EP2621323B1 - A vacuum cleaner - Google Patents

A vacuum cleaner Download PDF

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Publication number
EP2621323B1
EP2621323B1 EP11755427.9A EP11755427A EP2621323B1 EP 2621323 B1 EP2621323 B1 EP 2621323B1 EP 11755427 A EP11755427 A EP 11755427A EP 2621323 B1 EP2621323 B1 EP 2621323B1
Authority
EP
European Patent Office
Prior art keywords
cleaner
wand
stick
vac
cleaner head
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.)
Revoked
Application number
EP11755427.9A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2621323A1 (en
Inventor
Stephen Benjamin Courtney
Peter Gammack
Jonathan George Marsh
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dyson Technology Ltd
Original Assignee
Dyson Technology Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=43243375&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP2621323(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Dyson Technology Ltd filed Critical Dyson Technology Ltd
Publication of EP2621323A1 publication Critical patent/EP2621323A1/en
Application granted granted Critical
Publication of EP2621323B1 publication Critical patent/EP2621323B1/en
Revoked legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • 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
    • A47L5/225—Convertible suction cleaners, i.e. convertible between different types thereof, e.g. from upright suction cleaners to sledge-type suction cleaners
    • 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
    • A47L5/24—Hand-supported suction cleaners
    • 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
    • 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
    • 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

Definitions

  • the present invention relates to the field of vacuum cleaners, and more specifically to "stick-vac" type vacuum cleaners of the general type comprising a handheld vacuum cleaner which is attached to an elongate, rigid wand and which is fluidly connected to a cleaner head provided at the end of the wand.
  • vacuum cleaners there are four types of vacuum cleaner: “upright” vacuum cleaners, “cylinder” cleaners (also referred to as “canister” cleaners), “handheld” vacuum cleaners and “stick” vacuum cleaners, the latter being popularly referred to as “stick-vac” cleaners, or simply “stick-vacs”.
  • Upright cleaners and cylinder cleaners are well known. They tend to be mains-operated and are used for relatively heavy-duty cleaning applications.
  • Handheld vacuum cleaners are relatively small, highly portable vacuum cleaners, best suited to relatively low duty applications such as spot cleaning floors and upholstery in the home, interior cleaning of cars and boats etc. Unlike upright cleaners and cylinder cleaners, they are designed to be carried in the hand during use, and tend to be battery-operated.
  • GB2268875A discloses a vacuum cleaner which is convertible between a hand-held vacuum cleaner and a stick-type vacuum cleaner.
  • the vacuum cleaner comprises a housing, an extensible dirt cup and a floor tool.
  • Stick-vac cleaners essentially offer a lightweight, functional alternative to upright cleaners for relatively low duty floor-cleaning applications, such as cleaning up floor spills.
  • stick-vac cleaner there are two distinct types of stick-vac.
  • the first type is, in a sense, an ultra slim-line upright cleaner, though usually “cordless” rather than mains-operated.
  • An example of this type of stick-vac cleaner is shown in UK Patent Application No. GB2377880A1 , in this case additionally incorporating a removable, handheld vacuum-cleaner.
  • the second type of stick-vac cleaner is a spin-off from the handheld vacuum cleaner, and comprises a handheld vacuum cleaner in combination with a rigid, elongate suction wand which effectively reaches down to the floor so that the user may remain standing while cleaning a floor surface.
  • a floor tool is typically fixedly attached to the end of the rigid, elongate suction wand, or alternatively may be integrated with the bottom end of the wand.
  • Designs of this type of stick-vac cleaner are shown in USD298875 , USD303173 and USD280033 .
  • the handheld suction unit incorporates the motor, the fan and some sort of separating apparatus, which may be a bag or a cyclonic separation system.
  • the present invention relates to stick vac cleaners of the second type.
  • the wand and floor tool are typically conceived and marketed as low-cost accessories for a handheld vacuum cleaner, and as such the functionality of the cleaner in stick vac mode tends to be relatively poor compared to dedicated stick vac cleaners of the first type.
  • a stick-vac cleaner comprising a handheld vacuum cleaner which is attached to an elongate, rigid wand and which is fluidly connected to a cleaner head provided at the end of the wand, characterized in that the cleaner head is connected to the wand via a mechanical steering couple for directionally steering the cleaner head in plane parallel contact with the floor as the wand is rotated about its axis.
  • the manoeuvrability of the stick-vac cleaner is greatly improved compared to conventional stick-vac cleaners of the second general type..
  • any suitable mechanical steering couple may be used.
  • the mechanical steering couple may be configured to constrain the wand and the cleaner head for co-rotation about the wand axis whilst permitting relative rotation of the wand and cleaner head about an axis which is non-parallel to the wand axis.
  • This type of steering couple can be implemented relatively cheaply, whilst still providing a high degree of manoeuvrability for the cleaner.
  • the wand and the cleaner head may be coupled for relative rotation along a rotatable scarf joint or via an elbow joint.
  • the use of a scarf joint is considered to be particularly advantageous, in that it provides a mechanical turning advantage for the cleaner head during steering.
  • the wand may be hingedly connected to the cleaner head passively for varying the lie angle between the wand and the cleaner head.
  • a variable lie angle helps maintain the cleaner head in contact with the floor across a relatively wide range of turning angles during steering of the cleaner head.
  • lie angle is somewhat analogous to the lie angle between the sole of a golf club head and the shaft of the club.
  • this elbow joint may be a hinged elbow joint for varying the lie angle between the cleaner head and the wand.
  • the dust-laden air may be ducted to the handheld vacuum cleaning unit through the wand.
  • the wand thus advantageously serves the dual purpose of fluidly connecting the cleaner head to the hand held vacuum cleaner whilst also transmitting steering torque to the cleaner head.
  • the handheld vacuum cleaner may comprise a pistol grip handle.
  • the provision of a pistol grip handle on the handheld vacuum cleaner is considered to be particularly advantageous in a stick-vac cleaner according to the present invention, because it tends to align a user's forearm with the wand (the wand being analogous to the barrel of a pistol). Consequently, steering of the cleaner can be controlled primarily through supination and pronation of the forearm, which is comfortable and natural for the user.
  • a pistol grip handle also provides good leverage for effective transmission of steering torque between the handle and the cleaner head (via the wand), and in particular reduces the tendency for a user's hand to roll "over the top" of the handle as the handle is rotated to steer the cleaner head.
  • the provision of a straight pistol grip which extends perpendicular to the wand is considered to be particularly beneficial in this regard.
  • a pistol grip handle does not make it essential to use a trigger, though use of a trigger may of course be convenient, for example to switch the handheld cleaner on and off.
  • the handheld vacuum cleaner will comprise some form of motor, which will be a relatively heavy component in the handheld vacuum cleaner.
  • this motor may be positioned at or near the upper end of the pistol grip, so that the weight of the motor may be supported more comfortably on top of the user's hand.
  • the handheld vacuum cleaner may incorporate a cyclonic separation system, in which case the wand may be axially aligned with a tangential inlet to the cyclonic separation system.
  • the dirty air thus feeds directly into the cyclonic separation system along the preferred inlet axis. This reduces “discontinuity" pressure losses between the wand and the separation system, which is particularly advantageous in the present case because of the relatively high pressure drop across the ends of the (relatively long) wand.
  • Figure 1 shows a stick-vac cleaner 1 in use, comprising a handheld vacuum cleaner 3 which is carried in the hand, an elongate wand 5 attached to the handheld cleaner 3 and which reaches down to the floor and a cleaner head 7 provided at the end of the wand 5, which makes contact with the floor (the floor itself, though implicit, is not explicitly shown in Figure 1 ).
  • the handheld vacuum cleaner 3 comprises a motor-driven fan which is arranged inside a motor casing 9 for drawing air in through a suction nozzle 11 positioned at the front of the hand held vacuum cleaner 3.
  • the elongate wand 5 is connected to the suction nozzle 11, and the cleaner head 7 is in turn connected to the lower end of the wand 5.
  • dirty air is drawn in through a suction opening 12 ( Figure 3 ) on the underside of the cleaner head 7 and is ducted to the suction nozzle 11 on the handheld vacuum cleaner 3, through the wand 5.
  • Dirty air entering the suction nozzle 11 passes through a cyclonic separation system 13, where dirt is separated from the air, before the relatively clean air is then exhausted back to atmosphere via one or more fine-particulate filters (not visible).
  • the dirt which is separated from the airflow inside the cyclonic separating system 13 is collected in a bin 15 for disposal.
  • the hand held vacuum cleaner 3 is powered by a multi-cell rechargeable battery which is housed in a battery pack 17.
  • the cleaner head 7 forms part of a floor tool 19 which is detachable from the wand 5 by means of a catch 21.
  • the wand 5 is in turn detachable from the handheld cleaner 3 by means of a catch 23.
  • the handheld cleaner 3 can thus be used in isolation as a stand-alone handheld vacuum cleaner by detaching the wand 5 or, alternatively, the handheld vacuum cleaner 3 and wand 5 can be used in combination as a "long reach" handheld vacuum cleaner by detaching the floor tool 19.
  • the use of a detachable floor tool is not essential: for example, the cleaner head 7 may be permanently secured to the wand 5.
  • the floor tool 19 is shown in more detail in Figure 3 , detached from the wand 5.
  • the floor tool 19 comprises an articulated neck portion 25 which acts as a mechanical steering couple between the wand 5 and the cleaner head 7.
  • the neck portion 25 comprises a front part 27, the front end of which is connected to the cleaner head 7, and a rear part 29, the rear end of which incorporates the catch 21 for detachable connection to the wand 5.
  • the front part 27 is pivotally connected to the rear part 29, so that the front an rear parts 27, 29 are constrained for relative movement about an axis A.
  • the front and rear parts 27, 29 thus effectively form a hinged elbow joint which allows for variation in the lie angle ⁇ between the cleaner head 7 and wand 5 when the floor tool is connected to the wand 5 (see Figure 4 ).
  • the lie angle is adaptable to suit the height of the particular user and, in use, the cleaner can be moved into a lower profile orientation, as desired, for example to clean underneath a bed.
  • a flexible duct in the form of a hose 31 extends through the articulated neck portion 25.
  • the hose 31 flexibly connects the cleaner head 7 to the end of the wand 5 in use so as not to hinder articulation of the neck portion 25 about the axis A.
  • the front end of the front part 27 is shaped as a cylindrical collar 27a.
  • This cylindrical collar 27a is connected to the cylindrical end of a rear outlet duct 7a on the cleaner head 7 by a conventional circlip or snap ring arrangement (not visible in Figure 3 ) which constrains the cleaner head 7 and front part 27 for relative rotation about the axis B of the cylindrical collar 27a.
  • a conventional gasket arrangement (not shown) can be used to form a compression seal between the cleaner head 7 and the neck portion 25; this seal should preferably be a low-friction seal (for example using a PTFE-coated gasket), so as not to hinder free rotation of the cleaner head 7 relative to the neck portion 25.
  • the neck portion 25 functions as a steering couple by constraining the cleaner head 7 and wand 5 for co-rotation about the wand axis C, whilst nevertheless permitting relative rotation of the cleaner head 7 and the front part 27 about the axis B, which in use is non-parallel to the axis C (see Figure 4 ). Accordingly, steering of the cleaner head 7 can be controlled by rotating the wand 5 about the wand axis C to direct the cleaner head 7 in the desired direction.
  • a pair of domed wheels 33 is provided on the front part 27.
  • the domed wheels 33 are mounted on stub axles (not visible) either side of the neck portion 25. These stub axles are each angled downwardly to set the respective wheel at a corresponding fixed, positive camber angle. This camber angle is the same for each of the wheels 33, so that the wheels form a "V" when viewed from the front.
  • the dome-shaped wheels 33 bank accordingly to maintain rolling contact with the floor. The dome-shaped wheels 33 are thus better able to track through the turn than conventional "flat-sided" wheels.
  • the handheld vacuum cleaner 3 is provided with a pistol grip handle 35 (see Figure 2 ), which tends to position a user's forearm parallel to the wand 5. Consequently, steering of the cleaner 1 can be controlled primarily through supination and pronation of the forearm, and is therefore natural and comfortable for the user.
  • a pistol grip also provides good leverage for effective transmission of steering torque from the handle 35 to the cleaner head 7 (via the wand 5 and neck portion 25), and in particular reduces the tendency for a user's hand to roll "over the top" of the handle as the handle is rotated to steer the cleaner head 7.
  • the motor casing 9 is provided at the upper end of the pistol grip handle 35. Consequently, the weight of the motor inside the motor casing 9 is comfortably supported on top of a user's hand during use of the cleaner 1.
  • Figure 5 shows an alternative floor tool 190 which may be connected to the wand 5 in accordance with the invention to provide a mechanical steering couple between the wand 5 and a cleaner head.
  • the floor tool comprises an articulated neck portion 250 which incorporates a front duct part 270 and a rear duct part 290.
  • the front duct part 270 is fluidly connected to a cleaner head 70.
  • the rear duct part 290 is configured to push fit onto the wand 5 (the end of the wand may need to be modified accordingly to accommodate the push fit).
  • the front duct part 270 is pivotally connected to the cleaner head 70 so that the front part 270 and cleaner head 70 are constrained for rotation about an axis D. This allows for variation of the lie angle between the wand 5 and the cleaner head 70 in use.
  • the front duct part 270 is connected to the rear duct part 290 by a rotatable scarf joint 300, which constrains the front duct part 270 and rear duct part 290 for rotation about an axis E, non-parallel with the longitudinal axis of the rear duct part 290.
  • the front duct part 270 and rear duct part 290 together form an air duct for fluidly connecting the cleaner head 70 to the wand 5 in use.
  • the neck portion 250 acts as a mechanical steering couple between the wand 5 and the cleaner head 70 in similar manner to the neck portion 25.
  • the neck portion 250 is arranged to constrain the wand 5 and cleaner head 70 for co-rotation about the wand axis C whilst, nevertheless, permitting relative rotation of the wand 5 and cleaner head 70 about the axis E. Accordingly, as the wand 5 is rotated about the wand axis C, co-rotation of the cleaner head 7 with the wand 5 combines with relative rotation of the front part 270 and rear part 290 to turn the cleaner head 7 in plane parallel contact with the floor.
  • the axis E is non-parallel with the floor, so that relative rotation of the front and rear parts 17, 19 about the axis E involves both a horizontal and vertical component (cf. relative rotation about the axis B in Figure 4 , which is solely in a vertical plane). Consequently, relative rotation of the front part 270 and rear part 290 not only counteracts undesirable banking of the cleaner head during steering, but also provides an associated mechanical advantage in turning the cleaner head 70 left or right, further improving manoeuvrability.
  • Air drawn in through the suction opening on the cleaner head need not be ducted through the wand.
  • the air may be ducted through a flexible hose running alongside the wand; in this arrangement, the wand would nevertheless couple to the cleaner head in similar manner for providing the necessary directional steering capability, so the wand would still physically connect the cleaner head to the handheld vacuum cleaner, but the wand itself need not be hollow.
  • a stick-vac cleaner according to the present invention is considered to offer significantly better manoeuvrability than existing "stick- vacs" of the same general type, bringing the functionality of this type of stick-vac more into line with the stick-vac cleaners of the first general type described above.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Nozzles For Electric Vacuum Cleaners (AREA)
  • Electric Vacuum Cleaner (AREA)
EP11755427.9A 2010-10-01 2011-09-09 A vacuum cleaner Revoked EP2621323B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1016563.7A GB2484146B (en) 2010-10-01 2010-10-01 A vacuum cleaner
PCT/GB2011/051697 WO2012042240A1 (en) 2010-10-01 2011-09-09 A vacuum cleaner

Publications (2)

Publication Number Publication Date
EP2621323A1 EP2621323A1 (en) 2013-08-07
EP2621323B1 true EP2621323B1 (en) 2015-03-11

Family

ID=43243375

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11755427.9A Revoked EP2621323B1 (en) 2010-10-01 2011-09-09 A vacuum cleaner

Country Status (8)

Country Link
US (1) US20120079671A1 (zh)
EP (1) EP2621323B1 (zh)
JP (2) JP2012075904A (zh)
KR (1) KR101506175B1 (zh)
CN (1) CN102440717B (zh)
AU (5) AU2011309890B2 (zh)
GB (1) GB2484146B (zh)
WO (1) WO2012042240A1 (zh)

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WO2017046557A1 (en) 2015-09-17 2017-03-23 Dyson Technology Limited Vacuum cleaner
TWI637716B (zh) * 2016-02-29 2018-10-11 Ｌｇ電子股份有限公司 真空吸塵器

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