Cleaning appliance
A cleaning appliance of the cylinder type comprises a main body and a hose for carrying fluid flow between a wand and the main body. A guide such as a channel is located on the main body for guiding the hose along a sinuous hose storage path around the periphery of the main body. A locator such as a collar aids a user in correctly fitting the hose to the channel. A retainer retains the hose at at least two intermediate points between the ends of the hose. This allows the hose to have a sufficiently large bending radius at each end.
Latest DYSON TECHNOLOGY LIMITED Patents:
This invention relates to a cleaning appliance, such as a vacuum cleaner.
Cleaning appliances such as vacuum cleaners are well known. The majority of vacuum cleaners are either of the ‘upright’ type or of the ‘cylinder’ type (called canister or barrel machines in some countries.) An example of a cylinder vacuum cleaner manufactured by Dyson Limited under the name DC05 (“DC05” is a trade mark of Dyson Limited) is shown in
Cylinder vacuum cleaners generally comprise a main body 10 which contains separating apparatus 11 such as a cyclonic separator or a bag for separating dirt and dust from an incoming dirty airflow. The dirty airflow is introduced to the main body 10 via a suction hose 15 and a wand 16 assembly which is connected to the main body 10. The main body 10 of the cleaner is dragged along by the hose as a user moves around a room. A cleaning tool is attached to the remote end of the hose and wand assembly.
Cylinder vacuum cleaners are often perceived to have a disadvantage of being difficult to store. Although the main body of the cleaner is usually fairly compact, the suction hose and wand can take up a considerable amount of space. One of the reasons for this is that the suction hose has a robust construction which is sufficiently tough to allow the hose to pull the main body along, and to withstand abrasion during use. This robustness can make it difficult to store the suction hose.
There have been various proposals for storing the suction hose of a cylinder type of vacuum cleaner. U.S. Pat. No. 883,413 shows a vacuum cleaner with a cylindrical casing. The long suction hose is stored by coiling it a number of times around the periphery of the casing. An annular trough is provided near the base of the casing to support the lowermost coil of hose and a clip is provided at the top of the casing for supporting the suction nozzle.
U.S. Pat. No. 5,742,976 shows a vacuum cleaner in which the outer circumference of the main body has a groove for receiving a suction hose. When the hose needs to be stored, the hose is placed in the groove and is held in place by virtue of the distal end latching to the main body.
In the vacuum cleaner shown in U.S. Pat. No. 4,563,789, a suction hose is stored on top of the upper face of the cleaner by coiling the hose several times around the upper face. A connector is provided for securing the two ends of the hose together and thus for retaining the hose on the machine.
U.S. Pat. No. 3,170,185, U.S. Pat. No. 3,480,987 and U.S. Pat. No. 3,651,536 show vacuum cleaners where the suction hose is stored within the main body of the vacuum cleaner. While this solution can neatly store the hose, it requires the main body of the machine to have a chamber which is large enough to accommodate all of the suction hose. This has the disadvantage of increasing the size of the main body of the vacuum cleaner and hence making the machine more cumbersome to manipulate during normal use.
A different solution to the problem of storing the suction hose is proposed in EP 1 011 408, where part of the suction hose is stored within the tube which forms the wand.
The present invention seeks to provide an alternative manner of storing the suction hose on a cleaning appliance.
Accordingly, the present invention provides a cleaning appliance of the cylinder type comprising a main body and a hose for carrying fluid to/from the main body, wherein guide means are located on the main body for guiding the hose along a hose storage path which is a sinuous path around the periphery of the main body.
Expressed in another way, the hose storage path is non-planar. The height of the hose storage path, above a base of the main body, varies around the periphery of the main body. The sinuous storage path around the main body has an advantage of increasing the length of hose which can stored around the main body in comparison with a planar coil of hose around the body. This can increase the storage path sufficiently such that the hose only needs to be looped once around the main body. The sinuous path also has an advantage that the hose can be fitted more closely to the main body since the hose storage path follows the regions where storage space exists on the main body. Preferably the hose lies substantially within the envelope of the main body along most of its length, i.e. the hose does not protrude any further beyond the main body than other components, such as the wheels. Preferably, the hose storage path lies above the wheels so that the hose does not need to lie outside the wheels.
Preferably the guide means also retain the hose to the main body. The guide means can retain the hose at at least one, and preferably at least two, intermediate points along the length of the hose.
Although embodiments of the invention are described in detail with reference to a vacuum cleaner, it will be appreciated that the inventions can also be applied to other forms of cleaning appliance. The term “cleaning appliance” is intended to have a broad meaning, and includes a wide range of machines having a main body and a wand for carrying fluid to or from a floor surface. It includes, inter alia, machines which only apply suction to the surface, such as vacuum cleaners (dry, wet and wet/dry variants), so as to draw material from the surface, as well as machines which apply material to the surface, such as polishing/waxing machines, pressure washing machines and shampooing machines.
Embodiments of the invention will now be described with reference to the drawings, in which:
FIGS. 14 to 16 show alternative forms of the wand;
FIGS. 18 to 23 show alternative forms of hose retaining schemes for the vacuum cleaner.
In
A flexible hose 150 and a wand assembly 160 connect to an inlet port 151 on the main body 100. The main body 100 of the cleaner is pulled along by the hose 150 as a user moves around a room. The hose 150 has a construction which is robust enough to withstand this pulling action, and any normal abrasion which may be encountered as the hose rubs against obstacles in a room.
In this embodiment, the air inlet port 151 is centrally mounted on the main body 100 at the forward, lower part of the machine. In alternative embodiments of the machine where the air inlet is not centrally positioned, such as the machine shown in
Ducting on the chassis 110 connects the air inlet port 151 to an inlet to the separating apparatus 120. For a cyclonic separating apparatus 120, the inlet to the separating apparatus is arranged to guide incoming airflow through the wall of the chamber of the cyclonic separator in a tangential manner.
The second end of the hose 150 connects to the wand 160. A suitable wand assembly 160 is described in our co-pending International Patent Application PCT/GB02/00850. As shown in
The distal end of tube 163 has a connector 280 which is adapted to receive a floor tool, such as the floor tool shown 20 in
For ease of storage, and ease of carrying, the wand assembly 160 can be fitted to the main body 100 of the vacuum cleaner, as shown in
As best seen in
As best seen in
Another feature of the locking mechanism is that projection 232 on the actuator member 235 can seat itself in a depression in the wall of tube 161 to lock the position of tube 161. Operating the actuator member 235 raises the projection 232 from its seated position and thus allows tube 161 to be moved. Tube 161 has a series of similar depressions 233 along its length. Projection 232 also serves to secure the tube 161 in a desired extended position with respect to the storage tube 165.
It will be appreciated that operation of the single button 230 simultaneously releases the wand 160 from the main body 100 of the vacuum cleaner, releases the end connector 280 which in turn allows the tubes 161, 162, 163 to be withdrawn from the storage tube 165, and locks tube 161 in a selected extended position.
The method of operating the vacuum cleaner will now be described. To store the wand a user brings the storage tube 165 of the wand assembly, in its fully retracted state, alongside the uppermost face of the main body 100 and engages the hooked projection 220 behind hook 130 on the main body. The user then pivots the storage tube 165 towards the main body so that the catch face 225 engages with the hook 135 on the main body. The inclined shape of the catch face 225 causes the catch ring to move away from the hook 135, against the bias of the spring, as the storage tube is pushed against the main body, and to reseat itself beneath the hook 135. At this point the wand 160 is now fully locked in position on the main body 100 and a user can then use the handle 200 on the storage tube 165 of the wand assembly to carry the vacuum cleaner.
A floor tool can be left in place on the end of the wand 160 or it can be removed and stored elsewhere on the main body 100.
To release the wand 160 from the storage position, a user operates the button 230 to move catch ring 222 and catch face 225. This releases the catch face 225 from the hook 135. The user can then pull the wand 160 away from the main body and slide the wand upwards, to remove the hooked projection 220 from the main body 100.
The position in which a user will naturally feel comfortable grasping the handle 200 to lift and carry the vacuum cleaner is different to the position in which a user will wish to grasp the handle 200 to operate the wand for cleaning. In this embodiment, the handle 200 extends for some distance along the length of, and parallel to, the longitudinal axis of the storage tube 165 so as to provide the user with comfortable, longitudinally offset, positions for both carrying the vacuum cleaner and operating the wand for cleaning. Portion 205 of the handle, adjacent the end of the storage tube 165, is intended to be used to manipulate the wand during normal cleaning. Portion 205 lies at an angle to the longitudinal axis of the storage tube. This angled position, together with the position adjacent the end of the storage tube, has been found to be a comfortable position for manipulating the wand. Portion 208 of the handle is intended to be used to carry the cleaner. Control buttons for operating the vacuum cleaner can be provided in region 207. These controls can include an on/off switch, a suction power control etc. as is well known in the art. A bleed valve 209 is also located near to the part of the handle 205 which is used during cleaning. The bleed valve admits air when the trigger 209 is pulled, so as to reduce the suction force at the remote end of the wand.
The hooked projection 220 on the storage tube 165 and hook 130 on the main body both extend for some distance perpendicularly to the longitudinal axis Y-Y′ of the storage tube 165. This helps to minimise any rotational movement, or wobble, of the wand about its longitudinal axis. While the hooked projection 220 and catch ring 222 adequately secure the wand to the main body 100, it is preferred to add some further features to the wand 160 and the main body for additional security. Ribs 250 extend radially outwardly from each side of the storage tube 165. Ribs 251 also extend outwardly from the upper face of the separating apparatus 120 at positions adjacent to where the storage tube 165 will lie when it is secured to the main body. The ribs serve to minimise any rotation of the storage tube 165 about its longitudinal axis Y-Y′ when the tube is secured to the main body. In short, they minimise ‘wobble’. A second rib 255 projects outwardly from the storage tube 165, perpendicularly to the longitudinal axis Y-Y′ of the storage tube 165. This locates against a similar rib 125 on the main body 100 and serves to minimise movement of the storage tube 165 in the direction of the longitudinal axis of the tube 165.
In this embodiment, the separating apparatus 120 comprises two cylindrical chambers which lie alongside one another on the main body 100. The hooks 130, 135 are formed on the inlet duct structure which lies between the chambers. This allows the wand 160 to fit more snugly against the main body and helps to reduce the amount by which the wand 160 protrudes beyond the envelope of the main body.
The hose 150 can be stored around the main body 100 of the vacuum cleaner. The hose 150 has a length which is sufficient such that, in use, the main body 100 can sit on a floor surface and the user can manipulate the wand at a convenient height, without any excessive drag. In our embodiment the hose has a length of around 1.5 m and a length in the range 1.3-1.8 m is typical. Conveniently, the hose 150 also has a length which is sufficient to lie once around the perimeter of the main body 100. The hose inlet 151 to the main body 100, as well as being centrally located for ease of pulling, lies below the position where the hose end 168 of the wand 160 will lie when the wand 160 is stored on the main body 100. This allows the hose 150 to form one complete perimeter of the main body 100. Hose retaining features 310 on the main body allow the hose 150 to remain attached to the main body 100 during carrying and during storage.
In the embodiment shown in
Along most of its length, channel 300 has a semi-circular shape and a diameter which is just greater than the hose 150 that it retains, as shown in
While a semi-circular shaped channel is preferred, as it provides continuous support around the hose, the channel could have any shape which provides support at a plurality of points around the hose, e.g. a square or other polygonal shaped structure. Alternatively, a set of ribs can project outwardly from the chassis 110 to define supports for the hose 150. The channel 300 can be integrally formed with the remainder of the main body or it can be formed as a separate part which can then be mounted on the main body during assembly of the machine. The channel 300 can be removably mounted to the chassis 110 so that, if a user does not want this feature they can simply remove the channel 300 from the chassis 110.
The hose 150 has a length which is greater than the perimeter of the main body 100. The main reason for this is to allow some slack around the inlet 151 to the main body and at the hose end 168 of the wand 160 since an excessively tight bend in these regions would cause damage to the hose. If the hose 150 were to be stored with a tight bend, it could suffer permanent deformation and kinking. Having a hose 150 which is longer than the perimeter of the chassis 110 can result in a user incorrectly fitting the hose 150 to the main body 110. In particular, a user could fit the hose 150 too tightly to the main body at end 151, which would result in an unacceptably tight bend in this region, leaving a large loop of hose at the other end 168 which could hang below the main body 110. In order to instruct a user where to correctly fit the hose 150, hose 150 is provided with a collar 350 which is wider than the diameter of channel 300. This collar 350 is shown in
Channel 300 has a shape which causes the hose 150 to follow a sinuous path around the main body 100 of the machine. Expressed another way, the hose storage path is non-planar. From
The wand 160 itself will now be described in more detail.
Securing mechanisms 400 are capable of either locking the tubes 161, 162, 163 to one another, as is needed when the tubes are in an extended position, or allowing free movement of the tubes with respect to one another, as is needed when the tubes are being retracted. A securing mechanism 400 is provided at the distal end of tube 161 for securing tube 161 to tube 162 and a further securing mechanism 400 is provided at the distal end of tube 162 for securing tube 162 to tube 163. The securing mechanisms 400 automatically lock the tubes, as they are brought to their fully extended position, and automatically unlock as the tubes are retracted.
The detail of these securing mechanisms is not important to the invention. However, for completeness, one embodiment will now be described with reference to
The securing mechanism 400 comprises a ring 410 which fits around the outside of tube 162. The ring 410 comprises a plurality of arms 459 which are connected to, and extend axially rearwardly from, the ring. Between each arm 459 is an arc-shaped part which fits alongside the outer surface of the tube 162. Each of the arms 459 have a radially inwardly extending projection 454 which locates within an aperture in the wall of the tube 162. The arms 459 are pivotable about the ring and the securing mechanism is manufactured from a material which is sufficiently resilient to permit it to flex outwardly and return to the position shown without breaking.
Tube 163 has an inclined surface 470 which serves to move the projections 454 radially outwards as the tubes are brought into an extended position, the projection seating itself in the aperture 420 in the wall of tube 162 and locking the tubes.
To release the tubes 162, 163, the arms 459 flex radially outwardly, pivoting about the ring. This carries the arm 459 sufficiently radially outwardly such that the projection 454 lies radially outside the aperture 420 in the tube. The forward inclined surface 452 of one securing mechanism 400 presses against the rearward surface 456 of another securing mechanism 400 to cause the arm to move in this radial fashion.
A seal 460 is provided on each tube for sealing against another tube. The seal 260 is located at one end of tube 30 and is secured to the inner surface of the tube. The seal 260 can be bonded or clipped in place.
It is preferable for the wand to be lockable with a range of different overall lengths such that users who differ in their physical dimensions (height, arm length) can comfortably use the wand. To satisfy this requirement, the uppermost tube 161 is provided with a set of locking positions, as shown in
The tubes can be manufactured from a metal such as steel or aluminium, or even a robust plastic material. The tubes are preferably formed from a material of constant thickness, the ridges and channels being formed by shaping the tube. This has the advantage of minimising the weight of the finished product.
In the above embodiment, the securing mechanisms are manufactured from a resiliently flexible material such as a nylon compound. However, an equivalent pivotal movement of the arms can be achieved by manufacturing each arm as a separate part and providing a pivot between each arm and the remainder of the securing mechanism. The resilience of the arm can be achieved by mounting a spring between the arm and the tube or between the arm and a fixed part of the securing mechanism.
While the above described embodiments show the securing mechanisms 400 as being a separate part from the tubes, a securing mechanism could be manufactured integrally with a tube. A plastic securing mechanism could be moulded (or otherwise formed) around a metal tube, or a plastic securing mechanism could be moulded (or otherwise formed) with a plastic tube.
The operation of the wand will now be described. To extend the wand 160, a user holds storage tube 165 by handle 200 and pulls the narrowest tube 163 axially away from the storage tube 165. Each of the tubes 161, 162, 163 slides outwardly from the storage tube 165. As each tube reaches an extended position with respect to another tube, for example, as tube 163 slides towards the position with respect to tube 162 shown in
The procedure for collapsing the wand 160 will now be described. A user firstly operates release button 230 on storage tube 165. This releases the catch 232 from tube 161. A user pushes the distal end of tube 163 axially towards the storage tube 165. This causes tube 161 to slide within storage tube 165. Once tube 161 has been fully retracted inside the storage tube 165 the securing mechanism 400 pushes against the leading edge of the storage tube 165 and causes the arms of the securing mechanism 400 to flex radially outwardly, thus unlocking tube 162 from tube 161. Tube 162 then retracts inside the storage tube 165. The complete wand retraction can be performed in one continuous, swift movement without the need for a user to separately operate each securing mechanism 400.
The wand which is shown here has three separate tubes or stages, in addition to a storage tube 165, but it will be appreciated that the wand could have only two stages or a higher number than three. Each additional stage would have the same type of securing mechanism 400.
Alternatives
Handles
In the previously described embodiment, a single handle 200 is provided which serves for both normal cleaning and carrying. In an alternative embodiment, as shown in
Another alternative is shown in
In another alternative shown in
Wand Storage
In the main embodiment the wand 160 is secured to the main body 100 such that a fairly large proportion of the storage tube 165 of the wand sits above the remainder of the main body 100. It is possible to increase the size of the retaining channel 660 for receiving the wand, as shown in
Hose Storage Channels
The main embodiment described above has a single continuous channel 300 with hose retaining features 310 at each end. There are a number of alternatives to this. As an alternative to providing a single continuous channel 300, there can be multiple, shorter length, channels around the main body. Each of these channels can be provided with a hose retaining function, or just the channels at each end of the set of channels can be provided with this function, the other channels simply serving to define the hose storage path around the main body and to provide a support surface against which the hose 150 can rest, similar to portion 305 of the channel 300.
In an alternative embodiment, the entire channel can have a hose retaining function. Looking again at
The channel can be integrally formed with the remainder of the chassis, as shown in
A preferable enhancement is for each end of the channel to have a flaired cuff. This permits easy insertion of the hose into the channel. Once a first part of the hose has been inserted into the cuff, a user only needs to push the hose inwardly into the channel to prise the leading edges of the channel apart.
The hose retaining function can be achieved with other types of mechanism.
Another form of clip is shown in
Another form of retaining mechanism is shown in
In each of these alternative schemes the clips or rings can be fitted to the main body in the same winding path around the body as the hose storage channel of the main embodiment so as to cause the hose 150 to be stored in a sinuous path around the body.
In a still further alternative scheme, shown in
In each of these embodiments the hose storage path is symmetrical about the longitudinal axis of the main body of the machine. This results from the symmetrical nature of the main body, the machine being symmetrical for good steerability. However, it will be readily understood that there is no need for the storage path on one side to be the same as that on the other side, and the hose storage path can be adapted to fit within available space on each side of the machine.
Hose Location Collar
In the main embodiment, a collar 350 is fitted around the hose 150 to instruct a user where to fit the hose 150 into the retaining channel. The collar 350 is larger than the hose retaining channel 305 or retaining parts 310. It will be appreciated that shapes of collar, other than a cylindrical collar, could be provided, and additional tactile features such as ribs, or bumps, can be added to the outer surface of the collar 350 to aid a user.
In addition to mechanical fittings to the hose 150, there are a range of solutions for visually instructing a user where to fit the hose. These can include a pattern, such as arrows or stripes, or simply coloured markings on the hose. The visual markings can be incorporated into the hose itself or they can be applied after manufacture, such as by applying a label or transfer to the outside of the hose or by painting the hose.
Claims
1. A cleaning appliance of the cylinder type, comprising a main body, a hose for carrying fluid to or from the main body and a guide located on the main body configured for guiding the hose along a hose storage path which is a sinuous path around the periphery of the main body.
2. The cleaning appliance according to claim 1, wherein the height of the hose storage path above a base of the main body varies around the periphery of the main body.
3. The cleaning appliance according to claim 1 or 2, wherein the main body comprises a pair of wheels which are mounted on the sides of the main body and wherein the guide is located on the main body such that the hose storage path lies around at least part of the wheels.
4. The cleaning appliance according to claim 3, wherein the guide is located on the main body such that the hose storage path lies above the wheels.
5. The cleaning appliance according to claim 3, wherein the guide is located on the main body such that the hose storage path is closer to the base of the main body at the front and back of the main body, the hose storage path increasing in height from the base of the main body in the region of the wheels.
6. The cleaning appliance according to claim 1 or 2, wherein the guide is located on the main body such that the hose storage path extends once around the periphery of the main body.
7. The cleaning appliance according to claim 1 or 2, further comprising a first connector for connecting a first end of the hose to the main body and a second connector for connecting the second end of the hose to a wand, and wherein the first connector is located on the main body at a position which is adjacent the position of the second connector when the wand is retained on the main body such that the hose can be stored by wrapping the hose once around the entire periphery of the main body.
8. The cleaning appliance according to claim 1 or 2, further comprising a first connector for connecting a first end of the hose to the main body and a second connector for connecting the second end of the hose to a wand, and wherein the first connector is located on the main body at a position which is at an opposite end of the main body to the position of the second connector when the wand is retained on the main body such that the hose can be stored by wrapping the hose one and a half times around the entire periphery of the main body.
9. The cleaning appliance according to claim 1 or 2, wherein the guide comprises a channel which extends at least part way around the periphery of the main body and defines the hose storage path.
10. The cleaning appliance according to claim 1 or 2, wherein at least part of the guide can also retain the hose on the main body.
11. The cleaning appliance according to claim 10, wherein the guide comprises a channel which extends at least part way around the periphery of the main body and at least one portion of the channel is arranged to retain the hose.
12. The cleaning appliance according to claim 11, wherein each end portion of the channel is arranged to retain the hose.
13. The cleaning appliance according to claim 11, wherein the entire length of the channel is arranged to retain the hose.
14. The cleaning appliance according to claim 10, wherein the guide means comprise at least one clip which is positioned along the hose storage path.
15. The cleaning appliance according to claim 14, wherein the clip is movable between a closed position, in which it retains the hose, and an open position in which it can receive or release the hose.
16. The cleaning appliance according to claim 1 or 2, wherein the guide comprises a set of hooks which are positioned on the inside edge of changes in direction along the hose storage path.
17. The cleaning appliance according to claim 1 or 2, wherein the guide is formed integrally with the main body.
18. The cleaning appliance according to claim 1 or 2, wherein the guide is removably mounted on the main body.
19. The cleaning appliance according to claim 1 or 2, wherein the hose has a length which is greater than the hose storage path around the main body, and wherein the hose comprises a locator that identifies the portion of the hose which is to be retained on the main body.
20. (canceled)
Type: Application
Filed: Aug 21, 2003
Publication Date: Sep 15, 2005
Applicant: DYSON TECHNOLOGY LIMITED (UNITED KINGDON)
Inventor: Emma Heatley (Westonbirt)
Application Number: 10/526,668