EP2995234B1 - Suction nozzle for a vacuum cleaner or the like with dust-raising device - Google Patents
Suction nozzle for a vacuum cleaner or the like with dust-raising device Download PDFInfo
- Publication number
- EP2995234B1 EP2995234B1 EP15182633.6A EP15182633A EP2995234B1 EP 2995234 B1 EP2995234 B1 EP 2995234B1 EP 15182633 A EP15182633 A EP 15182633A EP 2995234 B1 EP2995234 B1 EP 2995234B1
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- EP
- European Patent Office
- Prior art keywords
- edge
- wall
- channel
- suction nozzle
- base plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000000428 dust Substances 0.000 description 13
- 239000000835 fiber Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000012530 fluid Substances 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 244000007853 Sarothamnus scoparius Species 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 239000011859 microparticle Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/02—Nozzles
Definitions
- the present invention relates to a suction nozzle to be fitted to an electric household appliance for performing cleaning by means of suction, such as a vacuum cleaner, an electric broom or a multi-purpose drum vacuum cleaner or a robot vacuum cleaner, for sucking up dust and/or fluids and/or dirt from a surface.
- suction such as a vacuum cleaner, an electric broom or a multi-purpose drum vacuum cleaner or a robot vacuum cleaner, for sucking up dust and/or fluids and/or dirt from a surface.
- the present invention relates to a suction nozzle with a dust-raising device.
- a vacuum cleaner, an electric broom or a similar electric household appliance for performing cleaning by means of suction comprises a suction nozzle for sucking up dust, dirt or fluids from a surface.
- a suction nozzle is generally referred to by the term "brush”.
- suction nozzle and “brush” are considered to be equivalent.
- vacuum cleaner will be used with a broad meaning so as to include all those apparatus, for professional or domestic use, which perform cleaning by means of suction.
- vacuum cleaner will comprise a vacuum cleaner, an electric broom, a so-called multi-purpose drum vacuum cleaner or a robot vacuum cleaner, a centralized suction system for domestic or industrial use and an apparatus for supplying and sucking in steam.
- a known suction nozzle comprises a base plate shaped so as to have at least one base plate channel open towards a surface to be vacuumed, a suction channel which, during use, is joined to the base plate and is in fluid communication with the base plate and optionally a covering body which can be connected to the base plate/suction channel assembly.
- the other end of the suction channel communicates with a suction tube usually via a rotatable joint.
- suction nozzles in which the suction channel, during use, is joined to the covering body.
- width of a suction nozzle will be understood as meaning the maximum dimension (or footprint) of a suction nozzle without the covering body and calculated substantially parallel to a longitudinal axis of the base plate channel.
- suction efficiency will be understood as meaning essentially the ratio, in percentage terms, of the vacuumed material to the material to be vacuumed.
- the vacuuming tests are carried out in accordance with the provisions of the standard EN 60312-1:2013-05.
- the Applicant has discovered that the suction efficiency on these surfaces is increased by suitably shaping the front and/or rear edge of the base plate channel so as to raise the material to be vacuumed when the suction nozzle is pushed forwards and/or pulled backwards.
- the invention relates to a suction nozzle for a vacuum cleaner or the like, comprising a base plate with a base plate channel open towards the surface to be vacuumed, wherein said base plate channel comprises a first edge, a second edge, a first channel wall, a second channel wall and a channel bottom substantially opposite an opening formed between said first edge and said second edge, wherein said first channel wall comprises a first main wall and said second channel wall comprises a second main wall; wherein said first and second main walls are inclined so as to converge towards the bottom and wherein said first channel wall also comprises a first edge wall inclined so as to diverge from the second main wall towards the bottom.
- the first edge wall forms a first tooth.
- the first main wall and the first edge wall form an obtuse angle greater than 90 °.
- the angle formed between the first main wall and the first edge wall is preferably between about 110° and about 165°, more preferably between 120° and 165°. In a preferred embodiment which has produced optimum results it is equal to about 150°-152°.
- the first channel wall may be the front wall or the rear wall of the base plate channel.
- said second channel wall also comprises a second edge wall inclined so as to diverge from the first main wall towards the bottom.
- the second edge wall forms a second tooth.
- the second main wall and the second edge wall form an obtuse angle greater than 90° and less than 180°.
- the angle formed between the second main wall and the second edge wall is preferably between about 110° and about 165°, more preferably between 110° and 145°. In a preferred embodiment which has produced optimum results it is equal to about 130°-132°.
- the dust-raising device comprises the first tooth and/or the second tooth.
- the main action of the (first and/or second) tooth is that of moving the fibers of the surface to be cleaned (carpets, rugs, mats, etc.). Therefore, by moving the fibers, the dust is detached more easily from the surface to be cleaned and is therefore more easily sucked up.
- the first tooth is preferably provided substantially along the whole first edge. Alternatively it may be provided only along a central portion of the first edge or only along two end sections of said first edge or along the central portion of the first edge and along the end sections of the first edge or along a plurality of discrete sections of the first edge.
- the second tooth is preferably provided substantially along the whole second edge. Alternatively it may be provided only along a central portion of the second edge or only along two end sections of the second edge or along the central portion of the second edge and along the end sections of the second edge or along a plurality of discrete sections of the second edge.
- the first tooth has a substantially triangular shape with a height of between about 1 mm and about 1.5 mm.
- the first tooth has a width of between about 0,5 mm and about 1 mm.
- the first edge surface forms an angle of about 40° - 65° with respect to a horizontal plane between said first edge and said second edge.
- the second tooth has a substantially triangular shape with a height of a between about 0,5 mm and about 1 mm.
- the second tooth has a width of between about 0.5 mm and about 1 mm.
- the second edge surface forms an angle of about 30° - 60° with respect to a horizontal plane between said first edge and said second edge.
- the base plate channel has a central portion offset with respect to the end sections.
- the suction nozzle may have a front strip inclined at an angle of between 12° and 18° with respect to a plane in which the first edge and the second edge of the base plate channel lie.
- the suction nozzle comprises a rear strip having a width greater than the width of the front strip and wherein the rear strip has an inclined part and a flat part and wherein the inclined part is configured so that, during use, the suction nozzle may rotate upwards when pulled backwards and wherein the inclined part of the rear strip is inclined at an angle of between about 12° and about 18° with respect to the plane in which the first and second edges of the channel lie.
- the suction nozzle is denoted overall by the reference number 1.
- the suction nozzle 1 comprises a base plate 2 with at least one base plate channel 3 open downwards, namely towards a surface to be vacuumed.
- it comprises also a curved and suitably shaped suction channel 4 and a rotatable joint 5 rotating about an axis 6.
- the assembly consisting of the channel 3, the channel 4 and the joint 5 forms the suction duct 7.
- the base plate 2 and the base plate channel 3 are described in greater detail hereinbelow.
- the base plate 2 ( Figure 4 ) has preferably a more or less rectangular shape with rounded corner edges. It has a greater dimension (length) L2 and a smaller dimension (width) W2.
- the base plate channel 3 extends substantially (at least partly) parallel to the length L2 of the base plate 2.
- the base plate channel 3 extends substantially over the entire length L2 of the base plate, from one end to the other.
- the base plate channel 3 may be substantially straight or, as shown in Figure 4 , have a central portion offset with respect to the end sections.
- the present invention is not limited to either embodiment.
- the shape of the base plate channel 3, in plan view, has preferably a front edge 31 which is substantially straight and parallel to the front edge 21 of the base plate 2 or is formed with straight sections joined by curved sections.
- the rear edge 32 of the base plate channel 3 is preferably parallel to the rear edge 22, of the base plate along its whole length L2 except for optionally the ends 33 which are preferably inclined towards the front edge 31 such that the width of the base plate channel 3 is gradually reduced.
- the minimum width of the base plate channel is between 40% and 60% of its maximum width.
- the maximum width of the base plate channel 3 is 5-7% of the length L2 of the base plate channel 3.
- the minimum width is substantially 50% of the maximum width.
- the minimum width of the base plate channel at the ends 33 is about 8.22 mm.
- Each of the two end sections 33 of base plate channel 3 with decreasing width has a length L33 (measured parallel to the front edge 21) of between 9% and 13% of the length of the base plate channel. Preferably it is equal to about 11.7%. In the embodiment in which the length L2 of the base plate is equal to 253 mm, each of the sections L33 measures about 29 mm.
- the front strip 34 between the front edge 21 of the base plate and the front edge 31 of the channel 3 has a smaller width and is inclined so that, during use, the suction nozzle 1 may rotate downwards when pushed forwards.
- the front strip 34 is inclined at an angle of between 12°and 18° with respect to a horizontal plane H defined by the front edge 31 and rear edge 32 of the base plate channel 3.
- a band 35 of velvet or similar material is provided in order to trap between its fibers dust and other micro particles. It may be glued to the front strip 34 and optionally inset in a cavity not shown.
- the rear strip 36 between the rear edge 22 of the base plate and the rear edge 32 of the base plate channel 3 has a width greater than the width of the front strip 34.
- the rear strip 36 has an inclined part and a flat part. The inclined part is configured so that, during use, the suction nozzle 1 may rotate upwards when pulled backwards.
- the inclined part of the rear strip 36 is inclined at an angle of between about 12° and about 18° with respect to the plane H.
- a band 35 of velvet or similar material is provided in order to trap between its fibers dust and other micro particles. It may be glued to the rear strip 36 and optionally inset in a cavity not shown.
- the base plate channel 3 is open towards the surface to be vacuumed.
- the channel 3 is formed by the front edge 31, the rear edge 32, a front wall, a rear wall and the bottom 331.
- the bottom 331 is substantially opposite the opening formed between the front edge 31 and the rear edge. During use, the front and rear edges rest on the surface to be vacuumed.
- front may be replaced by the term “first” or "second”.
- rear may be replaced by the term “second” or "first”.
- the front wall comprises a main front wall 311 and, similarly, the rear wall comprises a main rear wall 321.
- Each of the two main (front and rear) walls extends from the bottom of the channel 3 towards the respective (front and rear) edges. If an edge surface (which will described below) is present, the main wall terminates where the edge wall starts. If an edge surface is not present, the main wall is flat, without discontinuities and terminates at the edge.
- the main front wall 311 and the main rear wall 321 are inclined so as to converge towards the bottom 331, as clearly shown in Figures 5.1 , 5.2 and 5.3 .
- a front edge wall 312 inclined so as to diverge from the rear end wall 321 towards the bottom 331 is provided.
- the front edge wall forms a front tooth 8 ( Figure 1 and Figure 5.1 ) configured to engage with the surface to be cleaned so as to favor the raising of dust or other particles from the fibrous support of the surface to be cleaned.
- the front tooth 8 may be provided along the whole front edge 31 (both on the straight sections and on the curved sections).
- the front tooth 8 may be provided along a part thereof (for example along the central portion and/or along the side sections).
- the front tooth 8 may be formed by segments separated by toothless sections so as to form a comb-like configuration.
- the front tooth 8 favors separation of the dust from the fibrous support of the surface to be cleaned, especially when the suction nozzle 1 is pulled backwards.
- the front tooth 8 has a substantially triangular shape projecting downwards and towards the inside of the channel 3 of the base plate 2.
- the front tooth 8 has a height 81 of between about 1 mm and about 1.5 mm. Preferably it has a height 81 of about 1.4 - 1.5 mm. The height 81 is measured with respect to the plane of the front strip 34.
- the front tooth 8 has a width 82 of between about 0.5 mm and about 1 mm. Preferably it has a width 82 of about 0.7 - 0.8 mm. The width 82 is measured in a direction perpendicular to the front surface 311 of the channel 3.
- the front edge wall 312 extends inside the base plate channel 3 from the front edge 31 and has an extension which may be easily calculated based on the height measurement 81 and width measurement 82.
- the front main wall 311 and the front edge wall 312 form an obtuse angle, namely an angle greater than 90°.
- the angle formed between the front main wall 311 and the front edge wall 312 is preferably between about 110° and about 165°, more preferably between 120° and 165°. In a preferred embodiment which has produced optimum results it is equal to about 150°-152°.
- the front tooth 8 forms an angle 83 with the horizontal plane H which joins together the front edge 31 and the rear edge 32, equal to about 60° - 80°. Preferably it is equal to about 65°-75°. More preferably it is equal to about 70°.
- the front tooth 8 forms an angle 84 with the front strip 34 equal to about 40°-60°. Preferably it is equal to about 50°-55°. In a preferred embodiment, the angle 84 is equal to about 52°.
- the tip of the front tooth 8 is substantially in the form of a sharp edge.
- a rear edge wall 322 inclined so as to diverge from the front main wall 311 towards the bottom 331 is provided along at least a part of the rear wall.
- the rear edge wall forms a rear tooth 9 ( Figure 2 and Figure 5.2 ) configured to engage with the surface to be cleaned so as to favor the raising of dust or other particles from the fibrous support of the surface to be cleaned.
- the front tooth 9 may be provided along the whole rear edge 32 (both on the straight sections and on the curved sections).
- the rear tooth 9 may be provided along a part thereof (for example along the central portion and/or along the side sections).
- the rear tooth 9 may be formed by segments separated by toothless sections so as to form a comb-like configuration.
- the rear tooth 9 favors separation of the dust from the fibrous support of the surface to be cleaned, especially when the suction nozzle 1 is pushed forwards.
- the rear tooth 9 has a substantially triangular shape projecting downwards and towards the inside of the channel 3 of the base plate 2.
- the rear tooth 9 has a height 91 of between about 0.5 mm and about 1 mm. Preferably it has a height 91 of about 0.5 - 0.8 mm. More preferably it has a height 91 of about 0.7 mm. The height 91 is measured with respect to the plane of the rear strip 36.
- the height 91 of the rear tooth is preferably less than the height 81 of the front tooth 81.
- the rear tooth 9 has a width 92 of between about 0.5 mm and about 1 mm. Preferably it has a width 92 of about 0.7 - 0.8 mm. The width 92 is measured in a direction perpendicular to the rear surface 321 of the channel 3.
- the rear edge wall 322 extends inside the base plate channel 3 from the rear edge 32 and has an extension which can be easily calculated based on the height measurement 91 and width measurement 92.
- the rear main wall 321 and the rear edge wall 322 form an obtuse angle, namely an angle greater than 90o.
- the angle formed between the rear main wall 321 and the rear edge wall 322 is preferably between about 110° and about 165°, more preferably between 110° and 145°. In a preferred embodiment which has produced optimum results it is equal to about 130°-132°.
- the rear tooth 9 forms an angle 93 with the horizontal plane H which joins together the front edge 31 and the rear edge 32, equal to about 30° - 60°. Preferably it is equal to about 40°-60°. In a preferred embodiment, the angle 93 is equal to about 45°.
- the tip of the rear tooth 9 is substantially in the form of a sharp edge.
- Figures 3 and 5.3 show a third embodiment of the present invention.
- the third embodiment is substantially a combination of the first embodiment with front tooth 8 and the second embodiment with rear tooth 9. All the comments made for the first and second embodiments are applicable to the third embodiment and will not be repeated.
- the dimensions and the inclination of the front edge wall 312 may remain unchanged along the whole front edge 31 or may vary.
- the dimensions and the inclination of the rear edge wall 322 may remain unchanged along the whole rear edge 32 or may vary.
- the front edge wall 312 and/or the rear edge wall 322 rub against the surface to be cleaned, which may be a non-compact or fibrous surface, such as a carpet, rug, mat, stair or hallway carpet or the like.
- the friction favors raising of dust (or other trapped particles) which are therefore more effectively vacuumed.
- the teeth bend the fibers and open up interstices which, once again, facilitate suction of the particles.
- the (front and/or rear) edge wall reduces slightly the width of the opening of the base channel and thus improves the suction performance compared to a base plate channel without teeth.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Nozzles For Electric Vacuum Cleaners (AREA)
Description
- The present invention relates to a suction nozzle to be fitted to an electric household appliance for performing cleaning by means of suction, such as a vacuum cleaner, an electric broom or a multi-purpose drum vacuum cleaner or a robot vacuum cleaner, for sucking up dust and/or fluids and/or dirt from a surface. In particular, the present invention relates to a suction nozzle with a dust-raising device.
- An example is given in
US-A-2626419 . - As is known, a vacuum cleaner, an electric broom or a similar electric household appliance for performing cleaning by means of suction comprises a suction nozzle for sucking up dust, dirt or fluids from a surface. In the sector of electric household appliances, a suction nozzle is generally referred to by the term "brush". For the purpose of the present description, therefore, the terms "suction nozzle" and "brush" are considered to be equivalent. Again for the purpose of the present invention, the term "vacuum cleaner" will be used with a broad meaning so as to include all those apparatus, for professional or domestic use, which perform cleaning by means of suction. Therefore, the term "vacuum cleaner" will comprise a vacuum cleaner, an electric broom, a so-called multi-purpose drum vacuum cleaner or a robot vacuum cleaner, a centralized suction system for domestic or industrial use and an apparatus for supplying and sucking in steam.
- Basically a known suction nozzle comprises a base plate shaped so as to have at least one base plate channel open towards a surface to be vacuumed, a suction channel which, during use, is joined to the base plate and is in fluid communication with the base plate and optionally a covering body which can be connected to the base plate/suction channel assembly. The other end of the suction channel communicates with a suction tube usually via a rotatable joint. Also known are suction nozzles in which the suction channel, during use, is joined to the covering body.
- In the present description and the claims the expression "width" of a suction nozzle, will be understood as meaning the maximum dimension (or footprint) of a suction nozzle without the covering body and calculated substantially parallel to a longitudinal axis of the base plate channel.
- In the present description and the claims the expression "suction efficiency" will be understood as meaning essentially the ratio, in percentage terms, of the vacuumed material to the material to be vacuumed. The vacuuming tests are carried out in accordance with the provisions of the standard EN 60312-1:2013-05.
- Although different suction nozzles which perform the function of sucking dust and/or fluids and/or dirt from a surface in a sufficiently efficient manner are available on the market, the Applicant has noticed that there exists the need to improve the performance of the known suction nozzles. In particular, the Applicant has noticed the need to increase the efficiency for suction of dust and dirt from surfaces which are not compact or are fibrous, such as carpets, rugs, mats, stair or hallway carpets or the like.
- The Applicant has discovered that the suction efficiency on these surfaces is increased by suitably shaping the front and/or rear edge of the base plate channel so as to raise the material to be vacuumed when the suction nozzle is pushed forwards and/or pulled backwards.
- According to an embodiment, the invention relates to a suction nozzle for a vacuum cleaner or the like, comprising a base plate with a base plate channel open towards the surface to be vacuumed,
wherein said base plate channel comprises a first edge, a second edge, a first channel wall, a second channel wall and a channel bottom substantially opposite an opening formed between said first edge and said second edge,
wherein said first channel wall comprises a first main wall and said second channel wall comprises a second main wall;
wherein said first and second main walls are inclined so as to converge towards the bottom and
wherein said first channel wall also comprises a first edge wall inclined so as to diverge from the second main wall towards the bottom. - The first edge wall forms a first tooth. The first main wall and the first edge wall form an obtuse angle greater than 90 °.
- The angle formed between the first main wall and the first edge wall is preferably between about 110° and about 165°, more preferably between 120° and 165°. In a preferred embodiment which has produced optimum results it is equal to about 150°-152°.
- The first channel wall may be the front wall or the rear wall of the base plate channel.
- According to an embodiment, said second channel wall also comprises a second edge wall inclined so as to diverge from the first main wall towards the bottom. The second edge wall forms a second tooth. The second main wall and the second edge wall form an obtuse angle greater than 90° and less than 180°.
- The angle formed between the second main wall and the second edge wall is preferably between about 110° and about 165°, more preferably between 110° and 145°. In a preferred embodiment which has produced optimum results it is equal to about 130°-132°.
- The dust-raising device according to the invention comprises the first tooth and/or the second tooth. The main action of the (first and/or second) tooth is that of moving the fibers of the surface to be cleaned (carpets, rugs, mats, etc.). Therefore, by moving the fibers, the dust is detached more easily from the surface to be cleaned and is therefore more easily sucked up.
- The first tooth is preferably provided substantially along the whole first edge. Alternatively it may be provided only along a central portion of the first edge or only along two end sections of said first edge or along the central portion of the first edge and along the end sections of the first edge or along a plurality of discrete sections of the first edge.
- The second tooth is preferably provided substantially along the whole second edge. Alternatively it may be provided only along a central portion of the second edge or only along two end sections of the second edge or along the central portion of the second edge and along the end sections of the second edge or along a plurality of discrete sections of the second edge.
- Preferably, the first tooth has a substantially triangular shape with a height of between about 1 mm and about 1.5 mm.
- Preferably, the first tooth has a width of between about 0,5 mm and about 1 mm.
- Preferably, the first edge surface forms an angle of about 40° - 65° with respect to a horizontal plane between said first edge and said second edge.
- Preferably, the second tooth has a substantially triangular shape with a height of a between about 0,5 mm and about 1 mm.
- Preferably, the second tooth has a width of between about 0.5 mm and about 1 mm.
- Preferably, the second edge surface forms an angle of about 30° - 60° with respect to a horizontal plane between said first edge and said second edge.
- Preferably, the base plate channel has a central portion offset with respect to the end sections.
- The suction nozzle may have a front strip inclined at an angle of between 12° and 18° with respect to a plane in which the first edge and the second edge of the base plate channel lie.
- Preferably, the suction nozzle comprises a rear strip having a width greater than the width of the front strip and wherein the rear strip has an inclined part and a flat part and wherein the inclined part is configured so that, during use, the suction nozzle may rotate upwards when pulled backwards and wherein the inclined part of the rear strip is inclined at an angle of between about 12° and about 18° with respect to the plane in which the first and second edges of the channel lie.
- The present invention will become clearer from the following detailed description, provided by way of a non-limiting example, to be read with reference to the accompanying drawings, in which:
-
Figure 1 shows a schematic cross-sectional view of a suction nozzle according to a first embodiment of the present invention; -
Figure 2 shows a schematic cross-sectional view of a suction nozzle according to a second embodiment of the present invention; -
Figure 3 shows a schematic cross-sectional view of a suction nozzle according to a third embodiment of the present invention; -
Figure 4 is a schematic plan view of a base plate of a suction nozzle according to an embodiment of the present invention; -
Figure 5.1 is a cross-sectional view, on a larger scale, of the base plate channel of the embodiment shown inFigure 1 ; -
Figure 5.2 is a cross-sectional view, on a larger scale, of the base plate channel of the embodiment shown inFigure 2 ; and -
Figure 5.3 is a cross-sectional view, on a larger scale, of the base plate channel of the embodiment shown inFigure 3 . - In the various figures, for the sake of clarity, some components not considered essential for the present invention have been omitted. In particular, the pedal and the associated control mechanism for moving a bristled support or a rubber fin which could be present in some embodiments are not shown. The suction nozzle is denoted overall by the
reference number 1. - With reference to the various figures, the
suction nozzle 1 comprises abase plate 2 with at least onebase plate channel 3 open downwards, namely towards a surface to be vacuumed. Preferably it comprises also a curved and suitably shapedsuction channel 4 and arotatable joint 5 rotating about anaxis 6. The assembly consisting of thechannel 3, thechannel 4 and thejoint 5 forms thesuction duct 7. - The
base plate 2 and thebase plate channel 3 are described in greater detail hereinbelow. - The base plate 2 (
Figure 4 ) has preferably a more or less rectangular shape with rounded corner edges. It has a greater dimension (length) L2 and a smaller dimension (width) W2. Thebase plate channel 3 extends substantially (at least partly) parallel to the length L2 of thebase plate 2. - The
base plate channel 3 extends substantially over the entire length L2 of the base plate, from one end to the other. Thebase plate channel 3 may be substantially straight or, as shown inFigure 4 , have a central portion offset with respect to the end sections. The present invention is not limited to either embodiment. - The shape of the
base plate channel 3, in plan view, has preferably afront edge 31 which is substantially straight and parallel to the front edge 21 of thebase plate 2 or is formed with straight sections joined by curved sections. - The
rear edge 32 of thebase plate channel 3 is preferably parallel to the rear edge 22, of the base plate along its whole length L2 except for optionally the ends 33 which are preferably inclined towards thefront edge 31 such that the width of thebase plate channel 3 is gradually reduced. - Preferably, the minimum width of the base plate channel is between 40% and 60% of its maximum width. The maximum width of the
base plate channel 3 is 5-7% of the length L2 of thebase plate channel 3. - In a preferred embodiment, the minimum width is substantially 50% of the maximum width. For example, for a base plate with L2=253 mm and a
base plate channel 3 with a width of about 16.4 mm, the minimum width of the base plate channel at theends 33 is about 8.22 mm. - Each of the two
end sections 33 ofbase plate channel 3 with decreasing width has a length L33 (measured parallel to the front edge 21) of between 9% and 13% of the length of the base plate channel. Preferably it is equal to about 11.7%. In the embodiment in which the length L2 of the base plate is equal to 253 mm, each of the sections L33 measures about 29 mm. - The
front strip 34 between the front edge 21 of the base plate and thefront edge 31 of thechannel 3 has a smaller width and is inclined so that, during use, thesuction nozzle 1 may rotate downwards when pushed forwards. - Preferably, the
front strip 34 is inclined at an angle of between 12°and 18° with respect to a horizontal plane H defined by thefront edge 31 andrear edge 32 of thebase plate channel 3. Preferably, in a central position, aband 35 of velvet or similar material is provided in order to trap between its fibers dust and other micro particles. It may be glued to thefront strip 34 and optionally inset in a cavity not shown. - The
rear strip 36 between the rear edge 22 of the base plate and therear edge 32 of thebase plate channel 3 has a width greater than the width of thefront strip 34. In one embodiment, therear strip 36 has an inclined part and a flat part. The inclined part is configured so that, during use, thesuction nozzle 1 may rotate upwards when pulled backwards. - Preferably, the inclined part of the
rear strip 36 is inclined at an angle of between about 12° and about 18° with respect to the plane H. Preferably, in a central position aband 35 of velvet or similar material is provided in order to trap between its fibers dust and other micro particles. It may be glued to therear strip 36 and optionally inset in a cavity not shown. - The
base plate channel 3 is open towards the surface to be vacuumed. Thechannel 3 is formed by thefront edge 31, therear edge 32, a front wall, a rear wall and the bottom 331. The bottom 331 is substantially opposite the opening formed between thefront edge 31 and the rear edge. During use, the front and rear edges rest on the surface to be vacuumed. - In the present description and in the claims, the term "front" may be replaced by the term "first" or "second". Similarly, the term "rear" may be replaced by the term "second" or "first".
- The front wall comprises a main
front wall 311 and, similarly, the rear wall comprises a mainrear wall 321. Each of the two main (front and rear) walls extends from the bottom of thechannel 3 towards the respective (front and rear) edges. If an edge surface (which will described below) is present, the main wall terminates where the edge wall starts. If an edge surface is not present, the main wall is flat, without discontinuities and terminates at the edge. - The main
front wall 311 and the mainrear wall 321 are inclined so as to converge towards the bottom 331, as clearly shown inFigures 5.1 ,5.2 and5.3 . - According to a first embodiment of the present invention, along at least a part of the front wall, a
front edge wall 312 inclined so as to diverge from therear end wall 321 towards the bottom 331 is provided. The front edge wall forms a front tooth 8 (Figure 1 andFigure 5.1 ) configured to engage with the surface to be cleaned so as to favor the raising of dust or other particles from the fibrous support of the surface to be cleaned. Thefront tooth 8 may be provided along the whole front edge 31 (both on the straight sections and on the curved sections). Alternatively, thefront tooth 8 may be provided along a part thereof (for example along the central portion and/or along the side sections). Alternatively, less preferably, thefront tooth 8 may be formed by segments separated by toothless sections so as to form a comb-like configuration. - The
front tooth 8 favors separation of the dust from the fibrous support of the surface to be cleaned, especially when thesuction nozzle 1 is pulled backwards. - As shown in the larger-scale view of
Figure 5.1 , thefront tooth 8 has a substantially triangular shape projecting downwards and towards the inside of thechannel 3 of thebase plate 2. - In one embodiment, the
front tooth 8 has aheight 81 of between about 1 mm and about 1.5 mm. Preferably it has aheight 81 of about 1.4 - 1.5 mm. Theheight 81 is measured with respect to the plane of thefront strip 34. - In one embodiment, the
front tooth 8 has awidth 82 of between about 0.5 mm and about 1 mm. Preferably it has awidth 82 of about 0.7 - 0.8 mm. Thewidth 82 is measured in a direction perpendicular to thefront surface 311 of thechannel 3. - Therefore, the
front edge wall 312 extends inside thebase plate channel 3 from thefront edge 31 and has an extension which may be easily calculated based on theheight measurement 81 andwidth measurement 82. The frontmain wall 311 and thefront edge wall 312 form an obtuse angle, namely an angle greater than 90°. - The angle formed between the front
main wall 311 and thefront edge wall 312 is preferably between about 110° and about 165°, more preferably between 120° and 165°. In a preferred embodiment which has produced optimum results it is equal to about 150°-152°. - In one embodiment, the
front tooth 8 forms anangle 83 with the horizontal plane H which joins together thefront edge 31 and therear edge 32, equal to about 60° - 80°. Preferably it is equal to about 65°-75°. More preferably it is equal to about 70°. - In one embodiment, the
front tooth 8 forms anangle 84 with thefront strip 34 equal to about 40°-60°. Preferably it is equal to about 50°-55°. In a preferred embodiment, theangle 84 is equal to about 52°. - Preferably the tip of the
front tooth 8 is substantially in the form of a sharp edge. - According to a second embodiment of the present invention, along at least a part of the rear wall, a
rear edge wall 322 inclined so as to diverge from the frontmain wall 311 towards the bottom 331 is provided. The rear edge wall forms a rear tooth 9 (Figure 2 andFigure 5.2 ) configured to engage with the surface to be cleaned so as to favor the raising of dust or other particles from the fibrous support of the surface to be cleaned. Thefront tooth 9 may be provided along the whole rear edge 32 (both on the straight sections and on the curved sections). Alternatively, therear tooth 9 may be provided along a part thereof (for example along the central portion and/or along the side sections). Alternatively, less preferably, therear tooth 9 may be formed by segments separated by toothless sections so as to form a comb-like configuration. - The
rear tooth 9 favors separation of the dust from the fibrous support of the surface to be cleaned, especially when thesuction nozzle 1 is pushed forwards. - As shown in the larger-scale view of
Figure 5.2 , therear tooth 9 has a substantially triangular shape projecting downwards and towards the inside of thechannel 3 of thebase plate 2. - In one embodiment, the
rear tooth 9 has aheight 91 of between about 0.5 mm and about 1 mm. Preferably it has aheight 91 of about 0.5 - 0.8 mm. More preferably it has aheight 91 of about 0.7 mm. Theheight 91 is measured with respect to the plane of therear strip 36. - The
height 91 of the rear tooth is preferably less than theheight 81 of thefront tooth 81. - In one embodiment, the
rear tooth 9 has awidth 92 of between about 0.5 mm and about 1 mm. Preferably it has awidth 92 of about 0.7 - 0.8 mm. Thewidth 92 is measured in a direction perpendicular to therear surface 321 of thechannel 3. - Therefore, the
rear edge wall 322 extends inside thebase plate channel 3 from therear edge 32 and has an extension which can be easily calculated based on theheight measurement 91 andwidth measurement 92. The rearmain wall 321 and therear edge wall 322 form an obtuse angle, namely an angle greater than 90º. - The angle formed between the rear
main wall 321 and therear edge wall 322 is preferably between about 110° and about 165°, more preferably between 110° and 145°. In a preferred embodiment which has produced optimum results it is equal to about 130°-132°. - In one embodiment, the
rear tooth 9 forms anangle 93 with the horizontal plane H which joins together thefront edge 31 and therear edge 32, equal to about 30° - 60°. Preferably it is equal to about 40°-60°. In a preferred embodiment, theangle 93 is equal to about 45°. - Preferably the tip of the
rear tooth 9 is substantially in the form of a sharp edge. -
Figures 3 and5.3 show a third embodiment of the present invention. The third embodiment is substantially a combination of the first embodiment withfront tooth 8 and the second embodiment withrear tooth 9. All the comments made for the first and second embodiments are applicable to the third embodiment and will not be repeated. - The dimensions and the inclination of the
front edge wall 312 may remain unchanged along the wholefront edge 31 or may vary. In the same way, the dimensions and the inclination of therear edge wall 322 may remain unchanged along the wholerear edge 32 or may vary. - During use, the
front edge wall 312 and/or therear edge wall 322 rub against the surface to be cleaned, which may be a non-compact or fibrous surface, such as a carpet, rug, mat, stair or hallway carpet or the like. The friction favors raising of dust (or other trapped particles) which are therefore more effectively vacuumed. In addition to raising dust, the teeth bend the fibers and open up interstices which, once again, facilitate suction of the particles. - In addition to the friction effect, the (front and/or rear) edge wall reduces slightly the width of the opening of the base channel and thus improves the suction performance compared to a base plate channel without teeth.
Claims (9)
- A suction nozzle (1) for a vacuum cleaner or the like, comprising a base plate (2) with a base plate channel (3) open towards a surface to be vacuumed,
wherein said base plate channel (3) comprises a first edge (31; 32), a second edge (32; 31), a first channel wall, a second channel wall and a channel bottom (331) substantially opposite an opening formed between said first edge (31; 32) and said second edge (32; 31),
wherein said first channel wall comprises a first main wall (311; 321) and said second channel wall comprises a second main wall (321; 311);
wherein said first and second main walls (311; 321) are inclined so as to converge towards the bottom (331) and
wherein said first channel wall (311; 321) also comprises a first edge wall (312; 322) inclined so as to diverge from the second main wall (321; 311) towards the bottom (331) so that an angle greater than 90° and less than 180° is formed between said first edge wall (312; 322) and said first main wall (311; 321). - The suction nozzle according to claim 1, wherein said second channel wall (321; 311) also comprises a second edge wall (322; 312) inclined so as to diverge from the first main wall (311; 321) towards the bottom (331) so that an angle greater than 90° and less than 180° is formed between said second edge wall (322; 312) and said second main wall (321; 311).
- The suction nozzle (1) according to claim 1 or 2, wherein said first edge wall (312; 322) is provided substantially along the whole of said first edge (31; 32).
- The suction nozzle (1) according to claim 1, 2 or 3, wherein said second edge wall (322; 312) is provided substantially along the whole of said second edge (32; 31).
- The suction nozzle (1) according to any one of the preceding claims, wherein said first edge wall (312; 322) is inclined at an angle (83) of about 60° - 80° with respect to a plane (H) lying between said first edge (31) and said second edge (32).
- The suction nozzle (1) according to any one of the preceding claims, wherein said second edge wall (322; 312) is inclined at an angle (93) of about 30° - 60° with respect to a plane (H) in which said first edge (31) and said second edge (32) lie.
- The suction nozzle (1) according to any one of the preceding claims, where the base plate channel (3) is substantially straight or has a central portion offset with respect to the end sections.
- The suction nozzle (1) according to any one of the preceding claims, wherein a front strip (34) is inclined at an angle of between 12° and 18° with respect to a plane in which the first edge and the second edge of the base plate (3) channel lie.
- The suction nozzle (1) according to claim 8, wherein a rear strip (36) has a width greater than the width of the front strip (34) and wherein the rear strip (36) has an inclined part and a flat part and wherein the inclined part is configured so that, during use, the suction nozzle (1) may rotate upwards when pulled backwards and wherein the inclined part of the rear strip (36) is inclined at an angle of between about 12° and about 18° with respect to the plane in which the first and second edges of the base plate channel (3) lie.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL15182633T PL2995234T3 (en) | 2014-08-28 | 2015-08-27 | Suction nozzle for a vacuum cleaner or the like with dust-raising device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITMI20141519 | 2014-08-28 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2995234A1 EP2995234A1 (en) | 2016-03-16 |
EP2995234B1 true EP2995234B1 (en) | 2017-01-25 |
Family
ID=51951890
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15182633.6A Active EP2995234B1 (en) | 2014-08-28 | 2015-08-27 | Suction nozzle for a vacuum cleaner or the like with dust-raising device |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP2995234B1 (en) |
DK (1) | DK2995234T3 (en) |
ES (1) | ES2622191T3 (en) |
HK (1) | HK1215660A1 (en) |
HU (1) | HUE032475T2 (en) |
PL (1) | PL2995234T3 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11564544B2 (en) | 2020-01-28 | 2023-01-31 | New Ermes Europe S.R.L. | Adapter device for a cordless electric vacuum cleaner |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3366179B1 (en) * | 2017-02-23 | 2019-07-24 | Wessel-Werk GmbH | Static floor nozzle for a vacuum cleaner |
US11224319B2 (en) | 2017-12-11 | 2022-01-18 | New Ermes Europe S.R.L. | Base plate for a vacuum cleaner suction head for the suction of fine dust and large debris |
FR3078878B1 (en) * | 2018-03-14 | 2022-08-19 | Seb Sa | VACUUM NOZZLE WITH A SLIDING SURFACE WITH A ROUNDED BACK EDGE |
JP1641037S (en) | 2018-09-18 | 2019-09-09 | ||
USD953673S1 (en) | 2020-02-17 | 2022-05-31 | New Ermes Europe S.R.L. | Head of a vacuum cleaner |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB191507450A (en) * | 1915-05-18 | 1916-01-27 | William Ratcliffe-Small | Improvements relating to Vacuum Cleaners. |
DE716982C (en) * | 1939-09-25 | 1942-02-03 | Electrolux Ab | Mouthpiece for vacuum cleaner |
US2626419A (en) * | 1950-06-06 | 1953-01-27 | Landers Frary & Clark | Vacuum cleaner nozzle and combing tooth construction therefor |
DE102012104706B4 (en) * | 2012-04-12 | 2022-09-29 | Vorwerk & Co. Interholding Gmbh | Suction nozzle with two suction mouths |
-
2015
- 2015-08-27 EP EP15182633.6A patent/EP2995234B1/en active Active
- 2015-08-27 HU HUE15182633A patent/HUE032475T2/en unknown
- 2015-08-27 DK DK15182633.6T patent/DK2995234T3/en active
- 2015-08-27 ES ES15182633.6T patent/ES2622191T3/en active Active
- 2015-08-27 PL PL15182633T patent/PL2995234T3/en unknown
-
2016
- 2016-03-30 HK HK16103629.5A patent/HK1215660A1/en unknown
Non-Patent Citations (1)
Title |
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None * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11564544B2 (en) | 2020-01-28 | 2023-01-31 | New Ermes Europe S.R.L. | Adapter device for a cordless electric vacuum cleaner |
Also Published As
Publication number | Publication date |
---|---|
PL2995234T3 (en) | 2017-07-31 |
DK2995234T3 (en) | 2017-04-24 |
EP2995234A1 (en) | 2016-03-16 |
HUE032475T2 (en) | 2017-10-30 |
HK1215660A1 (en) | 2016-09-30 |
ES2622191T3 (en) | 2017-07-05 |
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