A (en) * | 2020-04-30 | 2021-11-02 | 添可智能科技有限公司 | Filter device, cleaning apparatus and cleaning method |
| DE102021205492B4 (en) | 2021-05-31 | 2023-11-23 | BSH Hausgeräte GmbH | Filter unit for a vacuum cleaner |
| FR3134305A1 (en) * | 2022-04-12 | 2023-10-13 | Seb S.A. | Unclogging a vacuum cleaner filter by moving a mass |
| CN117404218A (en) * | 2023-12-13 | 2024-01-16 | 江苏函越智能科技有限公司 | Air filter capable of reducing dust emission |
Family Cites Families (177)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE630169C (en) | 1936-05-22 | Siemens Schuckertwerke Akt Ges | Hand-held vacuum cleaner with a suction nozzle arranged on one end | |
| US156288A (en) | 1874-10-27 | Improvement in cones for smoke-stacks | ||
| FR1094603A (en) | 1955-05-23 | |||
| DE620117C (en) | 1935-10-14 | Karl Ludwig Lanninger | Procedure for large field irrigation | |
| US971044A (en) | 1909-02-16 | 1910-09-27 | Charles G Hutchinson | Hand vacuum-cleaner. |
| US1156235A (en) | 1910-06-11 | 1915-10-12 | James B Kirby | Handhold vacuum-cleaner. |
| US1420665A (en) | 1920-05-10 | 1922-06-27 | John W Newcombe | Centrifugal dust separator |
| US1768617A (en) | 1924-01-14 | 1930-07-01 | Delco Light Co | Domestic appliance |
| US1786384A (en) | 1927-01-12 | 1930-12-23 | Willis J Amstutz | Vacuum brush |
| US2036789A (en) | 1935-01-29 | 1936-04-07 | Electric Vacuum Cleaner Co | Suction cleaner tool |
| US2226630A (en) | 1936-12-19 | 1940-12-31 | Alvin C Mccord | Cleaning device |
| US2198568A (en) | 1937-09-08 | 1940-04-23 | Jr Edward H Yonkers | Suction cleaner |
| US2242278A (en) | 1940-04-19 | 1941-05-20 | Jr Edward H Yonkers | Suction cleaner |
| US2439182A (en) | 1943-09-27 | 1948-04-06 | Air Way Electric Appl Corp | Blower control device for suction cleaners |
| US2564468A (en) | 1946-02-15 | 1951-08-14 | Electrolux Corp | Vacuum cleaner |
| DE1607730U (en) | 1949-08-29 | 1950-06-07 | Gustav Rasche Nachf Fa | SPRING FOR HOLDING THE LOCATION OF A LOCKING PART, E.G. OVERFLOW HOOK OF A SIDE GATE LOCK OF POWER TRUCKS, TRAILERS OR THE LIKE. |
| US2539195A (en) | 1950-05-02 | 1951-01-23 | Gen Electric | Inlet dirt deflector and filter arrangement for suction cleaners |
| DE1611157U (en) | 1950-06-22 | 1950-08-03 | Karl-Heinz Dr Ing Stuebing | DETACHABLE GRINDING TABLE. |
| DE1768312U (en) | 1954-02-01 | 1958-06-12 | Elisa Danuser | HAND DEVICE WITH BRUSH. |
| DE1059636B (en) * | 1954-07-08 | 1959-06-18 | Siemens Elektrogeraete Gmbh | Vacuum cleaner with a cleaning device for the dust filter |
| DE1403131A1 (en) | 1956-07-31 | 1969-02-20 | Therese Bieding Geb Hannig | Filter for vacuum cleaner |
| FR1215496A (en) | 1958-02-14 | 1960-04-19 | Fortuna Werke Spezialmaschinen | Dust filter |
| DE1403128A1 (en) | 1958-04-22 | 1968-11-28 | Fritz Donner | Paper dust bags for vacuum cleaners |
| DE1874119U (en) | 1961-05-05 | 1963-06-20 | Siemens Elektrogeraete Gmbh | FILTER ARRANGEMENT FOR VACUUM CLEANER. |
| DE1428322A1 (en) | 1962-04-03 | 1968-12-12 | Electrolux Ab | vacuum cleaner |
| DE1453089A1 (en) | 1963-02-23 | 1968-12-12 | Tokio Denki Kabushiki Kaisha | vacuum cleaner |
| US3296781A (en) | 1964-11-10 | 1967-01-10 | Auergesellschaft Gmbh | Filter |
| US3339350A (en) | 1965-05-28 | 1967-09-05 | Monsanto Co | Gas-liquid separator |
| US3465413A (en) | 1966-10-25 | 1969-09-09 | Universal Filters Inc | Method of manufacturing pleated filters |
| DE1959657U (en) | 1967-02-16 | 1967-05-03 | Hugo Heidemann | SUCTION CLEANING BRUSH, IN PARTICULAR CLOTHING BRUSH. |
| DE1988318U (en) | 1968-01-16 | 1968-06-27 | Kurt Dr Ing Zenkner | VACUUM CLEANER. |
| US3486626A (en) | 1968-02-01 | 1969-12-30 | Sam Close | Replaceable medium,extended area filter unit |
| US3561824A (en) | 1968-05-22 | 1971-02-09 | Virgil A Homan | Cone separator |
| US3524211A (en) | 1968-07-05 | 1970-08-18 | Haley Corp | Vacuum cleaner with air director tube |
| DE6813511U (en) | 1968-12-29 | 1969-05-14 | Hartmut Esslinger | HAND VACUUM CLEANER |
| US3731465A (en) | 1970-01-19 | 1973-05-08 | Hitachi Ltd | Electric vacuum cleaner |
| AU473033B2 (en) | 1971-06-03 | 1976-06-10 | Matsushita Electric Industrial Co., Ltd. | Electric vacuum cleaner |
| JPS5242777B2 (en) | 1971-10-28 | 1977-10-26 | ||
| US3898488A (en) | 1972-02-28 | 1975-08-05 | Mallory & Co Inc P R | Electric motor construction |
| US3856488A (en) | 1972-09-05 | 1974-12-24 | Mitsubishi Electric Corp | Electric vacuum cleaner |
| JPS544854Y2 (en) | 1972-09-05 | 1979-03-01 | ||
| US3861381A (en) | 1973-04-02 | 1975-01-21 | Esb Inc | Disposable respirator |
| US3898414A (en) | 1974-05-06 | 1975-08-05 | Dollinger Corp | Filter unit with cleaning attachment |
| US3921250A (en) | 1974-05-29 | 1975-11-25 | Jerabek & Associates Ltd | Suction cleaner air inlet device |
| US4007026A (en) | 1975-08-13 | 1977-02-08 | Fmc Corporation | Compact dust filter system |
| USD247341S (en) | 1976-08-09 | 1978-02-28 | Cal Custom Accessories, Inc. | Portable vacuum cleaner |
| US4105420A (en) | 1977-05-23 | 1978-08-08 | Bayfront Carpet And Vacuum, Inc. | Canister vacuum cleaner with transparent lid |
| US4388582A (en) | 1978-05-31 | 1983-06-14 | Black & Decker Inc. | Apparatus and method for charging batteries |
| US4392101A (en) | 1978-05-31 | 1983-07-05 | Black & Decker Inc. | Method of charging batteries and apparatus therefor |
| US4209875A (en) | 1978-08-11 | 1980-07-01 | Black & Decker, Inc. | Cordless vacuum cleaner bowl and filter system |
| US4225814A (en) | 1978-08-11 | 1980-09-30 | Black & Decker, Inc. | Cordless vacuum cleaner storing and recharging system |
| US4248613A (en) | 1979-08-27 | 1981-02-03 | Linhart Donald E | Air precleaner for internal combustion engine |
| US4304580A (en) | 1980-08-04 | 1981-12-08 | Donaldson Company, Inc. | Air cleaner with suspended cartridge |
| US4426211A (en) | 1980-12-19 | 1984-01-17 | Sharp Kabushiki Kaisha | Vacuum cleaner with dust disposal |
| USD275427S (en) | 1981-11-30 | 1984-09-04 | Sanyo Electric Co., Ltd. | Vacuum cleaner |
| US4533370A (en) | 1982-03-30 | 1985-08-06 | Sharp Kabushiki Kaisha | Electric cleaner with minimum noise |
| DE3302297C2 (en) | 1983-01-25 | 1986-10-16 | Progress-Elektrogeräte Mauz & Pfeiffer GmbH & Co, 7000 Stuttgart | vacuum cleaner |
| DE3309162A1 (en) | 1983-03-15 | 1984-09-20 | Krups Stiftung | Battery-operated table vacuum cleaner |
| DE3325336A1 (en) | 1983-07-13 | 1985-01-24 | Bosch Siemens Hausgeraete | Dust bag for vacuum cleaners, in particular for small vacuum cleaners |
| JPS6058208A (en) | 1983-09-09 | 1985-04-04 | Kurabo Ind Ltd | Filter element and preparation thereof |
| USRE33074E (en) | 1984-03-07 | 1989-10-03 | Cic Int'l Corp. | Wet-dry vacuum cleaner |
| EP0215165B1 (en) | 1985-09-09 | 1991-07-10 | Black & Decker Inc. | Wet-dry vacuum cleaner |
| US4878930A (en) | 1984-03-15 | 1989-11-07 | W. L. Gore & Associates, Inc. | Filter cartridge |
| SE451947B (en) | 1984-05-30 | 1987-11-09 | Nederman Philip & Co Ab | Filter cleaning device |
| GB2162768B (en) | 1984-08-06 | 1989-01-11 | Tilghman Wheelabrator Ltd | Filtering apparatus |
| DE3429565A1 (en) | 1984-08-10 | 1986-02-20 | H & H Industriebedarfs- und Handels GmbH, 5000 Köln | LOW VACUUM CLEANER |
| US4716352A (en) | 1984-12-26 | 1987-12-29 | Black & Decker, Inc. | Charging base for a battery-powered appliance |
| DE8506818U1 (en) | 1985-03-08 | 1986-07-03 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Filter arrangement in a vacuum cleaner |
| KR870001812A (en) | 1985-08-08 | 1987-03-28 | 이노우에 가오루 | Mini Portable Electric Cleaner |
| DE8623695U1 (en) | 1986-09-04 | 1986-10-16 | Ing. Walter Hengst Gmbh & Co Kg, 4400 Muenster | Air filters, in particular for vacuum cleaners |
| DE8629781U1 (en) | 1986-11-07 | 1988-03-03 | Siemens Ag, 1000 Berlin Und 8000 Muenchen, De | |
| USD302876S (en) | 1987-03-05 | 1989-08-15 | Sharp Corporation | Vacuum cleaner |
| US5035024A (en) | 1987-07-24 | 1991-07-30 | Emerson Electric Co. | Portable wet/dry vacuum cleaner and recharging base |
| US5005252A (en) | 1987-07-24 | 1991-04-09 | Emerson Electric Co. | Portable wet/dry vacuum cleaner and recharging base |
| DE3727980A1 (en) | 1987-08-21 | 1989-03-02 | Bosch Siemens Hausgeraete | Vacuum cleaner, in particular hand vacuum cleaner (upright vacuum cleaner) |
| US4790306A (en) | 1987-09-25 | 1988-12-13 | Minnesota Mining And Manufacturing Company | Respiratory mask having a rigid or semi-rigid, insert-molded filtration element and method of making |
| DE3743083C2 (en) | 1987-12-18 | 1997-08-07 | Bosch Siemens Hausgeraete | Handheld vacuum cleaner |
| US4821366A (en) | 1988-05-03 | 1989-04-18 | Cic Int'l. Corp. | Wet-dry vacuum cleaner |
| US5025529A (en) | 1988-08-08 | 1991-06-25 | Emerson Electric Co. | Portable hand held vacuum cleaner |
| US4920608A (en) | 1988-08-08 | 1990-05-01 | Emerson Electric Co. | Portable hand held vacuum cleaner |
| US5065473A (en) | 1989-01-09 | 1991-11-19 | Black & Decker Inc. | Filter assembly for a vacuum cleaner |
| US4934020A (en) | 1989-01-09 | 1990-06-19 | Black & Decker Inc. | Charging unit and vacuum cleaner |
| US4947514A (en) | 1989-01-09 | 1990-08-14 | Black & Decker, Inc. | Internal contact for a charging circuit |
| US4967443A (en) | 1989-01-09 | 1990-11-06 | Black & Decker, Inc. | Filter assembly for a vacuum cleaner |
| US4920606A (en) | 1989-01-09 | 1990-05-01 | Black & Decker, Inc. | Electrical power circuit for a vacuum cleaner |
| US5074006A (en) | 1989-09-01 | 1991-12-24 | Nunzio Eremita | Pet vacuum comb |
| USD337303S (en) | 1989-12-26 | 1993-07-13 | Stuart Naft | Charger base for a hand-held vacuum cleaner or similar appliance |
| US5115538A (en) | 1990-01-24 | 1992-05-26 | Black & Decker Inc. | Vacuum cleaners |
| US5084934A (en) | 1990-01-24 | 1992-02-04 | Black & Decker Inc. | Vacuum cleaners |
| US5011058A (en) | 1990-01-30 | 1991-04-30 | Textron Inc. | Leaf blower back pack frame |
| CA2023347A1 (en) | 1990-03-01 | 1991-09-02 | Marco Ferrari | Stick type vacuum cleaner |
| US5043640A (en) | 1990-03-09 | 1991-08-27 | Orton Kevin R | RC speed controller |
| US5020187A (en) | 1990-03-19 | 1991-06-04 | Black & Decker, Inc. | Filter assembly for a vacuum cleaner |
| US5013333A (en) † | 1990-04-13 | 1991-05-07 | Tennant Company | Unattended air cleaning system for surface maintenance machine |
| US5114217A (en) | 1990-06-08 | 1992-05-19 | Leo Beiser Inc. | Double-reflection light scanner |
| USD327342S (en) | 1990-06-25 | 1992-06-23 | Joiner Electric Products Co., Ltd. | Hand held vacuum cleaner |
| DE9010910U1 (en) | 1990-07-23 | 1990-10-25 | Electrostar Schoettle Gmbh & Co, 7313 Reichenbach, De | |
| US5148094A (en) | 1990-08-10 | 1992-09-15 | Black & Decker Inc. | Charger with universal battery pack receptacle |
| DE9012439U1 (en) | 1990-08-30 | 1990-10-31 | Bosch-Siemens Hausgeraete Gmbh, 8000 Muenchen, De | |
| US5092015A (en) | 1991-01-04 | 1992-03-03 | Black & Decker Inc. | Hand-held vacuum cleaner with attachment connector |
| US5134751A (en) | 1991-01-04 | 1992-08-04 | Black & Decker Inc. | Hand-held vacuum cleaner |
| US5105505A (en) | 1991-01-04 | 1992-04-21 | Black & Decker Inc. | Hand-held vacuum cleaner |
| DE4141969A1 (en) | 1991-12-19 | 1993-06-24 | Knecht Filterwerke Gmbh | RING FILTER ELEMENT MADE OF A ZIGZAG FOLDED FILTER RAIL MATERIAL |
| DE4210061A1 (en) † | 1992-03-27 | 1993-09-30 | Wap Reinigungssysteme | Vacuum cleaner with cleaning motor and an optionally connected power tool |
| US5297311A (en) | 1992-05-04 | 1994-03-29 | Citywide Machine Wholesale, Inc. | Vacuum cleaner |
| ES2099450T3 (en) | 1992-06-24 | 1997-05-16 | Notetry Ltd | CYCLONE VACUUM CLEANER. |
| US5199963A (en) | 1992-07-30 | 1993-04-06 | Scarp Arcoline J | Dual filtering vacuum system |
| GB9221178D0 (en) | 1992-10-08 | 1992-11-25 | Vax Appliances Ltd | Pick-up heads for vacuum cleaners |
| DE4235745C2 (en) | 1992-10-23 | 1995-04-13 | Kaercher Gmbh & Co Alfred | vacuum cleaner |
| US5388302A (en) | 1993-01-08 | 1995-02-14 | Black & Decker Inc. | Vacuum cleaner housing and airflow chamber |
| USD357772S (en) | 1993-06-25 | 1995-04-25 | John Manufacturing, Ltd. | Vacuum cleaner |
| IT1278617B1 (en) | 1994-03-17 | 1997-11-24 | Gisowatt S P A Ind Elettrodome | VERTICAL EXTRACTOR, SO-CALLED BROOM, WITH TOTAL FAIRING WITHIN WHICH THE CONTROL ORGANS ARE HARMONICALLY DISTRIBUTED AND/OR ACCESSIBLE |
| DE9405599U1 (en) † | 1994-04-02 | 1994-06-09 | Kaercher Gmbh & Co Alfred | Suction device for cleaning purposes |
| US5599401A (en) | 1994-08-04 | 1997-02-04 | Jancar Industries, Inc. | Portable, hand-held, self-contained multi-surface, hydro-cleaning apparatus |
| US5611831A (en) | 1994-11-16 | 1997-03-18 | Isuzu Ceramics Research Institute Co., Ltd. | Diesel particulate filter apparatus |
| USD401021S (en) | 1994-12-05 | 1998-11-10 | Royal Appliance Mfg. Co. | Hand held vacuum cleaner |
| TW271384B (en) | 1995-01-13 | 1996-03-01 | Black & Decker Inc | Vacuum cleaner |
| ES2156236T3 (en) | 1995-06-22 | 2001-06-16 | Bsh Bosch Siemens Hausgeraete | REMOVABLE PROVISION OF A FUNCTIONAL PART IN AN OPENING OF A DUST VACUUM HOUSING. |
| US5783086A (en) | 1995-09-29 | 1998-07-21 | W. L. Gore & Associates, Inc. | Filter for a wet/dry vacuum cleaner for wet material collection |
| US5664285A (en) | 1996-01-11 | 1997-09-09 | Black & Decker Inc. | Vacuum cleaner with combined filter element and collection unit |
| US5699586A (en) | 1996-01-11 | 1997-12-23 | Black & Decker Inc. | Vacuum cleaner with improved suction inlet |
| US5681363A (en) | 1996-03-18 | 1997-10-28 | Tucker; Deborah R. | Vacuum cleaner filter shaker |
| US5733351A (en) | 1996-08-12 | 1998-03-31 | Emerson Electric Co. | Two stage vacuum cleaner filter |
| USD389963S (en) | 1996-08-19 | 1998-01-27 | W. L. Gore & Associates, Inc. | Filter for a wet/dry vacuum apparatus |
| US5795358A (en) | 1996-08-19 | 1998-08-18 | W. L. Gore & Associates, Inc. | Removeable deflector boot for a wet/dry vacuum cleaner |
| GB9624982D0 (en) | 1996-11-30 | 1997-01-15 | Black & Decker Inc | Hand-held vacuum cleaner |
| DE19704468A1 (en) * | 1997-02-06 | 1998-08-13 | Michael Becher | Self=cleaning fine particle filter for vacuum cleaner(s) |
| USD398425S (en) | 1997-03-25 | 1998-09-15 | Dervin International Pty, Ltd. | Combined hand-held vacuum cleaner and charger stand |
| DE19733680B4 (en) | 1997-08-04 | 2012-06-14 | BSH Bosch und Siemens Hausgeräte GmbH | vacuum cleaner |
| US6008628A (en) | 1997-08-20 | 1999-12-28 | Black & Decker Inc. | Method for charging batteries |
| DE19738178C2 (en) | 1997-09-02 | 1999-12-02 | Freudenberg Carl Fa | Filter cartridge and process for its manufacture |
| US6018231A (en) | 1997-10-02 | 2000-01-25 | Black & Decker Inc. | Battery charging system |
| USD403416S (en) | 1997-11-12 | 1998-12-29 | K & N Engineering, Inc. | Air filter with top filtering area and tapered sidewall filtering area |
| US5896024A (en) | 1998-03-24 | 1999-04-20 | Black & Decker, Inc. | Method and apparatus for manually selecting battery charging process |
| US6172487B1 (en) | 1998-06-17 | 2001-01-09 | Black & Decker Inc. | Method and apparatus for charging batteries |
| CA2276821C (en) | 1998-07-09 | 2007-11-27 | Daniele C. Brotto | Method for charging batteries |
| DE29814547U1 (en) | 1998-08-13 | 1998-11-19 | Festo Tooltechnic Gmbh & Co | Cleaning device for a pleated filter in a suction device |
| US6110248A (en) | 1998-08-31 | 2000-08-29 | Shop Vac Corporation | Dual filter assembly for a vacuum cleaner |
| WO2000035331A1 (en) | 1998-12-17 | 2000-06-22 | Koninklijke Philips Electronics N.V. | Vacuum cleaner with detachable dust container |
| JP3530436B2 (en) | 1999-01-29 | 2004-05-24 | 三洋電機株式会社 | Vacuum cleaner dust collector and upright type vacuum cleaner |
| DE19903734A1 (en) | 1999-01-30 | 2000-08-10 | Aeg Hausgeraete Gmbh | Apparatus for cleaning rooms, especially vacuum cleaner has part of legs of separate mesh in region of air outlet with flow surface offering very low flow resistance |
| US6160447A (en) | 1999-02-10 | 2000-12-12 | Adc Solitra, Inc. | Amplifier having redundancies |
| US6075341A (en) | 1999-02-17 | 2000-06-13 | Black & Decker Inc. | Power pack charging system for a power tool |
| DE19925277C2 (en) | 1999-06-02 | 2002-06-20 | Sartorius Gmbh | Transport device for a scale |
| GB9916759D0 (en) | 1999-07-17 | 1999-09-15 | Black & Decker Inc | Improvements in vacuum cleaners |
| USD441926S1 (en) | 1999-08-10 | 2001-05-08 | Black & Decker, Inc. | Hand held vacuum |
| USD433004S (en) | 1999-09-01 | 2000-10-31 | Dynamic Voice, L.L.C. | Dictation apparatus |
| USD435707S (en) | 1999-09-07 | 2000-12-26 | Amptek Company Limited | Vacuum cleaner |
| GB9926009D0 (en) | 1999-11-04 | 2000-01-12 | Vax Ltd | Dust filter |
| US6484350B2 (en) | 1999-12-08 | 2002-11-26 | Shell Electric Mfg. (Holdings) Co. Ltd. | Bagless canister vacuum cleaner |
| US6269518B1 (en) | 1999-12-08 | 2001-08-07 | Shell Electric Mfg. (Holdings) Co. Ltd. | Bagless vacuum cleaner |
| DE19959513C1 (en) | 1999-12-10 | 2001-07-26 | Bruno Gruber | Electric vacuum cleaner attachment has adapter piece fitted to suction hose and filter device extending in longitudinal direction of suction hose |
| USD448894S1 (en) | 2000-01-31 | 2001-10-02 | John Manufacturing Limited | Rechargeable vacuum cleaner |
| DE60121652T2 (en) | 2000-03-24 | 2007-07-26 | Sharp K.K. | Electric vacuum cleaner |
| EP1161915B1 (en) | 2000-04-18 | 2006-10-04 | Vorwerk & Co. Interholding GmbH | Air flow channel |
| US6434785B1 (en) | 2000-04-19 | 2002-08-20 | Headwaters Research & Development, Inc | Dual filter wet/dry hand-held vacuum cleaner |
| AU754573B2 (en) | 2000-06-16 | 2002-11-21 | Samsung Gwangju Electronics Co., Ltd. | Upright-type vacuum cleaner having a cyclone dust collecting apparatus |
| KR100377015B1 (en) | 2000-08-07 | 2003-03-26 | 삼성광주전자 주식회사 | Cyclone dust-collecting apparatus for Vacuum Cleaner |
| USD456960S1 (en) | 2000-10-13 | 2002-05-07 | Headwaters Research Development, Inc. | Hand-held vacuum cleaner |
| WO2002038025A1 (en) * | 2000-11-13 | 2002-05-16 | Matsushita Electric Corporation Of America | Cyclonic vacuum cleaner with filter and filter sweeper |
| AU147560S (en) | 2000-12-20 | 2002-04-26 | Black & Decker Inc | A charging base unit |
| AU147559S (en) | 2000-12-20 | 2002-04-26 | Black & Decker Inc | A filter for a vacuum cleaner |
| US6598263B2 (en) | 2001-05-09 | 2003-07-29 | The Hoover Company | Vacuum cleaner dirt collecting system with filter cleaning devices |
| US6493903B1 (en) | 2001-05-18 | 2002-12-17 | Quest Industries, Inc. | Hand-held vacuum cleaner with headlamp |
| USD458424S1 (en) | 2001-05-31 | 2002-06-04 | Chung-Ming Chen | Steam cleaner |
| CN2507389Y (en) | 2001-08-22 | 2002-08-28 | 宁波富佳电器有限公司 | Hand-held suction cleaner with inflating (deflating) function |
| KR100437106B1 (en) * | 2002-05-31 | 2004-06-23 | 삼성광주전자 주식회사 | Cyclone-type dust collecting apparatus for vacuum cleaner |
| CN2693166Y (en) * | 2002-10-15 | 2005-04-20 | 松下电器产业株式会社 | Electric dust collector |
| US7712182B2 (en) * | 2003-07-25 | 2010-05-11 | Milwaukee Electric Tool Corporation | Air flow-producing device, such as a vacuum cleaner or a blower |
| US20050081321A1 (en) * | 2003-10-15 | 2005-04-21 | Milligan Michael A. | Hand-held cordless vacuum cleaner |
| USD509930S1 (en) | 2003-10-15 | 2005-09-20 | Black & Decker Inc. | Hand-held cordless vacuum cleaner |
| USD504397S1 (en) | 2004-08-26 | 2005-04-26 | Motorola, Inc. | Charger for a communication device |
| US20060137133A1 (en) * | 2004-12-23 | 2006-06-29 | Yik Chi C | Vacuum cleaner |
| US7673369B2 (en) * | 2005-07-22 | 2010-03-09 | Panasonic Corporation Of North America | Floor cleaning apparatus with filter cleaning system |
| US20070209150A1 (en) * | 2006-03-08 | 2007-09-13 | Gogel Nathan A | Floor cleaning apparatus with filter cleaning system |
| US7908707B2 (en) * | 2006-03-08 | 2011-03-22 | Panasonic Corporation Of North America | Floor cleaning apparatus with filter cleaning system |
| EP2113182B1 (en) * | 2008-05-02 | 2011-07-06 | Black & Decker, Inc. | Vacuum cleaner control system |
-
2006
- 2006-01-27 AT AT06100994T patent/ATE460108T1/en not_active IP Right Cessation
- 2006-01-27 DE DE602006012794T patent/DE602006012794D1/en active Active
- 2006-01-27 EP EP06100994.0A patent/EP1813180B2/en not_active Not-in-force
-
2007
- 2007-01-16 AU AU2007200171A patent/AU2007200171B2/en not_active Ceased
- 2007-01-17 US US11/654,098 patent/US8032984B2/en not_active Expired - Fee Related
- 2007-01-22 CA CA2574750A patent/CA2574750C/en not_active Expired - Fee Related
- 2007-01-23 NZ NZ552763A patent/NZ552763A/en unknown
- 2007-01-29 CN CN2007100082849A patent/CN101006909B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| US20070186372A1 (en) | 2007-08-16 |
| EP1813180A1 (en) | 2007-08-01 |
| CA2574750A1 (en) | 2007-07-27 |
| EP1813180B1 (en) | 2010-03-10 |
| ATE460108T1 (en) | 2010-03-15 |
| US8032984B2 (en) | 2011-10-11 |
| CN101006909A (en) | 2007-08-01 |
| DE602006012794D1 (en) | 2010-04-22 |
| CN101006909B (en) | 2011-02-09 |
| NZ552763A (en) | 2008-04-30 |
| EP1813180B2 (en) | 2013-05-01 |
| AU2007200171A1 (en) | 2007-08-16 |
| AU2007200171B2 (en) | 2011-09-22 |
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Legal Events
| Date | Code | Title | Description |
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| EEER | Examination request | ||
| MKLA | Lapsed |
Effective date: 20200122 |