NZ617284B2 - Rotary surface cleaning tool - Google Patents
Rotary surface cleaning tool Download PDFInfo
- Publication number
- NZ617284B2 NZ617284B2 NZ617284A NZ61728412A NZ617284B2 NZ 617284 B2 NZ617284 B2 NZ 617284B2 NZ 617284 A NZ617284 A NZ 617284A NZ 61728412 A NZ61728412 A NZ 61728412A NZ 617284 B2 NZ617284 B2 NZ 617284B2
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- New Zealand
- Prior art keywords
- rotary
- suction
- cleaning tool
- vacuum
- surface cleaning
- Prior art date
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Abstract
rotary surface cleaning machine is disclosed for cleaning floors, including both carpeted floors and uncarpeted hard floor surfaces including but not limited to wood, tile, linoleum and natural stone flooring. The rotary surface cleaning machine has a rotary surface cleaning tool mounted on a frame and coupled for high speed rotary motion relative to the frame. The rotary surface cleaning tool has a substantially circular operational surface that performs the cleaning operation. The rotary surface cleaning tool is driven by an on-board power plant to rotate at high speed. The rotary surface cleaning tool is coupled to a supply of pressurized hot liquid solution of cleaning fluid and a powerful vacuum suction source. The contact surface has spray nozzles alternating with suction shoes around an annular region with the suction shoes having suction relief grooves each extending in a perpendicular direction to the suction shoe direction. A first plurality of individual delivery spray nozzles includes larger orifices than a second plurality of individual delivery spray nozzles. e and coupled for high speed rotary motion relative to the frame. The rotary surface cleaning tool has a substantially circular operational surface that performs the cleaning operation. The rotary surface cleaning tool is driven by an on-board power plant to rotate at high speed. The rotary surface cleaning tool is coupled to a supply of pressurized hot liquid solution of cleaning fluid and a powerful vacuum suction source. The contact surface has spray nozzles alternating with suction shoes around an annular region with the suction shoes having suction relief grooves each extending in a perpendicular direction to the suction shoe direction. A first plurality of individual delivery spray nozzles includes larger orifices than a second plurality of individual delivery spray nozzles.
Description
ROTARY SURFACE CLEANING TOOL
CROSS NCE
This application is a divisional ofNew Zealand Patent Application No.
599883, filed 9 May 2012, which claims priority from United States Patent Application
No. 13/364,522, filed 2 ry 2012, the entire contents of these Applications being
incorporated herein by reference thereto.
FIELD OF THE INVENTION
The present invention relates generally to a rotary tool for cleaning surfaces,
including rugs and carpets, and in particular to such apparatus and methods with brushes
for coaction with cleaning liquid delivering means and n extraction means.
BACKGROUND OF THE INVENTION
Many apparatuses and methods are known for cleaning carpeting and other
flooring, wall and upholstery surfaces. The cleaning apparatuses and methods most
commonly used today apply cleaning fluid as a spray under pressure to the surface
whereupon the cleaning fluid dissolves the dirt and stains and the apparatus scrubs the
fibers while simultaneously applying suction to extract the cleaning fluid and the dissolved
soil. Many ent apparatuses and methods for spraying cleaning fluid under pressure
and then removing it with n are illustrated in the prior art. Some of these ng,
tuses and methods use a rotating device wherein the entire machine is transported
over the carpeting while a cleaning head is rotated about a vertical axis.
Another category of carpeting and upholstery cleaning tuses and
s using the rotating device wherein the entire machine is transported over the
carpeting while a cleaning head is rotated about a vertical axis includes es having a
plurality of arms, each of having one or more spray nozzles or a suction means coupled to
a vacuum source. These rotary cleaning tools providing a more intense scrubbing action
since, in general, more scrubbing surfaces contact the carpet. These apparatuses and
31/10/13,op2358 speci,l
methods are ily illustrated in US. Pat. No. 4,441,229 granted to Monson on April
, 1984, and are listed in the prior art known to the inventor but not discussed in detail
herein.
A third category of carpeting and upholstery cleaning apparatuses and
methods that attempt to deflect or otherwise control the cleaning fluid are rated by
US. Pat. No. 6,243,914, which was granted to the inventor of the present patent
ation June 12, 2001 , and which is incorporated herein by reference. US. Pat. No.
914 discloses a cleaning head for carpets, walls or tery, having a rigid open-
bottomed main body that defines a surface subjected to the cleaning process. Mounted
within or adjacent to the main body and coplanar with the bottom thereof is a fluid-
applying device which includes a slot at an acute angle to the plane of the bottom of the
body located adjacent the plane of the bottom of the body, the slot configured such that the
fluid is applied in a thin sheet that flows out of the slot and into the upper portion of the
e to be cleaned and is subsequently extracted by suction into the vacuum source for
recovery. The cleaning head is alternatively multiply embodied in a plurality of arms
which are rotated about a hub.
illustrates a typical prior art professional fluid cleaning system as
illustrated in US. Pat. 6,243,914. It is to be understood that this cleaning system is
typically mounted in a van or truck for mobile servicing of carpets and g in homes
and businesses. The l truck-mounted fluid cleaning system 1 includes a main liquid
waste receptacle 3 into which soiled cleaning fluid is routed. A cleaning head or nozzle 5 is
mounted on a rigid vacuum wand 7 which includes a handle 8 for lling cleaning
head 5. A supply of pressurized hot liquid solution of cleaning fluid is supplied to cleaning
head 5 via a cleaning solution ry tube 9 arranged in fluid communication with a
cleaning solution inlet orifice 11 of cleaning head 5 for delivering there through a flow of
pressurized liquid cleaning solution to fluid cleaning solution spray jets 13 of cleaning
head 5. Carpet cleaning head 5 typically includes a rectangular, rdly open
truncated pyramidal envelope 15 which contains the cleaning fluid spray that is applied to
the carpet or other flooring, as well as forming a vacuum plenum for the vacuum retrieving
the soiled liquid for transport to waste receptacle 3. An intake port 16 of the vacuum wand
7 is coupled in fluid ication with the vacuum plenum of cleaning head 5.
31/10/13,op2358 speci,2
Mounted above the main waste receptacle 3 is a cabinet 17 housing a
vacuum source and supply of pressurized hot liquid cleaning fluid. Soiled cleaning fluid is
routed from cleaning head 5 into waste receptacle 3 via rigid vacuum wand 7 and a flexible
vacuum return hose 19 coupled in fluid communication with an exhaust port 20 thereof,
whereby spent cleaning solution and dissolved soil are withdrawn under a vacuum force
supplied by the fluid cleaning system, as is well known in the art. A vacuum control valve
or switch 21 is provided for controlling the vacuum source.
illustrates details of operation of the typical truck-mounted fluid
cleaning system 1 illustrated in Here, the main waste receptacle 3, as well as the
vacuum source and ng fluid supply cabinet 17, are shown in partial cut-away views
for exposing s thereof. The cleaning fluid is drawn through cleaning solution delivery
tube 9 from a supply 23 of liquid cleaning solution in the cabinet 17. The vacuum for
vacuum return hose 19 is ed by a vacuum suction source 25, such as a high pressure
blower, driven by a power supply 27. The blower vacuum source 25 communicates with
the main waste receptacle 3 through an air intake 29 coupled into an upper portion 31
f and, when ing, develops a ul vacuum in an air chamber 33 enclosed in
the receptacle 3.
Vacuum return hose 19 is coupled in communication with waste receptacle
3 through a drain 35, for example, at upper portion 31, remote from intake 29. Vacuum
return hose 19 feeds soiled cleaning fluid into waste receptacle 3 as a flow 37 of liquid
soiled with dissolved dust, dirt and stains, as well as undissolved particulate material
picked up by the vacuum return but of a size or nature as to be undissolvable in the liquid
ng fluid. The flow 37 of soiled cleaning fluid enters into waste receptacle 3 through
drain 35 and forms a pool 39 of soiled liquid filled with dissolved and olved debris.
A float switch 41 or other means avoids overfilling the waste receptacle 3 and inundating
the blower 25 through its air intake 29. A screen or simple filter may be applied to remove
gross contaminates from the soiled liquid flow 37 before it reaches the pool 39, but this is a
matter of operator choice since any impediment to the flow 37 reduces crucial vacuum
pressure at the ng head 5 for retrieving the soiled liquid from the cleaned carpet or
other surface.
31/10/13,op2358 speci,3
Soiled liquid cleaning fluid effectively filters air drawn into the waste
receptacle 3 by dissolving the majority of dust, dirt and stains, and drowning and sinking
any undissolved debris whereby it is sunk into the pool 39 of soiled liquid and captured
therein. Thus, the soiled liquid in the vacuum return hose 19 effectively filters the air
before it is discharged into the enclosed air chamber 34, and no airborne les of dust
and dirt are available to escape into the enclosed air chamber 33 floating above the liquid
pool 39.
In a rotary surface cleaning tool, cleaning head 5 utilizes cleaning liquid
ring means and suction extraction means in ation with a rotary cleaning plate
that is coupled for high speed rotary motion.
One example of a rotary surface cleaning tool is illustrated by US. Pat. No.
4,182,001, E CLEANING AND RINSING DEVICE, issued to Helmuth W.
Krause on January 8, 1980, which is incorporated herein by reference.
illustrates the rotary surface cleaning and rinsing machine of Krause,
indicated generally at 50, which includes a substantially circular housing 51 and frame 53
with its lower axial face open at 55, with this face 55 being disposed substantially parallel
to the surface which is to be cleaned, such as a rug 57. Mounted on top of the g 51
and frame 53 is an enclosure 59 from which extends a handle assembly 61. Handle
assembly 61 is held by the operator during the manipulation ofmachine 50. Handle
assembly 61 has operating levers 63 and 65. Control handle 65 regulates flow of cleaning
or rinsing fluid to rotary surface cleaning tool 51 through feed line 67. For example, feed
line 67 is coupled to cleaning solution delivery tube 9 from supply 23 of liquid cleaning
on in cabinet 17 in a truck-mounted unit, or another supply of liquid cleaning
solution. l handle 63 can be used to regulate the ng and stopping of drive
motors.
An exhaust pipe or tube 69 is mounted on handle ly 61 and is
connected to the top of rotary surface cleaning tool 51 at a connection 71. Suction is
created by the motor and fan assembly 73. Else, t pipe or tube 69 is coupled for
suction extraction to vacuum return hose 19 and vacuum source 25 in a truck-mounted
3l/IO/l3,op2358 speci,4
unit. Soiled cleaning fluid extracted by suction extraction from carpet or rug 57 is drawn
off through outlet connection 71 and through discharge hose 69. Frame 53 may also be
supported by a swivel wheel 75. A large rotor 77 is rotationally mounted within housing 51
and rotationally coupled within enclosure 59. Rotor 77 is drivingly connected by a drive
belt or chain 79 to an output shaft 81 of an electric motor 83 mounted on the frame 53.
Motor 83 serves to turn large rotor 77. A plurality of circular brushes 85 are located on
rotor 77.
illustrates brushes 85 are d as shown by arrows 87 in the
te direction from the turning motion 89 of the rotor 77 by a rotating drive means for
contrarotating brushes 85 with respect to rotor 77. Moreover, brushes 85 are d at
significantly higher revolutions per minute (RPM) than rotor 77 for ing a very
vigorous brush scrubbing action. For example, brushes 85 rotate more than seven times
with t to rug 57 for each full rotation of rotor 77. As a result, the brush elements or
bristles in the eral region traveling very rapidly in a backward direction 87 relative to
rotor 77 tend to lift up and to flip over the matted pile of rug 57 y exposing and
scrubbing its underside. Then, in interior regions 91 where brush elements or bristles are
traveling in the same direction as rotor 77, they flip the pile back into its original position
for scrubbing it on the other side. Thus, the pile of rug 57 becomes thoroughly scrubbed on
its underside as well as on its upper side. A cyclic scrubbing action is produced flipping the
matted pile back and forth many times during one pass of machine 50.
Also positioned on rotor 77 are suction extraction nozzles 93 spaced
between brushes 85 and icating with discharge hose 69. Suction extraction nozzles
93 are fixed to rotor 77 and each is provided with a relatively narrow vacuum extraction
slot 95. Each vacuum extraction slot 95 is positioned coplanar with the ends of the brush
elements or bristles ofbrushes 85 distal from rotor 77.
Also d on rotor 77 is a plurality of spray nozzle means 97 for
sing cleaning or rinsing liquid. Each of spray nozzle means 97 can be mounted for
angular adjustment so as to direct sprays of cleaning or rinsing liquid through individual
nozzles 99 onto rug 57 at different . The cleaning or rinsing fluid is conveyed to
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nozzle means 97 through line 67 which leads to a supply of cleaning or rinsing fluid, such
as either feed line 67 or solution delivery tube 9.
During operation of the cleaning device, rotor 77 rotates in the direction
indicated by arrow 89. As the cleaning liquid is sprayed onto rug 57 through nozzles 99,
rotating brushes 85 agitate the pile of rug 57 in conjunction with the cleaning liquid to
loosen dirt in or on the surface. The spent cleaning liquid and loosened dirt are extracted
up by the next succeeding suction extraction nozzle 93. Accordingly, the -dwell-time
is solely controlled by machine 50, and not by the rate at which the operator advances
machine 50 over the floor.
However, known rotary surface cleaning tool are limited in their ability to
ively provide the desired cleaning of target floor surfaces and extraction of soiled
cleaning liquid.
SUMMARY OF THE INVENTION
The present invention is a rotary surface cleaning machine for cleaning
floors, including both carpeted floors and uncarpeted hard floor surfaces including but not
limited to wood, tile, linoleum and natural stone flooring. The rotary e cleaning
e has a rotary surface cleaning tool mounted on a frame and coupled for high speed
rotary motion ve to the frame. The rotary surface cleaning tool has a substantially
circular operational surface that performs the cleaning operation. The rotary surface
ng tool is driven by an on-board power plant to rotate at a high rate. The rotary
surface ng tool is d to a supply of pressurized hot liquid solution of cleaning
fluid and a powerful vacuum suction source.
ing to one aspect of the present invention there is provided a rotary
surface cleaning machine, comprising: a rotary surface ng tool coupled for high
speed rotary motion relative to a frame member and r comprising a substantially
circular operational e; a high speed rotary driving means coupled for driving a high
speed rotary motion of the rotary surface cleaning tool; a plurality of substantially radially
oriented individual arrays of cleaning solution delivery spray nozzles being substantially
31/10/13,0p2358 speci,6
uniformly rly distributed across the operational e of the rotary surface
cleaning tool, the arrays of spray nozzles being coupled in fluid communication with a
pressurized flow of cleaning fluid through a plurality of individual liquid cleaning fluid
distribution channels of a cleaning fluid distribution manifold portion of the rotary surface
cleaning tool; a plurality of suction extraction shoes being substantially uniformly
angularly distributed across the operational surface of the rotary surface cleaning tool
ately between the arrays of cleaning solution delivery spray nozzles and being
projected from the operational surface of the rotary surface cleaning tool by a biasing
member individually biasing each n extraction shoe outwardly relative to bottom
operational surface of the rotary e cleaning tool, and each of the suction extraction
shoes further comprising a fluid extraction passage presented adjacent to the operational
surface of the rotary surface cleaning tool and oriented substantially radially of the
operational surface of the rotary surface cleaning tool, each of the fluid extraction es
communicating through one of a plurality ofbranch passages of a vacuum ld with a
vacuum plenum that is in fluid communication with a vacuum suction source, and wherein
an operational surface of each suction extraction shoe further comprises a plurality of
n relief grooves formed thereacross and oriented substantially crosswise of the fluid
extraction passage thereof.
Other aspects of the invention are detailed herein.
BRIEF DESCRIPTION OF THE DRAWINGS
The foregoing aspects and many of the ant advantages of this
invention will become more readily appreciated as the same s better understood by
reference to the following detailed description, when taken in conjunction with the
anying drawings, wherein:
illustrates a typical prior art professional fluid cleaning system of a
type that is typically mounted in a van or truck for mobile servicing of carpets and flooring
in homes and sses;
31/10/13,op2358 speci,7
illustrates details of operation of the typical truck-mounted fluid
cleaning system illustrated in
illustrates one rotary surface cleaning and rinsing machine of the
prior art;
is another View of the rotary surface cleaning and rinsing machine of
the prior art as illustrated in
rates the rotary surface cleaning machine of the invention for
ry of liquid cleaning fluid to a target surface to be cleaned, such as either carpeting
or hard floor surfaces including but not limited to wood, tile, linoleum and natural stone
is a side View of the rotary surface cleaning machine illustrated in
wherein a plurality of suction extraction shoes are more clearly illustrated as being
located on a rotary surface cleaning tool and ted from an open lower axial face of a
housing dome;
is a bottom view of the rotary surface cleaning machine illustrated in
and wherein the plurality of suction extraction shoes are more clearly
illustrated as being located on the rotary surface cleaning tool in the open lower axial face
of the housing dome;
is another bottom View of the rotary surface cleaning e
rated in and wherein a vely narrow annular suction or vacuum
extraction passage is formed as a substantially continuous annular slot between the bottom
cleaning surface of the rotary surface cleaning tool and the housing dome at its lower axial
face for closer approach to walls and other surfaces projected from the floor;
rates the rotary e ng tool of the rotary surface
cleaning machine illustrated in FIGS. 5 through wherein the rotary surface cleaning
tool is mounted on the support frame with an on-board power plant;
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is a partial section view of the rotary surface cleaning machine
illustrated in through wherein the rotary surface cleaning tool is d on
the support frame through a rotary coupling;
illustrates a relatively narrow annular suction or vacuum extraction
passage formed as a substantially continuous annular slot between the bottom cleaning
surface of the rotary surface cleaning tool and the housing dome, and further illustrates an
alternative vacuum plenum that is useful for cleaning trapped debris from the vacuum
passage;
is an exploded view showing operation of the alternative vacuum
plenum of ;
is another exploded View showing operation of the ative
vacuum plenum of and ;
illustrates the rotary surface cleaning tool of the rotary surface
cleaning machine illustrated in through wherein the rotary surface cleaning
tool is gly connected, for example but without limitation, by a drive gear to the rotary
drive output of the on-board power plant;
[003 8] A rates an upper ng surface of the rotary surface cleaning
tool of the rotary surface cleaning machine of the prior art;
B illustrates an upper coupling surface of the rotary surface cleaning
tool of the rotary surface cleaning e rated in h as further
illustrated in , and further illustrates the vacuum manifold having an optional
curved portion that actually generates a pumping action of the suction pressure;
illustrates a bottom operational surface of the rotary surface
cleaning tool of the rotary e cleaning machine illustrated in through as
further illustrated in and ;
31/10/13,op2358 speci,9
is a detail View of one embodiment of the suction extraction shoe of
the rotary surface ng e illustrated in through
is a detailed cross-section view of one embodiment of the suction
extraction shoe illustrated in , wherein the suction extraction shoe is shown as
having a leading e and a trailing surface as a function of the rotational direction of
the rotary surface cleaning tool;
illustrates the bottom ional surface of the rotary e
cleaning tool of the rotary surface ng machine illustrated in through
having the suction extraction shoe with an optional raised leading surface portion and a
relatively lower trailing surface portion as illustrated in and ;
illustrates bottom the operational surface of the rotary surface
cleaning tool of the rotary surface cleaning machine illustrated in through
having a spiral pattern of cleaning on delivery spray nozzle arrays of individual
delivery holes, wherein each spray nozzle array consists of one to about four individual
delivery holes, and wherein the individual spray nozzle arrays are positioned in a spiral
pattern across the bottom operational surface of the rotary surface ng tool;
A illustrates an alternative configuration of the spiral pattern of
cleaning solution delivery spray nozzle arrays illustrated in ;
is a detail View of another embodiment of the suction extraction
shoe of the rotary surface cleaning machine illustrated in through wherein
the leading surface does not include the optional raised portion but is rather substantially
ar with the trailing surface, but the leading surface rather includes one or more
bristle brushes in one or more rows arranged along an outermost n thereof;
is a detailed cross-section View of the ment of the suction
extraction shoe illustrated in ;
illustrates the operational surface of the rotary e cleaning tool
of the rotary surface cleaning machine illustrated in through wherein the
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suction extraction shoes are red with substantially coplanar leading and trailing
surfaces, and the shoe leading surfaces have one or more of the bristle brushes in one or
more rows arranged along the outermost portions thereof;
illustrates rotary surface cleaning tool of the rotary surface cleaning
machine illustrated in through wherein each suction extraction shoe is
supported in the bottom ional surface by a biasing means structured for individually
g or “floating” each suction extraction shoe outwardly relative to the bottom
operational surface of the rotary surface cleaning tool;
is a cross-section View of the rotary surface cleaning tool of the
rotary surface cleaning machine illustrated in through wherein the biasing
means for individually biasing or “floating” each suction extraction shoe outwardly
relative to the bottom operational surface of the rotary surface cleaning tool is ured,
by example and without limitation, as a ent cushion, such as a closed-cell foam rubber
cushion of about one-quarter inch thickness or thereabout, that is positioned between a
flange portion of each shoe and the rotary surface cleaning tool;
is a detail view of another embodiment‘of the n extraction
shoe of the rotary surface cleaning e illustrated in through wherein
each suction extraction shoe is structured for lishing the “washboar ” scrubbing
effect of the le target surface, i.e. carpet surface, independently of the next
consecutive suction extraction shoe;
is a ed cross-section view of the embodiment of the suction
extraction shoe illustrated in , n the suction extraction shoe is shown as
having the optional relatively lower or recessed portion formed on the leading surface and
the relatively raised portion is formed on the trailing surface as a on of the reversed
clockwise rotational direction of the rotary surface cleaning tool; and
illustrates the bottom ional surface of the rotary surface
cleaning tool of the rotary surface cleaning machine illustrated in h
having the suction extraction shoe formed with the optional relatively lower or recessed
31/10/13,op2358 speci,“
e portion on its leading surface, and the optional relatively raised surface portion
formed on the trailing surface as illustrated in and .
DETAILED DESCRIPTION OF PREFERRED MENT
In the Figures, like numerals indicate like elements.
illustrates a rotary surface cleaning machine 100 of a type for
delivery of liquid cleaning fluid to a target surface to be d, such as either carpeting
or hard floor surfaces including but not limited to wood, tile, linoleum and natural stone
flooring. Rotary surface cleaning e 100 is coupled to draw liquid cleaning fluid
through cleaning solution ry tube 9 from a supply 23 of liquid cleaning solution in
the cabinet 17.
Rotary surface cleaning machine 100 is optionally a stand-alone unit
coupled to a supply of pressurized hot liquid solution of cleaning fluid and a having an
on—board motor or other power plant d for driving a fan assembly for generating a
suction as, for example, rotary tool for cleaning surfaces disclosed by US. Pat. No.
4,182,001, which is incorporated herein by reference. Alternatively, rotary surface cleaning
machine 100 is part of a truck-mounted fluid cleaning system such as illustrated in
and and disclosed in US. Pat. 6,243,914, which is incorporated herein by reference.
When part of a truck-mounted fluid cleaning system, rotary e cleaning machine 100
is coupled to vacuum return hose 19 and truck-mounted vacuum source 25 by means of an
exhaust pipe or hose 102 coupled to an exhaust port 104. Fluid tion suction is
generated by the vacuum force supplied by vacuum source 25. Soiled cleaning fluid
ted from carpet or rug 57 is drawn off through exhaust port 104 and carried through
flexible vacuum return hose 19 to main waste receptacle 3.
As illustrated here by example and t limitation, rotary e
cleaning machine 100 includes a support frame member 106, which may be supported by a
wheel assembly 108. Support frame 106 carries a substantially circular housing dome 110
having its lower axial face open at 112 with this face 112 being disposed substantially
parallel to the surface which is to be d, such as rug 57. A pivotally mounted handle
31/10/13,op2358 speci,12
ly 114 is used by the operator during operation for manipulating machine 100.
Handle assembly 114 supports one or more operating control mechanisms mounted
thereon for the convenience of the operator. For example, one flow control mechanism 116
regulates flow of cleaning fluid h cleaning solution delivery tube 9. A conventional
quick connection can be used for supplying the liquid cleaning solution. Another vacuum
control mechanism 118 can be used to regulate the suction extraction of spent ng
liquid and loosened dirt. A rotary control mechanism 120 can be used to regulate the
starting and stopping of the rotary surface cleaning tool through l of an on-board
power plant 122, such as an ic motor or other power plant, mounted on support frame
106.
A rotary e cleaning tool 124 is configured as a large rotor that is
joumaled with support frame 106 for high speed rotary motion within housing dome 110.
On-board power plant 122 is coupled for g the high speed rotary motion of rotary
surface cleaning tool 124.
A ity of suction extraction shoes 126 are located on rotary e
cleaning tool 124 and project from open lower axial face 112 of housing dome 110. Each
suction extraction shoe 126 is coupled in fluid communication with vacuum source 25
through exhaust port 104 and exhaust pipe or hose 102 for the suction extraction of spent
cleaning liquid and loosened dirt.
is a side View of the rotary surface cleaning machine 100 illustrated
in wherein the plurality of suction extraction shoes 126 are more clearly rated
as being located on rotary surface cleaning tool 124 and projected from open lower axial
face 112 ofhousing dome 1 10.
is a bottom view of the rotary surface cleaning machine 100
illustrated in and wherein the plurality of n extraction shoes 126 are
more clearly illustrated as being located on rotary surface cleaning tool 124 in open lower
axial face 112 ofhousing dome 110.
31/10/13,op2358 speci,l3
As sed herein, a rotary drive output 128 of on-board power plant 122
is coupled for driving the high speed rotary motion of rotary surface cleaning tool 124. For
example, rotary surface cleaning tool 124 is rotationally mounted within housing dome 110
and is drivingly connected, for example but without limitation by any of: a drive belt, a
drive chain, or a drive gear, to rotary drive output 128 of on-board power plant 122
mounted on frame 106. Here, by example and without limitation, rotary drive output 128
of on-board power plant 122 is a drive gear coupled to drive a circumferential tooth gear
130 disposed about the circumference of rotary surface cleaning tool 124. Accordingly,
drive means alternative to the rotary gear drive disclosed herein by example and without
limitation are also plated and may be substituted without deviating from the scope
and intent of the present invention. Power plant 122 thus serves to turn rotary surface
cleaning tool 124 at a high speed rotary motion under the control of rotary control
mechanism 120.
Rotary surface cleaning tool 124 includes a plurality of arrays 132 of
cleaning solution ry spray nozzles each coupled in fluid connection to the
rized flow of cleaning fluid delivered through ng solution delivery tube 9.
Spray nozzle arrays 132 deliver pressurized hot liquid solution of cleaning fluid to target
carpeting or hard floor surface. Spray nozzle arrays 132 are distributed on rotary surface
cleaning tool 124 in groups oned between the ity of suction extraction shoes
126. Accordingly, when rotary surface cleaning tool 124 turns at 150 RPM during
operation, each spray nozzle array 132 delivers the pressurized hot liquid solution of
cleaning fluid to the target floor surface at least one, two or more times each second.
Consecutively with arrays 132 of spray s, each of the ity of suction extraction
shoes 126 also covers the same area of the target floor as spray nozzle arrays 132 at least
one, two or more times each second. Furthermore, each of the plurality of n
extraction shoes 126 includes a relatively narrow n or vacuum extraction passage 136
oriented substantially radially of rotary surface cleaning tool 124.
rates a relatively narrow annular auxiliary suction or vacuum
extraction passage 136a formed as a substantially continuous annular slot between bottom
cleaning surface of rotary surface cleaning tool 124 and housing dome 110 at lower axial
face 112 thereof. Auxiliary annular suction or vacuum extraction passage 136a is coupled
31/10/13,op2358 speci,l4
in fluid ication with vacuum source 25 h exhaust port 104 and exhaust pipe
or hose 102 for the suction extraction of spent cleaning liquid and loosened dirt. Auxiliary
annular suction or vacuum_extraction passage 136a is positioned adjacent to an outermost
surface ofhousing dome 110, which permits minimum approach distance to walls and
other surfaces ted from the floor or rug 57. Accordingly, housing dome 110 of the
invention having auxiliary annular vacuum extraction passage 136a in combination with
the plurality of n or vacuum extraction passages 136 oriented substantially radially of
rotary surface cleaning tool 124 is a significant novel improvement over conventional
vacuum extraction structures of the prior art as to be an independently patentable feature,
as discussed in more detail herein below. rmore, auxiliary vacuum extraction slot
136a need not completely surround rotary surface cleaning tool 124 to be effective. For
example, auxiliary vacuum extraction slot 136a need not extend into area adjacent to
support frame member 106 under mounted handle assembly 114.
illustrates the rotary surface cleaning tool 124 of the rotary surface
cleaning machine 100 illustrated in FIGS. 5, 6 and 7, wherein rotary e cleaning tool
124 is mounted on support frame 106 with on—board power plant 122. Here, by example
and without tion, rotary drive output 128 of on-board power plant 122 is a drive gear
coupled to drive circumferential tooth gear 130 disposed about the circumference of rotary
surface cleaning tool 124. However, as disclosed , drive means alternative to the
rotary gear drive are also contemplated and may be substituted without ing from the
scope and intent of the present invention.
is a partial cross-section View of the rotary surface cleaning machine
100 illustrated in through wherein rotary surface cleaning tool 124 is
mounted on support frame 106 through a rotary coupling. For example, rotary surface
cleaning tool 124 is mounted through a cylindrical sleeve ion 138 of a rotor hub
member 140 that is joumaled in a bushing 142.
Each of the ity of spray nozzle arrays 132 is coupled in fluid
communication with the pressurized hot liquid solution of cleaning fluid through a
cleaning fluid distribution manifold 144 that is in fluid communication with cleaning
solution delivery tube 9. Cleaning fluid distribution manifold 144 includes a central sprue
13,op2358 speci,15
hole 146 for receiving the pressurized cleaning fluid and an expansion chamber 148 for
reducing the pressure of the cleaning fluid to below a delivery pressure provided by the
supply surized cleaning solution, such as but not limited to supply 23 of pressurized
cleaning solution in the cabinet 17 of a truck-mounted system, or another supply of
pressurized cleaning solution. ion chamber 148 is connected for distributing the
liquid cleaning fluid outward along a plurality of radial liquid cleaning fluid distribution
channels 150 for delivery by the plurality of spray nozzle arrays 132 uniformly distributed
across bottom cleaning surface 72 of rotary surface cleaning tool 124. Individual radial
cleaning fluid distribution channels 150 are mly angularly distributed within rotary
surface cleaning tool 124, wherein each of cleaning fluid distribution channels 150
communicates with one ofthe plurality of spray nozzle arrays 132 for delivery thereto of
the pressurized hot liquid on of ng fluid. Radial liquid cleaning fluid
distribution channels 150 are optionally extended to an outer circumference 124a of the
large rotor of surface cleaning tool 124 for ease ofmanufacturing, and later sealed with
plugs 151.
Between adjacent arrays 132 of spray nozzles are distributed
radially-oriented suction or vacuum extraction passage 136 each coupled to a vacuum
source for retrieving a quantity of soiled cleaning fluid. Radially-oriented plurality of
suction extraction shoes 126 are uniformly distributed angularly about rotary surface
ng tool 124 for uniformly angularly buting the suction or vacuum tion
passages 136 about rotary surface cleaning tool 124. Exhaust port 104 icates with
a vacuum plenum 152 within rotor hub member 140, which in turn icates through
respective n extraction shoes 126 with each suction or vacuum extraction passage
136. For example, radially-oriented suction or vacuum extraction passages 136
communicate through individual vacuum manifold branch passages 154 of a vacuum
manifold 155 that each icate in turn with a substantially cylindrical central
vacuum passage 156 within rotor hub member 140. Central vacuum passage 156
communicates at its upper end through vacuum plenum 152 and exhaust port 104 with
exhaust pipe or hose 102.
As indicated by rotational arrow 158, rotary e cleaning tool 124 is
d at high speed during application of cleaning solution to the target surface. Rotary
31/10/13,op2358 speci,l6
surface ng tool 124 successfully delivers a generally uniform distribution of liquid
cleaning solution to a target surface, such as rug 57, between the quantity of arrays 132 of
spray nozzles and the large number of passes, i.e. at least one, two or more passes per
second, of each spray nozzle array 132 occasioned by the high rotational speed rotary
surface cleaning tool 124 regardless of any lack of mity in the instantaneous fluid
delivery of any individual spray nozzle array 132. Additionally, the taneous fluid
delivery of each individual spray nozzles array 132 tends to be generally uniform at least
because the length of the spray nozzle array 132 is minimal as ed with the size of
rotary e cleaning tool 124.
illustrates auxiliary annular suction or vacuum extraction passage
136a formed as a substantially annular slot between outer circumference 124a of surface
cleaning tool 124 and circumferential skirt 111 ofhousing dome 110 adjacent to its lower
axial face 112. Annular vacuum extraction passage 136a communicates with central
vacuum passage 156 within rotor hub member 140. By example and without limitation,
annular vacuum extraction e 136a communicates with central vacuum passage 156
through extensions 157 formed in one or more individual vacuum manifold branch
es 154 and through outer circumference 124a of surface cleaning tool 124. As
discussed herein, dual vacuum manifold branch passages 154 each communicate in
turn with central vacuum passage 156 within rotor hub member 140, whereby annular
vacuum extraction passage 136a communicates with central vacuum passage 156 and
exhaust port 104.
atively, annular vacuum extraction passage 136a communicates with
a vacuum passage 136b formed between g dome 110 and vacuum manifold cover
159 which is fixed to top of surface cleaning tool 124 and seals individual vacuum
manifold branch passages 154. Vacuum passage 136b communicates with central vacuum
passage 156 within rotor hub member 140 either indirectly through one or more vacuum
manifold apertures 161 formed through_vacuum manifold cover 159 in ication
with individual vacuum ld branch passages 154, else directly through one or more
vacuum passage apertures 163 formed in direct communication with central vacuum
passage 156 directly through cylindrical sleeve extension 138 of rotor hub member 140.
According to yet another alternative, vacuum passage 136b communicates directly to a
31/10/13,op2358 speci,l7
second independent exhaust port 104a that is coupled h a portion 1 13 of housing
dome 110, exhaust port 104a is in turn coupled to truck-mounted vacuum source 25 by
means of either exhaust hose 102 or another exhaust hose, whereby vacuum pressure is not
d in vacuum manifold branch passages 154 and vacuum extraction passages 136
communicating ith. Other means for coupling annular vacuum extraction passage
136a in communication with central vacuum passage 156 or ly with either t
hose 102 or another exhaust hose are also contemplated and may be included and or
substituted without ing from the scope and intent of the present invention.
According to one embodiment, at least circumferential skirt 111 ofhousing
dome 110 forming r vacuum extraction passage 136a is formed of a resiliently
pliable material, such as a plastic or rubber material. The material is pliable enough to
collapse skirt 111 of housing dome 110 when cleaning machine 100 is forced into contact
with an immovable object, such as a wall. Yet the material is resilient enough to
ntially automatically reform collapsed skirt 111 and annular vacuum extraction
passage 136a when cleaning machine 100 is moved away from contact such immovable
object. Accordingly, cleaning machine 100 can be moved closely enough to such
immovable objects that spray nozzle arrays 132 and suction extraction shoes 126 of
cleaning tool 124 can be positioned almost directly t a wall for cleaning solution
ry and retrieval. This flexibility of circumferential skirt 111 of g dome 110 is
thus advantageous, for example, for ng wall-to-wall carpet.
also illustrates an alternative vacuum plenum 152a communicating
with l vacuum passage 156, for example at an upper portion thereof. Alternative
vacuum plenum 152a is useful for emptying and cleaning central vacuum passage 156
during operation of rotary surface cleaning machine 100. Alternative vacuum plenum 152a
optionally includes means 218 for ly inspecting central vacuum passage 156. For
example, visual inspecting means 218 is formed as a visually clear sight window set into a
side wall 220 of alternative vacuum plenum 152a. Else, in another e, visual
inspecting means 218 is provided as all, or at least a portion of side wall 220 of alternative
vacuum plenum 152a being formed substantially entirely of a visually clear material, such
as glass or a visually clear polyvinyl chloride (PVC) or polycarbonate material, whereby
central vacuum passage 156 is clearly visible through some or substantially all of vacuum
31/10/13,op2358 speci,18
plenum side wall 220. Visual inspecting means 218 is a unique attribute of alternative
vacuum plenum 152a. In inventor’s long years and vast experience, prior art vacuum
plenums have all been opaque whereby operator must determine levels of undissolved
dust, dirt and debris entrapped in the vacuum plenum either by physically disassembling
the vacuum plenum for visual inspection, else by noticing a reduction in the suction level
at the suction extraction ports. Either prior art means for determining a build-up of
entrapped contaminants at least reduces efficiency of the cleaning tool, and may be
detrimental to the cleaning tool, and potentially to the entire ng system. Therefore,
vacuum _visual inspecting means 218 of the present invention advantageously
provides both increased cleaning efficiency of rotary surface cleaning machine 100, and
means for protecting rotary surface cleaning machine 100 from damage, as from clogging
or even possible over heating.
Another advantageous unique attribute of alternative vacuum plenum 152a
is a removable vacuum inlet cap assembly 230 which es as a clean-out for
ageously emptying and cleaning central vacuum passage 156 during operation of
rotary surface cleaning machine 100, whereby rotary surface ng machine 100 is
provided with increased cleaning efficiency and tion from damage, as from clogging
or even possible over heating. For example, removable vacuum inlet cap assembly 230
includes a removable machined or molded inlet cap 232 that fits over a substantially round
open end 152b of tubular alternative vacuum plenum 152a. Inlet cap 232 is formed with a
stem or plug 234 that is sized to enter into and mate with open end 152b of tubular
alternative vacuum plenum 152a. Inlet cap 232 is structured to seal open end 152b of
vacuum plenum 152a. For example, cap plug 234 is formed with one or more seal seats
236 each sized to receive a seal 238 which is compressed between cap plug 234 and open
end 152b ofvacuum plenum 152a. For example, seal seats 236 each accept thereinto an
elastomeric o-ring seal 238 sized to be compressed between cap plug 234 and open end
152b ofvacuum plenum 152a. Alternatively, inlet cap 232 is sized to fit e diameter
of side wall 220 of vacuum plenum 152a similarly to a lid fitting a jar, wherein one or
more seal seats 236 are formed into inner e of lid side wall similarly to lid screw
threads, and o-ring seals 238 are fit into seal seats 236 and compressed n lid inner
side wall and outer surface of side wall 220 of vacuum plenum 152a. ing to another
ative, whether inlet cap 232 has cap plug 234 sized to fit into open end 152b of
31/10/13,op2358 speci,l9
tubular alternative vacuum plenum 152a, or has external wall sized to fit outside diameter
of side wall 220, underside of inlet cap 232 is alternatively formed with one or more seal
seats 236 and one or more seals 238 are positioned between underside of inlet cap 232 and
top surface of vacuum plenum side wall 220 at open end 152b of tubular alternative
vacuum plenum 152a, which seals 238 are compressed between inlet cap 232 and vacuum
plenum side wall 220 as by negative re of vacuum in central vacuum e 156
during operation of rotary surface cleaning machine 100. Inlet cap 232 is thus retained in
connection with ative vacuum plenum 152a by application of negative pressure of
vacuum in central vacuum passage 156 during operation of rotary surface cleaning
machine 100, and seal 238 maintains the negative vacuum pressure in vacuum e
156, whereby no mechanical connection is required. Furthermore, e no mechanical
connection, i.e., clamp or threads, is necessary between inlet cap 232 and alternative
vacuum plenum 152a, inlet cap 232 is readily removable from ative vacuum plenum
152a as soon as negative vacuum pressure is released from vacuum passage 156 and seal
238 is broken. In other words, inlet cap 232 is just pulled off of alternative vacuum plenum
152a as soon as vacuum is cut from vacuum passage 156, or rotary e ng
machine 100 is shut down, without releasing any clamps or wing any joints.
According to another aspect of removable vacuum inlet cap assembly 230,
cleaning solution delivery tube 9 is inserted through an aperture 240 formed through inlet
cap 232, for e substantially at the center thereof. Delivery tube 9 is sealed in
aperture 240 of inlet cap 232, for example by a threaded joint, an o-ring joint, or another
sealed coupling 242 therebetween.
Delivery tube 9 is removably extended through central vacuum e 156
into cleaning fluid expansion chamber 148 of cleaning fluid distribution manifold 144
h a sealing plate 244 thereof positioned between vacuum passage 156 and cleaning
fluid expansion chamber 148. Delivery tube 9 is removably extended into cleaning fluid
expansion chamber 148 through an r g coupling 246 and forms central sprue
hole 146. For example, a smooth tubular end 9a of delivery tube 9 distal of inlet cap 232
extends through an aperture 248 in a hub or stem portion 250 of sealing plate 244 in sealed
coupling 246. For example, sealing coupling 246 includes one or more seals which are
compressed in aperture 248 between delivery tube 9 and stem portion 250 of sealing plate
31/10/13,op2358 speci,20
244. Here, sealed coupling is one, two, three (shown) or more elastomeric o-ring seals
compressed between delivery tube 9 and stem portion 250 of sealing plate 244, y
smooth tubular end 9a of delivery tube 9 is slidably engageable with sealed coupling 246
in sealing plate 244 simply by pushing inlet cap 232 into engagement with open end 152b
of alternative vacuum plenum 152a. Likewise, smooth tubular end 9a of delivery tube 9 is
slidably disengageable from sealed coupling 246 with sealing plate 244 simply by pulling
inlet cap 232 from open end 152b of alternative vacuum plenum 152a, as disclosed herein.
is an exploded view showing smooth tubular end 9a of delivery
tube 9 gly withdrawn from aperture 248 in stem n 250 of sealing plate 244 and
disengaged from sealing coupling 246 therewith when vacuum inlet cap assembly 230 is at
least partly removed from alternative vacuum plenum 152a.
illustrates one novel ute ofremovable vacuum inlet cap
assembly 230 operating with alternative vacuum plenum 152a, which novel attribute is an
ability to easily and substantially automatically clean built-up hair, fibers and other debris
252 from a position wrapped and twisted around solution delivery tube 9. Inventor has
determined a tendency for longer hair, fibers and other debris to twist around delivery tube
9 where it passes through vacuum passage 156. Such elongated contaminants are sucked
into vacuum passage 156 through shoe vacuum extraction passages 136 and annular
suction or vacuum extraction passage 136a during operation of rotary surface ng
machine 100. Build-up of such long fibers can exacerbate ment of smaller
contaminants that can reduce efficiency of the cleaning tool, and may be detrimental to the
cleaning tool, and potentially to the entire cleaning , as disclosed herein. Therefore,
it is beneficial to the operational efficiency and longevity of rotary surface cleaning
e 100 to clean delivery tube 9 of such longer hair, fibers and other debris as may
become wrapped and twisted there around. To this end, delivery tube 9 is substantially
smooth over a lengthwise portion 9b thereofbetween inlet cap 232 of vacuum inlet cap
assembly 230 and smooth tubular distal end 9a of delivery tube 9. wise portion 9b
of delivery tube 9 may be substantially straight, as shown, or may taper toward distal end
9a. Inventor has determined that such contaminants may be easily removed from
lengthwise portion 9b of ry tube 9 by ion of vacuum suction source 25. It has
been determined that merely presenting distal end 9a of delivery tube 9 to vacuum suction
31/10/13,op2358 speci,21
source 25, whereby built-up hair, fibers and other debris 252 are sucked from smooth
lengthwise portion 9b of delivery tube 9 over smooth distal end 9a.
Accordingly, alternative vacuum plenum 152a of the invention having
removable vacuum inlet cap assembly 230 is a significant novel improvement over
conventional vacuum s of the prior art as to be an independently patentable feature.
illustrates rotary surface ng tool 124 of the rotary surface
ng machine 100 illustrated in through wherein rotary surface cleaning
tool 124 is drivingly connected, for example but without limitation, by a drive gear to
rotary drive output 128 of on—board power plant 122. Here, by example and without
limitation, rotary surface cleaning tool 124 is a large rotor that is fixedly attached to a
rotary drive member 160 h a fixed coupling 162, such as a plurality of threaded
fasteners ) or other conventional fixed coupling means. Rotary drive member 160
es circumferential tooth gear 130 disposed about the circumference thereof for
operating as the drive gear coupled to rotary drive output 128 of on—board power plant 122.
Rotary drive member 160 is mounted to cylindrical sleeve extension 138 of
rotor hub member 140 that is in turn joumaled in bushing 142. See, for example,
The large rotor of rotary surface cleaning tool 124 is fitted with central sprue hole 146 and
includes expansion chamber 148 and the plurality of individual closed liquid cleaning fluid
distribution channels 150, as well as the plurality of spray nozzle arrays 132 that are
mly distributed across the bottom cleaning surface of rotary surface cleaning tool
124. The large rotor of rotary surface cleaning tool 124 also includes individual vacuum
ld branch es 154 that each communicate in turn with central vacuum passage
156 of rotor hub member 140, as well as the plurality suction or vacuum extraction
passages 136 of respective suction extraction shoes 126 located on rotary surface cleaning
tool 124 and projected from open lower axial face 112 of housing dome 110.
illustrates vacuum manifold 155 formed in an upper coupling
surface 164 of rotary surface cleaning tool 124 of the rotary surface cleaning machine 100
illustrated in through as further illustrated in . The large rotor of
rotary surface cleaning tool 124 is again rated as including expansion r 148
31/10/13,0p2358 speci,22
and the plurality of individual closed liquid cleaning fluid distribution channels 150 that
communicate with the plurality of spray nozzle arrays 132 distributed across the bottom
cleaning surface of rotary surface cleaning tool 124. Here, rotary drive member 160 is
removed to more clearly show vacuum manifold 155 having individual vacuum manifold
branch passages 154 that each icate in turn with central vacuum passage 156 of
rotor hub member 140. Each individual vacuum manifold branch passage 154 terminates in
a fluid extraction e 166 of about identical radial lengths 168 positioned adjacent to
the circumference of the large rotor of rotary surface cleaning tool 124. In assembly, each
shoe 126 is coupled to the lower face of rotary surface ng tool 124 with respective
suction or vacuum extraction passages 136 in communication with a respective fluid
extraction passage 166 of one of the individual vacuum manifold branch passages 154. As
illustrated here by e and without limitation, individual vacuum ld branch
passages 154 optionally include a curved portion 170 inwardly of respective fluid
extraction passage 166. Optional curved portion 170 of vacuum manifold branch es
154, when present, operate to urge generation of a Coriolis effect in a suction or vacuum
fluid extraction airstream ed into l vacuum passage 156 of rotor hub member
140.
A illustrates one rotary e cleaning tool 125 of a rotary surface
cleaning machine of the prior art having a vacuum manifold 123, wherein individual
vacuum manifold branch passages 127 each communicate with a central vacuum passage
(not shown) through an expansion chamber 129. As illustrated here, vacuum manifold
branch passages 127 each form a substantially straight radial passages radiating from
central expansion chamber 129 to fluid extraction es 131. Suction action (arrows
133) generated by vacuum source 25 operates to pull air and soiled liquid cleaning fluid
ly away from fluid extraction passages 131 and toward central expansion chamber
129. However, centrifugal force (arrows 135) generated by high speed rotary motion
(arrow 139) ofrotary surface cleaning tool 125 aneously operates to push such air
and soiled liquid cleaning fluid outwardly away from central expansion chamber 129 and
toward fluid extraction passages 131. Thus, in prior art machines, centrifugal force (arrows
135) of rotary surface cleaning tool 125 generated by its high speed rotary motion (arrow
139) es oppositely in vacuum manifold branch es 127 from suction action
(arrows 133) generated by vacuum source 25. Therefore, centrifugal force s 135) of
31/10/13,op2358 speci,23
rotary surface cleaning tool 125 opposes and actually reduces the force of suction action
s 133) which is relied upon by the rotary surface cleaning machine for retrieving the
soiled cleaning fluid. In effect, the centrifugal force (arrows 135) of rotary e cleaning
tool 125 opposes and actually reduces the effectiveness of the rotary surface cleaning
machine by reducing the force of suction action (arrows 133) for retrieving the soiled
cleaning fluid since suction action force (arrows 133) must first overcome fugal force
(arrows 135) of rotary surface ng tool 125 before operating to extract soiled liquid
cleaning fluid from carpet 57 and pull extracted cleaning fluid inwardly away from fluid
tion passages 131.
Referring again to , in st to prior art rotary surface cleaning
tools n vacuum manifold branch passages 127 consist of substantially straight radial
passages radiating from central expansion chamber 129 to fluid extraction es 131,
the present invention rather provides al curved portion 170 that, when present,
actually generates a pumping action (arrows 270) of the suction re generated in
vacuum manifold branch passages 154 by vacuum source 25. Pumping action 270 is
actually driven by centrifugal force (arrow 135) generated by high speed rotary motion
(arrow 139) of rotary surface cleaning tool 125, whereby centrifugal force (arrow 135)
operates in combination with shape of curved portion 170 to accelerate extracted air and
soiled liquid cleaning fluid rapidly inwardly away from fluid extraction passages 131 and
toward central expansion chamber 129. Accordingly, curved n 170 of vacuum
manifold branch passages 154 of the invention is a significant novel ement over the
substantially ht radial vacuum manifold branch passages 127 of the prior art as to be
an independently patentable e.
illustrates a bottom operational surface 172 of rotary surface
ng tool 124 of the rotary surface cleaning machine 100 illustrated in through
as further illustrated in and . The large rotor of rotary surface
cleaning tool 124 is again illustrated as including expansion chamber 148 and the plurality
of individual closed liquid cleaning fluid distribution channels 150 that communicate with
the pluralities of spray nozzle arrays 132 distributed across the bottom operational surface
172 ofrotary surface cleaning tool 124. Spray nozzle arrays 132 are illustrated here by
example and without limitation as radially oriented arrays of pluralities of individual
31/10/13,op2358 speci,24
delivery spray nozzles 174 of about 0.01 to about 0.03 inch in diameter formed through
bottom operational surface 172 of rotary surface cleaning tool 124, for e by
mechanical, chemical or laser drilling, into communication with tive individual
closed liquid cleaning fluid distribution channels 150 for ry therethrough of the
pressurized hot liquid solution of cleaning fluid. As illustrated here by example and
without limitation, each spray nozzle array 132 consists of a plurality of individual delivery
spray nozzles 174 substantially uniformly distributed over a substantially identical r
portion 176 of bottom operational surface 172 extended between an inner radial limit 178
and an outer radial limit 180 thereof, wherein annular n 176 covered by ry
spray nozzles 174 has about the same radial extents as radial length 168 of fluid extraction
passages 166 of suction extraction shoes 126, and wherein inner radial limit 178 is about
identical with an inner terminus 166a of fluid extraction es 166 and outer radial limit
180 is about identical with an outer terminus 166b of fluid extraction es 166.
Therefore, delivery spray nozzles 174 are distributed over annular portion 176 that is
substantially radially coextensive with fluid extraction passages 166.
Each individual fluid extraction passage 166 is positioned adjacent to the
circumference of the large rotor of rotary e cleaning tool 124 and oriented
substantially radially thereof approximately halfway between adjacent cleaning on
delivery spray nozzle arrays 132. As illustrated here by example and without limitation,
each individual fluid extraction passage 166 is positioned in a shoe recess 182 formed into
rotary surface cleaning tool 124 below bottom operational surface 172 thereof. Each shoe
recess 182 is appropriately sized and shaped to receive thereinto one suction extraction
shoe 126 with its nding flange portion 184 being substantially flush with bottom
operational surface 172 of rotary surface cleaning tool 124.
Optionally, a plurality of lightening holes or recesses 186 are provided to
reduce the weight of rotary surface cleaning tool 124.
is a detail View of one embodiment of n tion shoe 126
of the rotary surface cleaning machine 100 illustrated in through As
disclosed herein above, n extraction shoe 126 is structured to sit in recess 182 flush
or below bottom operational surface 172 of rotary surface cleaning tool 124. Accordingly,
31/10/13,0p2358 speci,25
flange portion 184 surrounding each suction extraction shoe 126 is structured for being
fixed to bottom operational surface 172 of rotary surface cleaning tool 124 within shoe
recess 182. Optionally, suction extraction shoe 126 may include a sealing member 187
structured to fit into preformed slots in bottom operational e 172 of rotary surface
cleaning tool 124 and form a substantially airtight seal therewith to concentrate the force of
the fluid extraction suction generated by the vacuum force supplied by vacuum source 25
into individual fluid extraction passages 136 of shoes 126.
Here, suction extraction shoe 126 is shown as having a leading surface 188
and a trailing surface 190 as a function of the rotational direction (arrow 158) of rotary
surface cleaning tool 124. As shown here, leading surface 188 is shown by example and
without limitation as having an al relatively raised portion 192 thereof that stands
out r from bottom ional surface 172 of rotary e cleaning tool 124 than a
vely lower or recessed portion 194 of trailing surface 190. When optional raised
portion 192 of suction extraction shoe 126 is present, optional raised portion 192 of suction
extraction shoe 126 causes a “washboard” ing effect of a moveable target surface,
i.e. carpet surface, wherein up—down ations of the moveable carpet are caused by
ate application of vacuum suction and shoe compression of carpet 57. In other words,
the target carpet 57 is initially sucked up toward recessed trailing portion 194 of shoe 126
and operational surface 172 by one suction tion passage 136, and then ed back
down by optional raised portion 192 of leading surface 188 of a next consecutive suction
extraction shoe 126, as illustrated in , before being immediately sucked up again by
the suction extraction passage 136 of the same next consecutive suction extraction shoe
126. This alternate vacuum n and shoe compression of carpet 57 is repeated by each
next consecutive suction extraction shoe 126 as a function of the combination of recessed
trailing portion 194 and raised leading surface portion 192. Since rotary surface cleaning
tool 124 turns at a high speed rotary motion these up-down oscillations of the moveable
carpet are repeated at least one, two or several times each , which results in
significantly aggressive agitation of the target carpet 57 in combination with the fluid
cleaning.
atively, rotational ion (arrow 158) of rotary surface cleaning
tool 124 is reversed, whereby optional raised portion 192 is positioned on trailing surface
31/10/13,op2358 speci,26
190 as a function of the reversed rotational direction (arrow 158a shown in Figure 15).
Accordingly, the “washboar ” scrubbing effect of the moveable target surface, i.e. carpet
surface, is accomplished by the recessed leading surface 188 and optional raised portion
192 of each suction tion shoe 126 in turn. Furthermore, as illustrated here each
suction extraction shoe 126 optionally further es an extension portion 126a that
overhangs an outer end portion 184a of its nding flange portion 184. Extension
portion 126a s extraction passages 136 to extend radially outwardly of cleaning tool
operational surface 172 beyond the radial extent of fluid extraction passages 166 of rotary
surface cleaning tool 124. Accordingly, when optional extension portion 126a is present,
suction extraction passages 136 extend nearly to outer circumference 124a of the large
rotor of surface cleaning tool 124, as illustrated in .
is a detailed cross-section View of one ment of suction
extraction shoe 126 illustrated in , wherein suction tion shoe 126 is shown as
having leading surface 188 and trailing surface 190 as a on of the rotational direction
(arrow 158) of rotary surface cleaning tool 124. As shown here, leading surface 188 is
shown by example and without limitation as having optional raised portion 192 f that
stands out further from bottom operational surface 172 of rotary surface cleaning tool 124
than relatively lower or recessed portion 194 of trailing surface 190.
illustrates bottom operational surface 172 of rotary surface cleaning
tool 124 of the rotary surface cleaning machine 100 illustrated in through
having n extraction shoe 126 with optional raised surface portion 192 formed on
leading surface 188 and vely lower or recessed surface portion 194 formed on trailing
surface 190 as illustrated in and . Here, suction extraction shoe 126 is
illustrated having optional raised surface portion 192 leading and relatively lower or
recessed surface portion 194 trailing as a function of the optional counterclockwise
onal direction (arrow 158) of rotary surface cleaning tool 124. It will be understood
that n extraction shoes 126 and rotational direction 158 of rotary surface cleaning
tool 124 is al and can be reversed such that the onal leading surface 188 and
functional trailing surface 190 portions f are maintained. Accordingly, reversal of
rotational directionality 158 of rotary surface cleaning tool 124 disclosed herein by
example and without limitation is also contemplated and may be substituted without
31/10/13,op2358 speci,27
deviating from the scope and intent of the t invention. n extraction shoe 126
are attached to bottom operational surface 172 of rotary surface cleaning tool 124 by
attachment means 196, such as but not limited to one or more threaded ers.
Furthermore, during rotational direction (arrow 158) of rotary surface
cleaning tool 124 n leading surface 188 of suction extraction shoe 126 includes
relatively raised portion 192, relatively raised portion 192 of leading surface 188 operates
to compress or squeeze carpet 57 down upon passing, while relatively recessed portion 194
of trailing surface 190 permits vacuum source 25 through operating through vacuum
extraction passage 136 to lift carpet 57.
atively, during opposite rotational direction (arrow 158a shown in
Figure 15) of rotary surface cleaning tool 124 wherein leading surface 188 of suction
extraction shoe 126 includes relatively recessed portion 194, relatively recessed portion
194 of g surface 188 permits vacuum source 25 h operating through vacuum
tion passage 136 to lift carpet 57, while relatively raised portion 192 of ng
surface 190 operates to compress or squeeze carpet 57 down upon passing. Therefore,
regardless of rotational ion (arrow 158 or arrow 158a) of rotary surface cleaning tool
124, each individual suction extraction shoe 126 having relatively raised and ed
portions 192, 194 further operates as a scrub board for generating a “washboard” scrubbing
effect on the moveable carpet 57 by alternately compressing and lifting thereof.
Accordingly, suction extraction shoe 126 of the invention having the combination of
relatively raised and recessed portions 192, 194 is a significant novel improvement over
conventional suction extraction shoes of the prior art as to be an independently patentable
feature.
illustrates bottom operational surface 172 of rotary surface ng
tool 124 of the rotary e ng machine 100 illustrated in through
having a spiral pattern of cleaning solution delivery spray nozzle arrays 132 of individual
delivery spray nozzles 174, wherein each spray nozzle array 132a, 132b, 132C, 132d and
1326 is shorter in extent than annular portion 176. For example, each spray nozzle array
132a, 132b, 1320, 132d and 1326 consists of one to about four individual delivery spray
nozzles 174, and wherein individual spray nozzle arrays 132a, 132b, 1320, 132d, 1326 are
31/10/13,0p2358 speci,28
oned in a spiral pattern 198 across bottom ional surface 172 of rotary surface
cleaning tool 124 that is substantially radially coextensive with radial lengths 137 of fluid
extraction es 136 of shoes 126 between the extremes of annular portion 176 between
inner radial limit 178 and outer radial limit 180. The spiral pattern 198 of spray nozzle
array 132a, 132b, 1320, 132d, 132e optionally proceeds in a uniform stepwise manner
around bottom operational e 172 of rotary e cleaning tool 124, with nozzle
array 132a being nearest to a center point 200 of operational surface 172 and substantially
radially coextensive with inner radial limit 178 and each consecutive nozzle array 132a,
132b, 1320, 132d, 132e ng r outwardly therefrom toward outer radial limit 180
of operational surface 172. Alternatively, the stepwise manner of spiral n 198 of
spray nozzle arrays 132a, 132b, 1320, 132d, 132e alternatively proceeds in a non-uniform
manner (shown) wherein one or more of spray nozzle arrays 132a, 132b, 1320, 132d, 1326
is optionally out of step with an adjacent one of spray nozzle arrays 132a, 132b, 132C,
132d, 132e. Thus, spiral pattern 198 of spray nozzle arrays 132a, 132b, 1320, 132d, 1326 is
optionally either uniformly stepwise between inner radial limit 178 and outer radial limit
180 of radial lengths 168 of fluid extraction passages 136 of shoes 126, else spiral pattern
198 proceeds in a non-uniform manner. Spiral pattern 198 of spray nozzle arrays 132a,
132b, 1320, 132d, 132e proceeds in either a clockwise manner between inner radial limit
178 and outer radial limit 180 of radial lengths 137 of fluid tion passages 136 of
shoes 126, else spiral pattern 198 proceeds in a counterclockwise manner without
departing from the spirit and scope of the invention.
The spiral pattern 198 of spray nozzle arrays 132a, 132b, 1320, 132d, 132e
is effective for delivery of cleaning solution at least e, as disclosed herein, rotary
surface cleaning tool 124 turns at a high rate during operation, whereby each spray nozzle
array 132a, 132b, 1320, 132d, 132e delivers the rized hot liquid solution of cleaning
fluid to the target floor surface at least one, two or more times each second. Furthermore,
dividing spray nozzle arrays 132 into several spray nozzle arrays 132a, 132b, 1320, 132d,
132e reduces the number of individual delivery spray nozzles 174 that have to be drilled or
otherwise formed through bottom operational surface 172 of rotary surface cleaning tool
124 by a factor of the number of spray nozzle arrays 132 otherwise provided in rotary
surface cleaning tool 124. Here, as illustrated in , there are five radial rows of spray
nozzle arrays 132 across operational surface 172. By dividing spray nozzle arrays 132 into
31/10/13,op2358 speci,29
several spray nozzle arrays 132a, 132b, 1326, 132d, 1326, the total number of individual
delivery spray nozzles 174 that have to be provided in bottom operational surface 172 is
reduced by a factor of five, so that only one-fifth or twenty t of the number of
delivery spray nozzles 174 that have to be provided in bottom operational surface 172.
Delivery spray nozzles 174 are very expensive to drill or otherwise form e they are
only about 0.02 inch in diameter. Therefore, a large cost savings is gained, while the
delivery of cleaning on does not suffer. A further advantage of dividing spray nozzle
arrays 132 into several spray nozzle arrays 132a, 132b, 1326, 132d, 1326 is that the
cleaning solution is delivered with substantially uniform pressure across the entire radius
of rotary e ng tool 124 between inner radial limit 178 and outer radial limit
180, without resorting to special design es normally required in the prior art to
provide uniform pressure across each spray nozzle arrays 132 that extends all of the entire
annular portion 176 between inner radial limit 178 and outer radial limit 180 and
substantially radially coextensively with fluid extraction passages 136 of suction extraction
shoes 126. Therefore, the optional spiral pattern 198 of spray nozzle arrays 132a, 132b,
1326, 132d, 1326, when present, provides both the economic advantage not known in the
prior art of forming fewer ive delivery spray s 174 for multiple spray nozzle
arrays 132 provide across the entire length of annular portion 176 coextensively with fluid
extraction passages 136 of shoes 126, and the technological advantage not known in the
prior art of providing substantially uniform ng solution delivery pressure across
bottom operational surface 172 of rotary surface ng tool 124 for the entire length of
annular portion 176 without developing special fluid delivery features normally required in
the prior art.
Optionally, one or more e brushes 202 may be provided across bottom
operational surface 172 of rotary surface cleaning tool 124 adjacent to cleaning solution
delivery spray nozzle arrays 132, or the al spiral pattern 198 of spray nozzle arrays
132a, 132b, 1326, 132d, 1326, when present. Bristle brushes 202 may be provided
substantially radially coextensively with fluid extraction passages 136 of suction extraction
shoes 126 and either adjacent ng solution delivery spray nozzle arrays 132, or the
optional spiral pattern 198 of spray nozzle arrays 132a, 132b, 1326, 132d, 1326, when
present. Optionally, either multiple radial rows bristle s 202 may be provided, else
single radial rows of bristle brushes 202 may be provided. Bristle brushes 202 both (1)
31/10/13,op2358 speci,30
separate fibers of rug 57 for dry removal of dust, dirt and other particles, and (2) provide a
more aggressive cleaning action in cleaning when provided in combination with fluid
cleaning of carpet or other target flooring surface.
A illustrates bottom operational surface 172 of rotary surface
cleaning tool 124 of the rotary surface cleaning machine 100 having an alternative
configuration of the spiral pattern of cleaning solution delivery spray nozzle arrays 132 of
individual delivery spray nozzles 174 from that shown in , with or without brushes
202. Here, at least one or more of the plurality of spray nozzle arrays 132a, 132b, 1320,
132d and 132e is shorter in extent than annular portion 176, and at least one or more of the
plurality of spray nozzle arrays 132a, 132b, 1320, 132d and 132e is replaced by array 132
that across substantially the entire annular portion 176 between inner radial limit 178 and
outer radial limit 180, as illustrated for example in .
For e, spray nozzle arrays 132b, 1320, 132d are shorter in extent than
annular portion 176 and each consists of one to about four (three shown) individual
delivery spray nozzles 174 that are positioned in spiral pattern 198 across bottom
operational surface 172 of rotary surface ng tool 124 between inner radial limit 178
and outer radial limit 180 and between the extreme positions of spray nozzle array 132a
and 132e shown in . Additionally, full length spray nozzle arrays 132 are
substituted for shorter spray nozzle arrays 132a and 132e nt to inner radial limit 178
and outer radial limit 180 at the extremes of annular portion 176 as shown in .
Accordingly, spray nozzle arrays 132 extend substantially the full length of annular portion
176 n inner radial limit 178 and outer radial limit 180, as illustrated for example in
. Thus, spiral n 198 is ed by a ation semi-spiral pattern 199
consisting of a combination of a plurality of full length spray nozzle arrays 132 with a
plurality of shorter spray nozzle arrays 132b, 1320, 132d g a spiral pattern between
the extreme positions of spray nozzle array 132a and 132e, as shown in .
Combination semi-spiral pattern 199 of full length spray nozzle arrays 132
and shorter spray nozzle arrays 132b, 1320, 132d is believed to most efficiently r the
pressurized hot liquid solution of cleaning fluid to the target floor e, while
minimizing the number of delivery spray nozzles 174 that have to be provided in bottom
31/10/13,op2358 speci,31
operational surface 172 and simultaneously delivering a substantially uniform supply of
cleaning solution to the target floor or rug 57 surface. Combination semi-spiral pattern 199
simultaneously delivers a minimal quantity of cleaning solution to the target floor or rug 57
surface, which in turn minimizes the amount of spent fluid to be extracted by cleaning
machine 100 and also minimized the time required to dry the rug 57.
Accordingly, combination semi-spiral pattern 199 of the invention having
full length spray nozzle arrays 132 in combination with a plurality of shorter spray nozzle
arrays 132b, 1320, 132d is a significant novel improvement over conventional patterns of
spray nozzle arrays of the prior art as to be an independently patentable feature, as
discussed in more detail herein below.
Furthermore, orifices 175 of a first plurality of individual delivery spray
nozzles 174 are optionally sized larger, and orifices 177 of a first plurality of dual
ry spray nozzles 174 are optionally sized smaller than orifices 175. Larger and
smaller spray nozzle orifices 175, 177 cause cleaning machine 100 to provide a deep clean
ofrug 57, while simultaneously providing a surface clean of rug 57. Here, larger sized
orifices 175 of spray nozzles 174 deliver cleaning solution at a lower pressure that
ates only the surface of rug 57, while smaller sized orifices 177 of spray nozzles 174
deliver cleaning solution at a higher pressure that ates to the core ofrug 57. For
e, the larger sized orifices 175 of spray nozzles 174 are as much as 2 to 3 times
larger than the smaller sized orifices 177 of spray s 174. Accordingly, r sized
orifices 177 of a portion of spray nozzles 174 may be sized on the order of about 0.01 inch
in diameter to 0.03 inch in diameter. The larger sized orifices 175 of a portion of spray
s 174 may be sized relatively larger than r sized orifices 177.
According to one embodiment, one of full length spray nozzle arrays 132
and one or more of shorter spray nozzle arrays 132b, 1320, 132d t of spray nozzles
174 having r sized orifices 177, while a different one of filll length spray nozzle
arrays 132 and a different one or more of shorter spray nozzle arrays 132b, 132e, 132d
consist of spray nozzles 174 having larger sized orifices 175, whereby combination
semi-spiral pattern 199 of the ion includes a substantially uniform combination of
31/10/13,op2358 speci,32
spray nozzles 174 having both larger and smaller sized orifices 175, 177 for substantially
simultaneously delivering cleaning solution at both lower and higher re.
Alternatively, one or more of full length spray nozzle arrays 132 and one or
more of shorter spray nozzle arrays 132b, 132c, 132d optionally consist of spray nozzles
174 having a combination ofboth larger and smaller sized orifices 175, 177.
Furthermore, the pattern of spray nozzle arrays 132 illustrated in
optionally consist of spray nozzles 174 having a combination of both larger and smaller
sized orifices 175, 177. For example, alternating ones of full length spray nozzle arrays
132 in consist of spray nozzles 174 having both larger and smaller sized orifices
175, 177. Alternatively, each of full length spray nozzle arrays 132 in consist of
spray s 174 having both larger and smaller sized orifices 175, 177, for example
alternating between larger and smaller sized spray nozzle orifices 175, 177.
ingly, a ation of the invention having a ity of spray
nozzles 174 having relatively larger sized nozzle orifices 175 in ation with a
plurality of spray nozzles 174 having relatively smaller sized nozzle orifices 177 is a
significant novel improvement over conventional patterns of spray nozzles of the prior art
having nozzle orifices of only a single size as to be an independently patentable feature, as
discussed in more detail herein below.
is a detail View of another ment of suction extraction shoe
126 of the rotary surface cleaning machine 100 illustrated in through and
is a detailed cross-section View of the embodiment of suction extraction shoe 126
rated in . Here, leading surface 188 does not include the optional raised
portion 192. Therefore, leading surface 188 of suction extraction shoe 126 is substantially
coplanar with trailing surface 190. However, g surface 188 rather includes one or
more bristle brushes 204 in one or more rows arranged along an outermost portion 206
thereof. Accordingly, bristle brushes 204 are substituted for optional raised portion 192 of
shoe leading surface 188 and stands out further from bottom ional surface 172 of
rotary surface cleaning tool 124 than relatively lower or recessed portion 194 of ng
surface 190. Raised e s 204 of shoe leading surface 188 operate similarly to
31/10/13,0p2358 speci,33
optional raised portion 192 disclosed herein. When al raised bristle brushes 204 of
suction extraction shoe 126 is present on shoe g surface 188, optional raised bristle
brushes 204 cause a “washboard” scrubbing effect of the moveable target surface, i.e.
carpet surface, wherein up-down oscillations of the moveable carpet is caused by
alternately application of vacuum n and shoe compression of carpet. In other words,
the target carpet is sucked up into narrow n or vacuum extraction passage 136, and
then squeezed back down by optional raised bristle brushes 204 of leading e 188 of
next consecutive suction extraction shoe 126, as illustrated in .
Similarly to optional bristle brushes 202 on bottom operational surface 172
of rotary surface cleaning tool 124, optional raised bristle brushes 204 on leading surfaces
188 of suction extraction shoes 126 provide a more aggressive cleaning action in cleaning
when provided in combination with fluid cleaning of carpet or other target flooring surface.
Furthermore, when present optional raised bristle brushes 204 effectively
raise bottom operational surface 172 of rotary surface cleaning tool 124 slightly away from
target floor surface. Accordingly, rotary e cleaning tool 124 can be alternated
between carpeting and hard floor surfaces such as wood, tile, um and natural stone
flooring, without possibility of ng or other damage to either operational surface 172
ofrotary surface cleaning tool 124 or the hard floor es.
illustrates operational surface 172 of rotary surface cleaning tool
124, wherein suction extraction shoes 126 are red with substantially coplanar
g and trailing surfaces 188, 190 and shoe g surfaces 188 are configured with
one or more bristle brushes 204 in one or more rows arranged along outermost portions
206 thereof.
illustrates rotary surface cleaning tool 124 as disclosed herein,
wherein each suction extraction shoe 126 is supported in bottom operational surface 172
by a biasing means 208 structured for individually biasing each suction extraction shoe 126
outwardly relative to bottom operational surface 172 of rotary surface cleaning tool 124.
31/10/13,op2358 speci,34
Additionally, it is generally well known that if a n slot directly
contacts rug 57 or another floor, the suction tool virtually locks onto the rug 57 or floor and
s immovable. Therefore, the suction tool must be spaced away from the rug 57 or
floor to permit some airflow which prevents such vacuum lock-up. Airflow is also
necessary for drying the carpet 57 or floor. However, the airflow must be very near the rug
57 or floor to be effective for drying. Also, excessive airflow decreases the vacuum force
supplied by the fluid cleaning system. Thus, there is a trade-offbetween distancing the
suction slot from the rug 57 or floor to prevent vacuum lock-up and ensuring mobility on
the one hand, and on the other hand positioning the n slot as near to the rug 57 or
floor as le for maintaining the vacuum force supplied by the fluid cleaning system
for maximizing airflow to e drying.
As disclosed herein, suction extraction passages 136 are oriented
substantially dicular to the rclockwise or clockwise rotary motion (arrows
158, 158a) of cleaning tool 124, i.e., oriented substantially radially with respect to cleaning
tool operational surface 172. Here, suction extraction shoe 126 includes a plurality of
shallow vacuum or suction relief grooves 216 formed across its leading surface 188 and
oriented substantially perpendicular to suction tion passages 136, whereby suction
relief grooves 216 lie substantially along the rotary motion (arrows 158, 158a) of cleaning
tool 124. Shallow suction relief grooves 216 operate to increase airflow to suction
extraction passages 136, while permitting the cleaning tool operational surface 172 to be
positioned directly against the rug 57 or floor, whereby moisture tion is maximized.
Another advantage of orienting suction relief grooves 216 along the rotary motion s
158, 158a) of cleaning tool 124 is that suction relief grooves 216 are carpet pile enters into
suction relief grooves 216 when cleaning tool operational surface 172 moves across rug 57.
This permits airflow to be pulled through the rug 57 between fiber bundles that make up
the carpet pile so that the rotary motion of cleaning tool 124 is not wasted.
The quantity and actual dimensions of n relief grooves 216 on suction
extraction shoes 126 is subject to several factors, including but not limited to, the size and
number of suction extraction shoes 126 on operational surface 172 of rotary cleaning tool
124, width and length dimensions of suction extraction passages 136, and the vacuum
force generated by the n source, as well as the rotational velocity of cleaning tool
31/10/13,op2358 speci,35
operational surface 172. When relatively raised portion 192 is present in contrast to
relatively lower or recessed portion 194, the resulting height differences between leading
surface 188 and trailing surface 190 also affect the quantity and actual dimensions of
suction relief grooves 216 on suction extraction shoes 126. ally, n relief
grooves 216 are also optionally positioned on either one or both of leading surface 188 and
ng surface 190 of suction extraction shoes 126. When positioned on both leading
surface 188 and trailing surface 190 of suction extraction shoes 126, n relief grooves
216 are also optionally staggered n leading and trailing surfaces 188, 190 as shown.
Furthermore, the inventors have found that, when optional suction relief grooves 216 of
suction extraction shoe 126 are present, suction relief grooves 216 of suction extraction
shoe 126 is effective for producing the completely cted and unpredicted yet
desirable result of ting the “washboar ” scrubbing effect of
a moveable target
surface, i.e. carpet surface, wherein up-down oscillations of the moveable carpet are caused
by alternate application of vacuum suction and shoe compression of carpet 57. In other
words, the target carpet is initially sucked up toward recessed suction relief grooves 216 of
shoe 126 and operational surface 172 by one suction extraction passage 136, and then
squeezed back down by surrounding leading or trailing surfaces 188, 190 of suction
tion shoe 126, before being immediately sucked up again by the suction extraction
passage 136 of the same or an adjacent suction relief grooves 216. This alternating vacuum
suction and shoe compression of carpet 57 is repeated constantly by each alternate
encounter with surrounding leading or trailing surfaces 188, 190 of n extraction shoe
126 between encounters with adjacent suction relief grooves 216 as a function of the
frequency of combination of recessed suction relief grooves 216 within surrounding
leading or trailing surfaces 188, 190. The high speed rotary motion of rotary e
cleaning tool 124 causes these up-down oscillations of the le carpet are repeated at
least one, two or several times each second as a function of the rotational speed (arrows
158, 158a) of rotary e cleaning tool 124, which results in significantly aggressive
agitation of the target carpet 57 in combination with the fluid cleaning. The size, ty,
relative positioning and distribution and of suction relief grooves 216 is a function of all
these factors, but can be determined for any rotary surface cleaning machine 100 without
undue experimentation.
31/10/13,op2358 speci,36
is a cross-section View of rotary surface ng tool 124 as
disclosed herein, wherein both g surface 188 and trailing e 190 of suction
extraction shoes 126 are illustrated as including suction relief grooves 216.
Here, biasing means 208 is structured by example and t limitation as
a resilient cushion, such as a closed-cell foam rubber cushion of about one—quarter inch
thickness or thereabout, that is positioned n flange portion 184 of each shoe 126 and
rotary surface cleaning tool 124. For example, each shoe recess 182 is recessed deeper into
bottom operational surface 172 of rotary surface cleaning tool 124 than a thickness of shoe
flange portion 184, whereby each shoe recess 182 is appropriately sized to receive resilient
g n 208 between an interface surface 210 of flange portion 184 of suction
extraction shoe 126 and a floor portion 212 of shoe recess 182, while a clamping plate 214
is positioned over shoe flange 184 and arranged substantially flush with bottom operational
surface 172 ofrotary surface cleaning tool 124. Accordingly, resilient biasing means 208
permits each suction extraction shoe 126 to “float” individually relative to rotary surface
cleaning tool 124. Individually “floating” each suction tion shoe 126 both effectively
balances rotary surface cleaning tool 124, and causes each individual suction extraction
shoe 126 to be pushed deeper into portions of carpet that may be oned over small
recesses in a t substrate floor surface, as well as pushing causes each individual
suction extraction shoe 126 deeper into portions of a non-flat smooth floor surface such as
natural rock, distressed wood, and other non-flat or pitted floor surfaces. Therefore,
dually “floating” each suction extraction shoe 126 in bottom operational surface 172
ofrotary surface cleaning tool 124 cleans carpet and non-carpeted smooth floors alike
more effectively than cleaning tools having fixed suction extraction shoes, as known in the
prior art.
When present as a closed-cell foam cushion, biasing means 208 optionally
also operates as a sealing means n suction extraction shoe 126 and rotary surface
cleaning tool 124. Accordingly, biasing means 208 is structured to form a substantially
airtight seal with shoe recess 182 in bottom operational surface 172 of rotary surface
cleaning tool 124 to trate the force of the fluid extraction suction generated by the
vacuum force supplied by vacuum source 25 into individual fluid tion passages 136
of shoes 126. Optionally, closed-cell foam cushion biasing means 208 is substituted for
31/10/13,op2358 speci,37
sealing member 187 for sealing suction extraction shoe 126 relative to rotary surface
cleaning tool 124. However, although disclosed herein by example and without limitation
as a closed-cell foam rubber cushion, biasing means 208 is optionally provided as any
resilient biasing structure, including one spring or a series of springs, Without deviating
from the scope and intent of the present invention. Accordingly, biasing means alternative
to the closed-cell foam rubber n biasing means 208 disclosed herein by e and
without limitation are also contemplated and may be substituted without deviating from the
scope and intent of the present invention.
Optionally, clamping plate 214 is formed of a non-metallic material, such as
but not limited to a plastic material, while n tion shoe 126 is formed of a
metallic material, such as but not limited to stainless steel material.
is a detail View of another embodiment of n extraction shoe
126 of the rotary surface cleaning machine 100 illustrated in through
n each suction extraction shoe 126 is structured for accomplishing the “washboard”
scrubbing effect of the moveable target e, i.e. carpet surface, independently of the
next consecutive suction extraction shoe 126. Here, suction extraction shoe 126 is again
shown as having functional leading surface 188 and functional trailing surface 190 both as
a function of the reversed rotational ion (arrow 158a) of rotary surfaCe cleaning tool
124, shown as clockwise in Figure 24. As shown here, g surface 188 is shown by
example and without limitation as having optional relatively lower or recessed portion 194,
while trailing e 190 is shown as having optional raised portion 192 thereof that
stands out fithher from bottom operational e 172 ofrotary surface cleaning tool 124
than relatively lower or recessed leading surface portion 194.
When optional recessed portion 194 and raised portion 192 of suction
extraction shoe 126 are present on leading e 188 and trailing surface 190,
respectively, the relative difference in height of recessed leading portion 194 and raised
trailing n 192 combine in each suction extraction shoe 126 to independently operate
the “washboard” ing effect of a moveable target surface, i.e. carpet surface, wherein
n oscillations of the moveable carpet are caused by alternate application of vacuum
suction and shoe compression of carpet 57. In other words, the target carpet 57 is initially
31/10/13,op2358 speci.38
sucked up toward recessed leading portion 194 of suction extraction shoe 126 by the action
of suction or vacuum extraction passage 136, and then squeezed back down by optional
raised trailing portion 192 of trailing surface 190 of the same suction tion shoe 126,
as illustrated in . Each consecutive suction extraction shoe 126 operates
independently of the other suction extraction shoes 126 of rotary surface cleaning tool 124
to operate suction or vacuum extraction passage 136 to initially suck up the target carpet ‘
57 toward ed leading portion 194, before the raised trailing portion 192 of the same
suction tion shoe 126 consecutively sses the target carpet 57 back down
toward the ying floor surface. This ate vacuum n and shoe compression
of carpet 57 is repeated independently by each consecutive suction extraction shoe 126.
Since rotary surface cleaning tool 124 turns at a high speed rotary motion these up-down
ations of the le carpet are repeated at least one or several times each second,
which results in significantly aggressive agitation of the target carpet 57 in combination
with the fluid cleaning.
Additionally, suction extraction shoe 126 is illustrated having a plurality of
shallow vacuum or suction relief grooves 216 formed across relatively raised portion 192
thereof and oriented substantially perpendicular to suction extraction passages 136. Suction
relief grooves 216 are formed across either leading surface 188 or trailing surface 190 as a
fimction of the counterclockwise or clockwise rotary motion (arrows 158, 158a) of
cleaning tool 124. As disclosed herein, suction extraction passages 136 are oriented
substantially radially with respect to cleaning tool operational e 172 and substantially
perpendicular to the counterclockwise or clockwise rotary motion (arrows 158, 158a) of
cleaning tool 124, whereby n relief grooves 216 lie substantially along the rotary
motion (arrows 158, 158a) of cleaning tool 124. Suction relief grooves 216 formed across
relatively raised portion 192 of suction extraction shoe 126 and oriented substantially
ly with respect to cleaning tool operational surface 172 and along the rotary motion
(arrows 158, 158a) of cleaning tool 124 e the advantages disclosed herein. Suction
relief grooves 216 permit suction extraction passages 136 of n extraction shoes 126
to be positioned as near to the rug 57 or floor as possible for maintaining the vacuum force
supplied by the fluid cleaning system for maximizing airflow to promote drying, while
preventing vacuum lock-up and ensuring mobility on the one hand.
31/10/13,op2358 speci,39
Again, as disclosed herein, the quantity and actual dimensions of suction
relief grooves 216 on suction extraction shoes 126 are subject to such factors as the size
and number of suction extraction shoes 126 on operational surface 172 of rotary cleaning
tool 124, the width and length dimensions of suction extraction passages 136, and the
vacuum force generated by the suction source, as well as the rotational velocity of cleaning
tool operational surface 172. When relatively raised n 192 is present in contrast to
relatively lower or recessed portion 194 as shown, the resulting height difference between
g surface 188 and trailing surface 190 also s the quantity and actual dimensions
of suction relief s 216 on suction extraction shoes 126. Optionally, suction relief
grooves 216 are also optionally positioned on relatively raised portion 192 of either of
leading surface 188 or trailing surface 190 of n extraction shoes 126. The size,
quantity, relative positioning and distribution and of suction relief grooves 216 is a
on of all these factors, but can be determined for any rotary surface cleaning machine
100 without undue experimentation.
is a detailed section view of the embodiment of suction
extraction shoe 126 illustrated in , wherein suction extraction shoe 126 is shown as
having leading surface 188 and trailing surface 190 as a function of the reversed clockwise
rotational direction (arrow 158a) of rotary surface cleaning tool 124. As shown here,
leading surface 188 is shown by example and without limitation as having optional
vely lower or recessed portion 194, while trailing e 190 is formed with
relatively raised portion 192 thereof that stands out further from bottom operational surface
172 ofrotary surface cleaning tool 124 than vely lower or recessed portion 194 of
leading surface 188.
rates bottom operational e 172 of rotary surface cleaning
tool 124 of the rotary surface ng machine 100 illustrated in through
having suction extraction shoe 126 with relatively lower or recessed surface portion 194
formed on g surface 188, and optional raised surface portion 192 formed on ng
surface 190 as illustrated in and . Here, rotational direction of rotary
surface cleaning tool 124 is reversed, whereby rotary cleaning tool 124 operates in a
clockwise direction (arrow 158a) in contrast to the counterclockwise direction 158
illustrated in . As illustrated here, optional relatively recessed portion 194 is
31/[0/13,op2358 speci,40
positioned on leading e 188 of suction extraction shoe 124, while relatively raised
portion 192 is oned on trailing surface 190 as a function of the reversed ise
rotational ion (arrow 158a). Accordingly, the “washboard” scrubbing effect of the
moveable target carpet 57 is accomplished by each suction extraction shoe 126 as a
function of the combination therein of recessed portion 194 of g surface 188 and
raised portion 192 of trailing surface 190 in turn engaging the movable target carpet 57.
While the preferred and additional alternative embodiments of the invention
have been illustrated and described, it will be appreciated that various changes can be
made therein without ing from the spirit and scope of the invention. Therefore, it will
be appreciated that various changes can be made therein without departing from the spirit
and scope of the invention. Accordingly, the or makes the following .
Throughout this specification and the claims which follow, unless the
context requires otherwise, the word "comprise", and variations such as "comprises" and
"comprising", will be understood to imply the inclusion of a stated integer or step or group
of integers or steps but not the exclusion of any other integer or step or group of integers or
steps.
The reference to any prior art in this specification is not and should not be
taken as an acknowledgement or any form of suggestion that the prior art forms part of the
common general knowledge.
31/10/13,0p2358 speci,4l
Claims (1)
1. A rotary surface cleaning machine, comprising: a rotary surface cleaning tool coupled for high speed rotary motion ve to a frame member and further comprising a substantially circular operational a high speed rotary driving means coupled for g a high speed rotary motion of the rotary surface cleaning tool; a plurality of substantially radially oriented individual arrays of cleaning solution delivery spray nozzles being substantially uniformly angularly distributed across the operational surface of the rotary surface cleaning tool, the arrays of spray nozzles being coupled in fluid communication with a pressurized flow of cleaning fluid through a plurality of individual liquid cleaning fluid distribution channels of a cleaning fluid distribution manifold portion of the rotary surface cleaning tool, wherein a first plurality of the individual delivery spray nozzles further comprises larger orifices than a second plurality thereof; and a plurality of suction extraction shoes being substantially uniformly angularly distributed across the operational surface of the rotary surface cleaning tool alternately between the arrays of cleaning solution ry spray s and being projected from the operational surface of the rotary surface cleaning tool by a biasing member individually biasing each suction extraction shoe outwardly ve to bottom operational surface of the rotary surface cleaning tool, and each of the n extraction shoes further comprising a fluid tion passage presented adjacent to the operational surface of the rotary surface cleaning tool and ed substantially radially of the ional surface of the rotary surface cleaning tool, each of the fluid extraction passages communicating through one of a plurality of branch passages of a vacuum manifold with a vacuum plenum that is in fluid communication with a vacuum suction source, and n an operational surface of each suction tion shoe further comprises a plurality of suction relief grooves formed cross and oriented substantially crosswise of the fluid extraction passage thereof.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/364,522 | 2012-02-02 | ||
US13/364,522 US9107557B2 (en) | 2011-03-14 | 2012-02-02 | Rotary surface cleaning tool |
NZ599883A NZ599883B (en) | 2012-02-02 | 2012-05-09 | Rotary surface cleaning tool |
Publications (2)
Publication Number | Publication Date |
---|---|
NZ617284A NZ617284A (en) | 2015-01-30 |
NZ617284B2 true NZ617284B2 (en) | 2015-05-01 |
Family
ID=
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