U.S. patent application number 10/526668 was filed with the patent office on 2005-09-15 for cleaning appliance.
This patent application is currently assigned to DYSON TECHNOLOGY LIMITED. Invention is credited to Heatley, Emma Jane.
Application Number | 20050198764 10/526668 |
Document ID | / |
Family ID | 9944058 |
Filed Date | 2005-09-15 |
United States Patent
Application |
20050198764 |
Kind Code |
A1 |
Heatley, Emma Jane |
September 15, 2005 |
Cleaning appliance
Abstract
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.
Inventors: |
Heatley, Emma Jane;
(Westonbirt, GB) |
Correspondence
Address: |
MORRISON & FOERSTER LLP
1650 TYSONS BOULEVARD
SUITE 300
MCLEAN
VA
22102
US
|
Assignee: |
DYSON TECHNOLOGY LIMITED
TETBURY HILL MALMESBURY WILTSHIRE SN16 ORP
UNITED KINGDON
GB
|
Family ID: |
9944058 |
Appl. No.: |
10/526668 |
Filed: |
March 4, 2005 |
PCT Filed: |
August 21, 2003 |
PCT NO: |
PCT/GB03/03667 |
Current U.S.
Class: |
15/323 |
Current CPC
Class: |
A47L 9/0036 20130101;
A47L 5/362 20130101 |
Class at
Publication: |
015/323 |
International
Class: |
A47L 005/00; A47L
009/00 |
Foreign Application Data
Date |
Code |
Application Number |
Sep 14, 2002 |
GB |
0221345.2 |
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)
Description
[0001] This invention relates to a cleaning appliance, such as a
vacuum cleaner.
[0002] 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 FIG. 1.
[0003] 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.
[0004] 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.
[0005] 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.
[0006] 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.
[0007] 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.
[0008] 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.
[0009] 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.
[0010] The present invention seeks to provide an alternative manner
of storing the suction hose on a cleaning appliance.
[0011] 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.
[0012] 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.
[0013] 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.
[0014] 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.
[0015] Embodiments of the invention will now be described with
reference to the drawings, in which:
[0016] FIG. 1 shows a conventional vacuum cleaner of the cylinder
type;
[0017] FIG. 2 shows a vacuum cleaner in accordance with an
embodiment of the invention with the flexible hose fitted to the
chassis of the cleaner;
[0018] FIGS. 3A and 3B respectively show a side view and a rear
view of the vacuum cleaner of FIG. 2 with the hose removed;
[0019] FIG. 4 shows the wand of the vacuum cleaner of FIGS. 2, 3A
and 3B in an extended state;
[0020] FIG. 5 shows the wand of FIG. 4 in a retracted state for
storage;
[0021] FIG. 6 is a cross-section through the wand while stored on
the vacuum cleaner of FIG. 2;
[0022] FIG. 7 is a detailed view of the catch on the wand;
[0023] FIG. 8 is a schematic plan view of the vacuum cleaner
showing the storage of the hose;
[0024] FIGS. 9 and 10 are cross-sections of the hose storage
channel;
[0025] FIGS. 11A and 11B show the hose location collar on the
flexible hose;
[0026] FIGS. 12 and 13 show the securing mechanisms on the
wand;
[0027] FIGS. 14 to 16 show alternative forms of the wand;
[0028] FIG. 17 shows an alternative form of the main body of the
vacuum cleaner;
[0029] FIGS. 18 to 23 show alternative forms of hose retaining
schemes for the vacuum cleaner.
[0030] FIG. 2 shows a cleaning appliance in the form of a vacuum
cleaner. The vacuum cleaner has a main body 100 which supports the
main components of the vacuum cleaner. In a traditional manner, the
main body 100 has a chassis 110 which supports separating and
collecting apparatus 120 and a motor-driven fan (not shown) for
generating a suction which can draw dirt laden air into the
separating apparatus 120. The main body 100 also has two main
wheels 112, one on each side of the rear portion of the chassis
110, and a castor wheel 113 beneath the front portion of the
chassis 110 which allow the main body 100 to be dragged along a
surface. It will be understood that the wheels 112, 113 could be
supplemented, or replaced, by other means for allowing the main
body 100 to be dragged across a surface, such as skids. The form of
the separating apparatus 120 is not important to the invention.
While we prefer to use cyclonic separators which spin dirt, dust
and debris from the airflow, other forms of separator can be used
and examples of suitable separator technology include a centrifugal
separator, a filter bag, a porous container, an electrostatic
separator or a liquid-based separator.
[0031] In FIG. 2, the separating apparatus comprises two generally
cylindrical chambers 121, 122 which lie alongside one another. The
chambers 121, 122 are connected to one another by a central spine
123. The separating apparatus 120 is removably mounted on the
chassis for emptying and for access to components beneath the
separating apparatus.
[0032] 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.
[0033] 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
FIG. 1 where the inlet is near the upper part of the separating
apparatus 11, it is preferable to anchor the hose 150 to the
machine at a central position (as with anchor point 25 in the
machine shown in FIG. 1) so that when a user pulls the hose 150,
the main body 100 follows the user.
[0034] 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.
[0035] 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 FIG.
4, the wand comprises a set of three tubes 161, 162, 163 of
progressively decreasing diameter. The tubes 161, 162, 163 can
telescope inside one another and are retractably housed inside a
storage tube 165. The three tubes 161, 162, 163 are slideable
inside one another and can be moved between a stored position (as
best shown in FIG. 6) and an extended position (as shown in FIG. 4)
in which one tube is extended from another such that only the ends
of the tubes overlap one another. Securing mechanisms 400 secure
the tubes in an extended position, as will be described more fully
below. Tubes 161, 162, 163 are progressively longer in length. The
length of each tube is chosen so that it fully occupies the
available space within the storage tube 165 when the securing
mechanisms 400 are lying alongside one another.
[0036] 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
FIG. 1, in any known manner. For example, the floor tool can be
connected to the tube 163 by means of an interference fit,
interconnecting bayonet fittings, snap-fit connections, a screw
threaded collar and sleeve, or by any other suitable means.
Accessory tools may also be fitted to the tube 163 in place of the
floor tool. A handle 200 is connected to storage tube 165 to allow
a user to manipulate the wand 160. Flexible hose 150 extends from
one end of the storage tube 165 and is connected to the storage
tube 165 by an outlet connector 168 which is rotatable about axis
X-X', as shown in FIG. 5. This part of the wand is described more
fully in our International Patent Application WO 01/50940.
[0037] 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 FIGS. 2 and 3.
[0038] As best seen in FIG. 3A, the length of the storage tube 165
is substantially equal to the length of the part of the main body
100 against which the wand is stored. In this manner, the wand 160
does not protrude too far beyond the main body 100 when it is fully
retracted and stored on the main body 100.
[0039] As best seen in FIG. 6, the wand 160 is stored alongside the
uppermost surface of the main body 100. FIG. 6 shows a
cross-section through the wand 160 and the upper part of the
separating apparatus 120 taken along the longitudinal axis of the
vacuum cleaner. In this embodiment the upper surface of the
separating apparatus 120, which itself is releasable from the
remainder of the chassis 110 for emptying, is the part of the main
body against which the wand 160 is secured. Fittings on the storage
tube 165 of the wand assembly cooperate with complementary fittings
on the upper surface of the separating apparatus 120 to retain the
storage tube 165. The lower end of the storage tube 165 has a
hooked projection 220 which extends outwardly from the tube 165.
The hook 220 can locate beneath a hook 130 on the separating
apparatus 120. This pair of hooks 220, 130 provides some mechanical
support for the wand 160 during carrying, and also helps to
properly locate the wand 160. The majority of the mechanical
support is provided by a locking catch at the other end of the
storage tube 165. The locking catch comprises a movable catch ring
222 with a catch face 225 and is shown in more detail in FIG. 7.
The catch face 225 locates beneath another hook 135 on the upper
face of the separating apparatus 120. The locking catch mechanism
comprises a catch ring 222 which is pivotably mounted about the
outside of the storage tube 165 about pivot point 223. The lower
part of the catch ring 222 carries a catch face 225 for engaging
with the main body. The catch ring is biased, by spring 241, into
the locked position shown in FIGS. 5 and 6. An actuator member 235
is pivotably mounted to the storage tube 165 about pivot point 236.
The actuator member 235 has a part which serves as a button 230
which can be operated by a user. The actuator member is biased by a
spring 242 into the position in which it lies alongside the tube,
as shown in FIGS. 2, 3A, 5 and 6. Actuator member 235 has an arm
237 on each of its sides, the end of the arm 237 locating within a
notch 238 on the catch ring 222. In use, movement of the actuator
member 235, by a user pressing button 230 in clockwise direction
239, causes arm 237 to urge catch ring 222 in an anti-clockwise
direction about pivot point 223 to release catch 225. Actuator
member 235 also has two further locking functions which are
simultaneously achieved when button 230 is pressed. Firstly, the
furthest end of the actuator member has a hook 231 which can engage
with the connector 280 on the end of the tube 163. When all of the
tubes 161, 162, 163 have been retracted into the storage tube 165,
connector 280 lies alongside the end of storage tube 165 and hook
231 can hook onto connector 280. All of the tubes 161, 162, 163 are
held securely within storage tube 165 until the actuator member 235
is operated to release the hook 231. The leading edge of hook 231
has an inclined face which can be displaced by the leading edge of
connector 280 as the tubes are retracted inside the storage tube
165. This allows the hook 231 to automatically ride onto, and thus
retain, the cap 280 as the tubes are moved towards a stored
position. Connector 280 has a cap which, in the stored position
(best shown in FIG. 6) accommodates all of the securing mechanisms
400 of the tubes and thus serves to protect them from damage during
storage.
[0040] 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.
[0041] 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.
[0042] 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.
[0043] 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.
[0044] 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.
[0045] 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.
[0046] 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.
[0047] 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.
[0048] 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.
[0049] In the embodiment shown in FIGS. 2 and 3 a single continuous
hose receiving channel 300 is provided along the sides and back of
the periphery of the chassis 110. FIG. 2 shows the hose 150 in
place in the channel 300 and FIGS. 3A and 3B show the hose removed
from the channel 300.
[0050] 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 FIG. 9. This part of the channel 300
defines the storage path for the hose 150 and serves to guide and
support the hose 150 when it is stored. At each end the channel 300
there is a hose retaining part 310 which is capable of grasping the
hose 150. The hose retaining parts 310 have a shape which is
greater than a semi-circle, i.e. the channel extends around greater
than half of the circumference of the hose 150. As shown in the
cross-section of FIG. 10, hose retaining parts 310 have two leading
edges 311, 312. The channel, or at least the hose retaining parts
310 of the channel, are formed from a material, such as
polypropylene, which is sufficiently resilient to allow the leading
edges 311, 312 to be prised apart to form an opening with a width
which is at least equal to the diameter of the hose 150. The
material should also be capable of withstanding repeated flexing of
this kind over the lifetime of the machine. The entire channel 300,
the hose retaining parts 310, or even just the leading edges 311,
312 of the channel can be formed from the resilient material, with
the remainder of the channel being formed of a more rigid material.
This shape of hose retaining parts 310 allows the hose, once it is
fitted within the channel 300, to remain clasped by the leading
edges of the channel. The hose can be removed from the channel 300
by applying a force to the hose which is sufficient to overcome the
retaining force of the leading edges 311, 312 of hose retaining
parts 310. Thus, the hose 150 can be removed in a one handed
operation. In a more elaborate alternative scheme, the leading
edges 311, 312 of the hose retaining parts 310 can be provided with
finger grips by which a user can, with one hand, prise the leading
edges apart while the user, with their other hand, pulls the hose
150 from the channel.
[0051] 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.
[0052] 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 FIGS. 11A and 11B. The collar 350 serves as a guide for
informing a user where to begin fitting the hose 150 into channel
300. As well as visually indicating the correct position for
fitting the hose 150, it can be readily located (felt) by a user.
Because collar 350 is wider than channel 300, that part of the hose
on which collar 350 is fitted cannot be fitted inside the channel.
Thus, the hose 150 simply cannot be fitted with an unacceptably
tight bend in the region of inlet 151 or wand connector 168. Collar
350 comprises a first collar 351 which has a plurality of radially
inwardly extending ribs for engaging with the spaces between ribs
on the hose 150. The first collar 351 can be formed as two
semi-circular parts which are fitted to the hose 150 by snapping
them around the hose in the desired position. A second collar 352
fits around the first collar 351 and holds the two semi-circular
halves of collar 351 in place. A small bump feature 353 on the
outer surface of first collar 351 corresponds to a small depression
on the inner face of second collar 352.
[0053] 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 FIGS. 2, 3A,
3B and 8 it can be seen that the hose 150 begins at the front,
lower part of the main body 100, curves around the front of the
machine, over the top of the first wheel 112, fitting within the
envelope of the machine. After closely following the shape of the
wheel, and closely fitting alongside the separating apparatus 120,
the hose 150 passes, along a generally convex shaped path beneath a
tool storage area on the rear of the machine. On the other side of
the machine the hose follows the same path, before following a
gently curving path to the wand connector 168. This layout not only
allows the hose 150 to fit neatly within the overall envelope of
the machine, but it increases the length of the path, compared to a
coil which lies in a single plane, thus increasing the length of
hose 150 which can be accommodated. It is noted that the ends of
hose 150 are held in position by virtue of connection 151 to the
main body and connection 168 to the wand.
[0054] The wand 160 itself will now be described in more
detail.
[0055] 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.
[0056] The detail of these securing mechanisms is not important to
the invention. However, for completeness, one embodiment will now
be described with reference to FIGS. 12 and 13. Tubes 162, 163
represent two adjacent stages of the wand 160.
[0057] 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.
[0058] 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.
[0059] 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.
[0060] 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.
[0061] 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 FIG. 6.
Conveniently, these locking positions are provided as notches 233
in a ridge which runs along the length of tube 161.
[0062] 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.
[0063] 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.
[0064] 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.
[0065] 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 FIG. 12, the tubes automatically
lock in this position.
[0066] 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.
[0067] 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.
[0068] Alternatives
[0069] Handles
[0070] 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 FIG. 14, a first handle 600
is provided for use during cleaning and a second, separate, handle
605 is provided for carrying the vacuum cleaner.
[0071] Another alternative is shown in FIG. 15 where a single
handle is movable between a first position, for use in carrying the
machine, and a second position for use during normal cleaning
operations. The handle is pivotable between the two positions and
is positively retained in each of the positions. This retention of
the handle can be by a locking mechanism which is automatically
operated as the handle is moved into the new position, and which is
manually released, such as by a user operating a trigger, to
release the handle from that position.
[0072] In another alternative shown in FIG. 16 there is no handle
as such for manipulating the wand. Instead, an angled conduit 610
is rigidly (non-rotatably) fixed to the end of tube 165 and this
angled conduit 610 serves as a part by which the user can
manipulate the wand. The angled conduit 610 can be shaped to
provide a comfortable gripping surface, or it can be overlaid by a
material which makes the conduit more comfortable to hold. In a
still further embodiment, not illustrated, the carrying handle can
be omitted altogether. In this case, the main body can be provided
with an alternative carrying handle.
[0073] Wand Storage
[0074] 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 FIG. 17. In this alternative
embodiment the receiving channel 660 has a sufficient depth 661 to
fully receive the storage tube 165 of the wand, with only the carry
handle 200 protruding above the upper surface of the main body
100.
[0075] Hose Storage Channels
[0076] 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.
[0077] In an alternative embodiment, the entire channel can have a
hose retaining function. Looking again at FIGS. 2 and 3, this would
be achieved by extending the leading edges 311, 312 all the way
along the channel. Thus, the channel would have generally the same
cross-section all the way along its length.
[0078] The channel can be integrally formed with the remainder of
the chassis, as shown in FIG. 18, or it can be formed as a separate
part which can then be mounted on the chassis during assembly of
the machine. The channel can be removably mounted to the chassis so
that, if a user does not want this feature they can simply remove
the channel from the chassis.
[0079] 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.
[0080] The hose retaining function can be achieved with other types
of mechanism. FIG. 19 shows individual clips 680 fitted to the
periphery of the chassis 110 of the main body. There can be a
single clip 680 on each side of the main body, or a number of such
clips positioned along the intended hose storage path around the
periphery of the main body.
[0081] Another form of clip is shown in FIG. 20. This is in the
form of a clip which can be manually opened or closed. There is a
generally semi-circular (or other) shaped support part 650 and a
second part 652 which is hingedly connected to the first part 650
or directly to the chassis 110. Part 652 is operable between an
open state, in which part 652 opens far enough to allow hose 150 to
be inserted into, or removed from, the clip and a closed state, in
which the hose 150 is held against part 650. An alternative form of
clip would have a pair of arms, each being hinged 655 to a side of
support part 650. The arms can extend fully around the hose so as
to meet in the middle or can extend only partially around the hose
150. Preferably each arm is sprung loaded (e.g. by a sprung hinge)
such that it rests firmly in both the open and closed states.
Alternatively, an additional latch can hold the pair of arms
together once they are brought into the closed position.
[0082] Another form of retaining mechanism is shown in FIGS. 21 and
22. A plurality of storage rings are positioned around the
periphery of the main body 100. The storage rings can be formed of
a rigid material or they can be formed of a resilient material,
such that ring 690 can be stretched open to receive the hose 150,
and return to a position where it fits snugly around the hose 150.
Conveniently, the rings 690 can be formed from a rubber compound.
To retain the hose 150 on the main body 100, the hose 150 is fed
through each of the rings 690 in turn. This is a less desirable
solution to what has previously been described as it requires the
hose to be separated from the wand to allow the hose 150 to be fed
through the set of rings. After feeding the hose through the rings
the hose can be connected, once again, to the wand.
[0083] 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.
[0084] In a still further alternative scheme, shown in FIG. 23, the
hose 150 is not held in place by clips or a channel which grasps
the hose 150. Rather, the hose 150 is held under tension by hooks
681, 682, 683 positioned around the chassis 110 of the main body
100. The hooks 681, 682, 683 are each positioned on the inside of
each turn along the path around the body. They define the storage
path around the body and they support the hose 150. Each ring has a
curved support surface on which the hose 150 can lie. Hook 681 is
positioned above the wheel 112, hook 682 is positioned on the rear
of the chassis to define the path along the rear of the chassis,
and hook 683 is positioned in the same way as hook 681, but on the
other side of the chassis 110. It is noted that the ends of hose
150 are held in position by virtue of connection 151 to the main
body and connection 168 to the wand.
[0085] 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.
[0086] Hose Location Collar
[0087] 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.
FIGS. 24-26 show a range of alternative schemes for instructing a
user where to fit the hose 150 around the main body 100 of the
cleaning appliance. In FIGS. 24 and 25 the hose storage channel and
hose location fitting have a corresponding shape which serves to
instruct a user where to fit the hose. In FIG. 24 the mating shapes
are provided by surface 361 at the end of the storage channel 360,
and by surface 362 on collar 365 on the hose 150. In FIG. 25
ring-shaped cavities 372 are formed at an intermediate position
along the storage channel 370. Ring-shaped fittings 371 on hose
collar 375 fit within the cavities 372 on storage channel 370.
[0088] 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. FIG. 26 show
visual markings 378, 379 on collar 350 and the end of storage
channel 380.
* * * * *