CA2702516A1 - Improvements in and relating to vacuum cleaners - Google Patents
Improvements in and relating to vacuum cleaners Download PDFInfo
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- CA2702516A1 CA2702516A1 CA 2702516 CA2702516A CA2702516A1 CA 2702516 A1 CA2702516 A1 CA 2702516A1 CA 2702516 CA2702516 CA 2702516 CA 2702516 A CA2702516 A CA 2702516A CA 2702516 A1 CA2702516 A1 CA 2702516A1
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- suction head
- vacuum cleaner
- air
- suction
- cleaner according
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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
- A47L9/02—Nozzles
- A47L9/08—Nozzles with means adapted for blowing
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Nozzles For Electric Vacuum Cleaners (AREA)
Abstract
An attachment for a vacuum cleaner 10 comprises a suction head 12 which includes a suction chamber 14 to create and contain a region of low pressure adjacent to a surface 16 to be cleaned. The suction head 12 includes a number of air bleeds 20 and these may be arranged as a first array first air bleeds 20a and a second row of second air bleeds 20b. Each air bleed 20 is arranged to induce cyclonic airflow as the atmospheric airflows into the suction chamber 14. This cyclonic airflow is directed towards the surface 16 to be cleaned and, in particular, an apex of this cyclonic airflow is arranged to coincide or penetrate the surface 16 to be cleaned. For example, the apex of the cyclonic airflow may locate within the carpet fibers of a carpet in order to disturb and disrupt dust and debris within the carpet. Accordingly, the cyclonic air bleeds 20 agitate the surface to be cleaned whilst also performing the function of a conventional air bleed within a suction head 12 of a vacuum cleaner 10.
Description
IMPROVEMENTS IN AND RELATING TO VACUUM CLEANERS
Field of the Invention The present invention relates to improvements in and relating to vacuum cleaners and, in particular, relates to improvements in and relating to vacuum suction heads for vacuum cleaners. More specifically, the present invention provides improvements relating to the agitation of surfaces to be cleaned and/or the flow of air into a suction head of a vacuum cleaner.
Background Vacuum cleaners include suction heads in order to locate and confine an area of suction adjacent to a surface to be cleaned. The suction head comprises a peripheral surface or peripheral seal in order for the suction head to form a seal against the surface. A system chamber in the suction head then extracts debris and dust from the surface by the suction power generated by the suction generating means of the vacuum cleaner.
If the suction head creates a firm seal with the surface then a user will not be able to manually move the cleaning head across the surface to be cleaned. Accordingly, vacuum cleaning heads require air inflow regions or air bleeds. These air bleeds produce airflow from the external atmosphere into a suction chamber in the suction head. The air then flows from the suction head through a connecting tube or conduit and into a dust collecting chamber of the vacuum cleaner. The air then flows out of the chamber and back into the atmosphere.
The air bleeds on the suction head are necessary but effectively waste suction energy. On carpeted or other irregular surfaces, the air bleeds may naturally occur due to the inability of the peripheral seal of the cleaning head to form an airtight seal with the surface. However, on a smooth hard surface, the cleaning head may readily create a substantially air tight seal and, therefore, air bleeds are required or a non-continuous peripheral surface (for example, a brush seal) may locate around the cleaning head and acts as air bleeds and produce air inflow into the cleaning head which is approximately co-planar with the surface being cleaned.
Vacuum cleaners and, in particular, upright vacuum cleaners generally include an agitator in the cleaning head. The agitator may include a brush bar which comprises a brush mounted on a rotating cylinder such that the brush agitates and releases dirt and debris from the surface and, especially, from a carpeted surface. The cylinder may be powered and rotated either by a dedicated motor, a motor shared with the suction fan of the vacuum cleaner or may be powered by the airflow of the vacuum cleaner. Accordingly, use of an agitator requires power and hence uses energy.
If the brush bar has a dedicated motor then this increases the cost of a vacuum cleaner. Furthermore, this motor may fail and, thereby increases the likelihood of faults occurring with the vacuum cleaner. If the brush bar is powered by the fan motor then this requires a drive transfer mechanism to power the brush bar.
Again, this increases the cost of the vacuum cleaner and also increases the likelihood of faults/problems occurring. Similarly, if the brush bar is powered by the airflow of the vacuum cleaner then this again requires additional apparatus which increases the costs and likelihood of failure. In addition, this also reduces the suction of the power generated in the cleaning head since some of the suction power will be lost due to the energy required to power the brush bar.
The agitation of carpet fibers is highly beneficial in the cleaning effectiveness of a vacuum cleaner due to the effectiveness of the action in releasing dust and debris from the carpet fibers to which they may be adhered.
It is an aim of the present invention to overcome at least one problem associated with the prior art whether referred to herein or otherwise.
Summary According to a first aspect of the present invention there is provided a suction head for a vacuum cleaner, the suction head comprising at least one air bleed wherein the air bleed comprises airflow inducing means in order to create an airflow directed substantially towards the surface to be cleaned.
Preferably the airflow inducing means comprises vortex inducing means.
Field of the Invention The present invention relates to improvements in and relating to vacuum cleaners and, in particular, relates to improvements in and relating to vacuum suction heads for vacuum cleaners. More specifically, the present invention provides improvements relating to the agitation of surfaces to be cleaned and/or the flow of air into a suction head of a vacuum cleaner.
Background Vacuum cleaners include suction heads in order to locate and confine an area of suction adjacent to a surface to be cleaned. The suction head comprises a peripheral surface or peripheral seal in order for the suction head to form a seal against the surface. A system chamber in the suction head then extracts debris and dust from the surface by the suction power generated by the suction generating means of the vacuum cleaner.
If the suction head creates a firm seal with the surface then a user will not be able to manually move the cleaning head across the surface to be cleaned. Accordingly, vacuum cleaning heads require air inflow regions or air bleeds. These air bleeds produce airflow from the external atmosphere into a suction chamber in the suction head. The air then flows from the suction head through a connecting tube or conduit and into a dust collecting chamber of the vacuum cleaner. The air then flows out of the chamber and back into the atmosphere.
The air bleeds on the suction head are necessary but effectively waste suction energy. On carpeted or other irregular surfaces, the air bleeds may naturally occur due to the inability of the peripheral seal of the cleaning head to form an airtight seal with the surface. However, on a smooth hard surface, the cleaning head may readily create a substantially air tight seal and, therefore, air bleeds are required or a non-continuous peripheral surface (for example, a brush seal) may locate around the cleaning head and acts as air bleeds and produce air inflow into the cleaning head which is approximately co-planar with the surface being cleaned.
Vacuum cleaners and, in particular, upright vacuum cleaners generally include an agitator in the cleaning head. The agitator may include a brush bar which comprises a brush mounted on a rotating cylinder such that the brush agitates and releases dirt and debris from the surface and, especially, from a carpeted surface. The cylinder may be powered and rotated either by a dedicated motor, a motor shared with the suction fan of the vacuum cleaner or may be powered by the airflow of the vacuum cleaner. Accordingly, use of an agitator requires power and hence uses energy.
If the brush bar has a dedicated motor then this increases the cost of a vacuum cleaner. Furthermore, this motor may fail and, thereby increases the likelihood of faults occurring with the vacuum cleaner. If the brush bar is powered by the fan motor then this requires a drive transfer mechanism to power the brush bar.
Again, this increases the cost of the vacuum cleaner and also increases the likelihood of faults/problems occurring. Similarly, if the brush bar is powered by the airflow of the vacuum cleaner then this again requires additional apparatus which increases the costs and likelihood of failure. In addition, this also reduces the suction of the power generated in the cleaning head since some of the suction power will be lost due to the energy required to power the brush bar.
The agitation of carpet fibers is highly beneficial in the cleaning effectiveness of a vacuum cleaner due to the effectiveness of the action in releasing dust and debris from the carpet fibers to which they may be adhered.
It is an aim of the present invention to overcome at least one problem associated with the prior art whether referred to herein or otherwise.
Summary According to a first aspect of the present invention there is provided a suction head for a vacuum cleaner, the suction head comprising at least one air bleed wherein the air bleed comprises airflow inducing means in order to create an airflow directed substantially towards the surface to be cleaned.
Preferably the airflow inducing means comprises vortex inducing means.
2 The axis of the vortex may form an angle with the surface to be cleaned in which the angle may be greater than 0 and preferably greater than 45 and more preferably greater that 800.
Preferably, in use, the axis of the vortex is substantially perpendicular to the surface to be cleaned.
A central longitudinal axis of the airflow may form an angle with the surface to be cleaned in which the angle may be greater than 0 and preferably is greater than 45 and more preferably is greater than 80 .
Preferably, in use, a central longitudinal axis of the airflow is substantially perpendicular to the surface to be cleaned.
Preferably the suction head comprises a plurality of air bleeds. Preferably each air bleed incorporates respective airflow inducing means and more preferably vortex inducing means. The suction head may also comprise auxiliary air bleeds which are of a different configuration to the plurality of air bleeds. For example, the auxiliary air bleeds may be linear air bleeds and may be located around sides of the suction head and may provide substantially planar airflow with the surface to be cleaned.
Preferably, in use, the axes of the vortices are each perpendicular to the surface to be cleaned.
Preferably the airflow (and preferably vortex) inducing means comprises a substantially frusto-conical shaped surface. Preferably the frusto-conical shaped surface is tapered downwardly.
The airflow inducing means may be substantially tubular.
Preferably an upper cross-section of the frusto-conical shaped surface is substantially circular having a radius which is greater than the radius of the frusto-conical shaped surface at a lower cross-section. Preferably the radius of the circular cross-section of the frusto-conical shaped surface reduces (and preferably reduces at a uniform rate) downwardly from an upper end to a lower end.
Preferably the vortex inducing means (or airflow inducing means) comprises an air inlet and air outlet.
Preferably the air inlet is arranged to induce vortex airflow within the vortex inducing means (or airflow inducing means).
Preferably, in use, the axis of the vortex is substantially perpendicular to the surface to be cleaned.
A central longitudinal axis of the airflow may form an angle with the surface to be cleaned in which the angle may be greater than 0 and preferably is greater than 45 and more preferably is greater than 80 .
Preferably, in use, a central longitudinal axis of the airflow is substantially perpendicular to the surface to be cleaned.
Preferably the suction head comprises a plurality of air bleeds. Preferably each air bleed incorporates respective airflow inducing means and more preferably vortex inducing means. The suction head may also comprise auxiliary air bleeds which are of a different configuration to the plurality of air bleeds. For example, the auxiliary air bleeds may be linear air bleeds and may be located around sides of the suction head and may provide substantially planar airflow with the surface to be cleaned.
Preferably, in use, the axes of the vortices are each perpendicular to the surface to be cleaned.
Preferably the airflow (and preferably vortex) inducing means comprises a substantially frusto-conical shaped surface. Preferably the frusto-conical shaped surface is tapered downwardly.
The airflow inducing means may be substantially tubular.
Preferably an upper cross-section of the frusto-conical shaped surface is substantially circular having a radius which is greater than the radius of the frusto-conical shaped surface at a lower cross-section. Preferably the radius of the circular cross-section of the frusto-conical shaped surface reduces (and preferably reduces at a uniform rate) downwardly from an upper end to a lower end.
Preferably the vortex inducing means (or airflow inducing means) comprises an air inlet and air outlet.
Preferably the air inlet is arranged to induce vortex airflow within the vortex inducing means (or airflow inducing means).
3 Preferably the air inlet is arranged to direct the air inflow around a frusto-conical shaped surface of the vortex inducing means (or airflow inducing means).
Preferably the air inlet is arranged substantially tangentially relative to the frusto-conical shaped surface in order to direct the air substantially tangentially with the respect to the frusto-conical shaped surface.
Preferably the air outlet is arranged substantially centrally in the vortex inducing means (or airflow inducing means) and preferably directs the air generally outwardly from the vortex inducing means (or airflow inducing means).
Preferably the suction head comprises an array of air bleeds.
Preferably the array of air bleeds is arranged such that the air inlets of the air bleeds are located on an upper surface of the suction head.
Preferably the air outlets of the air bleeds direct the air into a suction chamber within the suction head. The suction chamber may be defined by an upper wall and a peripheral wall which provides an open face for locating adjacent to a surface to be cleaned.
The air outlets of the air bleeds may be located on the upper wall of the suction chamber.
The air outlets of the air bleeds may comprise a projecting portion which projects downwardly into the suction chamber relative to the upper wall of the suction chamber. Alternatively, the air outlets of the air bleeds may be substantially flush with the upper wall of the suction chamber.
Preferably, the vortex inducing means (or airflow inducing means) is arranged to produce a vortex (or airflow) directed towards an apex. Preferably, in use, the apex is arranged to be located at the surface to be cleaned. For example, the apex may be arranged to locate within the carpet fibres of the carpet being cleaned and/or, for example, the apex may be arranged to locate on or adjacent to a hard surface being cleaned.
The air bleeds may be arranged substantially linearly across the width of the suction head. The suction head may comprise a first array or line of air bleeds and a second array or line of air bleeds. The air bleeds in the second array or line may be laterally offset from the air bleeds in the first array or line.
Preferably the air inlet is arranged substantially tangentially relative to the frusto-conical shaped surface in order to direct the air substantially tangentially with the respect to the frusto-conical shaped surface.
Preferably the air outlet is arranged substantially centrally in the vortex inducing means (or airflow inducing means) and preferably directs the air generally outwardly from the vortex inducing means (or airflow inducing means).
Preferably the suction head comprises an array of air bleeds.
Preferably the array of air bleeds is arranged such that the air inlets of the air bleeds are located on an upper surface of the suction head.
Preferably the air outlets of the air bleeds direct the air into a suction chamber within the suction head. The suction chamber may be defined by an upper wall and a peripheral wall which provides an open face for locating adjacent to a surface to be cleaned.
The air outlets of the air bleeds may be located on the upper wall of the suction chamber.
The air outlets of the air bleeds may comprise a projecting portion which projects downwardly into the suction chamber relative to the upper wall of the suction chamber. Alternatively, the air outlets of the air bleeds may be substantially flush with the upper wall of the suction chamber.
Preferably, the vortex inducing means (or airflow inducing means) is arranged to produce a vortex (or airflow) directed towards an apex. Preferably, in use, the apex is arranged to be located at the surface to be cleaned. For example, the apex may be arranged to locate within the carpet fibres of the carpet being cleaned and/or, for example, the apex may be arranged to locate on or adjacent to a hard surface being cleaned.
The air bleeds may be arranged substantially linearly across the width of the suction head. The suction head may comprise a first array or line of air bleeds and a second array or line of air bleeds. The air bleeds in the second array or line may be laterally offset from the air bleeds in the first array or line.
4 The suction head may comprise less than or equal to twenty arrays or lines of air bleeds.
Each array or line of air bleeds may comprise less than or equal to twenty air bleeds and may comprise less than or equal to ten air bleeds.
The upper wall of the suction chamber may be planar and may be arranged, in use, to be co-planar with the surface to be cleaned.
The upper wall of the suction chamber may be angled and, in particular, may comprise a first section that is angled downwardly from a central location to a first lateral side of the suction head and a second section that is angled downwardly from a central location to a second lateral side of the suction head.
The suction head may comprise a peripheral sealing member which may be selectively operable. For example, when cleaning a carpeted surface or the like, the peripheral sealing member may not be required and may be moved to a non-operating position and whilst cleaning a hard surface or the like the peripheral sealing may be required and may be moved to an operating position. Preferably, the peripheral sealing member comprises a brush member.
The air bleed may comprise fluid introducing means in order to introduce a fluid into the airflow.
The fluid may comprise a liquid. The liquid may comprise a perfumed liquid and/or an antibacterial solution and/or a cleaning solution. Preferably the liquid is introduced into the airflow as liquid droplets. The liquid may be introduced into the airflow as an atomised liquid.
The fluid may comprise a powder. The powder may comprise a perfumed powder and/or an antibacterial powder. The powder may be introduced into the air flow as particles.
Preferably the fluid introducing means comprises a fluid inlet. The fluid inlet may be arranged substantially tangentially relative to the frusto-conical shaped surface.
Preferably the fluid is drawn into the air bleed by the airflow and preferably the cyclonic airflow in the air bleed.
Each array or line of air bleeds may comprise less than or equal to twenty air bleeds and may comprise less than or equal to ten air bleeds.
The upper wall of the suction chamber may be planar and may be arranged, in use, to be co-planar with the surface to be cleaned.
The upper wall of the suction chamber may be angled and, in particular, may comprise a first section that is angled downwardly from a central location to a first lateral side of the suction head and a second section that is angled downwardly from a central location to a second lateral side of the suction head.
The suction head may comprise a peripheral sealing member which may be selectively operable. For example, when cleaning a carpeted surface or the like, the peripheral sealing member may not be required and may be moved to a non-operating position and whilst cleaning a hard surface or the like the peripheral sealing may be required and may be moved to an operating position. Preferably, the peripheral sealing member comprises a brush member.
The air bleed may comprise fluid introducing means in order to introduce a fluid into the airflow.
The fluid may comprise a liquid. The liquid may comprise a perfumed liquid and/or an antibacterial solution and/or a cleaning solution. Preferably the liquid is introduced into the airflow as liquid droplets. The liquid may be introduced into the airflow as an atomised liquid.
The fluid may comprise a powder. The powder may comprise a perfumed powder and/or an antibacterial powder. The powder may be introduced into the air flow as particles.
Preferably the fluid introducing means comprises a fluid inlet. The fluid inlet may be arranged substantially tangentially relative to the frusto-conical shaped surface.
Preferably the fluid is drawn into the air bleed by the airflow and preferably the cyclonic airflow in the air bleed.
5 The airflow inducing means may comprise a substantially tubular surface (for example, a cylindrical section) which may have a uniform cross-section. The airflow inducing means may induce substantially linear airflow.
According to a second aspect of the present invention there is provided a vacuum cleaner comprising a suction head wherein the suction head comprises at least one air bleed comprising airflow inducing means in order to create an airflow directed substantially towards the surface to be cleaned.
The airflow inducing means may comprise vortex inducing means.
The vacuum cleaner may comprise a cylinder type vacuum cleaner.
The vacuum cleaner may comprise an upright type vacuum cleaner.
The vacuum cleaner may comprise a hand held vacuum cleaner.
According to a third aspect of the present invention there is provided a method of agitating a surface to be cleaned comprising providing a suction head including a suction chamber having an open face to be located adjacent to a surface to be cleaned the method comprising forming an airflow directed substantially towards the surface to be cleaned.
The method may comprise forming an airflow directed substantially towards the surface to be cleaned.
The method may comprise forming a plurality of airflows (or vortex airflows) directed substantially towards the surface to be cleaned.
According to a fourth aspect of the present invention there is provided a suction head for a vacuum cleaner, the suction head comprising at least one air bleed wherein the air bleed comprises an air inlet and fluid introducing means wherein the fluid introducing means is arranged to introduce a fluid into the airflow within the air bleed.
Preferably the airflow comprises a substantially cyclonic airflow.
The airflow may be substantially generally linear.
Brief Description of the Drawings
According to a second aspect of the present invention there is provided a vacuum cleaner comprising a suction head wherein the suction head comprises at least one air bleed comprising airflow inducing means in order to create an airflow directed substantially towards the surface to be cleaned.
The airflow inducing means may comprise vortex inducing means.
The vacuum cleaner may comprise a cylinder type vacuum cleaner.
The vacuum cleaner may comprise an upright type vacuum cleaner.
The vacuum cleaner may comprise a hand held vacuum cleaner.
According to a third aspect of the present invention there is provided a method of agitating a surface to be cleaned comprising providing a suction head including a suction chamber having an open face to be located adjacent to a surface to be cleaned the method comprising forming an airflow directed substantially towards the surface to be cleaned.
The method may comprise forming an airflow directed substantially towards the surface to be cleaned.
The method may comprise forming a plurality of airflows (or vortex airflows) directed substantially towards the surface to be cleaned.
According to a fourth aspect of the present invention there is provided a suction head for a vacuum cleaner, the suction head comprising at least one air bleed wherein the air bleed comprises an air inlet and fluid introducing means wherein the fluid introducing means is arranged to introduce a fluid into the airflow within the air bleed.
Preferably the airflow comprises a substantially cyclonic airflow.
The airflow may be substantially generally linear.
Brief Description of the Drawings
6 For a better understanding of the invention and to show how the same may be carried into effect, there will now be described by way of example only, specific embodiments, methods and processes according to the present invention with reference to the accompanying drawings in which:
Figure 1 is a cross section of a preferred embodiment of a suction head for a vacuum cleaner.
Figure 2 is a bottom view of a preferred embodiment of a suction head for a vacuum cleaner.
Figure 3 is another side cross section of a preferred embodiment of a suction head for a vacuum cleaner.
Figure 4 is a partially cut away view of a preferred embodiment of a suction head for a vacuum cleaner.
Figure 5 is a front cross section of a preferred embodiment of a suction head for a vacuum cleaner.
Figure 6 is a front cross section of part of a preferred embodiment of a suction head for a vacuum cleaner.
Figure 7 is a perspective view of a preferred embodiment of a part of an array of air bleeds for use in a preferred embodiment of a suction head for a vacuum cleaner.
Figure 8 is a front view of an embodiment of an array of air bleeds for use in a suction head of a vacuum cleaner.
Figure 9 is a plan view of an embodiment of an array of air bleeds of a preferred embodiment of a suction head for a vacuum cleaner.
Figure 10 is a partially cut away view of a preferred embodiment of a suction head for a vacuum cleaner.
Figure 11 a is a perspective view of vortex inducing means of a preferred embodiment of an air bleed.
Figure 11 b is a plan view of vortex inducing means of a preferred embodiment of an air bleed.
Figure 11 c is a side schematic view of vortex inducing means of a preferred embodiment of an air bleed.
Figure 1 is a cross section of a preferred embodiment of a suction head for a vacuum cleaner.
Figure 2 is a bottom view of a preferred embodiment of a suction head for a vacuum cleaner.
Figure 3 is another side cross section of a preferred embodiment of a suction head for a vacuum cleaner.
Figure 4 is a partially cut away view of a preferred embodiment of a suction head for a vacuum cleaner.
Figure 5 is a front cross section of a preferred embodiment of a suction head for a vacuum cleaner.
Figure 6 is a front cross section of part of a preferred embodiment of a suction head for a vacuum cleaner.
Figure 7 is a perspective view of a preferred embodiment of a part of an array of air bleeds for use in a preferred embodiment of a suction head for a vacuum cleaner.
Figure 8 is a front view of an embodiment of an array of air bleeds for use in a suction head of a vacuum cleaner.
Figure 9 is a plan view of an embodiment of an array of air bleeds of a preferred embodiment of a suction head for a vacuum cleaner.
Figure 10 is a partially cut away view of a preferred embodiment of a suction head for a vacuum cleaner.
Figure 11 a is a perspective view of vortex inducing means of a preferred embodiment of an air bleed.
Figure 11 b is a plan view of vortex inducing means of a preferred embodiment of an air bleed.
Figure 11 c is a side schematic view of vortex inducing means of a preferred embodiment of an air bleed.
7 Figure 12 is a bottom view of a second embodiment of a suction head for a vacuum cleaner.
Figure 13 is a partially cut away plan view of a second embodiment of suction head for a vacuum cleaner.
Figure 14 is a partially cut away front view of a second embodiment of a suction head for a vacuum cleaner.
Figure 15 is a side cross-section of a second embodiment of a suction head for a vacuum cleaner.
Figure 16a is a partially cut away plan view of a third embodiment of a suction head for a vacuum cleaner.
Figure 16b is a bottom view of a third embodiment of a suction head for a vacuum cleaner.
Figure 16c is a partially cut away front view of a third embodiment of a suction head for a vacuum cleaner.
Figure 16d is a side cross-section of a third embodiment of a suction head for a vacuum cleaner.
Figure 17a is a partially cut away plan view of a fourth embodiment of a suction head for a vacuum cleaner.
Figure 17b is a bottom view of a fourth embodiment of a suction head for a vacuum cleaner.
Figure 17c is a partially cut away front view of a fourth embodiment of a suction head for a vacuum cleaner.
Figure 17d is a side cross-section of a fourth embodiment of a suction head for a vacuum cleaner.
Figure 18a is a partially cut away plan view of a fifth embodiment of a suction head for a vacuum cleaner.
Figure 18b is a bottom view of a fifth embodiment of a suction head for a vacuum cleaner.
Figure 13 is a partially cut away plan view of a second embodiment of suction head for a vacuum cleaner.
Figure 14 is a partially cut away front view of a second embodiment of a suction head for a vacuum cleaner.
Figure 15 is a side cross-section of a second embodiment of a suction head for a vacuum cleaner.
Figure 16a is a partially cut away plan view of a third embodiment of a suction head for a vacuum cleaner.
Figure 16b is a bottom view of a third embodiment of a suction head for a vacuum cleaner.
Figure 16c is a partially cut away front view of a third embodiment of a suction head for a vacuum cleaner.
Figure 16d is a side cross-section of a third embodiment of a suction head for a vacuum cleaner.
Figure 17a is a partially cut away plan view of a fourth embodiment of a suction head for a vacuum cleaner.
Figure 17b is a bottom view of a fourth embodiment of a suction head for a vacuum cleaner.
Figure 17c is a partially cut away front view of a fourth embodiment of a suction head for a vacuum cleaner.
Figure 17d is a side cross-section of a fourth embodiment of a suction head for a vacuum cleaner.
Figure 18a is a partially cut away plan view of a fifth embodiment of a suction head for a vacuum cleaner.
Figure 18b is a bottom view of a fifth embodiment of a suction head for a vacuum cleaner.
8 Figure 18c is a partially cut away front view of a fifth embodiment of a suction head for a vacuum cleaner.
Figure 18d is a side cross-section of a fifth embodiment of a suction head for a vacuum cleaner.
Figure 19a is a partially cut away plan view of a sixth embodiment of a suction head for a vacuum cleaner.
Figure 19b is a bottom view of a sixth embodiment of a suction head for a vacuum cleaner.
Figure 19c is a partially cut away front view of a sixth embodiment of a suction head for a vacuum cleaner.
Figure 19d is a side cross-section of a sixth embodiment of a suction head for a vacuum cleaner.
Figure 20a is a partially cut away plan view of a seventh embodiment of a suction head for a vacuum cleaner.
Figure 20b is a bottom view of a seventh embodiment of suction head for a vacuum cleaner.
Figure 20c is a partially cut away front view of a seventh embodiment of a suction head for a vacuum cleaner.
Figure 20d is a side cross-section of a seventh embodiment of a suction head for a vacuum cleaner.
Figure 21 a is a partially cut away plan view of an eighth embodiment of a suction head for a vacuum cleaner.
Figure 21 b is a bottom view of an eighth embodiment of a suction head for a vacuum cleaner.
Figure 21 c is a partially cut away front view of an eighth embodiment of a suction head for a vacuum cleaner.
Figure 21 d is a side cross-section of an eighth embodiment of a suction head for a vacuum cleaner.
Figure 18d is a side cross-section of a fifth embodiment of a suction head for a vacuum cleaner.
Figure 19a is a partially cut away plan view of a sixth embodiment of a suction head for a vacuum cleaner.
Figure 19b is a bottom view of a sixth embodiment of a suction head for a vacuum cleaner.
Figure 19c is a partially cut away front view of a sixth embodiment of a suction head for a vacuum cleaner.
Figure 19d is a side cross-section of a sixth embodiment of a suction head for a vacuum cleaner.
Figure 20a is a partially cut away plan view of a seventh embodiment of a suction head for a vacuum cleaner.
Figure 20b is a bottom view of a seventh embodiment of suction head for a vacuum cleaner.
Figure 20c is a partially cut away front view of a seventh embodiment of a suction head for a vacuum cleaner.
Figure 20d is a side cross-section of a seventh embodiment of a suction head for a vacuum cleaner.
Figure 21 a is a partially cut away plan view of an eighth embodiment of a suction head for a vacuum cleaner.
Figure 21 b is a bottom view of an eighth embodiment of a suction head for a vacuum cleaner.
Figure 21 c is a partially cut away front view of an eighth embodiment of a suction head for a vacuum cleaner.
Figure 21 d is a side cross-section of an eighth embodiment of a suction head for a vacuum cleaner.
9 Figure 22a is partially cut away plan view of a ninth embodiment of a suction head of a vacuum cleaner.
Figure 22b is a bottom view of a ninth embodiment of a suction head for a vacuum cleaner.
Figure 22c is a partially cut away front view of a ninth embodiment of a suction head for a vacuum cleaner.
Figure 22d is a side cross-section of a ninth embodiment of a suction head for a vacuum cleaner.
Figure 23a is a partially cut away plan view of a tenth embodiment of a suction head for a vacuum cleaner.
Figure 23b is a bottom view of a tenth embodiment of a suction head for a vacuum cleaner.
Figure 23c is a partially cut away front view of a tenth embodiment of a suction head for a vacuum cleaner.
Figure 23d is a side cross-section of a tenth embodiment of a suction head for a vacuum cleaner.
Figure 24a is a partially cut away plan view of an eleventh embodiment of a suction head for a vacuum cleaner.
Figure 24b is a bottom view of an eleventh embodiment of a suction head for a vacuum cleaner.
Figure 24c is a partially cut away front view of an eleventh embodiment of a suction head for a vacuum cleaner.
Figure 24d is a side cross-section of an eleventh embodiment of a suction head for a vacuum cleaner.
Figure 25 is a perspective view of another embodiment of vortex inducing means for use in an air bleed of a suction head for a vacuum cleaner.
Figure 26a is a plan view of a further embodiment of vortex inducing means including powder introducing means for use in an air bleed of a suction head for a vacuum cleaner.
Figure 26b is a side schematic view of a further embodiment of vortex inducing means including powder introducing means for use in an air bleed of a suction head for a vacuum cleaner.
Figure 27a is a plan view of a yet further embodiment of vortex inducing means including fluid introducing means for use in an air bleed of a suction head for a vacuum cleaner.
Figure 27b is a side schematic view of a yet further embodiment of vortex inducing means including fluid introducing means for use in an air bleed of a suction for a vacuum cleaner.
Figure 28a is a bottom view of a suction head in accordance with the present teaching.
Figure 28b is a top view of the suction head of Figure 28a.
Figure 28c is a cross-section through the suction head of Figure 28a.
Description of the preferred embodiment There will now be described by way of example a specific mode contemplated by the inventors. In the following description numerous specific details are set forth in order to provide a thorough understanding. It will be apparent however, to one skilled in the art, that the present invention may be practiced without limitation to these specific details. In other instances, well known methods and structures have not been described in detail so as not to unnecessarily obscure the description.
As shown in figures 1 to 4, an attachment for a vacuum cleaner 10 comprises a cleaning head or suction head 12 which includes a suction chamber 14 to create and contain a region of relatively low pressure adjacent to a surface 16 to be cleaned. As previously explained, the suction head 12 includes a peripheral member 18 which is arranged to locate against the surface 16. The peripheral member 18 is required to provide an effective suction chamber 14. However, on certain surfaces, a peripheral member 18 may form a very effective seal which prevents the suction head 12 from being manually moved over the surface 16. Accordingly, air inlet means (air bleeds 20) are required for the suction head 12. In the embodiment shown in figures 1 to 4, the suction head 12 includes side bleeds 19 which allow some air to enter into the suction chamber 14. This air flows substantially co-planar with the surface 16 to be cleaned. The suction head 12 induces a brush blade holder 50 which is arranged to retain a brush blade to aid the cleaning of the surface 16 and to help disturb and remove dust and debris. The suction head also includes rear wheels 52 and front wheels 54 to enable the suction head 12 to easily travel over a surface. In the preferred embodiment, the air inlet means comprise air bleeds 20 which produce a cyclonic airflow 28 as the atmospheric air passes through the air bleeds 20 into the suction head 12. This cyclonic airflow 27 is arranged to be directed towards the surface 16 to be cleaned and is arranged to travel (or penetrate) into the surface 16 to be cleaned. This cyclonic airflow is arranged to agitate the surface 16 to be cleaned and to, thereby, increase the efficiency of the vacuum cleaner 10. In an alternative embodiment, the air bleeds comprise airflow inducing means which may enable substantially generally linear airflow through the suction head 12 into the suction chamber 14. For example, the air bleeds 20 may comprise tubular portions which induce the substantially linear airflow into the suction chamber 14.
As shown in figure 11 a, figure 11 b and figure 11 c, in the preferred embodiment the airflow creates a cyclone directed towards an apex 30 wherein the apex 30 is arranged to be located below the level of the upper level of the surface 16 being cleaned. For example, the apex 30 of the cyclonic airflow 28 is arranged to locate within the fibers of a carpet such that the cyclonic airflow 28 agitates the fibers of the carpet and is arranged to disturb and disrupt dirt, debris and dust within the carpet.
Accordingly, the cyclonic bleeds 20 form the dual function of providing the essential air bleeds for the suction head 12 whilst also providing the function of a surface agitator.
The suction head 12 includes a plurality of cyclonic air bleeds 20, as shown in figures 5 to 10.
The cyclonic air bleeds 20 are arranged in at least one array and in the preferred embodiment the suction head 12 comprises two linear arrays of cyclonic air bleeds 20. The suction head 12 comprises a first linear array of first cyclonic air bleeds 20a which extends across the width of the suction head 12 and a second linear array of second cyclonic air bleeds 20b which extends across the width of the suction head 12. The second array is arranged to be located behind the first array. The second cyclonic air bleeds 22a in the second array are linearly offset from the first cyclonic air bleeds located in the first array, as shown in figure 2 and figure 4. This offset configuration increases the surface area which is subjected to agitation by the cyclones 28 created by the cyclonic air bleeds 20, for example, a suction head 12 is generally moved forwards and backwards and since the cyclones are offset then this reduces the likelihood of an area of the surface 16 not being subjected to direct agitation.
The arrays of cyclonic bleeds 20 may be arranged around the central connecting conduit 34 as shown in figure 10. Alternatively the first array of first cyclonic air bleeds 20a may be continuous whilst the second array of second cyclonic air bleed 20b may be arranged either side of the conduit 34, as shown in figure 4. Each cyclonic air bleed 20 comprises a chamber 22 including a frusto-conical surface 24 and has a tangential air inlet 26, as shown in figure 11 a, figure 11 b and 11 c. Each cyclonic air bleed 20 includes an outlet 27 which is located centrally at the lower end and directs the air flow outwardly into the suction chamber 14. In use, air enters through the tangential air inlet 20 and is drawn through the air bleed 20 by travelling around the frusto-conical surface 24 in a generally spiral or helical pattern 28 as shown in figure 11 c. Accordingly, the air flows downwardly in a helical manner with a decreasing diameter such that the airflow accelerates and travels towards an apex 30 (shown schematically in figure 11c). The air at the apex 30 is arranged to disturb and disrupt the carpet fibers in order to disturb and release dust and debris and the air then travels through the suction chamber 14 and through an outlet 32 whilst also carrying the dust and debris. As with conventional vacuum cleaners, the airflow including the dust and debris then travels through a conduit 34 and into a dust collecting chamber where the dust and debris is collected. The dust collecting chamber may comprise a conventional system or may comprise a cyclonic system.
Once the dust and debris has been deposited or at least a significant portion thereof, the air then flows back to the external atmosphere.
The suction chamber 14 is defined by an upper wall 36 and at least one peripheral wall 38. The outlets 27 of the cyclonic air bleeds 20 are located on the upper wall 36.
In the preferred embodiment, as shown in figure 2, the suction chamber 14 comprise a generally "H" shape such that the first array of cyclonic air bleeds 20a are located in a first linear section of the suction chamber 14 and the second array of cyclonic air bleeds 20b are located in a second linear section of the suction chamber and the two sections are connected centrally where the outlet 32 to the conduit 34 is located.
This reduces the surface area of the effective suction chamber 14 and thereby relatively increases the suction power. As shown in figure 5, the upper wall 36 of the suction chamber 14 is planar and is arranged, in use, to be co-planar with the surface 16 being cleaned. In addition, the suction chamber 14 may also incorporate auxiliary air bleeds 19 which are located around the peripheral wall 38 of the suction chamber 14. In the preferred embodiment, as shown in figures 1 to 5, the outlets 27 of the cyclonic air bleeds 20 are arranged to be flush with the upper wall 36 of the suction chamber 14.
The suction head 12 incorporates two main air paths which both share a central aperture 32 for suction. On each air path there are a series of vortex cones which terminate within the air path. In between each air path there is a brush to further help with the floor surface agitation. The floor head also has side bleeds 19 to help with wall/side pick-up. The suction floor head also incorporates a flexible hose linking the main aperture 32 and the pivoting arm. This allows flexibility and improved sealing of the air path. The main conduit for the vacuum cleaner is connected to a suction head 12 by a telescopic tube clip 56 and the suction head 12 includes a pivoting arm 58 and a pivoting joint 60. The suction head 12 comprises and is constructed from a top clamshell 62 and a bottom clamshell 64.
It can be seen that the present invention provides an improved cleaning head 12 for a vacuum cleaner 10 which includes agitation means which is produced efficiently and without any additional moving parts which could increase the risk of failure. The present invention achieves this advantage whilst also being energy efficient.
It is appreciated that the present invention may be incorporated in a cleaning head having a conventional brush bar agitator such that the action of the cyclonic bleeds 20 will complement the action of the brush bar.
As shown in figures 12 to figure 15, a second embodiment of a suction head 12 for a vacuum cleaner 10 comprises a first array of first cyclonic air bleeds 20a and a second array of second cyclonic air bleeds 20b. The outlets 27 of each cyclonic comprises a projecting portion 70 which projects downwardly from the upper wall 36 of the suction chamber 14. These projecting portions 70 effectively form pips and in this embodiment the pips are teardrop shaped with the apex 71 of the teardrop being located towards the outlet 32. This tear drop shape helps to improve the aerodynamics of the suction head 12 and prevents or inhibits any debris being built up and collected on the dead air side of the pips. This also allows the vortex to terminate closer to the floor surface 16 and therefore creates greater agitation.
Figure 16a to figure 16d shows a third embodiment of a suction head 12 for a vacuum cleaner. The outlets 27 of the cyclonic air bleeds 20a, 20b are located on a raised bar portion 74 which extends downwardly from the upper wall 36 of the suction chamber 14. The aim of the bar 74 is to prevent build up of debris and to create a clean air path within the suction chamber 14.
A fourth embodiment of a suction head 12 for a vacuum cleaner 10 is shown in figure 17a to figure 17d. In this embodiment, the suction head 12 comprises a first array of first cyclonic air bleeds 20a which are directed and angled rearwardly on the suction head 12. In addition, the suction head 12 comprises a second array of second cyclonic air bleeds 20b which are directed forwardly and angled downwardly on the suction head 12. This angled design provides a single linear arrangement of the apexes of the cyclonic air bleeds 20a, 20b in both the arrays and, thereby, aims to provide an even agitation of the surface to be cleaned.
A fifth embodiment of a suction head 12 for a vacuum cleaner 10 is shown in figure 18a to figure 18b. In this embodiment, the cyclonic air bleeds 20 have projecting portions 76 which extend downwardly from the upper wall 36 of the suction chamber 14. The projection portions 76 or pips are generally circular and enable the vortex to terminate closer to the floor surface 16 and thereby create greater agitation.
A sixth embodiment of the present invention is shown in figure 19a to figure 19d. In this embodiment the outlets 27 of the cyclonic air bleeds 20a, 20b are arranged to be flush with the upper wall 36 of the suction chamber 14. The aim of this arrangement is to prevent obstacles or debris and dirt within the suction chamber 14 wherein such dirt and debris may build up within the suction chamber 14 and reduce the effectiveness of the vacuum cleaner 10.
A seventh embodiment of a suction head 12 for a vacuum cleaner 10 is shown in figure 20a to figure 20d. In this embodiment, the suction head 12 comprises a first array of first cyclonic air bleeds 20a, a second array of second cyclonic air bleeds 20b and also a third array of third cyclonic air bleeds 20c. The third array of cyclonic air bleeds 20c is located in between the first array of cyclonic air bleeds 20a and the second array of a second cyclonic air bleed 20b. In addition, the first array of first cyclonic air bleeds 20a are generally angled rearwardly such that the apexes of the cyclones created by the first cyclonic air bleeds 20a generally coincide with the apexes of the cyclone as created by the third array of third cyclonic air bleeds 20c.
Similarly, the second cyclonic air bleeds 20b in the second array are angled downwardly and forwardly such that the apexes of the cyclones created in the second cyclonic air bleeds 20b coincide with the apexes of the cyclones created by both the first cyclonic air bleeds 20a and the third cyclonic air bleeds 20c.
It can be seen that all of the cyclonic air bleeds 20a, 20b, 20c are laterally offset along the suction head in order to provide a comprehensive linear arrangement of apexes to agitate the surface to be cleaned.
An eighth embodiment of the present invention is shown in figure 21a to figure 21d.
In this embodiment, the upper walls 36 of the suction head 14 is angled downwardly from the central position. In particular, the upper wall of the suction chamber 14 comprises a first lateral section 76 which extends downwardly from the central outlet 32 to a first lateral side and a second lateral section 78 extends downwardly from the central outlet 32 to a second lateral side. In this embodiment, the cyclonic air bleed comprise circular pips which project downwardly from the upper wall 36. In particular, as the pips located further away from the central outlet 32, the projecting 20 distance decreases until the outlets 27 of the cyclonic air bleeds 20a, 20b located at the lateral side of the suction head 12 are flush with the upper wall 36 of the suction chamber 14. Accordingly, the vortex terminates inside of the air path with pips supporting the end of the vortex cone. This allows the vortex to terminate closer to the floor surface and therefore creates greater agitation.
A ninth embodiment of a suction head 12 for use with in a vacuum cleaner 10 is shown in figure 22a to figure 22d. As previously described, the upper wall 36 of the suction chamber 14 is angled downwardly from a central location. However, in this embodiment, the cyclonic air bleeds 20a, 20b do not include pips but the outlets 27 of the cyclonic air bleeds 20a, 20b are substantially flush with the two sections 76, 78 of the upper wall 36 of the suction chamber 14. Accordingly, the vortex terminates flush with the air path so that there are no obstacles for debris and dirt to build up against.
A tenth embodiment of a suction head 12 for a vacuum cleaner 10 is shown in figure 23a to figure 23d. In this embodiment, the suction head 12 includes extra linear air bleeds 80 in between the vortexes. In particular, the linear air bleeds 80 include an air inlet 82 where air from the atmosphere is drawn in to the suction chamber 14.
The linear air bleeds 80 comprise air outlets 84 where the air is introduced into the suction chamber 14. These outlets 84 are located between the air outlets 27 for the cyclonic air bleeds 20a, 20b. In this embodiment, the cyclonic air bleeds 20a, 20b include circular pips. In particular, the vortex terminates inside of the air path with pips supporting the end of the vortex cone. This allows the vortex to terminate closer to the floor surface and therefore creates greater agitation. The linear air bleeds 80 incorporated in between the vortex cones also helps with the agitation. In this embodiment, the upper wall of the suction chamber is arranged to be substantially co-planar with the surface 16 to be cleaned.
An eleventh embodiment of a suction head 12 for a vacuum cleaner 10 is shown in figure 24a to figure 24d. In this embodiment, the suction head 12 includes linear air bleeds 80 in order for air to be introduced into the suction chamber 14 to supplement that supplied by the cyclonic air bleeds 20. Each linear air bleed 80 includes an air inlet and an air outlet 84. The air outlets 84 which introduce the air into the suction chamber 14 are located in between adjacent air outlets 27 cyclonic of air bleeds 20a, 20b. In addition, the suction head 12 includes a linear row of linear air bleed outlets 84 located between the first array of first cyclonic air bleeds 20a and the second array of second cyclonic air bleeds 20b. In this embodiment the vortex terminates inside of the air path with pips supporting the end of the vortex cone. This allows the vortex to terminate closer to the floor surface and therefore creates greater agitation.
In addition, the upper wall 36 of the suction chamber 14 is arranged to be substantially co-planar with the surface 16 to be cleaned. In further embodiments of the present invention, the cyclonic air bleeds 20 include fluid introducing means whereby liquids or powders etc can be introduced into the cyclonic airflow path 27 in order to supplement the cleaning function of the suction head 12 as shown in figure 25. As shown in figure 26a and figure 26b, the cyclonic air bleed 20 includes an air inlet 26 and a powder introducing inlet 90. The powder introducing inlet 90 is arranged tangentially with the respect to the frusto-conical surface such that the powder 92 is drawn into the cyclonic airflow 27. The powder inlet 90 is arranged to be located 1800 offset relative to the air inlet 26.
Similarly, the cyclonic air bleed 20 may include a liquid introducing means as shown in figure 27a and figure 27b. As with the powder introducing means, the liquid introducing means includes a liquid inlet 96 whereby a liquid 98 and, in particular, droplets of liquid 98 or an atomised liquid are drawn into the cyclonic airflow 28 within the frusto-conical surface 22 through a liquid inlet 96. There are various methods in which the vortex technology can be utilized in household cleaning.
The aforementioned methods and apparatus can be used to utilize air in helping with surface agitation. The main method involves drawing in air tangentially to the vortex cone. Due to the geometry, the cone air is encouraged to spin around the inside which thereby speeds up the velocity and peaks at the bottom of the cone which then agitates the surface to be cleaned. As mentioned above, there can be means to control the introduction of a powder into a second air duct at the top of the vortex cone. The powder can be perfumed or antibacterial depending on the purpose/application. Similarly, a liquid could be fed into the vortex cone in a controlled manner. The liquid would be carried in the air which would terminate within the carpet fibers. Depending upon the application, the liquid could be perfumed, antibacterial/cleaning solution.
Figures 28a to 28c show a further arrangement of a suction head in accordance with the present teaching. The same reference numerals will be used for similar parts. In this arrangement, in addition to the cyclonic or vortex air bleeds 20, first and second linear air bleeds 2800 are provided at each end of the suction head. Each of the linear air bleeds 2800 have an exit aperture 2800b provided on an upper surface of the suction head and an exit aperture 2900a provided within the suction chamber 14.
In this way an air-bleed passageway which reduces the suction applied within the suction chamber 14 is provided at each end thereof so as to assist in the movement of the suction head across surfaces where a seal may otherwise be created. The linear air bleeds that are provided are desirably located towards the conduit towards the rear of the suction head 12. It will be recalled from the above that front wheels 54 are provided to enable the suction head 12 to easily travel over a surface and these linear air bleeds are desirably substantially parallel with the front wheels 54.
The bottom view provided in Figure 28(a) also shows a wiper 2810 that may be provided towards the rear 2815 of the suction chamber 14. The wiper 2810 is desirably formed from a resilient or elastomeric material that will allow it to flex during movement of the suction head. The wiper typically has a length sufficient to allow it to extend downwardly to the floor surface on which the suction head is cleaning. By providing such a wiper, a seal is provided to the chamber which as a result improves the suction within the suction chamber 14. The wiper is desirably provided across the width of the suction head, extending substantially from a first linear air bleed 2800a to a second linear air bleed provided at the opposite end of the suction head.
The wiper 2810 may be provided with an arcuate form, bending outwards in a mid-portion 2815 of the suction chamber such that its distance from a centre line A-A' is greater in the mid-portion of the suction chamber 14 than it is at the edges.
In addition to improving the suction within the suction chamber 14, the wiper may provide an additional contact with the surface on which the cleaner is being used so as to direct dirt on that surface into the outlet 32. The use of a wiper is particularly advantageous when the suction head is used on carpeted surfaces where the front wheels 54 may become embedded into the surface and as a result the rear 2820 tilts forwardly and upwardly causing a gap at that location which would affect the suction within the suction chamber 14. By having a wiper 2810 coincident with the rear 2820, the wiper will minimize any gaps in this rear portion 2820 of the head irrespective of any movement of the suction head away from the surface, thereby maintaining the suction at a desired level.
It will be appreciated that exemplary embodiments of a suction head have been described above to assist in an understanding of the teaching of the invention and it is not intended to limit the invention in any way except as may be deemed necessary in the light of the appended claims. Furthermore, where the invention has been described with reference to specific figures it will be understood that features or components of one figure can be interchanged with those of another figure without departing from the spirit or scope of the invention.
The words comprises/comprising when used in this specification are to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers , steps, components or groups thereof.
Figure 22b is a bottom view of a ninth embodiment of a suction head for a vacuum cleaner.
Figure 22c is a partially cut away front view of a ninth embodiment of a suction head for a vacuum cleaner.
Figure 22d is a side cross-section of a ninth embodiment of a suction head for a vacuum cleaner.
Figure 23a is a partially cut away plan view of a tenth embodiment of a suction head for a vacuum cleaner.
Figure 23b is a bottom view of a tenth embodiment of a suction head for a vacuum cleaner.
Figure 23c is a partially cut away front view of a tenth embodiment of a suction head for a vacuum cleaner.
Figure 23d is a side cross-section of a tenth embodiment of a suction head for a vacuum cleaner.
Figure 24a is a partially cut away plan view of an eleventh embodiment of a suction head for a vacuum cleaner.
Figure 24b is a bottom view of an eleventh embodiment of a suction head for a vacuum cleaner.
Figure 24c is a partially cut away front view of an eleventh embodiment of a suction head for a vacuum cleaner.
Figure 24d is a side cross-section of an eleventh embodiment of a suction head for a vacuum cleaner.
Figure 25 is a perspective view of another embodiment of vortex inducing means for use in an air bleed of a suction head for a vacuum cleaner.
Figure 26a is a plan view of a further embodiment of vortex inducing means including powder introducing means for use in an air bleed of a suction head for a vacuum cleaner.
Figure 26b is a side schematic view of a further embodiment of vortex inducing means including powder introducing means for use in an air bleed of a suction head for a vacuum cleaner.
Figure 27a is a plan view of a yet further embodiment of vortex inducing means including fluid introducing means for use in an air bleed of a suction head for a vacuum cleaner.
Figure 27b is a side schematic view of a yet further embodiment of vortex inducing means including fluid introducing means for use in an air bleed of a suction for a vacuum cleaner.
Figure 28a is a bottom view of a suction head in accordance with the present teaching.
Figure 28b is a top view of the suction head of Figure 28a.
Figure 28c is a cross-section through the suction head of Figure 28a.
Description of the preferred embodiment There will now be described by way of example a specific mode contemplated by the inventors. In the following description numerous specific details are set forth in order to provide a thorough understanding. It will be apparent however, to one skilled in the art, that the present invention may be practiced without limitation to these specific details. In other instances, well known methods and structures have not been described in detail so as not to unnecessarily obscure the description.
As shown in figures 1 to 4, an attachment for a vacuum cleaner 10 comprises a cleaning head or suction head 12 which includes a suction chamber 14 to create and contain a region of relatively low pressure adjacent to a surface 16 to be cleaned. As previously explained, the suction head 12 includes a peripheral member 18 which is arranged to locate against the surface 16. The peripheral member 18 is required to provide an effective suction chamber 14. However, on certain surfaces, a peripheral member 18 may form a very effective seal which prevents the suction head 12 from being manually moved over the surface 16. Accordingly, air inlet means (air bleeds 20) are required for the suction head 12. In the embodiment shown in figures 1 to 4, the suction head 12 includes side bleeds 19 which allow some air to enter into the suction chamber 14. This air flows substantially co-planar with the surface 16 to be cleaned. The suction head 12 induces a brush blade holder 50 which is arranged to retain a brush blade to aid the cleaning of the surface 16 and to help disturb and remove dust and debris. The suction head also includes rear wheels 52 and front wheels 54 to enable the suction head 12 to easily travel over a surface. In the preferred embodiment, the air inlet means comprise air bleeds 20 which produce a cyclonic airflow 28 as the atmospheric air passes through the air bleeds 20 into the suction head 12. This cyclonic airflow 27 is arranged to be directed towards the surface 16 to be cleaned and is arranged to travel (or penetrate) into the surface 16 to be cleaned. This cyclonic airflow is arranged to agitate the surface 16 to be cleaned and to, thereby, increase the efficiency of the vacuum cleaner 10. In an alternative embodiment, the air bleeds comprise airflow inducing means which may enable substantially generally linear airflow through the suction head 12 into the suction chamber 14. For example, the air bleeds 20 may comprise tubular portions which induce the substantially linear airflow into the suction chamber 14.
As shown in figure 11 a, figure 11 b and figure 11 c, in the preferred embodiment the airflow creates a cyclone directed towards an apex 30 wherein the apex 30 is arranged to be located below the level of the upper level of the surface 16 being cleaned. For example, the apex 30 of the cyclonic airflow 28 is arranged to locate within the fibers of a carpet such that the cyclonic airflow 28 agitates the fibers of the carpet and is arranged to disturb and disrupt dirt, debris and dust within the carpet.
Accordingly, the cyclonic bleeds 20 form the dual function of providing the essential air bleeds for the suction head 12 whilst also providing the function of a surface agitator.
The suction head 12 includes a plurality of cyclonic air bleeds 20, as shown in figures 5 to 10.
The cyclonic air bleeds 20 are arranged in at least one array and in the preferred embodiment the suction head 12 comprises two linear arrays of cyclonic air bleeds 20. The suction head 12 comprises a first linear array of first cyclonic air bleeds 20a which extends across the width of the suction head 12 and a second linear array of second cyclonic air bleeds 20b which extends across the width of the suction head 12. The second array is arranged to be located behind the first array. The second cyclonic air bleeds 22a in the second array are linearly offset from the first cyclonic air bleeds located in the first array, as shown in figure 2 and figure 4. This offset configuration increases the surface area which is subjected to agitation by the cyclones 28 created by the cyclonic air bleeds 20, for example, a suction head 12 is generally moved forwards and backwards and since the cyclones are offset then this reduces the likelihood of an area of the surface 16 not being subjected to direct agitation.
The arrays of cyclonic bleeds 20 may be arranged around the central connecting conduit 34 as shown in figure 10. Alternatively the first array of first cyclonic air bleeds 20a may be continuous whilst the second array of second cyclonic air bleed 20b may be arranged either side of the conduit 34, as shown in figure 4. Each cyclonic air bleed 20 comprises a chamber 22 including a frusto-conical surface 24 and has a tangential air inlet 26, as shown in figure 11 a, figure 11 b and 11 c. Each cyclonic air bleed 20 includes an outlet 27 which is located centrally at the lower end and directs the air flow outwardly into the suction chamber 14. In use, air enters through the tangential air inlet 20 and is drawn through the air bleed 20 by travelling around the frusto-conical surface 24 in a generally spiral or helical pattern 28 as shown in figure 11 c. Accordingly, the air flows downwardly in a helical manner with a decreasing diameter such that the airflow accelerates and travels towards an apex 30 (shown schematically in figure 11c). The air at the apex 30 is arranged to disturb and disrupt the carpet fibers in order to disturb and release dust and debris and the air then travels through the suction chamber 14 and through an outlet 32 whilst also carrying the dust and debris. As with conventional vacuum cleaners, the airflow including the dust and debris then travels through a conduit 34 and into a dust collecting chamber where the dust and debris is collected. The dust collecting chamber may comprise a conventional system or may comprise a cyclonic system.
Once the dust and debris has been deposited or at least a significant portion thereof, the air then flows back to the external atmosphere.
The suction chamber 14 is defined by an upper wall 36 and at least one peripheral wall 38. The outlets 27 of the cyclonic air bleeds 20 are located on the upper wall 36.
In the preferred embodiment, as shown in figure 2, the suction chamber 14 comprise a generally "H" shape such that the first array of cyclonic air bleeds 20a are located in a first linear section of the suction chamber 14 and the second array of cyclonic air bleeds 20b are located in a second linear section of the suction chamber and the two sections are connected centrally where the outlet 32 to the conduit 34 is located.
This reduces the surface area of the effective suction chamber 14 and thereby relatively increases the suction power. As shown in figure 5, the upper wall 36 of the suction chamber 14 is planar and is arranged, in use, to be co-planar with the surface 16 being cleaned. In addition, the suction chamber 14 may also incorporate auxiliary air bleeds 19 which are located around the peripheral wall 38 of the suction chamber 14. In the preferred embodiment, as shown in figures 1 to 5, the outlets 27 of the cyclonic air bleeds 20 are arranged to be flush with the upper wall 36 of the suction chamber 14.
The suction head 12 incorporates two main air paths which both share a central aperture 32 for suction. On each air path there are a series of vortex cones which terminate within the air path. In between each air path there is a brush to further help with the floor surface agitation. The floor head also has side bleeds 19 to help with wall/side pick-up. The suction floor head also incorporates a flexible hose linking the main aperture 32 and the pivoting arm. This allows flexibility and improved sealing of the air path. The main conduit for the vacuum cleaner is connected to a suction head 12 by a telescopic tube clip 56 and the suction head 12 includes a pivoting arm 58 and a pivoting joint 60. The suction head 12 comprises and is constructed from a top clamshell 62 and a bottom clamshell 64.
It can be seen that the present invention provides an improved cleaning head 12 for a vacuum cleaner 10 which includes agitation means which is produced efficiently and without any additional moving parts which could increase the risk of failure. The present invention achieves this advantage whilst also being energy efficient.
It is appreciated that the present invention may be incorporated in a cleaning head having a conventional brush bar agitator such that the action of the cyclonic bleeds 20 will complement the action of the brush bar.
As shown in figures 12 to figure 15, a second embodiment of a suction head 12 for a vacuum cleaner 10 comprises a first array of first cyclonic air bleeds 20a and a second array of second cyclonic air bleeds 20b. The outlets 27 of each cyclonic comprises a projecting portion 70 which projects downwardly from the upper wall 36 of the suction chamber 14. These projecting portions 70 effectively form pips and in this embodiment the pips are teardrop shaped with the apex 71 of the teardrop being located towards the outlet 32. This tear drop shape helps to improve the aerodynamics of the suction head 12 and prevents or inhibits any debris being built up and collected on the dead air side of the pips. This also allows the vortex to terminate closer to the floor surface 16 and therefore creates greater agitation.
Figure 16a to figure 16d shows a third embodiment of a suction head 12 for a vacuum cleaner. The outlets 27 of the cyclonic air bleeds 20a, 20b are located on a raised bar portion 74 which extends downwardly from the upper wall 36 of the suction chamber 14. The aim of the bar 74 is to prevent build up of debris and to create a clean air path within the suction chamber 14.
A fourth embodiment of a suction head 12 for a vacuum cleaner 10 is shown in figure 17a to figure 17d. In this embodiment, the suction head 12 comprises a first array of first cyclonic air bleeds 20a which are directed and angled rearwardly on the suction head 12. In addition, the suction head 12 comprises a second array of second cyclonic air bleeds 20b which are directed forwardly and angled downwardly on the suction head 12. This angled design provides a single linear arrangement of the apexes of the cyclonic air bleeds 20a, 20b in both the arrays and, thereby, aims to provide an even agitation of the surface to be cleaned.
A fifth embodiment of a suction head 12 for a vacuum cleaner 10 is shown in figure 18a to figure 18b. In this embodiment, the cyclonic air bleeds 20 have projecting portions 76 which extend downwardly from the upper wall 36 of the suction chamber 14. The projection portions 76 or pips are generally circular and enable the vortex to terminate closer to the floor surface 16 and thereby create greater agitation.
A sixth embodiment of the present invention is shown in figure 19a to figure 19d. In this embodiment the outlets 27 of the cyclonic air bleeds 20a, 20b are arranged to be flush with the upper wall 36 of the suction chamber 14. The aim of this arrangement is to prevent obstacles or debris and dirt within the suction chamber 14 wherein such dirt and debris may build up within the suction chamber 14 and reduce the effectiveness of the vacuum cleaner 10.
A seventh embodiment of a suction head 12 for a vacuum cleaner 10 is shown in figure 20a to figure 20d. In this embodiment, the suction head 12 comprises a first array of first cyclonic air bleeds 20a, a second array of second cyclonic air bleeds 20b and also a third array of third cyclonic air bleeds 20c. The third array of cyclonic air bleeds 20c is located in between the first array of cyclonic air bleeds 20a and the second array of a second cyclonic air bleed 20b. In addition, the first array of first cyclonic air bleeds 20a are generally angled rearwardly such that the apexes of the cyclones created by the first cyclonic air bleeds 20a generally coincide with the apexes of the cyclone as created by the third array of third cyclonic air bleeds 20c.
Similarly, the second cyclonic air bleeds 20b in the second array are angled downwardly and forwardly such that the apexes of the cyclones created in the second cyclonic air bleeds 20b coincide with the apexes of the cyclones created by both the first cyclonic air bleeds 20a and the third cyclonic air bleeds 20c.
It can be seen that all of the cyclonic air bleeds 20a, 20b, 20c are laterally offset along the suction head in order to provide a comprehensive linear arrangement of apexes to agitate the surface to be cleaned.
An eighth embodiment of the present invention is shown in figure 21a to figure 21d.
In this embodiment, the upper walls 36 of the suction head 14 is angled downwardly from the central position. In particular, the upper wall of the suction chamber 14 comprises a first lateral section 76 which extends downwardly from the central outlet 32 to a first lateral side and a second lateral section 78 extends downwardly from the central outlet 32 to a second lateral side. In this embodiment, the cyclonic air bleed comprise circular pips which project downwardly from the upper wall 36. In particular, as the pips located further away from the central outlet 32, the projecting 20 distance decreases until the outlets 27 of the cyclonic air bleeds 20a, 20b located at the lateral side of the suction head 12 are flush with the upper wall 36 of the suction chamber 14. Accordingly, the vortex terminates inside of the air path with pips supporting the end of the vortex cone. This allows the vortex to terminate closer to the floor surface and therefore creates greater agitation.
A ninth embodiment of a suction head 12 for use with in a vacuum cleaner 10 is shown in figure 22a to figure 22d. As previously described, the upper wall 36 of the suction chamber 14 is angled downwardly from a central location. However, in this embodiment, the cyclonic air bleeds 20a, 20b do not include pips but the outlets 27 of the cyclonic air bleeds 20a, 20b are substantially flush with the two sections 76, 78 of the upper wall 36 of the suction chamber 14. Accordingly, the vortex terminates flush with the air path so that there are no obstacles for debris and dirt to build up against.
A tenth embodiment of a suction head 12 for a vacuum cleaner 10 is shown in figure 23a to figure 23d. In this embodiment, the suction head 12 includes extra linear air bleeds 80 in between the vortexes. In particular, the linear air bleeds 80 include an air inlet 82 where air from the atmosphere is drawn in to the suction chamber 14.
The linear air bleeds 80 comprise air outlets 84 where the air is introduced into the suction chamber 14. These outlets 84 are located between the air outlets 27 for the cyclonic air bleeds 20a, 20b. In this embodiment, the cyclonic air bleeds 20a, 20b include circular pips. In particular, the vortex terminates inside of the air path with pips supporting the end of the vortex cone. This allows the vortex to terminate closer to the floor surface and therefore creates greater agitation. The linear air bleeds 80 incorporated in between the vortex cones also helps with the agitation. In this embodiment, the upper wall of the suction chamber is arranged to be substantially co-planar with the surface 16 to be cleaned.
An eleventh embodiment of a suction head 12 for a vacuum cleaner 10 is shown in figure 24a to figure 24d. In this embodiment, the suction head 12 includes linear air bleeds 80 in order for air to be introduced into the suction chamber 14 to supplement that supplied by the cyclonic air bleeds 20. Each linear air bleed 80 includes an air inlet and an air outlet 84. The air outlets 84 which introduce the air into the suction chamber 14 are located in between adjacent air outlets 27 cyclonic of air bleeds 20a, 20b. In addition, the suction head 12 includes a linear row of linear air bleed outlets 84 located between the first array of first cyclonic air bleeds 20a and the second array of second cyclonic air bleeds 20b. In this embodiment the vortex terminates inside of the air path with pips supporting the end of the vortex cone. This allows the vortex to terminate closer to the floor surface and therefore creates greater agitation.
In addition, the upper wall 36 of the suction chamber 14 is arranged to be substantially co-planar with the surface 16 to be cleaned. In further embodiments of the present invention, the cyclonic air bleeds 20 include fluid introducing means whereby liquids or powders etc can be introduced into the cyclonic airflow path 27 in order to supplement the cleaning function of the suction head 12 as shown in figure 25. As shown in figure 26a and figure 26b, the cyclonic air bleed 20 includes an air inlet 26 and a powder introducing inlet 90. The powder introducing inlet 90 is arranged tangentially with the respect to the frusto-conical surface such that the powder 92 is drawn into the cyclonic airflow 27. The powder inlet 90 is arranged to be located 1800 offset relative to the air inlet 26.
Similarly, the cyclonic air bleed 20 may include a liquid introducing means as shown in figure 27a and figure 27b. As with the powder introducing means, the liquid introducing means includes a liquid inlet 96 whereby a liquid 98 and, in particular, droplets of liquid 98 or an atomised liquid are drawn into the cyclonic airflow 28 within the frusto-conical surface 22 through a liquid inlet 96. There are various methods in which the vortex technology can be utilized in household cleaning.
The aforementioned methods and apparatus can be used to utilize air in helping with surface agitation. The main method involves drawing in air tangentially to the vortex cone. Due to the geometry, the cone air is encouraged to spin around the inside which thereby speeds up the velocity and peaks at the bottom of the cone which then agitates the surface to be cleaned. As mentioned above, there can be means to control the introduction of a powder into a second air duct at the top of the vortex cone. The powder can be perfumed or antibacterial depending on the purpose/application. Similarly, a liquid could be fed into the vortex cone in a controlled manner. The liquid would be carried in the air which would terminate within the carpet fibers. Depending upon the application, the liquid could be perfumed, antibacterial/cleaning solution.
Figures 28a to 28c show a further arrangement of a suction head in accordance with the present teaching. The same reference numerals will be used for similar parts. In this arrangement, in addition to the cyclonic or vortex air bleeds 20, first and second linear air bleeds 2800 are provided at each end of the suction head. Each of the linear air bleeds 2800 have an exit aperture 2800b provided on an upper surface of the suction head and an exit aperture 2900a provided within the suction chamber 14.
In this way an air-bleed passageway which reduces the suction applied within the suction chamber 14 is provided at each end thereof so as to assist in the movement of the suction head across surfaces where a seal may otherwise be created. The linear air bleeds that are provided are desirably located towards the conduit towards the rear of the suction head 12. It will be recalled from the above that front wheels 54 are provided to enable the suction head 12 to easily travel over a surface and these linear air bleeds are desirably substantially parallel with the front wheels 54.
The bottom view provided in Figure 28(a) also shows a wiper 2810 that may be provided towards the rear 2815 of the suction chamber 14. The wiper 2810 is desirably formed from a resilient or elastomeric material that will allow it to flex during movement of the suction head. The wiper typically has a length sufficient to allow it to extend downwardly to the floor surface on which the suction head is cleaning. By providing such a wiper, a seal is provided to the chamber which as a result improves the suction within the suction chamber 14. The wiper is desirably provided across the width of the suction head, extending substantially from a first linear air bleed 2800a to a second linear air bleed provided at the opposite end of the suction head.
The wiper 2810 may be provided with an arcuate form, bending outwards in a mid-portion 2815 of the suction chamber such that its distance from a centre line A-A' is greater in the mid-portion of the suction chamber 14 than it is at the edges.
In addition to improving the suction within the suction chamber 14, the wiper may provide an additional contact with the surface on which the cleaner is being used so as to direct dirt on that surface into the outlet 32. The use of a wiper is particularly advantageous when the suction head is used on carpeted surfaces where the front wheels 54 may become embedded into the surface and as a result the rear 2820 tilts forwardly and upwardly causing a gap at that location which would affect the suction within the suction chamber 14. By having a wiper 2810 coincident with the rear 2820, the wiper will minimize any gaps in this rear portion 2820 of the head irrespective of any movement of the suction head away from the surface, thereby maintaining the suction at a desired level.
It will be appreciated that exemplary embodiments of a suction head have been described above to assist in an understanding of the teaching of the invention and it is not intended to limit the invention in any way except as may be deemed necessary in the light of the appended claims. Furthermore, where the invention has been described with reference to specific figures it will be understood that features or components of one figure can be interchanged with those of another figure without departing from the spirit or scope of the invention.
The words comprises/comprising when used in this specification are to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers , steps, components or groups thereof.
Claims (44)
1. A suction head for a vacuum cleaner, the suction head comprising at least one air bleed wherein the air bleed comprises airflow inducing means in order to create an airflow directed substantially towards the surface to be cleaned within a suction chamber, and wherein the airflow inducing means comprises vortex inducing means.
2. A suction head for a vacuum cleaner according to claim 1, in which, in use, the axis of the vortex is substantially perpendicular to the surface to be cleaned.
3. A suction head for a vacuum cleaner according to claim 1, comprising a plurality of air bleeds.
4. A suction head for a vacuum cleaner according to claim 3 in which each air bleed incorporates respective vortex inducing means.
5. A suction head for a vacuum cleaner according to claim 4 in which, in use, the axes of the vortices are each perpendicular to the surface to be cleaned.
6. A suction head for a vacuum cleaner according to claim 1, in which the airflow inducing means comprises a substantially frusto-conical shaped surface.
7. A suction head for a vacuum cleaner according to claim 6 in which the frusto-conical shaped surface is tapered downwardly.
8. A suction head for a vacuum cleaner according to claim 7 in which an upper cross-section of the frusto-conical shaped surface is substantially circular having a radius which is greater than the radius of the frusto-conical shaped surface at a lower cross-section.
9. A suction head for a vacuum cleaner according to claim 1, in which the airflow inducing means comprises an air inlet and air outlet.
10. A suction head for a vacuum cleaner according to claim 9 in which the air inlet is arranged to induce vortex airflow within the airflow inducing means.
11. A suction head for a vacuum cleaner according to claim 10, in which the air inlet is arranged to direct the air inflow around the frusto-conical shaped surface of the airflow inducing means.
12. A suction head for a vacuum cleaner according to claim 11, in which the air inlet is arranged substantially tangentially relative to the frusto-conical shaped surface in order to direct the air substantially tangentially with the respect to the frusto-conical shaped surface.
13. A suction head for a vacuum cleaner according to claim 9, in which the air outlet is arranged substantially centrally in the airflow inducing means.
14. A suction head for a vacuum cleaner according to claim 13 in which the air outlet directs the air generally outwardly from the airflow inducing means.
15. A suction head for a vacuum cleaner according to claim 1, in which the suction head comprises an array of air bleeds.
16. A suction head for a vacuum cleaner according to claim 15, in which the array of air bleeds is arranged such that the air inlets of the air bleeds are located on an upper surface of the suction head.
17. A suction head for a vacuum cleaner according to claim 1, comprising a suction chamber defined by an upper wall and a peripheral wall which provides an open face for locating adjacent to a surface to be cleaned.
18. A suction head for a vacuum cleaner according to claim 17, in which the air bleeds have air outlets which are located on the upper wall of the suction chamber.
19. A suction head for a vacuum cleaner according to claim 17, in which the air outlets of the air bleeds comprise a projecting portion which projects downwardly into the suction chamber relative to the upper wall of the suction chamber.
20. A suction head for a vacuum cleaner according to claim 17, in which the air outlets of the air bleeds are substantially flush with the upper wall of the suction chamber.
21. A suction head for a vacuum cleaner according to claim 1, in which the airflow inducing means is arranged to produce an airflow directed towards an apex.
22. A suction head for a vacuum cleaner according to claim 21 in which, in use, the apex is arranged to be located at the surface to be cleaned.
23. A suction head for a vacuum cleaner according to claim 3, in which the air bleeds are arranged substantially linearly across the width of the suction head.
24. A suction head for a vacuum cleaner according to claim 1, in which the suction head comprises a first array or line of air bleeds and a second array or line of air bleeds.
25. A suction head for a vacuum cleaner according to claim 24 in which the air bleeds in the second array or line are laterally offset from the air bleeds in the first array or line.
26. A suction head for a vacuum cleaner according to claim 17, in which the upper wall of the suction chamber is planar.
27. A suction head for a vacuum cleaner according to claim 26, in which the upper wall of the suction chamber is arranged, in use, to be co-planar with the surface to be cleaned.
28. A suction head for a vacuum cleaner according to claim 17, in which the upper wall of the suction chamber is angled.
29. A suction head for a vacuum cleaner according to claim 28, in which the upper wall of the suction chamber comprises a first section that is angled downwardly from a central location to a first lateral side of the suction head and a second section that is angled downwardly from a central location to a second lateral side of the suction head.
30. A suction head for a vacuum cleaner according to claim 1, in which the airflow inducing means comprise a substantially tubular surface.
31. A suction head for a vacuum cleaner according to claim 30, in which the airflow inducing means induces substantially generally linear airflow.
32. A suction head as claimed in any preceding claim wherein the air bleed comprising airflow inducing means in order to create an airflow directed substantially towards the surface to be cleaned defines a first set of air bleeds, the vacuum cleaner further comprising a second set of air bleeds, the second set providing an air-bleed passageway which operably reduces the suction applied within a suction chamber of the suction head.
33. A suction head as claimed in any preceding claim comprising a wiper extending across a rear portion of the suction head.
34. A suction head as claimed in claim 33 wherein the wiper is formed from a resilient material.
35. A suction head as claimed in claim 33 or 34 wherein the wiper has an arcuate form, its distance from a centre line of the suction head being greater in a mid-portion of the suction head than at edges of the suction head.
36. A suction head as claimed in any one of claims 33 to 35 wherein the wiper operably provides a seal extending across the rear of the suction head.
37. A suction head as claimed in any preceding claim comprising fluid introducing means wherein the fluid introducing means is arranged to introduce a fluid into the airflow within the air bleed.
38. A suction head as claimed in claim 37 wherein the fluid comprises a liquid or a powder.
39. A suction head as claimed in claim 38 wherein the fluid is perfumed and/or comprises an antibacterial constituent.
40. A suction head as claimed in any one of claims 37 to 39 wherein the fluid introducing means comprises a fluid inlet.
41. A vacuum cleaner comprising a suction head as claimed in any preceding claim.
42. A vacuum cleaner according to claim 41, in which the vacuum cleaner comprises one of a cylinder type vacuum cleaner, an upright type vacuum cleaner, a handheld vacuum cleaner.
43. A method of agitating a surface to be cleaned comprising providing a suction head including a suction chamber having an open face to be located adjacent to a surface to be cleaned, the method comprising forming a vortex airflow directed substantially towards the surface to be cleaned within the suction chamber.
44. A method according to claim 43, in which the method comprises forming a plurality of vortex airflows directed substantially towards the surface to be cleaned.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2702516A CA2702516C (en) | 2010-05-03 | 2010-05-03 | Improvements in and relating to vacuum cleaners |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2702516A CA2702516C (en) | 2010-05-03 | 2010-05-03 | Improvements in and relating to vacuum cleaners |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2702516A1 true CA2702516A1 (en) | 2011-11-03 |
| CA2702516C CA2702516C (en) | 2017-06-27 |
Family
ID=44900822
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2702516A Expired - Fee Related CA2702516C (en) | 2010-05-03 | 2010-05-03 | Improvements in and relating to vacuum cleaners |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2702516C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2520549A (en) * | 2013-11-25 | 2015-05-27 | Hoover Ltd | Vacuum cleaner head |
-
2010
- 2010-05-03 CA CA2702516A patent/CA2702516C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2520549A (en) * | 2013-11-25 | 2015-05-27 | Hoover Ltd | Vacuum cleaner head |
| GB2530932A (en) * | 2013-11-25 | 2016-04-06 | Hoover Ltd | Vacuum cleaner head |
| GB2530933A (en) * | 2013-11-25 | 2016-04-06 | Hoover Ltd | Vacuum cleaner head |
| GB2530931A (en) * | 2013-11-25 | 2016-04-06 | Hoover Ltd | Vacuum cleaner head |
| GB2530933B (en) * | 2013-11-25 | 2017-06-07 | Hoover Ltd | Vacuum cleaner head |
| GB2520549B (en) * | 2013-11-25 | 2017-06-14 | Hoover Ltd | Vacuum cleaner head |
| GB2530931B (en) * | 2013-11-25 | 2017-12-13 | Hoover Ltd | Vacuum cleaner head |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2702516C (en) | 2017-06-27 |
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| Date | Code | Title | Description |
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| EEER | Examination request |
Effective date: 20141110 |
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| MKLA | Lapsed |
Effective date: 20220301 |
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| MKLA | Lapsed |
Effective date: 20200831 |