U.S. patent application number 15/270897 was filed with the patent office on 2017-05-11 for extractor cleaning machine.
The applicant listed for this patent is AC (Macao Commercial Offshore) Limited. Invention is credited to John Bantum, Rafael Davila, Marlee Poitinger, Michael Wright.
Application Number | 20170127900 15/270897 |
Document ID | / |
Family ID | 57113725 |
Filed Date | 2017-05-11 |
United States Patent
Application |
20170127900 |
Kind Code |
A1 |
Wright; Michael ; et
al. |
May 11, 2017 |
EXTRACTOR CLEANING MACHINE
Abstract
An extractor including a housing, a suction source disposed
within the housing, and a suction nozzle in communication with the
suction source and movable relative to the housing. The extractor
also includes a recovery tank carried by the housing, and the
suction source is in communication with the recovery tank for
drawing fluid through the suction nozzle and storing the drawn
fluid in the recovery tank. A cleaning chamber disposed on the
housing receives a portion of the suction nozzle, and the cleaning
chamber is configured to selectively receive a fluid along a fluid
flow path in communication with the cleaning chamber.
Inventors: |
Wright; Michael; (Wadsworth,
OH) ; Bantum; John; (Munroe Falls, OH) ;
Poitinger; Marlee; (Cleveland, OH) ; Davila;
Rafael; (Charlotte, NC) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
AC (Macao Commercial Offshore) Limited |
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|
|
|
|
Family ID: |
57113725 |
Appl. No.: |
15/270897 |
Filed: |
September 20, 2016 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
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62253920 |
Nov 11, 2015 |
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Current U.S.
Class: |
1/1 |
Current CPC
Class: |
A47L 11/4008 20130101;
A47L 11/34 20130101; A47L 11/30 20130101; A47L 11/4083 20130101;
A47L 11/4036 20130101; A47L 11/4088 20130101; A47L 11/4016
20130101 |
International
Class: |
A47L 11/30 20060101
A47L011/30; A47L 11/40 20060101 A47L011/40 |
Claims
1. An extractor comprising: a housing; a suction source disposed
within the housing; a suction nozzle in communication with the
suction source and movable relative to the housing; a recovery tank
carried by the housing, wherein the suction source is in
communication with the recovery tank for drawing fluid through the
suction nozzle and storing the drawn fluid in the recovery tank;
and a cleaning chamber with the housing for receiving at least a
portion of the suction nozzle, wherein the cleaning chamber is
configured to selectively receive a fluid along a fluid flow path
in communication with the cleaning chamber.
2. The extractor of claim 1, wherein the fluid flow path provides
fluid communication between a supply tank and the cleaning
chamber.
3. The extractor of claim 2, wherein the supply tank is removably
coupled to the housing.
4. The extractor of claim 2, further comprising a fluid inlet port
in fluid communication with the cleaning chamber, wherein the
cleaning chamber is configured to selectively receive fluid from
the supply tank, the fluid inlet port, or a combination of the
supply tank and the fluid inlet port.
5. The extractor of claim 4, where the fluid inlet port is
configured to selectively receive fluid from a container.
6. The extractor of claim 4, wherein the fluid flow path provides
fluid from the supply tank, the fluid inlet port, or a combination
of the supply tank and the fluid inlet port, to the recovery tank
when the portion of the suction nozzle is received in the cleaning
chamber.
7. The extractor of claim 6, wherein the suction source is in
communication with the hose for drawing the cleaning fluid from the
supply tank through the second fluid flow path and the hose to the
recovery tank when the portion of the suction nozzle is received in
the cleaning chamber.
8. The extractor of claim 2, wherein the fluid flow path provides
fluid from the supply tank to the recovery tank when the portion of
the suction nozzle is received in the cleaning chamber.
9. The extractor of claim 8, further comprising a hose between the
suction source and the suction nozzle.
10. The extractor of claim 1, further comprising a fluid inlet port
in fluid communication with the fluid flow path.
11. The extractor of claim 10, wherein the fluid flow path provides
fluid communication from the fluid inlet port to the recovery tank
when the portion of the suction nozzle is received in the cleaning
chamber.
12. The extractor of claim 1, wherein the suction source is in
communication with the cleaning chamber for drawing the cleaning
fluid from the supply tank through the fluid flow path to the
recovery tank when the portion of the suction nozzle is received in
the cleaning chamber.
13. The extractor of claim 1, further comprising a hose between the
suction source and the suction nozzle.
14. The extractor of claim 1, wherein the supply tank includes a
first fluid tank for storing a first fluid, and a second fluid tank
for storing a second fluid.
15. The extractor of claim 14, further comprising a user-selectable
mode valve assembly, the mode valve assembly including a valve
selectively switching between a first mode connecting the first
fluid tank to the fluid flow path and a second mode connecting the
sanitizing fluid tank to the fluid flow path.
16. The extractor of claim 15, wherein the mode valve assembly
includes a first inlet port in communication with the first fluid
tank, a second inlet port in communication with the second fluid
tank, the valve connecting the first fluid tank and the second
fluid tank with an outlet port in communication with the fluid flow
path.
17. The extractor of claim 15, wherein the mode valve assembly
includes a third mode connecting the first fluid tank and second
fluid tank to the fluid flow path.
18. The extractor of claim 15, further comprising a fluid delivery
system in communication with the fluid flow path that selectively
delivers fluid to a surface to be cleaned.
19. The extractor of claim 18, wherein the fluid delivery system is
at least partially supported by the suction nozzle.
20. The extractor of claim 1, further comprising a fluid delivery
system in communication with the fluid flow path that selectively
delivers fluid to a surface to be cleaned.
21. The extractor of claim 20, wherein the fluid delivery system is
at least partially supported by the suction nozzle.
22. The extractor of claim 1, wherein the cleaning chamber includes
a valve configured to selectively permit introduction of the
cleaning fluid into the cleaning chamber.
23. The extractor of claim 22, wherein the valve includes a plunger
actuatable between a first position to inhibit the cleaning fluid
from entering the cleaning chamber, and a second position to permit
the cleaning fluid to enter the cleaning chamber.
24. The extractor of claim 23, wherein the plunger is forced by a
spring toward the first position, and the suction nozzle moves the
plunger toward the second position when the portion of the suction
nozzle is inserted into the cleaning chamber.
25. The extractor of claim 1, wherein the suction nozzle is a
cleaning tool, and the cleaning chamber receives the cleaning tool,
wherein the cleaning chamber includes at least one spray for
spraying fluid toward the cleaning tool within the cleaning
chamber.
26. The extractor of claim 1, further comprising a plurality of
cleaning tools, wherein the cleaning chamber receives the plurality
of cleaning tools and the portion of the suction nozzle.
27. The extractor of claim 1, wherein the fluid flow path is in
communication with a pump providing fluid to the cleaning
chamber.
28. The extractor of claim 1, wherein a controller deactivates the
suction source in response to one or more inputs selected from a
group consisting of a user actuated switch, amount of fluid in the
supply tank, amount of fluid in the recovery tank, time, and air
pressure in the system.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This applications claims priority to co-pending, prior-filed
U.S. Provisional Patent Application No. 62/253,920, filed Nov. 11,
2015, the entire contents of which are hereby incorporated by
reference.
BACKGROUND
[0002] The present invention relates to extractor cleaning machines
and, more particularly, to self-cleaning extractor cleaning
machines.
[0003] Typically, extractor cleaning machines include components
for applying a fluid to a surface and extracting the fluid from the
surface. For example, extractor cleaning machines may include a
fluid distribution system, an agitator brush, a pump, and a suction
fan. The agitator brush is used to scrub the surface being cleaned.
The suction fan generates a vacuum force that draws in fluid, dirt,
or waste from the surface being cleaned. Some extractor machines
include an accessory hose assembly and tools to clean above-floor
surfaces. For example, the accessory tools may be used for cleaning
drapes, steps, and furniture. The accessory hose assembly provides
a conduit for drawing fluid and dirt from the surface to the
extractor and sometimes also distributes cleaning fluid using a
pump.
SUMMARY
[0004] In one embodiment, the invention provides an extractor
including a housing, a suction source disposed within the housing,
and a suction nozzle in communication with the suction source and
movable relative to the housing. The extractor also includes a
recovery tank carried by the housing, and the suction source is in
communication with the recovery tank for drawing fluid through the
suction nozzle and storing the drawn fluid in the recovery tank. A
cleaning chamber disposed on the housing receives a portion of the
suction nozzle, and the cleaning chamber is configured to
selectively receive a fluid along a fluid flow path in
communication with the cleaning chamber.
[0005] Other aspects of the invention will become apparent by
consideration of the detailed description and accompanying
drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
[0006] FIG. 1 is a front perspective view of an extractor in
accordance with one embodiment of the invention.
[0007] FIG. 2 is a rear perspective view of the extractor of FIG.
1.
[0008] FIG. 3 is a perspective view of an accessory tool of the
extractor of FIG. 1.
[0009] FIG. 4 is a perspective view of the extractor of FIG. 1,
illustrating a supply tank removed from a housing of the
extractor.
[0010] FIG. 5 is a schematic view of a portion of the extractor of
FIG. 1, illustrating a supply tank, a mode valve assembly, and a
cleaning chamber.
[0011] FIG. 6 is a perspective view of an extractor in accordance
with another embodiment of the invention.
[0012] FIG. 7 is a perspective view of an extractor in accordance
with another embodiment of the invention.
[0013] FIG. 8 is an exploded perspective view of the cleaning
chamber valve of the extractor of FIG. 1.
[0014] FIG. 9 is a cross-sectional perspective view of the cleaning
chamber valve of FIG. 8.
[0015] FIG. 10 is a cross-sectional view of a portion of the
extractor taken along line 10-10 of FIG. 4, illustrating a suction
nozzle being inserted into the cleaning chamber.
[0016] FIG. 11 is an exploded view of the mode valve assembly of
the extractor of FIG. 1.
[0017] FIG. 12 is a cross-section view of the mode valve assembly
taken along line 12-12 of FIG. 11, illustrating the mode valve
assembly in a first position.
[0018] FIG. 13 is a similar cross-section view as FIG. 12,
illustrating the mode valve assembly in a second position.
[0019] FIG. 14 is a similar cross-section view as FIG. 12,
illustrating the mode valve assembly in a third position.
[0020] FIG. 15 is a schematic of a portion of an extractor
according to another embodiment of the invention.
[0021] FIG. 16 is a cross-section view of a portion of the
extractor of FIG. 15.
[0022] FIG. 17 is a schematic of a portion of an extractor
according to another embodiment of the invention.
[0023] FIG. 18 is a schematic of a portion of an extractor
according to another embodiment of the invention.
[0024] FIG. 19 is a schematic of a portion of an extractor
according to another embodiment of the invention.
DETAILED DESCRIPTION
[0025] Before any embodiments of the invention are explained in
detail, it is to be understood that the invention is not limited in
its application to the details of construction and the arrangement
of components set forth in the following description or illustrated
in the following drawings. The invention is capable of other
embodiments and of being practiced or of being carried out in
various ways. Also, it is to be understood that the phraseology and
terminology used herein is for the purpose of description and
should not be regarded as limiting. Use of "including" and
"comprising" and variations thereof as used herein is meant to
encompass the items listed thereafter and equivalents thereof as
well as additional items. Use of "consisting of" and variations
thereof as used herein is meant to encompass only the items listed
thereafter and equivalents thereof. Unless specified or limited
otherwise, the terms "mounted," "connected," "supported," and
"coupled" and variations thereof are used broadly and encompass
both direct and indirect mountings, connections, supports, and
couplings.
[0026] FIG. 1 illustrates an extractor cleaning machine 20
(hereinafter referred to simply as an "extractor"). In the
illustrated embodiment, the extractor 20 is typically referred to
as a portable, a handheld, or canister-type extractor that is
operable to clean a surface such as, for example, a floor. In other
embodiments, the extractor 20 may be, for example, an upright
extractor. In some embodiments, the extractor 20 is adapted to
clean a variety of surfaces, such as carpets, upholstery, curtains,
hardwood floors, tiles, or the like. The extractor 20 typically
distributes or sprays a cleaning fluid (e.g., water, sanitizer,
detergent, or a mixture of water and sanitizer or detergent) onto
the surface to clean the surface. The extractor 20 then draws the
cleaning fluid and dirt off of the surface, leaving the surface
relatively clean.
[0027] The illustrated extractor 20 includes a housing 22, a supply
tank 24 for storing a cleaning fluid, and a recovery tank 26 for
storing dirty fluid. Both the supply tank 24 and the recovery tank
26 are carried by the housing 22. A handle 28 is coupled to the
housing 22 to facilitate moving and carrying the extractor 20. The
extractor 20 also includes a suction source 29 (shown in broken
lines in FIG. 1) supported by and disposed within the housing. The
suction source 29 is driven by a motor 31 (shown schematically in
broken lines in FIG. 1) that is powered (by line or battery) to
selectively drive the suction source 29. The suction source 29 is
operable to draw the cleaning fluid and dirt from the surface.
Specifically, the suction source 29 is in communication with the
recovery tank 26 for storing the drawn cleaning fluid and dirt in
the recovery tank 26. The extractor 20 further includes a hose end
30 in communication with the suction source 29 and moveable
relative to the housing 22 (FIG. 2). The hose end 30 is extended
from the suction source 29 via a hose 32. When left exposed, the
hose end 30 is a suction nozzle. The hose end 30 may be gripped by
an operator for movement of the hose 32 and hose end 30 for
cleaning. The hose end 30 may include a check valve that inhibits
liquid from flowing back out the hose end 30 when the suction
source 29 is turned off. The check valve may include an elastomeric
flap or flaps and the like. In some embodiments, the check valve
may include a duckbill type check valve.
[0028] With reference to FIGS. 2 and 3, the extractor 20 may
include an accessory tool 34 for cleaning the surfaces and when
connected to the hose end 30 the accessory tool 34 is in
communication with the suction source 29. In one embodiment
illustrated in FIG. 2, the accessory tool 34 may be stored on the
housing 22 when not in use. While in use and attached to the hose
end 30, an operator can grip the hose end 30, the accessory tool
34, or both to move the accessory tool 34 for cleaning. The
accessory tool 34 includes a cleaning head 40 with an intake nozzle
44 that operates as a suction nozzle when connected to the hose end
30 for drawing dirty fluid from a surface. In the illustrated
embodiment, the cleaning head 40 includes a non-powered agitator,
e.g., a brush 46, to help scrub or otherwise clean a surface. Also,
the cleaning head 40 of the illustrated embodiment is removable
from the accessory tool 34 such that different cleaning heads
(i.e., 40a, 40b, etc.) can be used to clean surfaces (e.g.,
furniture, drapes, steps, etc.). In other embodiments, the cleaning
head 40 may include a motor or turbine-powered agitator and/or
removable or non-removable cleaning heads.
[0029] With reference to FIGS. 4 and 5, the supply tank 24 of the
extractor 20 is removably coupled to the housing 22. The supply
tank 24 may be retained via a latch mechanism 48. Similarly, the
recovery tank 26 is also removably coupled to the housing 22. The
recover tank 26 may be retained via a separate latch mechanism 50.
As such, the supply tank 24 and the recovery tank 26 can easily be
filled and/or emptied by an operator at a remote location.
Optionally, as in the embodiment shown in FIG. 5, the supply tank
24 may include two or more compartments, such as a sanitizing fluid
tank 52 for storing a sanitizing fluid, and a cleaning fluid tank
54 for storing a cleaning fluid such as water, detergent, or a
mixture of water and detergent. As best illustrated in FIG. 5, the
sanitizing fluid tank 52 includes a sanitizing fluid inlet 56 to
allow sanitizing fluid to enter the sanitizing fluid tank 52, and a
sanitizing fluid outlet 58 to discharge sanitizing fluid from the
sanitizing fluid tank 52. Similarly, the cleaning fluid tank 54
includes a cleaning fluid inlet 60 to allow cleaning fluid to enter
the cleaning fluid tank 54, and a cleaning fluid outlet 62 to
discharge cleaning fluid from the cleaning fluid tank 54. The
sanitizing fluid outlet 58 and the cleaning fluid outlet 62 include
valves (not shown) that automatically open when the supply tank 24
is attached to the housing 22 and that automatically close when the
supply tank 24 is removed from the housing 22, as in one example,
poppet valves. In another embodiment, one or more of the fluid
supply tank 24 and recovery tank 26 are not removably coupled to
the extractor cleaning machine 20, instead being configured for
filling and emptying on the extractor 20.
[0030] In the embodiment shown in FIG. 6, the extractor 220
includes a container inlet 263 in fluid communication with the
cleaning chamber 268, the pump 64, or both, such that a container
265 receivable in the container inlet 263 is the supply tank 224,
or is in addition to the supply tank 224. The container inlet 263
may be configured to receive a single-use container purchased at a
retail or other commercial outlet, or a re-fillable container, or
other container for providing fluid to the extractor 220. For
convenience, the extractor 220 including its supply tank 224 and
fluid delivery system are stated and described using cleaning fluid
and sanitizing fluid; however, the extractor 220 is not limited.
All of the components of the extractor 220 may be configured to
provide water, detergent, stain releaser, cleaner, sanitizer,
maintainers, finishes, other fluids, or any mixture or mixtures
thereof. In other embodiments such as FIG. 7, the extractor 320
includes a fluid inlet port 386 in fluid communication with the
cleaning chamber 368. In this embodiment, the cleaning chamber 368
is configured to selectively receive fluid from the supply tank
324, the fluid inlet port 386, or a combination of the supply tank
324 and the fluid inlet port 386. The fluid inlet port 386 may be a
hose connector configured for connecting a hose from a household
plumbing fixture or faucet. Alternatively, the fluid inlet port 386
may be configured as a container inlet to receive fluid from a
single-use container purchased at a retail or other commercial
outlet, or a re-fillable container, or other container for
providing fluid to the extractor 320.
[0031] With continued reference to FIG. 5, the extractor 20 further
includes a fluid delivery system. The fluid delivery system
includes a pump 64 that is in fluid communication with the supply
tank 24 and further in communication with a switch (not shown). The
switch is configured to deactivate the pump 64 and the suction
source 29 in a first state. Otherwise, when the switch is in a
second state, the fluid delivery system is enabled to selectively
deliver cleaning fluid from the supply tank 24 through the pump 64,
such as to the surface to be cleaned, along a first fluid flow path
66, which may include a tube or conduit, and through a distribution
nozzle 42. The distribution nozzle 42 may be positioned adjacent
the hose end 30 for distribution of fluid adjacent the accessory
tool 34 when the accessory tool 34 is attached to the hose end 30,
for example. Alternatively, the distribution nozzle 42 may be
independent of the hose 32 attached to the housing 22 or remote
from the housing 22. In the illustrated embodiment, the first fluid
flow path 66 is supported along the hose 32 in order to be in
communication with the distribution nozzle 42 on the hose end 30.
As shown in FIG. 3, the hose end 30 includes a trigger 38 that,
when depressed, activates the pump 64 to provide cleaning fluid
through the distribution nozzle 42 from the supply tank 24. In an
alternative embodiment, a controller is configured to deactivate
and activate the pump 64 and the suction source 29 in response to
one or more inputs such as the trigger 38 or a mode valve assembly
88 (FIG. 1) being actuated, amount of fluid in the supply tank 24
and/or recovery tank 26, pressure in the system, or other
variables.
[0032] The illustrated extractor 20 is configured for the hose 32
to draw fluid from the supply tank 24, and optionally other
sources, to flush fluid through the hose 32. With reference to
FIGS. 8-10, the extractor 20 further includes a cleaning chamber
68. The cleaning chamber 68 is disposed on the housing 22 and is
capable of receiving a portion of the hose end 30 (FIG. 10). The
cleaning chamber 68 is configured to selectively receive fluid,
such as one or more of the detergent fluid and the sanitizing fluid
along a second fluid flow path 70 of the fluid delivery system. The
extractor 20 further includes a cleaning chamber valve 72 (FIG. 8)
configured to selectively permit introduction of the cleaning fluid
into the cleaning chamber 68. The cleaning chamber valve 72
includes a valve housing 74 configure to receive at least a portion
of the hose end 30, and a plunger 76 that is actuatable between a
closed position to inhibit the cleaning fluid from entering the
cleaning chamber 68, and an open position to permit the cleaning
fluid to enter the cleaning chamber 68. In the illustrated
embodiment, the plunger 76 has an outer diameter that is less than
the inner diameter of the valve housing 74 such that an annular or
other shaped gap exists between the plunger 76 and the valve
housing 74. The cleaning chamber valve 72 further includes a port
that is in communication with the supply tank 24. As shown in FIG.
9, the port may be integrally formed in a port housing 78. A spring
80 of the cleaning chamber valve 72 is interposed between the
plunger 76 and a wall or surface opposite the plunger 76, such as
the port housing 78 as shown in FIG. 9, to force the plunger 76
toward the closed position. In the illustrated embodiment,
inserting the hose end 30 into the valve housing 74 actuates the
plunger 76. The hose end 30 moves the plunger 76 toward the open
position compressing the spring 80 when the hose end 30 is inserted
into the cleaning chamber 68 (FIG. 10). In one alternative, not
shown, the hose end 30 seals against the valve housing 74. Suction
at the hose end 30 provided by the suction source 29 draws fluid
along the second fluid flow path 70 extracting the cleaning fluid
from the supply tank 24 and into the cleaning chamber 68. In turn,
the cleaning fluid continues through the hose end 30, the hose 32,
and into the recovery tank 26 flushing fluid through the hose end
30 and the hose 32 for purposes of at least partially cleaning the
hose 32. In alternative embodiments, the plunger 76 may be actuated
by an actuator operably connected a switch, lever, controller, or
other mechanism for moving the plunger 76 between the closed
position and the open position. In alternative embodiments, the
port housing 78 is welded to, attached to, molded with, or
otherwise integral with the valve housing 74.
[0033] The cleaning chamber valve 72 further includes one or more
rubber gaskets or O-rings (i.e., a plunger seat gasket 84) to close
the cleaning chamber valve 72 when the hose end 30 is not inserted
in the cleaning chamber 68. Other gaskets or seals (not shown) may
be provided as desired to prevent leakage of the cleaning fluid
into or out of the cleaning chamber 68 and maintain suction in the
cleaning chamber valve 72 when the hose end 30 is positioned in the
cleaning chamber 68 suction and the suction source 29
activated.
[0034] With reference to FIGS. 11-14, the extractor 20 further
includes the mode valve assembly 88. The mode valve assembly 88
includes a mechanical valve 92 for selectively switching between a
first position corresponding to a first mode (i.e., a deactivated
suction mode) in which the suction source 29 is deactivated, a
second position corresponding to a second mode (i.e., a wash mode)
connecting the fluid delivery system to the cleaning fluid tank 54,
and a third position corresponding to a third mode (i.e., a
sanitize mode) connecting the fluid delivery system to the
sanitizing fluid tank 52. The mode valve assembly 88 includes a
first inlet port 102 in communication with the sanitizing fluid
tank 52, a second inlet port 106 in communication with the cleaning
fluid tank 54. The mode valve assembly 88 selectively connects the
sanitizing fluid tank 52 and the cleaning fluid tank 54 with an
outlet port in communication with the fluid flow path 66. In the
illustrated embodiment, the mechanical valve 92 of the mode valve
assembly 88 includes a valve cap 94, and a valve body 96 coupled to
the valve cap 94 for at least partially supporting a first gate
valve 98 and a second gate valve 100. As best illustrated in FIG.
12, the first gate valve 98 has the inlet port 102 in communication
with the supply tank 24, and an outlet port 104 downstream of the
inlet port 102 and in communication with the fluid delivery system
and the cleaning chamber 68. Similarly, the second gate valve 100
has the inlet port 106 in communication with the supply tank 24,
and an outlet port 108 downstream of the inlet port 106 and in
communication with the fluid delivery system and the cleaning
chamber 68. The outlet ports 104, 108 are in communication with
each other. The first gate valve 98 includes a gate 110, and the
second gate valve 100 also includes a gate 112, in which each gate
110, 112 is forced by springs 114, 116 toward a closed position.
The mode valve assembly 88 includes a mode knob 90 that is
user-manipulable and supported by the housing 22 to actuate the
valve.
[0035] The mode knob 90 includes a cam body 118 (FIGS. 13 and 14)
that protrudes away from the underneath-side of the mode knob 90
toward the valve body 96. The cam body 118 is selectively
enagageable with the gate 110 of the first gate valve 98 and the
gate 112 of the second gate valve 100 such that the cam body 118 is
capable of imparting a force on the each gate 98, 110 to actuate
each gate 98, 100 toward an open position. Further, the mode knob
90 is engageable with a micro-switch 120 (e.g., a limit switch) of
the mode valve assembly 88 to electrically communicate with the
motor 31 of the suction source 29 and the pump 64 of the fluid
delivery system such that the mode knob 90 is capable of activating
and deactivating the motor 31 and the pump 64 (FIG. 11).
Specifically, the mode knob 90 engages the micro-switch 120 in the
first position to deactivate the motor 31 and the pump 64, whereas
the mode knob 90 engages the micro-switch 120 in the second
position and third position to activate the motor 31 and the pump
64. In other embodiments, the micro-switch 120 may be supported by
the housing 22 of the extractor 20 and user-manipulable such that
an operator can directly depress the micro-switch 120 and control
operation of the motor 31 and the pump 64.
[0036] During use, an operator manipulates (e.g., rotates) the mode
knob 90 away from the deactivated suction mode, in which the gates
110, 112 of the first gate valve 98 and the second gate valve 100
are forced by the springs 114, 116 in the closed position. To wash
or sanitize the surface, an operator rotates the mode knob 90 to
the wash mode or the sanitize mode, respectively. When the mode
knob 90 is rotated, for example, to the wash mode, the motor 31 and
the pump 64 are activated and the cam body 118 moves the gate 110
of the first gate valve 98 toward the open position to permit the
detergent fluid to flow through the gate 110 from the cleaning
fluid tank 54 while the gate 112 of the second gate valve 100 is in
the closed position (FIG. 13). Conversely, when an operator rotates
the mode knob 90, for example, to the sanitize mode, the motor 31
and the pump 64 remain activated and the cam body 118 moves the
gate 112 of the second gate valve 100 toward the open position to
permit the sanitizing fluid to flow through the gate 112 from the
sanitizing fluid tank 52 while the gate 110 of the first gate valve
98 is in the closed position (FIG. 14). As such, the cleaning fluid
(i.e., detergent fluid or sanitizing fluid) flows along the first
fluid path 66 and is pumped by the pump 64 onto the surface to be
cleaned through the distribution nozzle 42 (if the trigger 38 is
depressed). If the trigger 38 is not depressed, the pump 64 may
continue to operate, but the cleaning fluid is not discharged from
the distribution nozzle 42. The suction source 29 simultaneously
draws dirty fluid and waste from the surface through the hose end
30 where the recovery tank 26 receives and stores the dirty fluid
and waste. However, some dirty fluid and waste may remain on the
hose end 30 and/or hose 32 after cleaning the surface. Therefore,
the cleaning chamber 68 is provided to wash or flush (e.g.,
sanitize) the hose end 30 and hose 32 in wash mode or sanitize
mode, respectively.
[0037] In order to wash or flush the hose end 30, an operator
inserts the hose end 30 into the cleaning chamber 68. Subsequently,
the plunger 76 moves toward the open position to introduce the
cleaning fluid (i.e., the detergent fluid or the sanitizing fluid)
into the cleaning chamber 68. The cleaning fluid flows through the
supply tank 24, the second fluid flow path 70, the port housing 78,
and the gap between the plunger 76 and the valve housing 74. The
cleaning fluid is provided to the cleaning chamber 68 at least
partially by gravity and suction from the suction source 29. In
other embodiments, the cleaning fluid may be supplied to the
cleaning chamber 68 via the pump 64 of the fluid delivery system,
either individually or in combination with suction from the suction
source 29.
[0038] FIG. 15 illustrates a portion of the extractor 420 having a
cleaning chamber 468 according to another embodiment. The extractor
420 is similar to the extractor 20 described above with reference
to FIGS. 1-12, and similar parts have been given the same reference
number plus 400. Only differences between the embodiments are
described.
[0039] As shown in FIGS. 15 and 16, the cleaning chamber 468 of the
illustrated embodiment includes a duckbill valve 472 instead of the
cleaning chamber valve 72 to selectively permit introduction of the
cleaning fluid into the cleaning chamber 468. The duckbill valve
472 includes a first end having an opening, and an intermediate
portion that converges toward a second end having a flat gate. The
duckbill valve 472 is disposed within the cleaning chamber 468 in
communication with the supply tank 424 via the second fluid flow
path 470. The flat gate of the duckbill valve 472 is moveable
between a closed or "default" position, in which fluid is inhibited
to flow (i.e., prevent backflow from the supply tank 424 to the
cleaning chamber 468), and an open position, in which fluid is
permitted to flow.
[0040] In operation, the hose end 430 is inserted in the cleaning
chamber 468. Suction at the hose end 430 provided by the suction
source draws fluid along the fluid flow path 470 through the
duckbill valve. As such, the cleaning fluid is permitted to enter
the hose end 430. Alternatively or additionally, the cleaning fluid
is supplied to the cleaning chamber 468 via the pump 464 of the
fluid delivery system.
[0041] FIG. 17 illustrates a portion of the extractor 520 having a
cleaning chamber 568 according to another embodiment. The extractor
520 is similar to the extractor 20 described above with reference
to FIGS. 1-12, and similar parts have been given the same reference
number plus 500. Only differences between the embodiments are
described.
[0042] As shown in FIG. 17, the cleaning chamber 568 of the
illustrated embodiment is in communication with the second fluid
flow path 570 and the supply tank 3524 without a valve disposed
therebetween. Specifically, the second fluid flow path 570 is open
to air. In this case, the pump 564 does not feed the cleaning fluid
to the cleaning chamber 568. Rather, the suction at the hose end
530 provided by the suction source 29 is utilized for drawing the
cleaning fluid from the supply tank 524 to the cleaning chamber 568
when the hose end 530 is disposed in the cleaning chamber 568.
Also, gravity may work alone or in combination with the suction
source 529 to provide a gravity feed of the cleaning fluid into the
cleaning chamber 568. The pump 564 is a centrifugal pump and is
utilized strictly to feed the cleaning fluid along the first fluid
flow path 566 toward the accessory tool 534. Occasionally, air may
collect in the centrifugal pump 564 which, in turn, requires the
pump 564 to be primed (i.e., filled totally with water) prior to
operating. Leaving the second fluid flow path 570 open to air
enables the pump 564 to be primed with ease.
[0043] During operation, the hose end 530 is inserted in the
cleaning chamber 568. Subsequently, the suction at the hose end 530
provided by the suction source 529 draws cleaning fluid from the
supply tank 524 along the second fluid flow path 570. Cleaning
fluid can also be fed along the first fluid flow path 566 via the
centrifugal pump 564 toward the surface to be cleaned. Air that is
entrained during operation of the centrifugal pump 564 escapes to
atmospheric air through the second fluid flow path 570. In other
embodiments, suction of the suction source 529 may work in
combination with gravity feed to deliver the cleaning fluid to the
cleaning chamber 568.
[0044] FIG. 18 illustrates a portion of an extractor 620 having a
cleaning chamber 668 according to another embodiment. The extractor
620 is similar to the extractor 20 described above with reference
to FIGS. 1-12, and similar parts have been given the same reference
number plus 600. Only differences between the embodiments are
described.
[0045] As shown in FIG. 18, the accessory tool 634 operates as the
suction nozzle. As such, the cleaning chamber 668 receives the
accessory tool 634 in its entirety. In some embodiments, the
cleaning chamber 668 may receive only a portion of the accessory
tool 634 (e.g., the intake nozzle 644 and agitator 646), in which
case is more suitable if the agitator 646 is a rotary brush that
spins in response to a turbine that rotates as air is drawn passed
the turbine. Although the accessory tool 634 of the illustrated
embodiment is mounted vertically within the cleaning chamber 668,
the accessory tool 634 may be mounted horizontally within the
cleaning chamber 668 or in any other orientation. In any
orientation, the intake nozzle 644 can be positioned at a low point
within the cleaning chamber 668 so as to draw out all of the liquid
from the cleaning chamber 668. Optionally, at least one spray jet
669 is in communication with second fluid flow path 670 and
provided within the cleaning chamber 668 to direct the cleaning
fluid toward the accessory tool 634 to clean the accessory tool 634
and/or the agitator 646 of the accessory tool 634. The accessory
tool 634 is coupled to the hose end 630 and hose 632, which is
further in communication with the suction source 629 and the
recovery tank 626.
[0046] During operation, the accessory tool 634 is mounted within
the cleaning chamber 668. The cleaning fluid is expelled from the
at least one spray jet 669 toward the accessory tool 634 to clean
the accessory tool 634 of waste, and the cleaning fluid and waste
is temporarily collected within the cleaning chamber 668. Once the
cleaning fluid collected in the cleaning chamber 668 reaches a
predetermined height such as along an inclined floor of the chamber
668 (indicated by line 671), the cleaning fluid and waste are drawn
into the intake nozzle 644 of the accessory tool 634 (indicated by
arrows 673). Thus, the accessory tool 634, the intake nozzle 644,
and the hose 632 are cleaned simultaneously, while the cleaning
fluid and waste are discharged into the recovery tank 626.
[0047] FIG. 19 illustrates a portion of the extractor 720 having a
cleaning chamber 768 according to an alternative embodiment. The
extractor 720 is similar to the extractor 620 described above with
reference to FIG. 18, and similar parts have been given the same
reference number plus 100. Only differences between the embodiments
are described.
[0048] As shown in FIG. 19, the accessory tool 734 is a plurality
of accessory tools that are received within the cleaning chamber
768 to clean the accessory tools 734 of waste. In the illustrated
embodiment, the hose end 730 and hose 732 are coupled to the
cleaning chamber 768 via a drain reservoir 775, such that the hose
732 does not connect to either of the accessory tools 734. In an
alternative embodiment, the accessory tools 734 may be connected
together and to the hose 732 via a split or T-hose in a similar
construction to the embodiment of FIG. 18.
[0049] During operation, the fluid expelled from the at least spray
jet 769 toward the plurality of accessory tools 734 is collected in
the cleaning chamber 768. In this case, the cleaning fluid and
waste that is collected in the cleaning chamber 768 is drawn out of
the cleaning chamber 768 through the drain reservoir 775.
Subsequently, the cleaning fluid and waste flows through the hose
732 and expelled and stored in the recovery tank 726.
[0050] Thus, the invention provides, among other things, a
self-cleaning system for an extractor cleaning machine. Although
the invention has been described in detail with reference to
certain preferred embodiments, variations and modifications exist
within the scope and spirit of one or more independent aspects of
the invention as described.
* * * * *