US20180014708A1 - Tool for a vacuum cleaner - Google Patents
Tool for a vacuum cleaner Download PDFInfo
- Publication number
- US20180014708A1 US20180014708A1 US15/648,194 US201715648194A US2018014708A1 US 20180014708 A1 US20180014708 A1 US 20180014708A1 US 201715648194 A US201715648194 A US 201715648194A US 2018014708 A1 US2018014708 A1 US 2018014708A1
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- US
- United States
- Prior art keywords
- duct
- helical
- tool
- loop
- vacuum cleaner
- 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
- A47L9/24—Hoses or pipes; Hose or pipe couplings
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/02—Nozzles
- A47L9/06—Nozzles with fixed, e.g. adjustably fixed brushes or the like
- A47L9/0693—Specially shaped nozzles, e.g. for cleaning radiators, tubes, fans or the like; Dusters
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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
- A47L9/24—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
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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
-
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L11/00—Hoses, i.e. flexible pipes
- F16L11/14—Hoses, i.e. flexible pipes made of rigid material, e.g. metal or hard plastics
- F16L11/16—Hoses, i.e. flexible pipes made of rigid material, e.g. metal or hard plastics wound from profiled strips or bands
Definitions
- the present invention relates to a flexible duct for a vacuum cleaner. More specifically, the present invention relates to a flexible duct for a vacuum cleaner tool.
- FIGS. 1 and 2 are examples of flexible crevice tools 100 , 200 that can be used with a vacuum cleaner.
- the tools 100 , 200 are intended to reach into and clean crevices or gaps to be cleaned.
- Both of the tools shown in FIGS. 1 and 2 comprise a flexible duct 300 formed from a pliable casing material 400 which is reinforced by a rigid frame 500 . Any steering force applied to the tool 100 , 200 when it is in a crevice causes the pliable casing material 400 to bend.
- the rigid frame 500 is used to improve the control and steering of the tool in a desired direction, and to prevent the flexible duct 300 from folding over itself or kinking. Folding or kinking of the duct should be prevented as this can restrict the flow of fluid drawn through the tool 100 , 200 , and may also cause damage to the flexible duct 300 .
- the two examples of crevice tools 100 , 200 employ two different types of rigid frames 500 in order to improve control and steering of the tool, and to prevent folding or kinking of the duct.
- a problem with the tool 100 shown in FIG. 1 is that the use of a rigid central spine 600 completely restricts the duct from flexing in a particular direction, i.e. the direction of the spine 600 . This could be problematic, for example, if a crevice to be cleaned is an irregular shape since the tool may suffer from reduced manoeuvrability in the crevice.
- the tool 200 shown in FIG. 2 introduces a helical shape frame 700 to improve the flex of the duct.
- the pliable casing material 400 is free to bend and flex in all directions.
- the range of flexibility of the duct 300 and its manoeuvrability in the crevice is therefore improved.
- the duct frames 500 used in the prior art tools 100 , 200 therefore present a compromise between the range of flexibility of the duct 300 and the prevention of folding or kinking of the duct 300 .
- the present invention provides a vacuum cleaner tool comprising a flexible duct, the flexible duct comprising a helical frame comprising a plurality of loops arranged about a helical axis and being formed of a rigid material, and a helical strip provided on the loops to seal the frame and being formed of pliable materia, wherein at least one loop has one or more projections that extend towards an adjacent loop so as to limit flexing of the flexible duct in a direction normal to the helical axis.
- the degree of movement of the flexible duct in directions normal to the helical axis is reduced without being overly constrained.
- This provides the user with more control of the flexible duct in a desired direction of steering, e.g. left/right direction instead of the duct flexing in an up/down direction.
- the risk of the user losing control and causing the duct to fold or kink is also reduced since the projections on a loop restrict the amount of movement of the duct in an undesired direction. Consequently, this enables the duct to maintain a high degree of flexibility and manoeuvrability, whilst also reducing the risk of the duct folding or kinking.
- the restriction of movement also has the additional benefit of reducing the risk of damage caused to the flexible duct by preventing over-flexing in a particular direction.
- the duct In terms of the flexing movement, the duct can be said to flex in a left-right direction and in an up-down direction normal to the helical axis.
- the projections on the loops can be spaced or positioned such that they limit the overall range of movement of the duct in both the left-right direction and the up-down direction. Conversely, they can be arranged so that they restrict the range of movement of the duct predominantly in one direction normal to the helical axis (i.e. either left/right or up/down), relative to the range of movement of the tool in the other direction.
- the cross section of the flexible duct may be a general rectangular shape, comprising two longer side surfaces connected by shorter top and bottom surfaces.
- the general rectangular shape of the flexible duct allows for a narrow profile crevice tool that can fit into most gaps and crevices.
- the requirement of a general rectangular shape does not preclude the curving or shaping of the sides of the rectangular duct for aesthetic or ergonomic purposes.
- the projections on the loops may be aligned along the top surface and/or the bottom surface of the flexible duct to limit the movement of the flexible duct in only one direction that is normal to the helical axis, i.e. an up/down direction.
- By limiting the movement of the flexible duct in a single direction the movement of the flexible duct is less restricted in the other directions normal to the helical axis.
- By providing the projections along one of the top or bottom surface the manoeuvrability of the duct can be improved.
- the amount of material used and the complexity of the part can be reduced whilst still providing a reasonable compromise between duct flexibility and the prevention of folding of the duct.
- the projections on the loops however can be provided on both the top surface and the bottom surface of the flexible duct.
- the user's control of the duct is improved and the risk of the duct folding or kinking and/or causing damage to itself can be further reduced.
- some force would be applied in an up or down direction relative to the helical axis as the tool is pressed into the floor of the crevice. It is therefore advantageous to reinforce the duct in this direction to prevent miss-steering of the duct and also folding or damage to the tool.
- the helical strip may have indents provided on the side surfaces of the flexible duct.
- the indents allow for improved flexibility of the duct and also provide a crease for the duct to fold into as it flexes.
- Each loop may comprise a central band with at least one wing, the helical strip being secured to the at least one wing such that the exterior surface of the helical strip is flush with the exterior and/or interior surface of the central band.
- the helical strip is used to seal the space between the rigid frame loops and may be in the form of a single piece of material (such as a ribbon or bandage), or a series of interlinked bands that together provide a sealed duct. In other words, the helical strip is used to link the loops of the helical frame.
- the helical strip may be overmoulded or bonded onto the helical frame.
- the helical strip also can be provided only between the loops of the helical frame, compared to a full sheath that covers both the frame and the space between the loops of a frame.
- the pliable sheaths that are used in the prior art examples are placed over the tool flexible duct to conceal the frame.
- using a single piece of helical strip material means that less material can be used to make a sealed duct.
- the helical strip between the loops can be formed so that it is flush with the central band of each loop. This is in contrast to fitting a sheath over the frame and increasing the profile of the tool.
- the profile of the tool can be reduced so that it can fit into narrower gaps and crevices without comprising manoeuvrability and the ability to control the tool.
- at least part of the helical frame may be uncovered (i.e.
- the helical strip can be used to cover other parts of the loops.
- the wings and the projections on the loops can be concealed by the helical strip.
- having a duct with a smooth internal surface reduces the amount of losses through turbulence as the airflow is drawn through the duct.
- the tool of the present invention may be a telescopic tool comprising a first and second conduit; the first conduit has a narrower profile than the second conduit, the second conduit surrounds the first conduit such that the first conduit slides in and out of the second conduit allowing for extension of the tool, and the flexible duct forms part of the first conduit.
- the use of the flexible duct on a telescopic tool allows for a longer tool that can be placed into gaps or crevices to be cleaned.
- the provision of a rigid conduit together with a conduit having the flexible duct improves the handling and manoeuvrability of the tool since the user can hold onto the rigid conduit and steer to the tool.
- the present invention provides a vacuum cleaner duct comprising a helical frame comprising a plurality of loops arranged about a helical axis and being formed of a rigid material, and a helical strip provided on the loops to seal the frame and being formed of pliable material, wherein at least one loop has one or more projections that extend towards an adjacent loop so as to limit flexing of the duct in a direction normal to the helical axis.
- FIG. 1 is a tool forming part of the prior art
- FIG. 2 is another tool forming part of the prior art
- FIG. 3 is a perspective view of a tool comprising a flexible duct of the present invention.
- FIG. 4 is a perspective view of the flexible duct of the present invention.
- FIG. 5 is an exploded view of the flexible duct of the present invention, with an insert showing the details of the frame;
- FIG. 6 is a top view of the tool of FIG. 3 ;
- FIG. 7 is a plan view of the tool of FIG. 3 .
- FIG. 3 shows a tool 1 comprising a first conduit 2 , a second conduit 3 , a first connector 4 and a second connector 5 .
- the first conduit 2 has a narrower profile than the second conduit 3
- the second conduit 3 surrounds the first conduit 2 such that the first conduit 2 slides in and out of the second conduit 3 , allowing for extension of the tool 1 .
- the first conduit 2 is revealed from the second conduit 3 .
- Such a tool 1 can be said to be telescopic.
- the first conduit 2 is connected at one end to the second conduit 3 and at the opposite end to the first connector 4 .
- the second conduit 3 is connected to the second connector 5 .
- the second connecter 5 is located at the end opposite to where the first conduit 2 connects to the second conduit 3 .
- the first connector 4 can be used for connecting a nozzle or cleaner head to the end of the tool 1 . Alternatively, the first connector 4 can act as an inlet for the tool without the need for a nozzle or cleaner head attachment.
- the second connector 5 is used to connect the tool 1 to a wand or hose that further connects to a vacuum cleaner.
- the tool 1 further comprises locking means 6 for locking the conduits 2 , 3 of the tool 1 out at maximum extension (as shown in FIG. 3 ) and also for locking the first conduit 2 in a retracted position when it is located within the second conduit 3 .
- the first conduit 2 comprises a flexible portion or duct 7 and rigid portions 8 at either end of the flexible duct 7 .
- the flexible duct 7 is shown in more detail in FIGS. 4 to 7 and comprises a helical frame 9 and a helical strip 10 .
- the flexible duct 7 has a generally rectangular shape cross section, with two longer side surfaces 11 , 12 (best shown in FIG. 6 ) and two shorter top and bottom surfaces 13 , 14 (best shown in FIG. 7 ).
- the flexible duct 7 can flex in directions normal to the helical axis 15 .
- the flexible duct 7 is free to flex in a left to right direction, and also in an up and down direction, as shown in FIGS. 6 and 7 respectively. Dashed lines are used to illustrate the general degree of movement of the flexible duct 7 in directions normal to the helical axis 15 .
- the helical frame 9 is formed of a single piece of rigid material and comprises a plurality of loops 16 that are arranged around the helical axis 15 .
- the loops 16 are spaced at regular intervals along the helical axis 15 with a space between each loop 16 .
- the profile of each loop 16 is shown in more detail in FIG. 5 .
- Each loop 16 comprises a central band 17 flanked by wings 18 , 19 on either side of the band 17 , the band 17 being of greater thickness than the wings 18 , 19 . That is to say that the height of the wings 18 , 19 is less than the height of the central band 17 in a direction normal to the helical axis 15 .
- Each wing 18 , 19 extends all the way around the central band 17 in a direction parallel with the helical axis 15 and is provided with anchors 20 which are used as keying features during the manufacturing process of the tool 1 .
- One wing 19 is provided with two projections 21 that extend towards an adjacent loop 16 .
- the projections 21 extend in a direction that is parallel to the helical axis 15 .
- the projections 21 are positioned on the top and bottom of the wing 19 (best shown in FIG. 5 ).
- the projections 21 act to restrict the movement of the flexible portion 7 in the up and down direction relative to the movement of the flexible portion 7 in the left to right direction.
- the helical strip 10 is formed of a single piece of a pliable material in the form of a tape, bandage or ribbon.
- the helical strip 10 extends along the helical axis 15 and around part of the helical frame 9 .
- the helical strip 10 is either overmoulded onto or bonded to the helical frame 9 such that the strip 10 fills the space between each of the loops 16 , providing a continuous coupling between the loops 16 of the frame.
- the helical strip 10 seals the spaces in the helical frame 9 to provide a duct for fluid to be drawn through.
- the helical strip 10 is provided between the loops 16 only on the wings 18 , 19 , such that the exterior of the helical strip 10 is flush with the exterior of the central band 17 .
- the central band 17 of each loop 16 is exposed along the length of the duct 7 . Since the helical strip 10 is provided in the space between the loops 16 and flush with the loops 16 the overall exterior profile of the flexible duct 7 is reduced.
- the helical strip 10 is able to flex and stretch, allowing the flexible portion 7 to bend or twist from a straight position and return back to its original shape.
- the helical strip 10 has indents 22 provided on the side surfaces 11 , 12 of the duct 7 .
- the indents 22 improve the flexibility of the duct 7 in two ways. Firstly, the indents 22 reduce the stiffness of the helical strip 10 on a side surface 11 , 12 that lengthens during a flexing movement (that is to say, the side surface 11 , 12 on the outside of the bend of the flexible duct portion 7 ).
- the indents 22 allow for the material of the helical strip 10 to crease and fold more readily on a side surface 11 , 12 that contracts during a flexing movement (that is to say, on the side surface 11 , 12 on the inside of the bend of the flexible duct portion 7 ).
- the anchors 20 provided on the wings 18 , 19 of each loop 16 of the frame 9 act as keying features as the strip 10 is overmoulded onto the frame 9 .
- the pliable material flows over the wings 18 , 19 and into or onto the anchors 20 .
- the anchors 20 are holes that are shaped so that the helical strip 10 is secured onto the frame 9 once the pliable material has cured.
- the pliable material is only provided on the wings 18 , 19 such that, once cured, the exterior surface of the helical strip 10 is flush with the exterior of the central band 17 .
- a mould insert can be placed inside the flexible portion 7 of the first conduit 2 and against the inside surface of the loops 16 such that the pliable material flows and cures against the mould insert. The mould insert is then removed after curing to leave behind a smooth interior surface of the duct 7 as the helical strip 10 is cured flush with the interior profile of the loops 16 .
- the tool 1 is extended so that the first conduit 2 is exposed as it slides outs of the second conduit 3 .
- the travel of the first conduit 2 is locked when the tool 1 is in an extended position (as shown in FIG. 3 ).
- the profile of the tool 1 is such that at least the first conduit 2 can be placed into a gap or crevice.
- the user can manoeuvre the tool 1 by holding either the second conduit 3 , or by holding an extension wand or handle connected via the second connector 5 .
- the flexible duct 7 of the first conduit 2 can bend or flex against the walls or floor of the crevice.
- the user will naturally force the tool 1 against the surface/floor of the crevice to be cleaned.
- the flexible duct 7 will flex in an up/down and/or left/right direction.
- the projections 21 limit the range of movement of the helical frame 9 . This improves the control of the tool 1 and gives the user the ability to steer the tool 1 in a crevice without the duct 7 flexing in an unwanted direction (i.e. up/down direction).
- the movement of the flexible duct 7 in the left and right direction is improved by the indents 21 that are provided on the side surfaces of the helical strip 10 .
- the indents 21 provide improved flexibility, in that they are able to stretch more easily than the rest of the helical strip 10 since less material is present.
- the indents 21 provide a crease or fold for the helical strip 10 to bend into when flexing the duct 7 .
- the steering of the tool 1 in a left/right direction is easier relative to steering in an up/down direction.
- the flexible duct 7 is shown as part of a tool 1 for a vacuum cleaner, it will be appreciated that such a duct could be used on other parts of the vacuum cleaner, such as a suitable replacement for a hose, or a tube, or a conduit connecting parts of a vacuum cleaner.
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- Engineering & Computer Science (AREA)
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- Electric Vacuum Cleaner (AREA)
Abstract
A vacuum cleaner flexible duct. The flexible duct includes a helical frame and a helical strip. The helical frame includes a plurality of loops arranged about a helical axis and is formed of a rigid material. The helical strip is provided on the helical frame to seal the flexible duct and is formed of pliable material and. At least one loop of the helical frame has one or more projections that extend towards an adjacent loop. The projections limit the flexing of the flexible duct in a direction normal to the helical axis.
Description
- This application claims the priority of United Kingdom Application No. 1612134.5, filed Jul. 13, 2016, the entire contents of which are incorporated herein by reference.
- The present invention relates to a flexible duct for a vacuum cleaner. More specifically, the present invention relates to a flexible duct for a vacuum cleaner tool.
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FIGS. 1 and 2 are examples offlexible crevice tools tools FIGS. 1 and 2 comprise aflexible duct 300 formed from apliable casing material 400 which is reinforced by arigid frame 500. Any steering force applied to thetool pliable casing material 400 to bend. Therigid frame 500 is used to improve the control and steering of the tool in a desired direction, and to prevent theflexible duct 300 from folding over itself or kinking. Folding or kinking of the duct should be prevented as this can restrict the flow of fluid drawn through thetool flexible duct 300. - The two examples of
crevice tools rigid frames 500 in order to improve control and steering of the tool, and to prevent folding or kinking of the duct. A problem with thetool 100 shown inFIG. 1 is that the use of a rigid central spine 600 completely restricts the duct from flexing in a particular direction, i.e. the direction of the spine 600. This could be problematic, for example, if a crevice to be cleaned is an irregular shape since the tool may suffer from reduced manoeuvrability in the crevice. - The
tool 200 shown inFIG. 2 introduces ahelical shape frame 700 to improve the flex of the duct. Thepliable casing material 400 is free to bend and flex in all directions. The range of flexibility of theduct 300 and its manoeuvrability in the crevice is therefore improved. However, there is still a risk that thepliable casing material 400 could still fold or kink if the regular rotations of thehelical frame 700 are spaced too far apart or if the material used for thehelical frame 700 is too flexible. Theduct frames 500 used in theprior art tools duct 300 and the prevention of folding or kinking of theduct 300. - In a first aspect, the present invention provides a vacuum cleaner tool comprising a flexible duct, the flexible duct comprising a helical frame comprising a plurality of loops arranged about a helical axis and being formed of a rigid material, and a helical strip provided on the loops to seal the frame and being formed of pliable materia, wherein at least one loop has one or more projections that extend towards an adjacent loop so as to limit flexing of the flexible duct in a direction normal to the helical axis.
- By providing a projection on at least one of the loops of the helical frame, the degree of movement of the flexible duct in directions normal to the helical axis is reduced without being overly constrained. This provides the user with more control of the flexible duct in a desired direction of steering, e.g. left/right direction instead of the duct flexing in an up/down direction. The risk of the user losing control and causing the duct to fold or kink is also reduced since the projections on a loop restrict the amount of movement of the duct in an undesired direction. Consequently, this enables the duct to maintain a high degree of flexibility and manoeuvrability, whilst also reducing the risk of the duct folding or kinking. The restriction of movement also has the additional benefit of reducing the risk of damage caused to the flexible duct by preventing over-flexing in a particular direction.
- In terms of the flexing movement, the duct can be said to flex in a left-right direction and in an up-down direction normal to the helical axis. The projections on the loops can be spaced or positioned such that they limit the overall range of movement of the duct in both the left-right direction and the up-down direction. Conversely, they can be arranged so that they restrict the range of movement of the duct predominantly in one direction normal to the helical axis (i.e. either left/right or up/down), relative to the range of movement of the tool in the other direction.
- The cross section of the flexible duct may be a general rectangular shape, comprising two longer side surfaces connected by shorter top and bottom surfaces. The general rectangular shape of the flexible duct allows for a narrow profile crevice tool that can fit into most gaps and crevices. The requirement of a general rectangular shape does not preclude the curving or shaping of the sides of the rectangular duct for aesthetic or ergonomic purposes.
- The projections on the loops may be aligned along the top surface and/or the bottom surface of the flexible duct to limit the movement of the flexible duct in only one direction that is normal to the helical axis, i.e. an up/down direction. By limiting the movement of the flexible duct in a single direction the movement of the flexible duct is less restricted in the other directions normal to the helical axis. By providing the projections along one of the top or bottom surface the manoeuvrability of the duct can be improved. In addition, the amount of material used and the complexity of the part can be reduced whilst still providing a reasonable compromise between duct flexibility and the prevention of folding of the duct. The projections on the loops however can be provided on both the top surface and the bottom surface of the flexible duct. By having projections on the top and the bottom surfaces of the duct the user's control of the duct is improved and the risk of the duct folding or kinking and/or causing damage to itself can be further reduced. For example, if the tool is used to clean a regularly shaped gap or crevice, some force would be applied in an up or down direction relative to the helical axis as the tool is pressed into the floor of the crevice. It is therefore advantageous to reinforce the duct in this direction to prevent miss-steering of the duct and also folding or damage to the tool.
- The helical strip may have indents provided on the side surfaces of the flexible duct. The indents allow for improved flexibility of the duct and also provide a crease for the duct to fold into as it flexes.
- Each loop may comprise a central band with at least one wing, the helical strip being secured to the at least one wing such that the exterior surface of the helical strip is flush with the exterior and/or interior surface of the central band. The helical strip is used to seal the space between the rigid frame loops and may be in the form of a single piece of material (such as a ribbon or bandage), or a series of interlinked bands that together provide a sealed duct. In other words, the helical strip is used to link the loops of the helical frame. The helical strip may be overmoulded or bonded onto the helical frame. The helical strip also can be provided only between the loops of the helical frame, compared to a full sheath that covers both the frame and the space between the loops of a frame.
- The pliable sheaths that are used in the prior art examples are placed over the tool flexible duct to conceal the frame. In contrast to these sheaths, using a single piece of helical strip material means that less material can be used to make a sealed duct. In addition, the helical strip between the loops can be formed so that it is flush with the central band of each loop. This is in contrast to fitting a sheath over the frame and increasing the profile of the tool. Thus, the profile of the tool can be reduced so that it can fit into narrower gaps and crevices without comprising manoeuvrability and the ability to control the tool. Although at least part of the helical frame may be uncovered (i.e. the central band of each loop may appear exposed), the helical strip can be used to cover other parts of the loops. For instance, the wings and the projections on the loops can be concealed by the helical strip. Furthermore, having a duct with a smooth internal surface reduces the amount of losses through turbulence as the airflow is drawn through the duct.
- The tool of the present invention may be a telescopic tool comprising a first and second conduit; the first conduit has a narrower profile than the second conduit, the second conduit surrounds the first conduit such that the first conduit slides in and out of the second conduit allowing for extension of the tool, and the flexible duct forms part of the first conduit. The use of the flexible duct on a telescopic tool allows for a longer tool that can be placed into gaps or crevices to be cleaned. Furthermore, the provision of a rigid conduit together with a conduit having the flexible duct improves the handling and manoeuvrability of the tool since the user can hold onto the rigid conduit and steer to the tool.
- In a second aspect, the present invention provides a vacuum cleaner duct comprising a helical frame comprising a plurality of loops arranged about a helical axis and being formed of a rigid material, and a helical strip provided on the loops to seal the frame and being formed of pliable material, wherein at least one loop has one or more projections that extend towards an adjacent loop so as to limit flexing of the duct in a direction normal to the helical axis.
- In order that the present invention may be more readily understood, an embodiment of the invention will now be described, by way of example, with reference to the accompanying drawings, in which:
-
FIG. 1 is a tool forming part of the prior art; -
FIG. 2 is another tool forming part of the prior art; -
FIG. 3 is a perspective view of a tool comprising a flexible duct of the present invention; -
FIG. 4 is a perspective view of the flexible duct of the present invention; -
FIG. 5 is an exploded view of the flexible duct of the present invention, with an insert showing the details of the frame; -
FIG. 6 is a top view of the tool ofFIG. 3 ; and -
FIG. 7 is a plan view of the tool ofFIG. 3 . -
FIG. 3 shows a tool 1 comprising afirst conduit 2, a second conduit 3, afirst connector 4 and a second connector 5. Thefirst conduit 2 has a narrower profile than the second conduit 3, and the second conduit 3 surrounds thefirst conduit 2 such that thefirst conduit 2 slides in and out of the second conduit 3, allowing for extension of the tool 1. When the tool 1 is extended, thefirst conduit 2 is revealed from the second conduit 3. Such a tool 1 can be said to be telescopic. - The
first conduit 2 is connected at one end to the second conduit 3 and at the opposite end to thefirst connector 4. The second conduit 3 is connected to the second connector 5. The second connecter 5 is located at the end opposite to where thefirst conduit 2 connects to the second conduit 3. Thefirst connector 4 can be used for connecting a nozzle or cleaner head to the end of the tool 1. Alternatively, thefirst connector 4 can act as an inlet for the tool without the need for a nozzle or cleaner head attachment. The second connector 5 is used to connect the tool 1 to a wand or hose that further connects to a vacuum cleaner. - The tool 1 further comprises locking means 6 for locking the
conduits 2,3 of the tool 1 out at maximum extension (as shown inFIG. 3 ) and also for locking thefirst conduit 2 in a retracted position when it is located within the second conduit 3. - The
first conduit 2 comprises a flexible portion orduct 7 andrigid portions 8 at either end of theflexible duct 7. Theflexible duct 7 is shown in more detail inFIGS. 4 to 7 and comprises ahelical frame 9 and ahelical strip 10. Theflexible duct 7 has a generally rectangular shape cross section, with two longer side surfaces 11,12 (best shown inFIG. 6 ) and two shorter top andbottom surfaces 13,14 (best shown inFIG. 7 ). Theflexible duct 7 can flex in directions normal to thehelical axis 15. For example, theflexible duct 7 is free to flex in a left to right direction, and also in an up and down direction, as shown inFIGS. 6 and 7 respectively. Dashed lines are used to illustrate the general degree of movement of theflexible duct 7 in directions normal to thehelical axis 15. - The
helical frame 9 is formed of a single piece of rigid material and comprises a plurality ofloops 16 that are arranged around thehelical axis 15. Theloops 16 are spaced at regular intervals along thehelical axis 15 with a space between eachloop 16. The profile of eachloop 16 is shown in more detail inFIG. 5 . Eachloop 16 comprises acentral band 17 flanked bywings band 17, theband 17 being of greater thickness than thewings wings central band 17 in a direction normal to thehelical axis 15. Eachwing central band 17 in a direction parallel with thehelical axis 15 and is provided withanchors 20 which are used as keying features during the manufacturing process of the tool 1. Onewing 19 is provided with twoprojections 21 that extend towards anadjacent loop 16. Theprojections 21 extend in a direction that is parallel to thehelical axis 15. Theprojections 21 are positioned on the top and bottom of the wing 19 (best shown inFIG. 5 ). Theprojections 21 act to restrict the movement of theflexible portion 7 in the up and down direction relative to the movement of theflexible portion 7 in the left to right direction. - The
helical strip 10 is formed of a single piece of a pliable material in the form of a tape, bandage or ribbon. Thehelical strip 10 extends along thehelical axis 15 and around part of thehelical frame 9. Specifically, thehelical strip 10 is either overmoulded onto or bonded to thehelical frame 9 such that thestrip 10 fills the space between each of theloops 16, providing a continuous coupling between theloops 16 of the frame. Thehelical strip 10 seals the spaces in thehelical frame 9 to provide a duct for fluid to be drawn through. Furthermore, thehelical strip 10 is provided between theloops 16 only on thewings helical strip 10 is flush with the exterior of thecentral band 17. As shown inFIG. 4 , thecentral band 17 of eachloop 16 is exposed along the length of theduct 7. Since thehelical strip 10 is provided in the space between theloops 16 and flush with theloops 16 the overall exterior profile of theflexible duct 7 is reduced. - The
helical strip 10 is able to flex and stretch, allowing theflexible portion 7 to bend or twist from a straight position and return back to its original shape. Thehelical strip 10 hasindents 22 provided on the side surfaces 11, 12 of theduct 7. Theindents 22 improve the flexibility of theduct 7 in two ways. Firstly, theindents 22 reduce the stiffness of thehelical strip 10 on aside surface 11, 12 that lengthens during a flexing movement (that is to say, theside surface 11, 12 on the outside of the bend of the flexible duct portion 7). Secondly, theindents 22 allow for the material of thehelical strip 10 to crease and fold more readily on aside surface 11, 12 that contracts during a flexing movement (that is to say, on theside surface 11, 12 on the inside of the bend of the flexible duct portion 7). - The
anchors 20 provided on thewings loop 16 of theframe 9 act as keying features as thestrip 10 is overmoulded onto theframe 9. During manufacture, the pliable material flows over thewings anchors 20. Theanchors 20 are holes that are shaped so that thehelical strip 10 is secured onto theframe 9 once the pliable material has cured. The pliable material is only provided on thewings helical strip 10 is flush with the exterior of thecentral band 17. In addition, a mould insert can be placed inside theflexible portion 7 of thefirst conduit 2 and against the inside surface of theloops 16 such that the pliable material flows and cures against the mould insert. The mould insert is then removed after curing to leave behind a smooth interior surface of theduct 7 as thehelical strip 10 is cured flush with the interior profile of theloops 16. - During use, the tool 1 is extended so that the
first conduit 2 is exposed as it slides outs of the second conduit 3. The travel of thefirst conduit 2 is locked when the tool 1 is in an extended position (as shown inFIG. 3 ). The profile of the tool 1 is such that at least thefirst conduit 2 can be placed into a gap or crevice. The user can manoeuvre the tool 1 by holding either the second conduit 3, or by holding an extension wand or handle connected via the second connector 5. - As the tool 1 is manoeuvred into a crevice, the
flexible duct 7 of thefirst conduit 2 can bend or flex against the walls or floor of the crevice. The user will naturally force the tool 1 against the surface/floor of the crevice to be cleaned. As the force is applied, theflexible duct 7 will flex in an up/down and/or left/right direction. As theduct 7 bends or flexes in the up down direction, theprojections 21 limit the range of movement of thehelical frame 9. This improves the control of the tool 1 and gives the user the ability to steer the tool 1 in a crevice without theduct 7 flexing in an unwanted direction (i.e. up/down direction). In addition, prevents the flexing of theduct 7 beyond a point where damage or kinking would occur. Thus, although the maximum range in movement in the up and down direction is decreased, theduct 7 is protected against folding or kinking, and also reinforced to prevent any damage to the tool 1. - The movement of the
flexible duct 7 in the left and right direction is improved by theindents 21 that are provided on the side surfaces of thehelical strip 10. In use, theindents 21 provide improved flexibility, in that they are able to stretch more easily than the rest of thehelical strip 10 since less material is present. In addition, theindents 21 provide a crease or fold for thehelical strip 10 to bend into when flexing theduct 7. Thus, the steering of the tool 1 in a left/right direction is easier relative to steering in an up/down direction. - Although the
flexible duct 7 is shown as part of a tool 1 for a vacuum cleaner, it will be appreciated that such a duct could be used on other parts of the vacuum cleaner, such as a suitable replacement for a hose, or a tube, or a conduit connecting parts of a vacuum cleaner.
Claims (13)
1. A vacuum cleaner tool comprising a flexible duct, the flexible duct comprising:
a helical frame comprising a plurality of loops arranged about a helical axis and being formed of a rigid material; and
a helical strip provided on the loops to seal the frame and being formed of pliable material;
wherein at least one loop has one or more projections that extend towards an adjacent loop so as to limit flexing of the flexible duct in a direction normal to the helical axis.
2. The vacuum cleaner tool of claim 1 , wherein a cross section of the flexible duct is a rectangular shape, comprising two longer side surfaces connected by shorter top and bottom surfaces.
3. The vacuum cleaner tool of claim 2 , wherein the projections located on the loop are provided along at least one of the top surface and the bottom surface of the loop to limit movement of the flexible duct in at least one of an up and a down direction only.
4. The vacuum cleaner tool of claim 3 , wherein the projections located on the loop are provided on both the top surface and the bottom surface of the loop.
5. The vacuum cleaner tool of claim 2 , wherein the helical strip has indents provided on the side surfaces of the flexible duct.
6. The vacuum cleaner tool of claim 1 , wherein each loop comprises a central band with at least one wing, the helical strip is secured to the at least one wing such that the exterior surface of the helical strip is flush with at least one of an exterior and an interior surface of the central band.
7. The vacuum cleaner tool of claim 1 , wherein the tool is a telescopic tool comprising a first conduit and a second conduit;
the first conduit has a narrower profile than the second conduit, the second conduit surrounds the first conduit such that the first conduit slides in and out of the second conduit allowing for extension of the tool, and the flexible duct forms part of the first conduit.
8. A vacuum cleaner duct comprising:
a helical frame comprising a plurality of loops arranged about a helical axis and being formed of a rigid material; and
a helical strip provided on the loops to seal the frame and being formed of pliable material;
wherein at least one loop has one or more projections that extend towards an adjacent loop so as to limit flexing of the duct in a direction normal to the helical axis.
9. The vacuum cleaner duct of claim 8 , wherein a cross section of the flexible duct is a rectangular shape, comprising two longer side surfaces connected by shorter top and bottom surfaces.
10. The vacuum cleaner duct of claim 9 , wherein the projections located on the loop are provided along at least one of the top surface and the bottom surface of the loop to limit movement of the duct in at least one of an up and a down direction only.
11. The vacuum cleaner duct of claim 10 , wherein the projections located on the loop are provided on both the top surface and the bottom surface of the loop.
12. The vacuum cleaner duct of claim 8 , wherein the helical strip has indents provided on the side surfaces of the duct.
13. The vacuum cleaner tool of claim 8 , wherein each loop comprises a central band with at least one wing, the helical strip is provided over the at least one wing such that the exterior surface of the helical strip is flush with at least one of an exterior and an interior surface of the central band.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1612134.5 | 2016-07-13 | ||
GB1612134.5A GB2552183B (en) | 2016-07-13 | 2016-07-13 | A tool for a vacuum cleaner |
Publications (1)
Publication Number | Publication Date |
---|---|
US20180014708A1 true US20180014708A1 (en) | 2018-01-18 |
Family
ID=56890973
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US15/648,194 Abandoned US20180014708A1 (en) | 2016-07-13 | 2017-07-12 | Tool for a vacuum cleaner |
Country Status (5)
Country | Link |
---|---|
US (1) | US20180014708A1 (en) |
JP (1) | JP2018008058A (en) |
CN (1) | CN107616749A (en) |
GB (1) | GB2552183B (en) |
WO (1) | WO2018011543A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20190038098A1 (en) * | 2017-08-02 | 2019-02-07 | Sharkninja Operating, Llc | Flexible hose with compact storage configuration and a cleaning apparatus using the same |
US11937762B2 (en) | 2019-06-26 | 2024-03-26 | Milwaukee Electric Tool Corporation | Vacuum tools |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2552184B (en) * | 2016-07-13 | 2018-12-05 | Dyson Technology Ltd | A tool for a vacuum cleaner |
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US6394143B1 (en) * | 1999-11-10 | 2002-05-28 | Plastiflex Belgium | Flexible hose |
US20040244858A1 (en) * | 2001-07-24 | 2004-12-09 | In-Seon Jeong | Spiral hose using polyethylene |
JP2013198701A (en) * | 2012-03-26 | 2013-10-03 | Toshiba Corp | Vacuum cleaner and attachment thereof |
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US2068496A (en) * | 1934-01-05 | 1937-01-19 | Electrolux Corp | Suction nozzle |
US2913011A (en) * | 1956-10-01 | 1959-11-17 | Dayton Rubber Company | Flexible conduit |
US3058493A (en) * | 1959-02-11 | 1962-10-16 | Porter Co Inc H K | Flexible reinforced corrugated hose |
JPH01307589A (en) * | 1988-06-01 | 1989-12-12 | Matsushita Electric Works Ltd | Air supply duct |
JP4441039B2 (en) * | 2000-02-07 | 2010-03-31 | 前澤化成工業株式会社 | Flexible tube |
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US20070209144A1 (en) * | 2006-03-10 | 2007-09-13 | Bissell Homecare, Inc. | Vacuum cleaner with improved hygenic performance |
JP2007263214A (en) * | 2006-03-28 | 2007-10-11 | Toyoda Gosei Co Ltd | Suction hose |
JP4773241B2 (en) * | 2006-03-28 | 2011-09-14 | 日立アプライアンス株式会社 | Vacuum cleaner and floor suction tool |
JP2008090085A (en) * | 2006-10-03 | 2008-04-17 | Jimbo Electric Co Ltd | Flexible tube for passing optical fiber cable through |
US8296901B2 (en) * | 2008-01-24 | 2012-10-30 | Euro-Pro Operating Llc | Reconfigurable airflow wand |
US8533907B2 (en) * | 2009-01-06 | 2013-09-17 | Emerson Electric Co. | Flexible crevice tool attachment for vacuum appliances |
JP2011125585A (en) * | 2009-12-21 | 2011-06-30 | Tigers Polymer Corp | Hose for vacuum cleaner |
US10646085B2 (en) * | 2013-10-11 | 2020-05-12 | Nicholas VATALARO | Flexible vacuum nozzle and nozzle opening |
JP6533947B2 (en) * | 2014-08-06 | 2019-06-26 | パナソニックIpマネジメント株式会社 | Suction tool and vacuum cleaner using the same |
-
2016
- 2016-07-13 GB GB1612134.5A patent/GB2552183B/en not_active Expired - Fee Related
-
2017
- 2017-06-14 WO PCT/GB2017/051731 patent/WO2018011543A1/en active Application Filing
- 2017-07-05 JP JP2017131739A patent/JP2018008058A/en active Pending
- 2017-07-12 US US15/648,194 patent/US20180014708A1/en not_active Abandoned
- 2017-07-13 CN CN201710570011.7A patent/CN107616749A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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US6394143B1 (en) * | 1999-11-10 | 2002-05-28 | Plastiflex Belgium | Flexible hose |
US20040244858A1 (en) * | 2001-07-24 | 2004-12-09 | In-Seon Jeong | Spiral hose using polyethylene |
JP2013198701A (en) * | 2012-03-26 | 2013-10-03 | Toshiba Corp | Vacuum cleaner and attachment thereof |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
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US20190038098A1 (en) * | 2017-08-02 | 2019-02-07 | Sharkninja Operating, Llc | Flexible hose with compact storage configuration and a cleaning apparatus using the same |
US10986970B2 (en) * | 2017-08-02 | 2021-04-27 | Sharkninja Operating Llc | Flexible hose with compact storage configuration and a cleaning apparatus using the same |
US11839347B2 (en) | 2017-08-02 | 2023-12-12 | Sharkninja Operating Llc | Flexible hose with compact storage configuration and a cleaning apparatus using the same |
US11937762B2 (en) | 2019-06-26 | 2024-03-26 | Milwaukee Electric Tool Corporation | Vacuum tools |
Also Published As
Publication number | Publication date |
---|---|
CN107616749A (en) | 2018-01-23 |
WO2018011543A1 (en) | 2018-01-18 |
GB201612134D0 (en) | 2016-08-24 |
GB2552183B (en) | 2018-12-05 |
GB2552183A (en) | 2018-01-17 |
JP2018008058A (en) | 2018-01-18 |
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