Note: Descriptions are shown in the official language in which they were submitted.
CA 02659212 2009-03-20
TITLE: SURFACE CLEANING APPARATUS
FIELD
The specification relates to the constructions of a surface cleaning
apparatus. In a preferred embodiment, the specification relates to a cyclone
unit
that comprises a cyclone and a dirt chamber that is external the cyclone. In
another embodiment, the specification relates to a first stage cyclone for an
upright or stick vacuum cleaner wherein the first stage cyclone is inverted.
INTRODUCTION
The following is not an admission that anything discussed below is
prior art or part of the common general knowledge of persons skilled in the
art.
Cyclonic separators, including those used in vacuum cleaners are
known in the art. Typically, a cyclonic separator has an inlet for fluid (air,
liquid or
and air and liquid mix) to be treated and an outlet for treated fluid. Dirt
may be
collected either in the cyclone chamber itself (e.g. in the bottom) or in a
collection
chamber in fluid communication with the cyclone separator. Various such
constructions are known in the art.
Cyclonic hand vacuum cleaners have also been developed. These
vacuum cleaners have typically used similar operating principles as full size
cyclonic vacuum cleaners. See for example PCT publication WO 2008/009890;
PCT publication WO 2008/009888; PCT publication WO 2008/009883; and
United States patent 7,370,387.
SUMMARY
The following introduction is provided to introduce the reader to the
more detailed discussion to follow. The introduction is not intended to limit
or
define the claims.
According to one broad aspect, a surface cleaning apparatus is
provided that comprising an inverted first stage cyclone mounted to an upright
-1-
CA 02659212 2009-03-20
section of an upright surface cleaning apparatus, and preferably of a stick
vacuum cleaner. When the surface cleaning apparatus is in use, dirt is
entrained
in an air stream that is drawn into the cyclone, separated by the cyclonic
action of
the cyclone and then deposited in a dirt chamber. Preferably the dirt chamber
is
external cyclone so that the accumulation of dirt within the dirt collection
chamber
may not affect the performance of the cyclone. In a preferred embodiment, the
cyclone may have a cylindrical housing or perimeter wall with an upward facing
dirt outlet that is surrounded by, e.g., a generally annular shaped dirt
collection
chamber. In this embodiment, dirt that is separated from the air stream may be
ejected from the dirt outlet of the cyclone and fall into, and collect within,
the
surrounding dirt collection chamber.
According to another broad aspect, a surface cleaning apparatus is
provided that comprising a cyclonic unit mounted to an upright section of an
upright surface cleaning apparatus, and preferably of a stick vacuum cleaner.
When the surface cleaning apparatus is in use, dirt is entrained in an air
stream
that is drawn into the cyclone, separated by the cyclonic action of the
cyclone
and then deposited in a dirt chamber. The cyclonic unit comprises a cyclone
and
a dirt chamber that is external cyclone. In a preferred embodiment, the
cyclone
may have a cylindrical housing or perimeter wall with a dirt outlet that is
surrounded by, e.g., a generally annular shaped dirt collection chamber. In
this
embodiment, dirt that is separated from the air stream may be ejected from the
dirt outlet of the cyclone and pass into, and collect within, the surrounding
dirt
collection chamber.
In one embodiment, a surface cleaning apparatus may comprise a
floor cleaning unit comprising a surface cleaning head. The surface cleaning
head may have a dirty air inlet, a cleaning head air outlet and an upright
section
comprising a handle drivingly connected to the surface cleaning head. The
surface cleaning apparatus may also comprise a cyclone unit mounted on the
upright section and positioned in the air flow passage. The cyclone unit may
-2-
CA 02659212 2009-03-20
comprise a cyclone having an air inlet and an air outlet, and a dirt
collection
chamber exterior to the cyclone. The surface cleaning apparatus may also
comprise a suction motor positioned in the air flow path.
In one embodiment, a surface cleaning apparatus may comprise a
floor cleaning unit comprising a surface cleaning head having a dirty air
inlet, a
cleaning head air outlet and an upright section comprising a handle drivingly
connected to the surface cleaning head; A first stage cyclone unit may be
mounted on the upright section and positioned in the air flow passage. The
cyclone unit may comprise an inverted cyclone having an air inlet and an air
outlet, and a dirt outlet at an upper end with a suction motor positioned in
the air
flow path.
In some examples, the surface cleaning apparatus may comprise a
surface cleaning unit removably mounted to the handle wherein the surface
cleaning unit comprises the cyclone unit and the suction motor.
In some examples, the cyclone comprises a dirt outlet provided at
an upper end of the cyclone.
In some examples, the cyclone and the dirt collection chamber are
concurrently openable.
In some examples, the cyclone is positioned interior of the dirt
collection chamber.
In some examples, the upright section has an absence of a housing
defining a recess for receiving the portable surface cleaning apparatus.
In some examples, the upright section may comprise at least one
support rod.
In some examples, the dirt outlet may comprise an open end of the
cyclone and the apparatus further comprises a plate facing the dirt outlet.
-3-
CA 02659212 2009-03-20
In some examples, the plate has a diameter about the same as a
diameter of the dirt outlet.
In some examples, the plate is mounted to an upper end of the
cyclone unit.
In some examples, the air outlet of the cyclone comprises a vortex
finder and a shroud is provided in the air flow path from a cyclone chamber in
the
cyclone to the air outlet of the cyclone.
In some examples, the surface cleaning may comprise a plurality of
pre-motor filters.
In some examples, the pre-motor filters comprise an upstream filter
and a downstream filter, the downstream filter having smaller pores then the
upstream filter.
It will be appreciated that an embodiment may contain one or more
of features set out in the examples.
DRAWINGS
In the detailed description, reference will be made to the following
drawings, in which:
Figure 1 is a front elevation view of an example of a vacuum
cleaner;
Figure 2 is a back perspective view of the vacuum cleaner of Figure
1 with a portable surface cleaning apparatus mounted to a support structure;
Figure 3a is a back perspective view of the vacuum cleaner of
Figure 1 with the portable surface cleaning apparatus removed from the support
structure and in a position in which it may be carried by hand;
Figure 3b is a side elevation view of the portable surface cleaning
apparatus of Figure 3a wherein the portable surface cleaning apparatus has
-4-
CA 02659212 2009-03-20
been removed from the support structure and is in a position in which it may
be
carried by hand with flexible hose detached from the surface cleaning head;
Figure 4 is a partially exploded side perspective view of the vacuum
cleaner of Figure 1 with the portable surface cleaning apparatus removed from
air flow communication with the floor cleaning unit;
Figure 5 is a front isometric view of the vacuum cleaner of Figure 1
with the portable surface cleaning apparatus removed;
Figure 6 is side elevation view of a hand vacuum cleaner;
Figure 7 is a front elevation view of the hand vacuum cleaner of
Figure 6;
Figure 8 is a bottom isometric view the hand vacuum cleaner of
Figure 6;
Figure 9 is a bottom isometric view of the hand vacuum cleaner and
an attachment member;
Figure 10 is a partially exploded bottom isometric view of the hand
vacuum cleaner and an attachment member of Figure 9;
Figure 11 is a side isometric view of the attachment member of
Figure 9;
Figure 12 is a front elevation view of the attachment member of
Figure 11;
Figure 13 is a side isometric view of the attachment member of
Figure 11;
Figure 14 is a partially exploded isometric view of the attachment
member of Figure 11;
Figure 15 is a front isometric view of an alternate example of a
vacuum cleaner with a portable surface cleaning apparatus mounted thereto;
-5-
CA 02659212 2009-03-20
Figure 16 is a partial rear isometric view of the vacuum cleaner of
Figure 15;
Figure 17 is a rear isometric view of an alternate example of a
vacuum cleaner with a portable surface cleaning apparatus mounted thereto;
Figure 18 is a partial front isometric view of the vacuum cleaner of
Figure 17 with the portable surface cleaning apparatus removed;
Figure 19 is a partial top view of the surface cleaning head of the
vacuum cleaner of Figure 17;
Figure 20 is a side elevation view of a portable surface cleaning
apparatus having a partially transparent dirt chamber;
Figure 21 is an isometric view of the portable surface cleaning
apparatus of Figure 20 with the dirt chamber door removed; and,
Figure 22 is a section view of the portable surface cleaning
apparatus of Figure 20.
DESCRIPTION OF VARIOUS EXAMPLES
Various apparatuses or methods will be described below to provide
an example of each claimed invention. No example described below limits any
claimed invention and any claimed invention may cover processes or
apparatuses that are not described below. The claimed inventions are not
limited
to apparatuses or processes having all of the features of any one apparatus or
process described below or to features common to multiple or all of the
apparatuses described below. It is possible that an apparatus or process
described below is not an embodiment of any claimed invention.
Figures 1-5 exemplify an upright vacuum cleaner optionally having
a removably mounted portable surface cleaning apparatus, optionally a hand
vacuum cleaner, wherein the portable surface cleaning apparatus preferably has
-6-
CA 02659212 2009-03-20
a nozzle having an open sided air flow chamber. It will be appreciated that
the
portable surface cleaning apparatus may be of any construction (e.g., a hand
vacuum cleaner) and may use any particular air treatment member (e.g., one or
more cyclones comprising one or more cyclonic cleaning stages and one or more
filters). It will also be appreciated that the upright structure to which the
portable
surface cleaning apparatus is removably attached may be of any particular
design. Further, the floor cleaning unit may alternately, or in addition, use
an
open sided nozzle and may selectively receive an auxiliary cleaning tool.
Referring to Figures 1 to 5, a first example of a surface cleaning
apparatus 100 is shown. The surface cleaning apparatus 100 is a vacuum
cleaner that comprises a floor cleaning unit 200 comprising a surface cleaning
head 300 having a support structure 210 pivotally mounted thereto and a
portable surface cleaning apparatus 400 that is removably mounted to support
structure 210. Support structure 210 may also be referred to as a handle, a
backbone or an upright section.
In the example shown, the handle 210 has an upper portion 214
and a lower portion 216 that are optionally pivotally connected by a hinge
218.
The handle 210 is attached to the surface cleaning head 300 and a user can
move the surface cleaning head 300 along a surface to be cleaned by gripping
and maneuvering the handle 210. Optionally, the lower portion 216 of the
handle
210 can be hingedly or pivotally attached to the surface cleaning head 300, so
that the lower portion 216 of the handle 210 can move relative to the surface
cleaning head 300 during use. This may enable the user to move the surface
cleaning head 300 beneath cabinets, furniture or other obstacles.
The upper portion 214 of the handle optionally includes a grip 212
that is shaped to be gripped by a user. In the example shown, the grip 212 is
at
the top, or upper end of the upper portion 214 of the handle 210 and is formed
in
a closed loop-type shape having surfaces that are rounded to increase user
-7-
CA 02659212 2009-03-20
comfort. In other examples, the grip 212 may be of a different configuration
or
may be located at a different position on the upper portion 214 of the handle
210.
In addition to the grip 212, the upper portion 214 of the handle 210
optionally includes a bracket 113 that supports an auxiliary, or accessory or
supplemental cleaning tool 112. In the example shown, the bracket 113 is
configured to hold a single auxiliary cleaning tool 112, but in other examples
the
bracket 113 may be configured to hold more than one auxiliary cleaning tool
112.
Also, while shown attached to the upper portion 214, it is understood that the
bracket 113 may be attached to other locations on the surface cleaning
apparatus, including the lower portion 216, the surface cleaning head 300
and/or
the hand vacuum 400.
In the example shown, the upper and lower portions 214, 216 have
a generally cylindrical or tube-like shape. However, in other examples, the
upper
and lower portions 214, 216 may any other type of thin support members having
suitable cross-sectional shape including square, rectangular or polygonal. In
addition, the upper and lower portions 214, 216 may be solid or hollow and may
be formed from any suitable material, including plastic and metal. In other
embodiments, it will be appreciated that handle may be a single unit, e.g., a
support rod such that upper and lower portions 214, 216 are part of the same
element. Alternately, upright section 210 may comprise a frame for removably
receiving a portable surface cleaning apparatus.
The upper and lower portions 214, 216 of the handle 210 are
optionally pivotally joined by hinge 218. When the hinge 218 is in a first
position,
as shown in Figures 1, 2, 4 and 5 the upper and lower portions 214, 216 of the
handle 210 are generally aligned with each other. The hinge 218 is retained in
this first position by a biasing or locking means so that first portion 214 of
the
handle 210 remains in a generally vertical aligned with lower portion 216 when
not in use and so that movements of the first portion 214 of the handle 210
can
be translated to the second portion 216. In use, the hinge 218 can be
unlocked,
-8-
CA 02659212 2009-03-20
or released from the first position and can move into a second position,
wherein
the grip 212 is preferably rotated forwardly.
In the example shown, the grip 212 comprises a hinge release 213
that can be activated by a user during use of vacuum cleaner 100 to unlock the
hinge 218. When a user activates the hinge release 213, the retaining or
locking
means used to secure the hinge 218 in the first position is disengaged,
allowing
the hinge 218 to rotate or pivot, as shown in Figure 3a. As the hinge 218
rotates,
the first portion 214 of the handle 210 can be moved into a plurality of
angular
positions relative to the second portion 216 handle 210. Optionally, the hinge
218 may rotate between, and lock into, a given number of set or indexed
angular
positions. Alternatively, the rotation of the hinge 218 may be continuously
variable, after being initially unlocked, allowing for the first portion 214
to be
moved into an indefinite number of angular positions relative to the second
portion 216 (e.g., freely rotatable).
In the example of the vacuum cleaner 100 shown, the lower portion
214 of the handle 210 extends from the hinge 218 to the surface cleaning head
300 and optionally comprises the portable surface cleaning apparatus mount 220
for receiving and supporting the hand vacuum 400. The lower portion 216 also
optionally comprises a hose guide 230 for keeping the flexible hose 124 in
close
proximity to the backbone 200. When the portable surface cleaning apparatus
400 is detached or removed from the backbone 200 the flexible hose 124 may be
removed from the hose guide 230, as shown in Figure 3a.
The surface cleaning head 300 serves as a base portion of the
vacuum cleaner 100 and is preferably in rolling contact with the surface to be
cleaned. When the vacuum cleaner is 100 in an upright position (as exemplified
in Figures 1, 2, 4 and 5) the surface cleaning head 300 is supported by
optional
main or rear wheels 320 and/or optional front wheels (not shown). However,
when the vacuum cleaner 100 is moved into an angled position during use (as
exemplified in Figure 3a) additional optional support wheel 321 that is
provided
-9-
CA 02659212 2009-03-20
on upright section 210 may also roll across the surface to be cleaned. In
other
examples of the vacuum cleaner 100 the surface cleaning head 300 may include
a greater or fewer number of wheels.
The surface cleaning head 300 also comprises a dirty air inlet 310
that is connected in fluid communication with a dirty air outlet 312 by one or
more
dirty air conduits (not shown). Preferably, the dirty air conduit is an air
flow
chamber wherein at least a portion of the lower side is open.
If the upright section includes a suction motor and/or an air
treatment unit, then the dirty air outlet 312 may, in turn, be coupled,
optionally
removably coupled, to the upstream end of the conduit, preferably a flexible
hose
124, that extends from the dirty air outlet 312 of the surface cleaning head
300 to
the upright section, such as the attachment member air inlet 126. The fluid
pathway may continue through the attachment member passageway 128, which
terminates in attachment portion air outlet 127, and through attachment
portion
air outlet 127 which mates with the opening 438 of the portable cleaning
apparatus 400. The connection between the attachment portion 120 and the
portable cleaning apparatus 400 is discussed in greater detail below.
Mount 220 is preferably configured to removably receive a portion
of the portable surface cleaning apparatus and/or an attachment member
removably mounted to the portable surface cleaning apparatus. The mount is
preferably configured to retain portable surface cleaning apparatus therein
under
the influence of gravity. Accordingly, a mechanical lock need not be used. In
particular, a user may lift the portable surface cleaning apparatus off of
upright
section 210 without having to press a button or otherwise release a mechanical
lock.
As exemplified in Figures 1-5 the mount 220 may be generally U-
shaped and may be sized to receive collar 140 or other mounting portion of the
attachment member 120. The inner surface of the mount 220 comprises a
-10-
CA 02659212 2009-03-20
protrusion 222 that extends outward from the inner surface of the mount 220
and
removably seats within the generally U-shaped channel 144 of the collar 140.
It
will be appreciated that mount 220 may comprise more than one member, as
exemplified in Figures 14-15.
The mount 220 may be located in a variety of locations along the
length of the second portion 216. Preferably, the mount 220 is positioned at
approximately the waist height of the intended user (e.g., 2.5 - 3.5 feet
above the
floor) so that the user can attached or detach the hand vacuum 400 from the
backbone 200 without bending over. This may decrease the stress and strain
experienced by the user when the user removes the hand vacuum 400 from the
backbone 200.
When attached to the portable surface cleaning apparatus 400 and
seated in the mount 220 (as shown in Figures 1 and 2), the attachment member
120 transfers all or a portion of the load (i.e. the weight) of the hand
vacuum 400
to the mount 220. Another portion of the load of the hand vacuum 400 may be
supported by an additional mounting bracket, such as mount bracket 224, which
receives and supports optional rear wheel 480 of the portable surface cleaning
apparatus 400. The surface of the mount bracket 224 may be complimentary to
the curved shape of the optional rear wheel 480 so that the optional rear
wheel
480 can at least partially nest within mount bracket 224. In addition to
supporting
the weight of the portable surface cleaning apparatus 400, the attachment
portion
120 also preferably serves as a fluid conduit establishing a fluid flow
connection
between the hand vacuum 400 and the airflow conduit 110, which is preferably a
flexible hose 124.
Loads placed on the mount 220 (via both the U-shaped opening
and/or the mount bracket 224) are in turn transferred via the lower portion
216 of
the handle 210 to the surface cleaning head 300 and ultimately to the floor or
other type of surface being cleaned. The mount 220 may be made from any
- 11 -
CA 02659212 2009-03-20
material that can support the weight of the hand vacuum 400, including plastic
and metal.
In the example of the vacuum cleaner 100 shown, the optional rear
wheel 480 of hand vacuum 400 and the attachment member 120 are each
preferably freely received by the mount 220 and held in place by gravity. The
protrusion 222 that seats within the channel 144 of the attachment member 120
also provides a degree of lateral support, restraining the movement of the
attachment member 120 (and therefore the hand vacuum 400) when the handle
210 is moved from a vertical position to an angled position when in use.
Further
protrusion 222 may comprise a cam surface to assist in guiding protrusion 222
into channel 144 as the portable surface cleaning apparatus is lowered onto
mount 220. Accordingly, the attachment member 120 and the optional rear
wheel 480 are preferably not held in place by clips, straps or any other type
of
mechanical fastening means.
The absence of mechanical fasters allows for simple, one-handed
removal of the attachment member 120 and the hand vacuum 400 from the
mount 220, without the need to unlock or undo any fasteners. One-handed
detachment of the hand vacuum 400 may be advantageous as it allows a user to
control and maneuver the backbone 200 with one hand while simultaneously
removing the hand vacuum 400 from the mount 220 with the other hand. In use,
this may allow a user to frequently attach and detach the portable surface
cleaning apparatus 400 from the mount 220 in response to the user's needs, for
example navigating around furniture, stairs or other obstacles on the surface
to
be cleaned.
While in the preferred example described above the mount 220 is
free of fasteners, in another example the mount 220 may be outfitted with
fastening devices for retaining the attachment member 120 and the additional
wheel 480. Examples of possible fasteners include clips, snaps, and straps.
Magnets may alternately or in addition be used. An advantage of using magnets
-12-
CA 02659212 2009-03-20
may assist in holding the portable surface cleaning apparatus on the backbone
but still permit one handed removal as no lock need be released.
Optionally, instead of removing the attachment portion 120 from the
mount 220, the hand vacuum 400 may be decoupled from the attachment portion
while the attachment portion is positioned in mount 220, as shown in Figure 5.
In
an embodiment, it will be appreciated that attachment member 120 may not be
removable from mount 220.
Referring to Figures 15-19, other examples of the vacuum cleaner
100 are shown. These figures exemplify features of a surface cleaning
apparatus that may be used with any embodiment disclosed in herein, either
individually or in any particular combination or sub-combination. The features
exemplified in these figures include a surface cleaning head, a support
structure
for an upright or stick vacuum cleaner, and a handle mount for a surface
cleaning
apparatus.
In this description, an alternate structure for supporting an air
treatment unit and/or a suction motor is provided. As exemplified, the second
portion 216 may include a generally upside down U-shaped wishbone portion
250. The wishbone 250 is optionally provided with a hinge 218 at the centre of
an upper portion of the wishbone 252, and each prong 254 of the wishbone
extends downward, and connects to a rib 256. The ribs 256 are preferably
substantially parallel and cooperate to define an optional mount for receiving
a
removable surface cleaning unit, such as the split saddle configuration that
is
exemplified. Optionally, the ribs 256 may be integrally formed with the prongs
254 of the wishbone portion 250, or they may be separate tubes or rods
fastened
to the prongs 254 of the wishbone 250, as shown.
A preferred mount comprises a pair of generally opposing saddle
flanges 280 (one on each rib) that cooperate to provide a mount or a mounting
location for the attachment member 120 that is connected to the hand vacuum
-13-
CA 02659212 2009-03-20
400. Due to the spacing of the ribs 256 and the general curvature of the hand
vacuum 400, the hand vacuum 400 is preferably positioned in front of ribs 256.
The attachment member 120 extends rearward of hand vacuum 400 and may be
received on split saddle flanges 280 in a similar manner to mount 220.
Alternately, it will be appreciated that hand vacuum 400 may be partially nest
between, or be received between, the ribs 256.
As exemplified, to supportingly engage the attachment member
120, each saddle flange 280 preferably includes a projection or protrusion
(not
shown) that is received within the channel 142 of the collar 140 (as described
in
more detail with reference to Figures 11-14 below). The generally curved
profile
of the collar 140 and channel 142 may enable the attachment member 120 (and
the associated hand vacuum 400) to generally self-level or self-register
between
the ribs 256 when the user initially places the attachment member 120 on the
saddle flanges 280. Like the mount 220 described above, the saddle flanges 280
may include magnets or other fastening devices to secure or retain the
attachment member 120. Optionally, the mount 220 or any other suitable type of
mounting hardware may replace the saddle flanges 280 in this example.
The lower ends of the ribs 256 may be attached to a bracket 260
having a generally opposite configuration than the wishbone. That is, the
bracket
may include two, upward facing projections 262, for attaching to the ribs 256,
that
are connected by a cross-member 264 to provide a single downward facing
coupling point 266. The spaced apart ribs provide two mounting points. Various
of such structure may be used.
Preferably, lower portion 216 is rotatably mounted to the cleaning
head. Accordingly, a user may rotate grip 212 clockwise or counterclockwise to
assist in steering the cleaning head. Accordingly an advantage of providing a
single, downward facing coupling point may be the fact that a single coupling
point can be pivotally and rotationally connected to the surface cleaning head
-14-
CA 02659212 2009-03-20
300. Another advantage is that a narrower rear end may be utilized for the
floor
cleaning unit.
Accordingly, as exemplified, the bracket 260 preferably also
includes a housing 268, which is preferably hollow, having a lower opening 270
that connects to the surface cleaning head 300. As exemplified, housing 268
may be pivotally mounted to surface cleaning head, preferably at about the
location of rear wheels 320, such as by having a portion pivotally mounted to
the
axle of rear wheels 320. Optionally, the connection between the lower opening
270 and the surface cleaning head 300 can be a rotatable and pivotal
connection. The hollow housing 268 may extend from the lower opening 270,
through the cross-member 264 to define an upper collar 272.
Optionally, as in this example, the surface cleaning head 300
includes a hollow conduit member 330 and a second air conduit 334. As
exemplified in Figures 17-19, one example of the second air conduit 334 is a
second flexible hose 335. In the preferred arrangement shown, the dirty air
outlet 312 of the surface cleaning head 300 is connected to the second or
upstream flexible hose 335 and the second flexible hose 335 extends from the
dirty air outlet 312, through the hollow conduit member 330, through the
hollow
housing 268 to the upper collar 272. The downstream end of the second flexible
hose 335 may be fixedly connected to the upper collar 272, or it may have a
fitting that seats upon a surface of the upper collar 272 preventing the
second
flexible hose 335 from retracting within the hollow housing 268 while leaving
the
downstream end of the second flexible hose 335 free to extend upward, away
from the upper collar 272.
The second flexible hose 335 forms part of the continuous airflow
passageway that connects the dirty air outlet 312 of the surface cleaning head
300 to the opening 438 on the hand vacuum 400. To establish the continuous
airflow passageway, the downstream end of the second upstream flexible hose
335 may be connected to the upstream end of the downstream flexible hose 124.
-15-
CA 02659212 2009-03-20
The connection between the flexible hose 124 and the downstream end of the
second flexible hose 335 is preferably a detachable connection so that the
flexible hose 124 can be detached from the surface cleaning head 300 as
described above.
Optionally, the second flexible hose 335 is also an extensible, or
stretchable, hose that can extend when pulled on by the user. In some
examples, the second flexible hose 335 is a stretch hose and may have a
stretched length to non-stretched length ratio of between 2:1 - 6:1. In
examples
where the second flexible hose 335 is not stretchable, when a user removes the
hand vacuum 400 from its mount during use, the maximum distance that the
hand vacuum 400 can be separated from the backbone 200 and the surface
cleaning head 300 is determined by the length of the flexible hose 124.
However, in some instances, a user may wish to move the hand vacuum 400 a
greater distance from the backbone 200, for example to pass the surface
cleaning head 300 under a bed or other large piece of furniture. When a
stretchable second flexible hose 335 is used, the downstream end of the second
flexible hose 335 can unseat from the upper collar 272 and extend away from
the
bracket 260, whereby some of hose 335 may pass through housing 268 thereby
lengthening the airflow conduit connecting the hand vacuum 400 to the surface
cleaning head 300 and allowing the hand vacuum 400 to be moved further from
the backbone 200 in use. Accordingly, it will be appreciated that some or all
of
the conduit that may be extended to provide additional length for an air flow
passage may be stored on the surface cleaning head 300.
It will be appreciated that lower section 216 may be rotatably
mounted on cleaning head 300 without hose 335 extending through a housing
268. Further, a housing 268 may be used even if lower section 216 is not
rotatably mounted to cleaning head 300. Such a housing need not be pivotally
mounted to surface cleaning head.
-16-
CA 02659212 2009-03-20
Preferably, the second flexible hose 335 is also resilient so that it
will return to its original, un-stretched length when it is released by the
user. The
resilience of the second flexible hose 335 may tend to retract the second
flexible
hose 335 through the hollow housing 268 and the hollow conduit member 330
and may serve to re-seat the downstream end of the second flexible hose 335 on
the upper collar 272. In this example, the second flexible hose 335 functions
as
a variable length air conduit and may reduce the need for a user to add extra
hoses or conduit members to the vacuum 100 during use.
To allow for easy and repeated extension of the second flexible
hose 335, the second flexible hose 335 may be sized to freely pass through
both
the hollow conduit member 330 of the surface cleaning head 300 and the hollow
housing 268 of the bracket 260.
In the example shown in Figure 15-19, the hollow housing 268 is
integral the bracket 260 and also serves as the coupling means that connects
the
lower portion 216 to the surface cleaning head 300. As shown, the coupling
between the lower portion 216 and the surface cleaning head 300 may be the
telescoping or overlapping engagement of the lower opening 270 over the
surface cleaning head 300 hollow conduit member 330. In other examples, the
coupling or attachment between the lower portion 216 and the surface cleaning
head 300 may be any type of connection including a threaded connection,
clamps or tabs. The connection between the lower portion 216 and the surface
cleaning head 300 may be fixed or selectively releasable. An advantage of
providing a single, downward facing coupling point 266 may be the fact that a
single coupling point 266 can be pivotally and rotationally connected to the
surface cleaning head 300. Further, the hollow conduit member 330 may be
pivotally connected to the surface cleaning head 300, as exemplified in
Figures
15-19, and in other examples, the hollow conduit member 330 may be fixedly
connected to the surface cleaning head 300, or integrally formed therewith.
-17-
CA 02659212 2009-03-20
As shown, the hollow housing 268 may be integral with the bracket
260 and provide both a hollow passageway and an attachment point. However,
in other examples, the hollow housing 268 may be external the bracket 260 and
may be formed from a separate conduit. Similarly, the air flow conduit 110
connecting the attachment member 120 to the second flexible hose 335 may be
the flexible hose 124 or any other suitable conduit, including flexible
conduits,
rigid conduits, conduits integral with the handle and conduits external the
handle.
Optionally, the ribs 256 (or another portion of the second portion
216) may be surrounded by a housing or shell. The housing may provide
structural strength to the second portion 216 or it may merely provide an
improved aesthetic appearance of the vacuum 100, or both. If a housing is
formed around a section of the second portion 216 (or any other section of the
handle 210 or backbone 200) the mount for supporting the hand vacuum (for
example the mount 220 or the saddle flanges 260) may be within a recess in the
housing. Providing a recess in the housing for receiving the hand vacuum may
create a more integrated or seamless visual appearance when the hand vacuum
is mounted to the backbone 200; it may also improve the rigidity of the
backbone
200.
As exemplified, wishbone portion 250 preferably extends forwardly
and provides a mount for upper portion 214 (i.e. the handle) at a forward
point of
the backbone. Further, passageway 268 extends rearwardly. Accordingly, when
hand vacuum 400 is mounted to the backbone, the centre of gravity of the
backbone and hand vacuum 400 combined is below a plane P extending from
the axle of rear wheel 320 to the upper end of upper portion 214 (as
exemplified
in Figure 17), thereby improving maneuverability of surface cleaning head 300.
It
will be appreciated that other constructions, such as that exemplified in
Figures
1-5, may be used to position the centre of gravity behind the plane. In the
example shown (best exemplified in Figure 5), the lower portion 216 includes
an
upper end, that is connected to the hinge 218 such that the upper portion 214
is
-18-
CA 02659212 2009-03-20
drivingly connected to the surface cleaning head 300. In this construction the
lower end includes a step-back or kinked-back portion 215. The step-back
portion 215 enables the mount 220 to be positioned sufficiently behind the
rear
wheels 320 such that the centre of gravity of the combination of the backbone
200 and the hand vacuum 400 is below the plane P. As a result of this
configuration, the vacuum 100 may be more stable when rotated and
maneuvered by the user, especially when upper portion 214 is rotated about
hinge 218. Specifically, locating the centre of gravity of the combination of
the
hand vacuum 400 and the backbone 200 below the plane P may tend to reduce
the over rotation of the backbone 200 or over-steer of the vacuum 100 in use,
and may reduce the strain on a user's arm and wrist.
It will be appreciated that the dual hose construction (i.e. the
flexible hose 124 and the second flexible hose 335 of Figure 15-19) may be
used
in combination with any example disclosed herein or by itself in a surface
cleaning apparatus. Similarly, the positioning of a removably mounted portable
surface cleaning apparatus with a low centre of gravity may be used in
combination with any example disclosed herein or by itself in a surface
cleaning
apparatus.
Referring now to Figures 6-14, examples of the portable cleaning
apparatus 400 and the attachment member 120 of the vacuum 100 are shown in
more detail. It will be appreciated that any portable surface cleaning
apparatus
may be used. Preferably, the portable surface cleaning apparatus uses cyclonic
separation. More preferably, the portable surface cleaning apparatus is a hand
vacuum cleaner.
The hand vacuum 400 can be operated as the vacuum suction
supply for the vacuum 100 and it can be operated as a stand alone hand vacuum
cleaner, that is movable along a surface to be cleaned by gripping and
maneuvering handle 402, when it is removed from, or detached from the
backbone 200. The hand vacuum 400 includes an upper portion 404, a lower
-19-
CA 02659212 2009-03-20
portion 406, a front 408, and a rear 410. In the example shown, maneuvering
handle 402 is provided at the upper portion 404. In alternate examples,
maneuvering handle 402 may be provided elsewhere on the vacuum cleaner
400, for example at the rear 410.
In the example shown, the hand vacuum 400 comprises a nozzle
412 and a cyclone unit 414, which together preferably form a cleaning head
portion 416 of the hand vacuum 400. In the example shown, the cleaning head
portion 416 is provided at the front 408 of the hand vacuum 400.
Nozzle 412 comprises a dirty air inlet 418, through which dirty air is
drawn into the portable cleaning apparatus 400, and when used as a hand
vacuum cleaner the nozzle 412 directly engages a surface to be cleaned. An
airflow passage extends from the dirty air inlet 418 to a clean air outlet 420
of the
hand vacuum 400. In the example shown, clean air outlet 420 is at the rear 410
of the hand vacuum 400. It will be appreciated that clean air outlet may
optionally
be connected to a fluid conduit provided in the floor cleaning unit.
Cyclone unit 414 is provided in the airflow passage, downstream of
the dirty air inlet 418. In the example shown, the cyclone unit 414 comprises
one cyclone 422, and one dirt chamber 424. In alternate examples, the cyclone
unit 410 may include more than one cyclone, and more than one dirt chamber.
Further, the cyclones chambers may be arranged in stages, and may be
provided in parallel or in sequence. Alternately, or in addition, one or more
filters
or other dirt separation members may be used.
In a preferred embodiment, cyclone unit 414 is the first cyclonic
cleaning stage of an upright vacuum cleaner and one or more additional
cyclonic
stages may optionally be provided. Cyclone unit 414 preferably comprises an
inverted cyclone and/or a dirt collection chamber that partially or completely
surrounds a cyclone chamber.
-20-
CA 02659212 2009-03-20
Referring to Figures 20 and 21, an example of a cyclone unit 414 is
shown in more detail. Within the cyclone unit 414, the cyclone 422 may be of
any configuration and orientation. Preferably, cyclone 422 comprises a chamber
wall 442, which in the example shown, is cylindrical. The cyclone chamber is
located inside chamber wall 442. The cyclone 422 has an air inlet and an air
outlet, which, preferably are at the same end of cyclone 422. Preferably the
air
inlet and the air outlet are distal to front end of the hand vacuum 400. The
cyclone air inlet and cyclone air outlet may be of any configuration known in
the
art and the cyclone air outlet may be covered by a screen or shroud or filter
as is
known in the art.
The air travels in a cyclonic path in the cyclone, and dirt in the air is
separated from the air. The air exits the cyclone via an outlet passage 444.
As
exemplified in Figure 21, a plate 474 may be provided adjacent outlet passage
444, spaced from and facing the outlet passage 444. As exemplified in Figure
22, the cyclone outlet passage 444 may comprise a vortex finder 482, upstream
from and in communication with the dirt outlet 446. As exemplified, the vortex
finder is a cylindrical conduit, having an inlet facing the dirt outlet 446.
In the example shown, plate 474, legs 478 and a wire mesh
surrounding legs 478 form a shroud 484 that is optionally removably mounted in
cyclone 422.
Preferably, the shroud 484 is positioned such that air must pass
through the openings in the shroud prior to traveling to a downstream
component
(e.g., a further cyclonic stage or a suction motor). As exemplified, the
shroud
surrounds the cyclone air outlet, or outlet passage 444. The shroud 484 may
serve to prevent elongate material and larger, lighter dirt from passing
through
dirt outlet 446. As exemplified, the shroud 484 surrounds the vortex finder
482.
Legs 478 extend from plate 474, along vortex finder 482. As exemplified, the
shroud 484 also comprises a ring 485 that is integral with legs 478 and
surrounds
vortex finder 482. The ring and legs provide a mount for plate 474.
Optionally, a
-21-
CA 02659212 2009-03-20
screen extends from plate 474, around legs 478, to ring 485. Accordingly, the
screen is positioned in the air flow path of air exiting the cyclone chamber
and
entering the vortex finder 482. It will be appreciated that in alternate
embodiments, the shroud may be any other suitable configuration. For example,
a plate need not be provided. In another example, the plate may be provided as
part of the vortex finder. The shroud screen may be made of a wire mesh.
Alternately, shroud 484 may be a molded plastic covering vortex finder 482 and
may have a plurality of apertures therein.
Optionally, the dirt chamber may be internal or external to the
cyclone chamber. Preferably, as exemplified in Figures 20-22, the dirt chamber
424 is external the outer cyclone housing 442, and the dirt that is separated
from
the air exits the outer cyclone housing 442 via dirt outlet 446, and enters
dirt
chamber 424. In the example shown, the dirt chamber 424 has an outer wall 415
that comprises a first portion 425 and a second portion 427. The second
portion
427 may also be referred to as a door or outlet end wall. Together, the first
and
second portions 425, 427 cooperate to define a sealed dirt chamber 424. As
exemplified, the first and second portions 425, 427 of the dirt chamber outer
wall
415 may also form the outer housing, casing or unit wall of the cyclone unit
414,
and more generally of the cleaning head portion 416 of the hand vacuum 400. In
other examples, the first and second portions 425, 427 of the dirt chamber
outer
wall, or portions thereof, may be surrounded by a separate housing, casing or
wall structure that defines the outer surface of the cyclone unit 414 and the
cleaning head portion 416 of the hand vacuum 400. Also, the dirt chamber 424
may be in communication with the cyclone chamber by any means known in the
art. Accordingly, one or more dirt outlets may be provided. Preferably, the
dirt
outlet is at the end opposed to the air inlet and, preferably, the dirt outlet
is at the
front end of the hand vacuum 400.
In the example shown, the dirt chamber 424 comprises two
volumes. A first volume 448 is provided immediately adjacent the dirt outlet
446,
-22-
CA 02659212 2009-03-20
and above the top of the outer cyclone housing 442, when the hand vacuum 400
is mounted on the backbone 200. A second volume 450 is the generally
annular space formed between the outer cyclone housing 442 and the first
portion 425 of the dirt chamber outer wall 415.
A separation plate 454 may be provided in the dirt chamber 424,
adjacent the dirt outlet 446. The separation plate 454 aids in preventing dirt
in
dirt chamber 424 from re-entering cyclone 422. Preferably, plate 454 is spaced
from dirt outlet 446 and faces dirt outlet 446. Plate 454 may be mounted by
any
means to any component in cyclone unit 414. As exemplified, the separation
plate is mounted on an arm, which extends from an inner surface of the front
wall
458 of the hand vacuum 400.
When the vacuum 100 is used to clean a surface the dirt separated
from the dirty air is collected in and retained in the dirt chamber 424. When
the
hand vacuum 400 is mounted on the backbone 200, gravity will urge the dirt
toward the bottom the dirt chamber 424 as exemplified in Figure 20 (that is,
toward the air outlet 420 and away from the second portion 427 of the dirt
chamber outer wall 415). As a result of ongoing or extended use of the vacuum
100, the amount of dirt collected within dirt chamber 424 will increase. As
the
amount of dirt contained within the dirt chamber 424 increases, the level of
dirt
within the dirt chamber 424 will rise, relative to the bottom of the dirt
chamber
424 as exemplified in Figure 20. Over time, the level of dirt within the dirt
chamber 424 will approach an optional designated fill line F indicated on at
least
one side of the first portion 425 of the dirt chamber outer wall 415.
The position of the fill line F may be based on the performance
characteristics of the cyclone 422 including the height of the cyclone outer
surface 442 or other suitable factors. As exemplified in Figure 20, the
location of
the fill line F may be below the top of the cyclone outer housing 442 and the
dirt
outlet 446 (when the hand vacuum 400 is vertically mounted on the backbone
200). Locating the fill line F below the dirt outlet 446 may reduce the
likelihood of
-23-
CA 02659212 2009-03-20
dirt re-entering the outer cyclone housing 442 and fouling the cyclone 422 or
otherwise interfering with the operation of the hand vacuum 400. Optionally,
the
fill line F may be defined by the edge of the second portion 427 of the dirt
chamber wall 415, instead of a line on the first portion 425.
In the example shown in Figures 20 and 21, the first portion 425 of
the dirt chamber outer wall 415 is transparent (or at least substantially
transparent) to allow a user to see the amount of dirt contained within the
dirt
chamber 424 without having to open or otherwise access the dirt chamber 424.
When the hand vacuum is mounted on the backbone 200, a user looking into the
dirt chamber 424 may be able to compare the height of the dirt in the dirt
chamber 424 to the position of the fill line F to determine if the dirt
chamber 424
is "full". Being able to see the amount of dirt in the dirt chamber 424 may
enable
a user to determine how much capacity remains within the dirt chamber 424, and
accordingly anticipate how much additional cleaning can be completed before
the
dirt chamber 424 needs to be emptied. While the first portion 425 of the dirt
chamber outer wall 415 is preferably transparent to allow a user to see inside
the
dirt chamber 424, the outer cyclone housing 442 is preferably opaque to
conceal
the cyclone 422 and to provide a contrasting background to allow the user to
accurately determine the height of the dirt within the dirt chamber 424.
Due to the operation of the cyclone 422 and configuration of the dirt
outlet 446, it may impede the operation of the vacuum 100 (and the hand
vacuum 400) if the dirt outlet 446 is substantially blocked or occluded by the
accumulated dirt in the dirt chamber 424. To reduce the chances of the dirt
outlet 446 being blocked by dirt the fill line F may be located below the dirt
outlet
446 as exemplified. The position of the fill line F may also be based on a
maximum volume of the dirt chamber below the fill line F so that when the hand
vacuum 400 is operated on its side, as a hand vacuum, the dirt in the dirt
chamber 424 will not completely submerge the cyclone outer housing 442 and
the dirt outlet 446. Optionally, the first portion 425 of the dirt chamber
outer wall
-24-
CA 02659212 2009-03-20
415 may include a second fill line that is oriented to be read when the hand
vacuum 400 is in a sideways orientation. The dirt chamber 424 may also include
a plurality of additional indicator lines, such as a half-full line and a
quarter-full
line.
Despite the presence of the fill line F indicating the maximum
intended capacity of the dirt chamber 424, a user may be tempted to continue
to
operate the vacuum 100 to collect additional dirt, particularly if it appears
that
there is additional dirt storage capacity within the dirt chamber 424 above
the fill
line F, for example dirt chamber volume 448. As described above, filling the
dirt
chamber 424 above the fill line F can impede the operation of the vacuum 100.
Therefore, to deter users from over-filling the dirt chamber 424 (i.e. filling
above
the fill line F), the second portion 427 of the cyclone unit wall 415 is
preferably
opaque (or at least substantially opaque) to visually obscure portions of the
dirt
chamber 424 from the user, as exemplified in Figure 20. Optionally, the first
portion 425 may be partially translucent and partially opaque to further
conceal
the interior of the dirt chamber 424.
The second portion 427 of the dirt chamber outer wall 415 abuts
the first portion 425 at a joint or juncture. The position of the juncture may
be
such that the lowest portion of the juncture (when the hand vacuum 400 is
vertically mounted on the backbone 200) is proximate the fill line F.
Configuring
the dirt chamber 424 in this manner may further deter the user from over-
filling
the dirt chamber 424 because the opaque second portion 427 may create the
illusion that the dirt chamber 424 does not extend much above the fill line F.
This embodiment is particularly preferred. When a user approaches
the vacuum cleaner, they may approach it from the front, as seen in Figure 1.
In
this orientation, the shortest portion of first portion 425 is visible.
Accordingly, if
second portion is an openable lip, and is made from a plastic that is less
translucent then first portion 415, a user may determine to empty the dirt
collection chamber prior to using the vacuum cleaner if the dirt collection
appears
-25-
CA 02659212 2009-03-20
to be full due to dirt extending all the way up to the lowest portion of lid
427. It will
be appreciated that a fill line need not be marked on the dirt collection
chamber
itself.
Cyclone unit 414 may be emptied by any means known in the art.
For example, one of the ends of the cyclone unit 414 may be openable. The
second portion 427 may be a pivotally mounted door to the first portion 425 of
the
cyclone unit wall 415, such that cyclone unit 414 may be opened, and dirt
chamber 424 may be emptied. When second portion 427 is pivoted away from
the remainder of the cyclone unit 414, separation plate 454 also preferably
pivots
away from the remainder of the cyclone unit 414. A securing member such as a
latch 459, a screw mount or the like may be provided, which secures second
portion 427 to the first portion 425 of the wall 415. In alternate examples,
second
portion 427 may be removable from cyclone unit wall 415 (As exemplified in
Figure 21) or the opposed end of the cyclone unit 414 may be openable.
In the example shown, the nozzle 412 is positioned at the lower
portion 406 of the portable cleaning apparatus 400. More preferably, as in the
example shown, nozzle 412 is positioned at the bottom of the portable cleaning
apparatus 400, and is preferably beneath the cyclone unit 414 when used as a
hand vacuum cleaner and is between the cyclone unit 414 and the mount 220
when attached to the backbone 200. Further, as in the example shown, the
nozzle 412 is preferably fixedly positioned at the lower portion 406 of the
portable
cleaning apparatus 400. That is, the nozzle 412 is not movable with respect to
the remainder of the portable cleaning apparatus 400, and is fixed at the
lower
portion 106 of the portable cleaning apparatus 400. As shown in Figures 7 and
8, nozzle 412 has a width WN and, as shown in Figure 11, coupling plate 123
has a width Wp that is generally the same as width WN.
Nozzle 112 exemplifies a particular design for an open sided
nozzle. Open sided nozzle 112 has an open side that faces the surface to be
cleaned when the nozzle is placed against a surface to be cleaned.
Accordingly,
-26-
CA 02659212 2009-03-20
nozzle 112 defines an air flow chamber that has an open lower side. In
operation,
air will flow longitudinally through the air flow chamber to an air exit. It
will be
appreciated that only part of the nozzle may have an open lower side.
Alternately, all of the nozzle, from an air inlet end to the air outlet, may
have an
open lower side. It will be appreciated that various other design may be used.
Referring now to Figures 8-14, nozzle 412 comprises an upper
nozzle wall 426. In the example shown, the upper nozzle wall 426 comprises a
portion 419 of a wall 415 of the cyclone unit. Nozzle 412 further preferably
comprises a depending wall 428 extending downwardly from the upper nozzle
wall 426. The depending wall 428 is generally U-shaped. The height of the
depending wall may vary. The open end of the U-shape defines an open side
wall 430 of the nozzle 414, and forms the dirty air inlet 418 of the portable
cleaning apparatus 400. In the example shown, the open side wall 430 is
provided at the front of the nozzle 414 and forms a portion of a flow passage
that
is in communication with the opening 438. When in use as a hand vacuum,
optional wheels 435 are in contact with a surface and the open side wall 430
sits
above and is adjacent a hard surface to be cleaned. It will be appreciated
that
depending wall 428 may be positioned only rearward of opening 438.
Alternately,
or in addition, depending wall 428 may be provided adjacent the lateral sides
of
opening 438. The depending walls may be discrete walls or they may be joined
together as exemplified. The walls may be continuous or discontinuous.
In the example shown, the lower end 432 of the depending wall
428 defines an open lower end 434 of the nozzle 414. The open lower end 434
extends to the front 408 of the hand vacuum 400, and merges with the open side
430. In use, the open lower end 434 faces a surface to be cleaned. In the
example shown, a plurality of wheels 435 are mounted to the depending wall
428, and extend below the lower end 432 of the depending wall 428.
Accordingly, when in use as a hand vacuum, when wheels 435 are in contact
with a surface, the lower end 432 of the depending wall 428 is spaced from a
-27-
CA 02659212 2009-03-20
surface to be cleaned, and the space between the lower end of the depending
wall 428 and the surface to be cleaned form a secondary dirty air inlet to the
portable cleaning apparatus 400 when used as a hand vacuum.
The upper nozzle wall 426, depending wall 428, and open lower
end 434 of the nozzle 412 define an airflow chamber 436 of the nozzle. An
opening 438 is preferably provided in the upper nozzle wall 426, and is in
communication with the airflow chamber 436. When in use as a hand vacuum,
the wheels 435 are in contact with a surface, the opening 438 faces a surface
to
be cleaned, air enters the dirty air inlet 418, passes horizontally through
the
airflow chamber 436, and passes into the opening 438. Opening 438 is in
communication with a cyclone inlet passage 439, which is in communication with
a cyclone air inlet 440 of cyclone 422. In some embodiments, opening 438 need
not be in upper wall 426.
Nozzle 412 and attachment member 120 are configured such that
attachment member 120 may form part of the air flow conduit to opening 438
when attachment member 120 is mounted to hand vacuum 400. For example,
when the portable cleaning apparatus 400 is used in combination with the
backbone 200 and the surface cleaning head 300, the opening 438 in the nozzle
412 is in sealed, fluid communication with the air outlet 127 of the
attachment
member 120. By way of this connection, a continuous fluid pathway is
established between the dirty air input 310 of the surface cleaning head 300
and
the opening 438.
It will be appreciated that attachment member 120 may be
removably mounted to nozzle 412 by any engagement means known in the
connecting arts. Further, attachment member may be of any configuration.
Attachment member may be part of, or may be connected to, an accessory
cleaning tool by any means, such as a flexible hose. The flexible hose may be
hose 110 if hose 110 is removably mounted to the floor cleaning unit.
-28-
CA 02659212 2009-03-20
As exemplified, attachment member 120 is removably engaged
with nozzle 412 by the engagement of pivoting arms in slots provided on nozzle
412. Accordingly, for example, nozzle 412 may also include a slot 490 defining
a
recess in the depending wall 428 that is adjacent the upper nozzle wall 426.
The
slot 490 preferably extends continuously along the U-shaped portion of the
nozzle depending wall 428 and may be bounded at each end by corners 492.
The attachment member 120 includes two arms 150 each having a shoulder 154
and being pivotally connected to the coupling plate 123 using pins 156
(alternatively, the arms 150 could be resilient). Figure 14 is a partially
exploded
view of the attachment member 120, illustrating one example of the rotational
connection between the coupling 142 and the collar 140. In the example shown,
the coupling 142 comprises a cylindrical body wall that passes through an
opening in the collar 140. Once the coupling 142 had been inserted into the
collar 140 it is retained using fastening clip 143. The combination of the
coupling
plate 123 and the arms 150 may also be described as connecting portion,
mounting portion or nozzle mounting portion of the attachment member 120.
In order to assemble the mount on nozzle 412, coupling plate 123
may be slid into the open end of airflow chamber 436. Accordingly, when the
coupling plate 123 of the attachment portion 120 is slid into the airflow
chamber
436, the arms 150 are pressed together by the nozzle 412 walls until the point
when arms 150 are aligned with slot 190 (i.e. when the shoulders 154 are
advanced past the corners 192). When the arms 150 are aligned with the slot
190, the attachment member 120 is "clicked-in" or locked in place when the
arms
150 spread apart and the shoulders 154 of the arms 150 become lodged behind
the corners 192 of slot 190. The arms 150 may be manually separated or the
attachment member may include a biasing means (not shown) that biases the
arms 150 apart. With the arms 150 in the spread configuration the attachment
member 120 cannot be slidingly removed from the nozzle 412. When a user
wishes to detach the attachment means 120 from the nozzle 412 the user may
-29-
CA 02659212 2009-03-20
squeeze upstanding tabs 152 together thereby allowing the shoulders 154 to
slide past the corners 192. The mount may alternately be inserted by squeezing
upstanding tabs 152 together so that plate 123 may be inserted in chamber 436.
When the hand vacuum 400 is coupled to the attachment member
120 the airflow chamber 436 may receive, and be partially filled with the
coupling
plate 123 of the attachment portion 120. The coupling plate 123 is preferably
shaped to be slidingly received within the airflow chamber 436.
Insertion of the coupling plate 123 into the airflow chamber 436
serves to register the air outlet 127 with the nozzle opening 438. As shown,
the
air outlet 127 has a width Wo and a length Lo that are preferably the same as
the
width Wo and a length Lo of the opening 438. A sealing gasket 123 may
provided at the juncture of the openings.
The attachment member 120 and the nozzle 412 may also include
a plurality of magnets 158 that magnetically couple the attachment member 120
to the nozzle 412 to improve the connection between them and ensure that air
outlet 127 is properly registered with opening 438. It will be appreciated
that, in
an alternate embodiment, only magnets maybe used. Other mounting means
may be used. For example, a plurality of latches may be used or air outlet 127
may extend into opening 438.
Optionally, when the attachment member 120 is coupled to the
portable cleaning apparatus 400, the upstream end of the air conduit 110 (for
example hose 124) can be detached from the surface cleaning head 300 and the
combination of the attachment member 120 and the flexible hose 124 (decoupled
from the surface cleaning head 300) can serve as an auxiliary or accessory
cleaning tool. The free end of the hose 124 may be maneuvered by the user to
clean objects and surfaces that cannot be cleaned using the surface cleaning
head 300. In some examples, the upstream end of the flexible hose 124 may be
connected to the auxiliary cleaning tool 112. Alternatively, the flexible hose
124
-30-
CA 02659212 2009-03-20
may be removed from the attachment member 120 and the auxiliary cleaning tool
112 may be mounted directly to the air inlet 126 of the attachment member 120.
It will be appreciated that tool 112 may have a plate 123 and arms 150
provided
at the coupling end thereof.
Optionally, the attachment member 120 may be removed from the
nozzle 412 and the auxiliary cleaning tool 112 may be fitted directly to the
nozzle
412, without the use of a flexible hose 124 or other type intermediate air
conduit.
In addition to the auxiliary or accessory cleaning tool 112, the nozzle 412
may be
directly connected to any one of a number of cleaning tools that have been
provided with the an appropriate attachment member, including wands, brushes,
crevasse tools and other hoses.
Clean air outlet 420 is provided downstream of the cyclone unit
414, suction motor and optional post-motor filter contained optionally within
the
cleaner body 460. Clean air outlet 420 may comprise a plurality of apertures
formed in housing 461. The cleaner body 460 may also contain one or more of a
separation plate, a dirt chamber a pre-motor filter and a plurality of
connecting
fluid conduits or passageways.
In the example shown, cleaner body 460 is removably mounted to
head portion 416. For example, cleaner body 460 may be entirely removable
from head portion 416, or pivotably mounted to head portion 416. Accordingly,
cleaner body 460 and head portion 416 may be separated in order to provide
access to the interior of cleaner body 460 or head portion 416. This may allow
a
pre-motor filter to be cleaned, changed, or serviced, or the motor to be
cleaned,
changed or serviced. Alternately, head portion 416 may be cleaned or serviced.
For example, any dirt stuck in the enclosed passages portable cleaning
apparatus 400 may be removed. Alternately, a replacement cleaner body 460 or
head portion 416 may be provided, and may be mounted to an existing head
portion 416 or cleaner body 460, respectively.
-31-
CA 02659212 2009-03-20
One or more additional rear wheels 480 may be mounted to
housing 461 at lower portion 406, and may be used in conjunction with wheels
435 when the portable cleaning apparatus 400 is used as a hand vacuum. When
the portable cleaning apparatus 400 is attached to the backbone 200 the
additional wheel 480 preferably engages with the mount bracket 224 and
partially
supports the portable cleaning apparatus 400 on the handle 210 as described
above.
Preferably, as exemplified, the portion of the attachment member
120 that is used to mount the attachment member to the backbone may also
comprise part of the air flow path from surface cleaning head 300 to hand
vacuum cleaner 400. For example, the attachment member 120 may include a
mounting portion or collar 140 that includes a coupling 142 and defines a
channel
144. The collar 140 is connected to the airflow passageway 128, or
alternatively
may be connected directly to the air conduit 110. Optionally, the coupling 142
is
a rotatable coupling that allows the airflow passageway 128 to rotate relative
to
the collar 140. The upstream end of the airflow passageway 128 defines the air
inlet 126. In operation, the air inlet 126 is preferably coupled to the
airflow
conduit 110 that extends to the surface cleaning head 300 (the flexible air
hose
124 in the example shown). The air inlet 126 is releasably coupled to the
flexible
air hose by clips 160. Downstream of the coupling 142 an enclosed airflow
passage connects the airflow passage 128 to the air outlet 127. It will be
appreciated that the attachment member 120 need not comprise part of the air
flow passage. For example, coupling 142 may be located out of the flow path
defined by passageway 128. Alternately, plate 123 need not have opening 127.
Accordingly, attachment member may have a first part that is secured to hand
vacuum 400 and a second distinct part that completes that air flow passage
from
surface cleaning head 300 to opening 438.
-32-
CA 02659212 2009-03-20
The airflow passageway 128 may be flexible or rigid and may be
generally straight or may have a curved shape, as shown. Preferably, the
curved
airflow passageway 128 subtends fewer than 45 degrees.
It will be appreciated that a construction that uses a dirt collection
chamber that partially or completely surrounds a cyclone in an upright surface
cleaning apparatus may be used by itself or with any other feature disclosed
herein. It will be appreciated that an inverted first stage cyclone in an
upright
surface cleaning apparatus may be used by itself or with any other feature
disclosed herein. In addition, any of the features disclosed herein may be
used
by themselves, or with any other feature, and may include the construction of
the
dirt collection chamber to denote a fill line.
What has been described above has been intended to be
illustrative of the invention and non-limiting and it will be understood by
persons
skilled in the art that other variants and modifications may be made without
departing from the scope of the invention as defined in the claims appended
hereto.
-33-
