US20170280956A1 - Suction head with improved suction channel - Google Patents
Suction head with improved suction channel Download PDFInfo
- Publication number
- US20170280956A1 US20170280956A1 US15/472,567 US201715472567A US2017280956A1 US 20170280956 A1 US20170280956 A1 US 20170280956A1 US 201715472567 A US201715472567 A US 201715472567A US 2017280956 A1 US2017280956 A1 US 2017280956A1
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- United States
- Prior art keywords
- outer tube
- base plate
- suction
- suction head
- channel
- 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.)
- Abandoned
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Classifications
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/02—Nozzles
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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
- A47L5/00—Structural features of suction cleaners
- A47L5/12—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum
- A47L5/22—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum with rotary fans
- A47L5/28—Suction cleaners with handles and nozzles fixed on the casings, e.g. wheeled suction cleaners with steering handle
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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
- A47L9/0081—Means for exhaust-air diffusion; Means for sound or vibration damping
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- 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
- A47L9/009—Carrying-vehicles; Arrangements of trollies or wheels; Means for avoiding mechanical obstacles
-
- 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
- A47L9/24—Hoses or pipes; Hose or pipe couplings
- A47L9/242—Hose or pipe couplings
- A47L9/244—Hose or pipe couplings for telescopic or extensible hoses or pipes
-
- 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
- A47L9/24—Hoses or pipes; Hose or pipe couplings
- A47L9/248—Parts, details or accessories of hoses or pipes
Definitions
- the present invention relates to a suction head to be fitted to an electric household appliance for performing cleaning by means of suction, such as a vacuum cleaner, an electric broom, a multi-purpose vacuum cleaner drum or a vacuum cleaner robot, for sucking up dust and/or fluids and/or dirt from a surface.
- suction such as a vacuum cleaner, an electric broom, a multi-purpose vacuum cleaner drum or a vacuum cleaner robot, for sucking up dust and/or fluids and/or dirt from a surface.
- the present invention relates to a suction head with an improved suction channel, substantially without narrow zones.
- a vacuum cleaner, an electric broom or a similar electric household appliance for performing cleaning by means of suction comprises a suction head for sucking up dust, dirt or fluids from a surface.
- a suction head is generally referred to by the term “brush”.
- suction head 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 vacuum cleaner drum, a vacuum cleaner robot, a centralized suction system for domestic or industrial use and an apparatus for supplying and sucking in steam.
- a known suction head 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 in fluid communication with the base plate and optionally a covering body.
- the covering body can be engaged with the base plate, the suction channel or both of them The other end of the suction channel communicates with a suction tube.
- a suction head is known, for example, from EP 2 944 242 and EP 1 600 091 in the name of the same Applicant.
- EP 1 367 931 A1 discloses a tilting joint in a vacuum cleaner suction 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-May.
- the Applicant has carefully considered the cross-section of the suction channel and has noted that in the known solutions there are discontinuous and/or narrow zones which prevent a regular suction flow. Owing to these discontinuous zones and significant variations in cross-section, the vacuuming efficiency is significantly reduced compared to that which can be obtained depending on the power of the motor.
- the suction channel may be shaped with a first fixed portion with a longitudinal axis which follows a circle arc and a second portion, also with a longitudinal axis, which follows a circle arc and is telescopically movable with respect to the fixed portion.
- the invention relates to a suction head for a vacuum cleaner or the like, comprising:
- the outer tube may comprise a first part with a longitudinal axis which follows a circumference portion.
- the first part of the outer tube could have a substantially circular cross-section measured along a plane perpendicular to said longitudinal axis.
- the inner tube could comprise a first part that receives fluid and a second part, wherein said second part of the inner tube has an outer surface substantially corresponding to an inner surface of the first part of the outer tube.
- the inner tube could terminate with a sealing lip.
- the arm arrangement could comprise two arms.
- the outer tube could comprise a second part having a reduced wall thickness and a circular notch for rotatably engaging an end edge of a joint.
- the base plate channel could comprise a front edge and a rear edge, wherein at least the surface of the lower face which extends along the front edge of the base plate channel and at least the surface of the lower face which extends along the rear edge of the base plate channel lie on a same plane.
- FIG. 1 shows a schematic cross-sectional view of a suction head according to an embodiment of the present invention in a first configuration
- FIG. 2 shows a schematic cross-sectional view of a suction head according to an embodiment of the present invention in a second configuration
- FIG. 3 shows a plan view of a base plate of the suction head shown in FIGS. 1 and 2 ;
- FIGS. 3A, 3B, 3C, 3D and 3E are cross-sections along the respective lines A-A of FIG. 3 ;
- FIG. 4 is a schematic view, from above, of the suction duct according to an embodiment of the invention.
- FIGS. 4A, 4B and 4C are cross-sections through the suction duct along the lines A, B and C in FIG. 4 ;
- FIG. 5 shows the suction channel partially disassembled
- FIG. 6 is a view, on larger scale, of a part of FIG. 5 ;
- FIG. 7 is a schematic cross-sectional view of the suction channel of the suction head according to FIGS. 1 and 2 ;
- FIGS. 8.1 and 8.2 show in schematic form, separately, the inner tube and the outer tube of the suction channel.
- FIG. 9 shows in schematic form an embodiment of engagement between the suction channel and the joint.
- the suction head is denoted overall by the reference number 1 .
- the term “inlet” of a certain component indicates a section, an area, a zone or a point where the suction air enters into the component when the suction head is mounted on a vacuum cleaner and this is in use.
- the term “outlet” of a certain component indicates a section, an area, a zone or a point where the suction air exits the component when the suction head is mounted on a vacuum cleaner and this is in use.
- front and rear relate to the suction head in its configuration for use: “front” indicates a component which is situated or directed in the direction of advancing movement of the suction head and “rear” indicates a component which is situated or directed in the return direction.
- the suction head 1 comprises a base plate 2 with at least one base plate channel 3 open downwards, namely towards a surface to be vacuumed.
- the suction head 1 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 base plate channel 3 , the suction channel 4 and the joint 5 forms the suction duct 7 .
- FIG. 3 shows a plan view of an embodiment of the base plate 2 of the suction head according to FIGS. 1 and 2 .
- FIGS. 3A-3E are cross-sections along the respective lines A-E of FIG. 3 .
- the base plate comprises a channel 3 of the base plate 2 which extends substantially over the entire width of the suction head.
- the channel 3 has a substantially constant width, apart from the end portions where it is narrower.
- the channel 3 has a smaller depth ( FIG. 3E ).
- the base plate channel increases in depth towards the centre ( FIGS. 3A-3C ). In the centre ( FIG. 3D ), the base plate channel opens out so that it can connect to the suction channel 4 .
- the front edge of the channel 3 is identified by the reference number 31 and the rear edge of the channel is identified by the reference number 32 .
- the surface of the base plate in the vicinity of the front edge 31 is substantially flat and horizontal.
- the surface of the base plate close to the rear edge 32 is substantially flat and horizontal.
- the base plate there are two strips of velvet 36 or the like, a front strip and a rear strip.
- the strips 36 may be inset in special suitably shaped cavities (shown in the cross-sections of FIGS. 3C and 3D ).
- the suction channel 4 is in fluid communication with the channel 3 of the base plate 2 .
- the suction channel 4 according to the present invention comprises a first portion 41 and a second portion 42 .
- the first portion is also called “inner tube” 41 and the second portion is also called “outer tube” 42 .
- the inner tube 41 of the suction channel 4 is connected to the base plate channel 3 via any known connection means.
- the connection may be of the press-engaging type or a fixing system with screws or rivets.
- the inner tube 41 of the suction channel 4 may be connected to the base plate 2 and to the base plate channel 3 by means of welding (for example ultrasound) or by means of gluing with adhesive.
- the inner tube 41 of the suction channel 4 may be formed as one piece with the base plate 2 and therefore with the base plate channel 3 .
- the inner tube 41 of the suction channel 4 comprises a first connecting part 41 a and a second part 41 b, the outer surface of which follows a curved tubular section.
- the curved tubular section has a longitudinal axis 41 c which follows a circle arc.
- the outer cross-section of the inner tube 41 (except for its first part 41 a which is connected to the base plate channel 3 ) is substantially circular.
- the cross-section of the suction channel along its second part 41 b could have an inner diameter of about 30-55 mm.
- the cross-sectional area of the inner tube 41 of the suction channel widens from the inlet towards the outlet and does not have narrow and/or discontinuous zones.
- the outlet edge of the inner tube 41 of the suction channel 4 terminates with a sealing lip 44 .
- the sealing lip 44 ensures a gentle transition between the inner tube and the outer tube 42 (which will be described here below) of the suction channel 4 .
- a gasket and/or O-ring made of rubber, plastic, Teflon or the like could be provided.
- FIG. 8.1 shows the inner tube separate from the outer tube and shows the surface 41 d which forms a surface suitable for the rotating telescopic movement with the outer tube. 42 .
- the internal cross-section of the inner tube 41 also along the surface 41 d, has a progression which is regular and increases towards the outlet end of the inner tube 41 .
- the inner tube 41 comprises a stop 45 for limiting the movement of the outer tube 42 with respect to the inner tube 41 .
- the stop 45 is shown in FIG. 1 and FIG. 8.1 .
- FIG. 2 shows the outer tube 42 in its end-of-travel position, with the edge against the stop 45 .
- the end portion of the joint 5 may be inclined at an angle ⁇ of about 40°.
- the end portion of the joint 5 may be inclined at an angle ⁇ of about 70°.
- Preferred values of ⁇ are, respectively, 41° and 73°.
- the outer tube 42 of the suction channel 4 is associated with the inner tube 41 telescopically so that the inner surface of the outer tube 42 cooperates with the outer surface of the inner tube 41 .
- This telescopic cooperation is shown in FIGS. 1 and 2 which show two different positions of the inner tube 41 with respect to the outer tube 42 .
- the outer tube 42 comprises a first part 42 a shaped with a curved tubular section, which is preferably substantially circular, and a second connecting part 42 b.
- the curved tubular section is shaped so as to have a longitudinal axis 42 c which follows a circle arc.
- the longitudinal axis 41 c of the inner tube 41 which follows a circle arc substantially coincides with (or forms an extension of) of the longitudinal axis 42 c of the outer tube 42 which follows a circle arc.
- the inner tube 41 of the suction channel 4 terminates with a sealing lip 44 for providing a fluid-tight seal between the inner tube 41 and the outer tube 42 .
- the lip 44 narrows towards the outlet in order to ensure a gentle transition between the two components.
- the inner tube 41 of the inlet channel 4 is fixed, while the outer tube 42 is rotatable and is telescopically associated with the inner tube 41 .
- the inner tube 41 always remains, at least partially, inside the outer tube 42 .
- the outer tube 42 preferably comprises a bushing 46 with a hole 47 for a pin 48 .
- the bushing 46 is fixed to the outer tube 42 along its bottom part.
- the axis 48 ′ of the bushing corresponds to the axis of rotation of the outer tube 42 .
- a pair of arms 9 are fixed to the base plate 2 and/or to the inner tube 41 and extend projecting towards the outer tube 42 and the rear part of the suction head 1 .
- the arms 9 may be solid or light-weight as shown in FIG. 5 .
- FIG. 7 illustrates in schematic form the relative rotational movement of the outer tube 42 and the inner tube 41 .
- the holes 92 are configured to support rotatably an axle 81 for the wheels 8 .
- the axle 82 of the wheels 8 is situated at the rear with respect to the axis 48 ′ for relative rotation of the outer tube and inner tube.
- the second part 42 b of the outer tube 42 of the suction channel 4 is preferably circular and operates as a connection for the rotatable joint 5 .
- FIG. 9 shows, by way of example, how the rotatable joint 5 is connected together with the outer tube 42 of the suction channel 4 .
- a snap-engaging connection may be envisaged between a tooth 512 formed on the circular edge of the joint 5 and a corresponding incision 49 formed in the outer surface of the second part 42 b of the outer tube 42 of the suction channel 4 .
- the thickness of the wall of the joint 5 and that of the outer tube 42 is reduced so that overall the thickness remains substantially unchanged.
- the angled joint 5 may rotate with respect to the outer tube 42 of the suction duct 4 .
- the rotation takes place about the axis 6 of the second portion 42 b of the outer tube 4 .
- the angled joint 5 may perform two rotations.
- the first rotation is a rotation in a plane, preferably a plane substantially perpendicular to the plane to be vacuumed and in which the suction head 1 moves.
- a rigid or flexible tube (not shown) may be connected to the outlet end of the joint 5 .
- any other joint which is straight, differently angled, rigid or flexible, may be associated with the outer tube 42 of the suction channel 4 .
- a brush body 10 may be fixed to one or more of the base plate 2 , the inner tube 41 of the suction channel 4 or the outer tube 42 of the suction channel 4 .
- the suction head may also comprise a cover 11 .
- the air flow from the base plate channel 3 to the suction channel 4 and the joint 5 does not have major discontinuous or narrow zones.
- the outer tube 42 has preferably a circular cross-section and an axis 42 c which follows a circle arc.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Nozzles For Electric Vacuum Cleaners (AREA)
- Electric Vacuum Cleaner (AREA)
Abstract
A suction head for a vacuum cleaner comprising a base plate with a base plate channel open towards a surface to be vacuumed and a suction channel in fluid communication with the base plate channel is described. Said suction channel comprises an inner tube and an outer tube, wherein the inner tube is fixed to the base plate channel and the outer tube is rotatable telescopically with respect to the inner tube.
Description
- The present invention relates to a suction head to be fitted to an electric household appliance for performing cleaning by means of suction, such as a vacuum cleaner, an electric broom, a multi-purpose vacuum cleaner drum or a vacuum cleaner robot, for sucking up dust and/or fluids and/or dirt from a surface. In particular, the present invention relates to a suction head with an improved suction channel, substantially without narrow zones.
- 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 head for sucking up dust, dirt or fluids from a surface. In the sector of electric household appliances, a suction head is generally referred to by the term “brush”. For the purpose of the present description, therefore, the terms “suction head” 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 vacuum cleaner drum, a vacuum cleaner robot, a centralized suction system for domestic or industrial use and an apparatus for supplying and sucking in steam.
- Basically a known suction head 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 in fluid communication with the base plate and optionally a covering body. The covering body can be engaged with the base plate, the suction channel or both of them The other end of the suction channel communicates with a suction tube.
- A suction head is known, for example, from
EP 2 944 242 andEP 1 600 091 in the name of the same Applicant. -
EP 1 367 931 A1 discloses a tilting joint in a vacuum cleaner suction channel. - DE 89 01 995 U1 discloses a vacuum cleaner.
- 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-May.
- Although various suction heads 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 heads. In particular, the Applicant has noticed the need to increase the efficiency for suction of dust and dirt from a surface.
- The Applicant has carefully considered the cross-section of the suction channel and has noted that in the known solutions there are discontinuous and/or narrow zones which prevent a regular suction flow. Owing to these discontinuous zones and significant variations in cross-section, the vacuuming efficiency is significantly reduced compared to that which can be obtained depending on the power of the motor.
- Another problem consists in the fact that these discontinuous zones and variations in cross-section create more noise which is not tolerated by users.
- The Applicant has discovered that, in order to keep the cross-section of the suction channel substantially constant, the suction channel may be shaped with a first fixed portion with a longitudinal axis which follows a circle arc and a second portion, also with a longitudinal axis, which follows a circle arc and is telescopically movable with respect to the fixed portion.
- According to an embodiment, the invention relates to a suction head for a vacuum cleaner or the like, comprising:
-
- a base plate) with a base plate channel open towards a surface to be vacuumed,
- a suction channel in fluid communication with the base plate channel,
- wherein said suction channel comprises an inner tube and an outer tube,
- wherein the inner tube is fixed to the base plate channel and the outer tube is rotatable telescopically with respect to the inner tube,
- a bushing fixed to said outer tube and a pivot pin, wherein said outer tube is rotatable about an axis of rotation of the pivot pin,
- an axle and wheels mounted at the ends of said axle for moving said suction head on the surface to be vacuumed,
- wherein said pivot pin of the outer tube is arranged in front of the axle, and
- an arm arrangement with first holes for the pivot pin and second holes for the axle of the wheels.
- The outer tube may comprise a first part with a longitudinal axis which follows a circumference portion.
- The first part of the outer tube could have a substantially circular cross-section measured along a plane perpendicular to said longitudinal axis.
- The inner tube could comprise a first part that receives fluid and a second part, wherein said second part of the inner tube has an outer surface substantially corresponding to an inner surface of the first part of the outer tube.
- The inner tube could terminate with a sealing lip.
- The arm arrangement could comprise two arms.
- The outer tube could comprise a second part having a reduced wall thickness and a circular notch for rotatably engaging an end edge of a joint.
- The base plate channel could comprise a front edge and a rear edge, wherein at least the surface of the lower face which extends along the front edge of the base plate channel and at least the surface of the lower face which extends along the rear edge of the base plate channel lie on a same plane.
- The present invention will become clearer from the following detailed description, provided purely by way of a non-limiting example, to be read with reference to the accompanying drawings, in which:
-
FIG. 1 shows a schematic cross-sectional view of a suction head according to an embodiment of the present invention in a first configuration; -
FIG. 2 shows a schematic cross-sectional view of a suction head according to an embodiment of the present invention in a second configuration; -
FIG. 3 shows a plan view of a base plate of the suction head shown inFIGS. 1 and 2 ; -
FIGS. 3A, 3B, 3C, 3D and 3E are cross-sections along the respective lines A-A ofFIG. 3 ; -
FIG. 4 is a schematic view, from above, of the suction duct according to an embodiment of the invention; -
FIGS. 4A, 4B and 4C are cross-sections through the suction duct along the lines A, B and C inFIG. 4 ; -
FIG. 5 shows the suction channel partially disassembled; -
FIG. 6 is a view, on larger scale, of a part ofFIG. 5 ; -
FIG. 7 is a schematic cross-sectional view of the suction channel of the suction head according toFIGS. 1 and 2 ; -
FIGS. 8.1 and 8.2 show in schematic form, separately, the inner tube and the outer tube of the suction channel; and -
FIG. 9 shows in schematic form an embodiment of engagement between the suction channel and the joint. - 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 head is denoted overall by the
reference number 1. - In the present description a number of expressions will be used with reference to the air flow during suction. For example, the term “inlet” of a certain component indicates a section, an area, a zone or a point where the suction air enters into the component when the suction head is mounted on a vacuum cleaner and this is in use. Similarly, the term “outlet” of a certain component indicates a section, an area, a zone or a point where the suction air exits the component when the suction head is mounted on a vacuum cleaner and this is in use.
- The relative terms “lower” and “upper” relate to the suction head in its operating configuration, namely when resting on a surface to be vacuumed.
- Finally, the terms “front” and “rear” relate to the suction head in its configuration for use: “front” indicates a component which is situated or directed in the direction of advancing movement of the suction head and “rear” indicates a component which is situated or directed in the return direction.
- With reference to the various figures, the
suction head 1 comprises abase plate 2 with at least onebase plate channel 3 open downwards, namely towards a surface to be vacuumed. Thesuction head 1 comprises also a curved and suitablyshaped suction channel 4 and arotatable joint 5 rotating about anaxis 6. The assembly consisting of thebase plate channel 3, thesuction channel 4 and the joint 5 forms thesuction duct 7. -
FIG. 3 shows a plan view of an embodiment of thebase plate 2 of the suction head according toFIGS. 1 and 2 .FIGS. 3A-3E are cross-sections along the respective lines A-E ofFIG. 3 . - According to the embodiment shown in
FIGS. 3 , the base plate comprises achannel 3 of thebase plate 2 which extends substantially over the entire width of the suction head. Preferably, thechannel 3 has a substantially constant width, apart from the end portions where it is narrower. - At the ends, the
channel 3 has a smaller depth (FIG. 3E ). The base plate channel increases in depth towards the centre (FIGS. 3A-3C ). In the centre (FIG. 3D ), the base plate channel opens out so that it can connect to thesuction channel 4. - The front edge of the
channel 3 is identified by thereference number 31 and the rear edge of the channel is identified by thereference number 32. The surface of the base plate in the vicinity of thefront edge 31 is substantially flat and horizontal. Similarly, the surface of the base plate close to therear edge 32 is substantially flat and horizontal. - Preferably, in the central zone of the base plate, there are two strips of
velvet 36 or the like, a front strip and a rear strip. Thestrips 36 may be inset in special suitably shaped cavities (shown in the cross-sections ofFIGS. 3C and 3D ). - The
suction channel 4 is in fluid communication with thechannel 3 of thebase plate 2. Thesuction channel 4 according to the present invention comprises afirst portion 41 and asecond portion 42. The first portion is also called “inner tube” 41 and the second portion is also called “outer tube” 42. - Preferably, the
inner tube 41 of thesuction channel 4 is connected to thebase plate channel 3 via any known connection means. For example, the connection may be of the press-engaging type or a fixing system with screws or rivets. Alternatively, theinner tube 41 of thesuction channel 4 may be connected to thebase plate 2 and to thebase plate channel 3 by means of welding (for example ultrasound) or by means of gluing with adhesive. By way of a further alternative, theinner tube 41 of thesuction channel 4 may be formed as one piece with thebase plate 2 and therefore with thebase plate channel 3. - The
inner tube 41 of thesuction channel 4 comprises a first connectingpart 41 a and asecond part 41 b, the outer surface of which follows a curved tubular section. Preferably, the curved tubular section has alongitudinal axis 41 c which follows a circle arc. Preferably, the outer cross-section of the inner tube 41 (except for itsfirst part 41 a which is connected to the base plate channel 3) is substantially circular. By way of a non-limiting example, the cross-section of the suction channel along itssecond part 41 b could have an inner diameter of about 30-55 mm. Preferably, the cross-sectional area of theinner tube 41 of the suction channel widens from the inlet towards the outlet and does not have narrow and/or discontinuous zones. - Preferably, the outlet edge of the
inner tube 41 of thesuction channel 4 terminates with a sealinglip 44. The sealinglip 44 ensures a gentle transition between the inner tube and the outer tube 42 (which will be described here below) of thesuction channel 4. As an alternative to the sealing lip 44 a gasket and/or O-ring made of rubber, plastic, Teflon or the like could be provided. - In order to ensure that the outer surface of the
inner tube 41 has a circular cross-section with theaxis 41 c which follows a circle portion, it may be envisaged suitably shaping the outer surface of theinner tube 41 without modifying the internal cross-section of theinner tube 41.FIG. 8.1 shows the inner tube separate from the outer tube and shows thesurface 41 d which forms a surface suitable for the rotating telescopic movement with the outer tube. 42. As can be seen fromFIG. 8.1 , the internal cross-section of theinner tube 41, also along thesurface 41 d, has a progression which is regular and increases towards the outlet end of theinner tube 41. - Preferably, the
inner tube 41 comprises astop 45 for limiting the movement of theouter tube 42 with respect to theinner tube 41. Thestop 45 is shown inFIG. 1 andFIG. 8.1 .FIG. 2 shows theouter tube 42 in its end-of-travel position, with the edge against thestop 45. In the position shown inFIG. 1 , the end portion of the joint 5 may be inclined at an angle α of about 40°. In the position shown inFIG. 2 , the end portion of the joint 5 may be inclined at an angle α of about 70°. Preferred values of α are, respectively, 41° and 73°. - The
outer tube 42 of thesuction channel 4 is associated with theinner tube 41 telescopically so that the inner surface of theouter tube 42 cooperates with the outer surface of theinner tube 41. This telescopic cooperation is shown inFIGS. 1 and 2 which show two different positions of theinner tube 41 with respect to theouter tube 42. - Preferably, therefore, the
outer tube 42 comprises afirst part 42 a shaped with a curved tubular section, which is preferably substantially circular, and a second connectingpart 42 b. The curved tubular section is shaped so as to have alongitudinal axis 42 c which follows a circle arc. When theinner tube 41 is telescopically associated with theouter tube 42, thelongitudinal axis 41 c of theinner tube 41 which follows a circle arc substantially coincides with (or forms an extension of) of thelongitudinal axis 42 c of theouter tube 42 which follows a circle arc. - As mentioned above, the
inner tube 41 of thesuction channel 4 terminates with a sealinglip 44 for providing a fluid-tight seal between theinner tube 41 and theouter tube 42. Preferably, thelip 44 narrows towards the outlet in order to ensure a gentle transition between the two components. - As mentioned above, the
inner tube 41 of theinlet channel 4 is fixed, while theouter tube 42 is rotatable and is telescopically associated with theinner tube 41. As a result of this telescopic connection, theinner tube 41 always remains, at least partially, inside theouter tube 42. - With reference to
FIGS. 4, 5 and 6 , the articulation which allows the relative rotational movement of the outer tube and the inner tube will now be described. - The
outer tube 42 preferably comprises abushing 46 with ahole 47 for apin 48. Thebushing 46 is fixed to theouter tube 42 along its bottom part. Theaxis 48′ of the bushing corresponds to the axis of rotation of theouter tube 42. - A pair of
arms 9 are fixed to thebase plate 2 and/or to theinner tube 41 and extend projecting towards theouter tube 42 and the rear part of thesuction head 1. Thearms 9 may be solid or light-weight as shown inFIG. 5 . - Two
holes arms 9. Theholes 91 are designed to cooperate with and rotatably support thepin 48. Thebushing 46 has a length corresponding to the distance between the two facing walls of thearms 9. Therefore, when the inner tube and the outer tube are joined together telescopically, thepin 48 will be inserted inside theholes 91 of thearms 9 and inside thehole 47 of thebushing 46.FIG. 7 illustrates in schematic form the relative rotational movement of theouter tube 42 and theinner tube 41. - The
holes 92 are configured to support rotatably anaxle 81 for thewheels 8. - Preferably, the
axle 82 of thewheels 8 is situated at the rear with respect to theaxis 48′ for relative rotation of the outer tube and inner tube. - With reference now to the figures, and in particular to
FIGS. 1, 2, 4 and 9 , the joint 5 and the rotatable connection with respect to thesuction channel 4 will now be described. - The
second part 42 b of theouter tube 42 of thesuction channel 4 is preferably circular and operates as a connection for therotatable joint 5.FIG. 9 shows, by way of example, how the rotatable joint 5 is connected together with theouter tube 42 of thesuction channel 4. In particular, a snap-engaging connection may be envisaged between a tooth 512 formed on the circular edge of the joint 5 and acorresponding incision 49 formed in the outer surface of thesecond part 42 b of theouter tube 42 of thesuction channel 4. Preferably, in the connection zone (as shown inFIG. 9 ), the thickness of the wall of the joint 5 and that of theouter tube 42 is reduced so that overall the thickness remains substantially unchanged. - The angled joint 5 may rotate with respect to the
outer tube 42 of thesuction duct 4. The rotation takes place about theaxis 6 of thesecond portion 42 b of theouter tube 4. - Therefore the angled joint 5 may perform two rotations. A first rotation with respect to the axis of
rotation 48′ of theouter tube 42 and a second rotation with respect to thelongitudinal axis 6 of the outlet part of theouter tube 42. The first rotation is a rotation in a plane, preferably a plane substantially perpendicular to the plane to be vacuumed and in which thesuction head 1 moves. - A rigid or flexible tube (not shown) may be connected to the outlet end of the
joint 5. As an alternative to the angled joint 5 shown inFIGS. 1 and 2 , any other joint which is straight, differently angled, rigid or flexible, may be associated with theouter tube 42 of thesuction channel 4. - A
brush body 10 may be fixed to one or more of thebase plate 2, theinner tube 41 of thesuction channel 4 or theouter tube 42 of thesuction channel 4. The suction head may also comprise acover 11. - As can be seen from
FIGS. 1 and 2 , both in the configuration shown inFIG. 1 and in the configuration shown inFIG. 2 , the air flow from thebase plate channel 3 to thesuction channel 4 and the joint 5 does not have major discontinuous or narrow zones. This is due to the novel telescopic relationship between the twoportions suction channel 4, in which the first portion 41 (that which receives air from the base plate channel 3) forms theinner tube 41 and is fixed with respect to thebase plate 2, while thesecond portion 42 forms the outer tube. Theouter tube 42 has preferably a circular cross-section and anaxis 42 c which follows a circle arc. Between theinner tube 41 and theouter tube 42 there is a sealinglip 44 for ensuring a gentle transition between the twotubes
Claims (8)
1. A suction head for a vacuum cleaner or the like comprising:
a base plate with a base plate channel open towards a surface to be vacuumed,
a suction channel in fluid communication with the base plate channel,
wherein said suction channel comprises an inner tube and an outer tube,
wherein the inner tube is fixed to the base plate channel and the outer tube is rotatable telescopically with respect to the inner tube,
a bushing fixed to said outer tube and a pivot pin, wherein said outer tube is rotatable about an axis of rotation of the pivot pin,
an axle and wheels mounted at the ends of said axle for moving said suction head on the surface to be vacuumed,
wherein said pivot pin of the outer tube is arranged in front of the axle, and
an arm arrangement with first holes for the pivot pin and second holes for the axle of the wheels.
2. The suction head of claim 1 , wherein said outer tube comprises a first part with a longitudinal axis which follows a circumference portion.
3. The suction head of claim 2 , wherein said first part of the outer tube has a substantially circular cross-section measured along a plane perpendicular to said longitudinal axis.
4. The suction head of claim 3 , wherein said inner tube comprises a first part that receives fluid and a second part, wherein said second part of the inner tube has an outer surface substantially corresponding to an inner surface of the first part of the outer tube.
5. The suction head of claim 3 , wherein said inner tube terminates with a sealing lip.
6. The suction head of claim 1 , wherein said arm arrangement comprises two arms.
7. The suction head of claim 1 , wherein said outer tube comprises a second part having a reduced wall thickness and a circular notch for rotatably engaging an end edge of a joint.
8. The suction head of claim 1 , wherein the base plate channel comprises a front edge and a rear edge, wherein at least the surface of the lower face which extends along the front edge of the base plate channel and at least the surface of the lower face which extends along the rear edge of the base plate channel lie on a same plane.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITUA2016A002159A ITUA20162159A1 (en) | 2016-03-31 | 2016-03-31 | Suction head with perfected suction channel |
IT102016000033201 | 2016-03-31 |
Publications (1)
Publication Number | Publication Date |
---|---|
US20170280956A1 true US20170280956A1 (en) | 2017-10-05 |
Family
ID=56296966
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US15/472,567 Abandoned US20170280956A1 (en) | 2016-03-31 | 2017-03-29 | Suction head with improved suction channel |
Country Status (8)
Country | Link |
---|---|
US (1) | US20170280956A1 (en) |
EP (1) | EP3225145B1 (en) |
CN (1) | CN107260065B (en) |
DK (1) | DK3225145T3 (en) |
ES (1) | ES2741829T3 (en) |
HU (1) | HUE045555T2 (en) |
IT (1) | ITUA20162159A1 (en) |
PL (1) | PL3225145T3 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USD922014S1 (en) | 2018-09-18 | 2021-06-08 | New Ermes S.r.l. | Accessory for vacuum cleaners |
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 |
USD953673S1 (en) | 2020-02-17 | 2022-05-31 | New Ermes Europe S.R.L. | Head of a vacuum cleaner |
US11564544B2 (en) | 2020-01-28 | 2023-01-31 | New Ermes Europe S.R.L. | Adapter device for a cordless electric vacuum cleaner |
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DK2944242T3 (en) | 2014-05-14 | 2019-11-11 | New Ermes Europe Srl | Suction head for a vacuum cleaner or similar with improved base plate channel |
-
2016
- 2016-03-31 IT ITUA2016A002159A patent/ITUA20162159A1/en unknown
-
2017
- 2017-03-20 CN CN201710163515.7A patent/CN107260065B/en active Active
- 2017-03-24 ES ES17162714T patent/ES2741829T3/en active Active
- 2017-03-24 EP EP17162714.4A patent/EP3225145B1/en active Active
- 2017-03-24 PL PL17162714T patent/PL3225145T3/en unknown
- 2017-03-24 HU HUE17162714A patent/HUE045555T2/en unknown
- 2017-03-24 DK DK17162714.4T patent/DK3225145T3/en active
- 2017-03-29 US US15/472,567 patent/US20170280956A1/en not_active Abandoned
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US4564972A (en) * | 1983-05-17 | 1986-01-21 | Etablissements Georges Olivier | Roller or skid type vacuum cleaner nozzle attachment |
DE19704796C1 (en) * | 1997-02-08 | 1998-01-15 | Wessel Werk Gmbh | Vacuum cleaner nozzle with low-noise characteristics |
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US20060137134A1 (en) * | 2004-12-23 | 2006-06-29 | Horst Dilger | Floor nozzle for vacuum cleaners |
US7798177B1 (en) * | 2006-09-07 | 2010-09-21 | Superior Tire & Rubber Corporation | Removable transition sleeve for a transition tube of a vacuum sweeper |
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EP2449934A2 (en) * | 2010-11-05 | 2012-05-09 | BSH Bosch und Siemens Hausgeräte GmbH | Suction nozzle assembly for a floor vacuum cleaner |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
USD922014S1 (en) | 2018-09-18 | 2021-06-08 | New Ermes S.r.l. | Accessory for vacuum cleaners |
US11564544B2 (en) | 2020-01-28 | 2023-01-31 | New Ermes Europe S.R.L. | Adapter device for a cordless electric vacuum cleaner |
USD953673S1 (en) | 2020-02-17 | 2022-05-31 | New Ermes Europe S.R.L. | Head of a vacuum cleaner |
Also Published As
Publication number | Publication date |
---|---|
CN107260065A (en) | 2017-10-20 |
ITUA20162159A1 (en) | 2017-10-01 |
ES2741829T3 (en) | 2020-02-12 |
DK3225145T3 (en) | 2019-08-12 |
HUE045555T2 (en) | 2020-01-28 |
CN107260065B (en) | 2021-09-14 |
EP3225145A3 (en) | 2017-10-18 |
EP3225145B1 (en) | 2019-05-22 |
PL3225145T3 (en) | 2019-11-29 |
EP3225145A2 (en) | 2017-10-04 |
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