CA1135910A - Vacuum cleaning machine for extracting wet/dry material from a surface - Google Patents
Vacuum cleaning machine for extracting wet/dry material from a surfaceInfo
- Publication number
- CA1135910A CA1135910A CA000342428A CA342428A CA1135910A CA 1135910 A CA1135910 A CA 1135910A CA 000342428 A CA000342428 A CA 000342428A CA 342428 A CA342428 A CA 342428A CA 1135910 A CA1135910 A CA 1135910A
- Authority
- CA
- Canada
- Prior art keywords
- container
- vacuum
- wall
- cover
- machine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L7/00—Suction cleaners adapted for additional purposes; Tables with suction openings for cleaning purposes; Containers for cleaning articles by suction; Suction cleaners adapted to cleaning of brushes; Suction cleaners adapted to taking-up liquids
- A47L7/0004—Suction cleaners adapted to take up liquids, e.g. wet or dry vacuum cleaners
- A47L7/0023—Recovery tanks
- A47L7/0028—Security means, e.g. float valves or level switches for preventing overflow
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L7/00—Suction cleaners adapted for additional purposes; Tables with suction openings for cleaning purposes; Containers for cleaning articles by suction; Suction cleaners adapted to cleaning of brushes; Suction cleaners adapted to taking-up liquids
- A47L7/0004—Suction cleaners adapted to take up liquids, e.g. wet or dry vacuum cleaners
- A47L7/0023—Recovery tanks
- A47L7/0038—Recovery tanks with means for emptying the tanks
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L7/00—Suction cleaners adapted for additional purposes; Tables with suction openings for cleaning purposes; Containers for cleaning articles by suction; Suction cleaners adapted to cleaning of brushes; Suction cleaners adapted to taking-up liquids
- A47L7/0004—Suction cleaners adapted to take up liquids, e.g. wet or dry vacuum cleaners
- A47L7/0042—Gaskets; Sealing means
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cleaning By Liquid Or Steam (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A vacuum cleaning machine for extracting wet/dry material from a surface to be cleaned, such as a carpet.
The machine has a housing with a removable container located therein. A suction conduit having a suction head is provided to extract the wet/dry material from the surface to be cleaned. A cover is provided above the container and has an open bottom, a peripheral sealing edge, and an enclosed wall above the sealing edge. A
suction head extends through the peripheral sealing edge. An inlet passage is provided within the enclosed wall and defines an inlet end and an outlet end. A
suction port is connected to a suction motor and is directed at the outlet end and spaced below the enclosed wall for sucking the liquid cleaning solution into the inlet passage. The outlet end is directed to release the solution at the enclosed wall away from the suction port for collecting the solution in the container.
A vacuum cleaning machine for extracting wet/dry material from a surface to be cleaned, such as a carpet.
The machine has a housing with a removable container located therein. A suction conduit having a suction head is provided to extract the wet/dry material from the surface to be cleaned. A cover is provided above the container and has an open bottom, a peripheral sealing edge, and an enclosed wall above the sealing edge. A
suction head extends through the peripheral sealing edge. An inlet passage is provided within the enclosed wall and defines an inlet end and an outlet end. A
suction port is connected to a suction motor and is directed at the outlet end and spaced below the enclosed wall for sucking the liquid cleaning solution into the inlet passage. The outlet end is directed to release the solution at the enclosed wall away from the suction port for collecting the solution in the container.
Description
~l~.3~
B~CKGROUND OF T~ INVENTION
(a) Field of the Invention The present invention relates to an improved vacuum cleaning machine of the wet/dry extraction type wherein the container and cover are removable and seamed to each other by suction from a source exteriorly thereof.
More paxticularly, the invention relates to a machine wherein the container for receiving the solution and dirt is removably contained within a housing and wherein a cover, including a suction port, is removably secured over the container and through which the extracted solution passes before entering the bucket. The bucket is free of outside pressure or of connections therein to a ~ -vacuum source.
(b) Description of Prior Art Of the devices known of the aforementioned type, such as that disclosed in U.S~ Patent No. 3,821,~30 issued on July 2, 1974, the extracted liquid solution and dirt enters a cover compartment above a container and is directed downwardly into the container. A dis-advantage of this type of device is that because the solution contains a detergent chemical, the splashing action of the solution falling into the container, or bucket, causes a foam head to build up on the upper sur-face of the liquid contained in the container and as this ~ ;
foam head rises, it spills out of the container and enters the suction ports or pipes leading to the vacuum motor, causing deterioration thereof.
A further disadvantage is that the covers for such machines are usually transparent, or at least a -portion of a cover adjacent the container is transparent, whereby to visually inspect the level of liquid within the container. As the foam builds up in the container, some of the suds will deposit on the transparent wall and hinder the transparency thereof. Still further, because these liquids are warm liquids and the outside wall of the container is subject to ambient eooler tem-perature, the temperature differential on the transparent portion of the cover causes fogging on the transparent portion and thus further hindering the visibility~
Furthermore, because foam builds up on the top surface of the liquid within the container, it is diffi-cult to ascertain the exact quantity of liquid within the container. There is no mechanism in the prior art, other than the visual mechanism, to indicate the amount of liquid within the container. Furthermore, in known machines, where the container is removable, the vacuum is usually applied along the outside wall of the container in a vacuum housing. Accordingly, the walls of the vacuum housing are continuously under stress by the force of the vacuum and also by an outside force exerted on the wall by cleaning solution contained within a reservoir formed about such wall. Other known removable type con-tainers have pipes formed therewith and extending from their bottom wall to connect to a suction sourceO Such ;;
pipes are a hindrance when emptying the container as they stick out and are subject to damage. Because of the suc-tion in the pipe,liquid from the container will be sucked into the vacuum motor through small cracks in the pipe.
Also, a vacuum connection must be made under the bucket and this added to the height of the machine makes it bulky and difficult to transport in automobiles, for example.
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Furthermore, the vacuum pipe prevents the provision of a handle inside the bucket container. Also, such containers are expensive to construct and require special seals. -SUMMARY OF INVENTION
It is a feature of the present invention to ~ ;
provide an improved cleaning mac'nine which substantially overcomes all of the above-mentioned disadvantages. ~ , A further feature of the present invention is ;
to provide a cleaning machine having a novel cover construction and wherein the cover continuously remains transparent for visual inspection of the removable ;
container positioned thereunder and wherein the formation `-of foam in the solution within the container is substan- ' tially reduced. ;`~-~
A further feature of the present invention is to provide an improved cleaning machine construction :~ , ~ wherein the vacuum is taken directly from the inside of ~ ;~
.:
the cover and wherein the inside of the removable container 20 ~ is sealed wlth the inside of the cover to form a vacuum chamber and any stress caused by the vacuum is applied ~. ~
to the removable parts of the machine, and namely, the insidé walls of the cover and~container. An assembly is also provided to ascertain the proper level of sulution ~;
within the container to prevent overflow.
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According to the above features, from a broad aspect, the present invention provides a vacuum c:Leaning device for extracting wet/dry material from a surface comprising a transportable container having an open end portion for disposal within which said material is collected, said container further comprising an open - ended one-piece container having solid walls free of any passageways; a removable cover having a vacuum port formed therein for securement to said open end portion of said container, suction means located exteriorly of :~
said cover and container and connected to said vacuum port whereby a vacuum is applied inside said cover and container' said cover further comprising an open hottom .
portion, a peripheral sealing edge to establish a seal about said container open end portion, and an enclosed :
wall above said open bottom portion' inlet tube formed : in said enclosed wall and including an inlet end and an ~ outlet end and convection means connected to said inlet :
: end; whereby said wet/dry material can be directed to :
said container by said convection means when vacuum is : applied to said vacuum~port,;said container being indepen-dent from said cover so as to receive vacuum and said ~.
material without specific orientation of its walls. ~ :
~; : : According to a further broad aspect of the ~ .present inventlon,~ there is provlded a vscuum aleanlng machine of the:liquid extraction type utilizing a liquid cleaning solutlon~comprlsi.ng: means for extracting said solution~by~suction from a surface; a~removable . -~:~
container connected to said extracti:ng means for ~::30: : collection of said solution for disposal, said container .`~
comprising::an~open ended one-piece container having solid : : . :
~ walls free of any passageways, said~machine further `~
.
. : ~ ~ ~ : . .
:
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. ~ , comprising: a ~ousing within which said container is disposed, a removable cover hav.ing a vacuum port formed therein mounted on said housing positioned above :
said container, said cover further comprising an open bottom portion, a peripheral sealing edge to establish a seal about said open end of said container, and an enclosed wall above said open bottom portion, suction means located exteriorly of said cover and container whereby a vacuum is applied inside said cover and container and connected to said vacuum port' inlet tube formed in said enclosed wall and including an inlet end and an outlet end, said vacuum port drawing said solution by suction within said inlet passage so as to direct said solution in said contai.ner, said .
container being independent from said cover so as to ~-.
receive vacuum and said material without specific orientation of its walls.
BRIEF DESCRIPTION OF DRAWINGS .
Various other objects, features and attendant :~
~: 20 advantages of the present invention will be more fully appreciated as the~same becomes better understood from :~
the following detailed description when considered in ~: connection with the accompanying drawings in which like : :,.::
reference characters designate like or corresponding parts ;~
; 2~5 ~ through~the several views and wherein~
FIGURE 1 is a perspective view of the cleaning ;`~
machine houslng, ~.
FIGURE 2 lS a perspective~top vlew of the machlne housing with the cover removed;
~;~;3~0 ~ ~FIGURE 3~is a sectlonal side view, partly : :
:: fra~gmented, of:the housing~
FIGURE 4 is a partly fragmented~section view ~: `; -.
. .::
- 6 ~
-~ ~ 7 -~3,~
showing the construction and location of the cover and the removable container for collecting the cleaning solution, FIGURE 5 is a top view of the cover; and FIGURE 6 is a fragmented side view of an embodiment ;
of the shut-off valve for the vacuum port.
. ~
DESCRIPTION OF PREFERRED EMBODIMæNTS
Referring now to the drawings, and more particularly to Figures 1 to 4, there is shown generally at 10, the cleaning machine housing of the present invention for cleaning surfaces, such as floor suxfaces having carpets, etc. The machine includes essentially a portable housing 11 displaceable on casters 9 and having handle bars 14.
A vacuum source 8 is provided in the housing 11 and a cleaning solution 17 is placed in a storage chamber 16.
The liquid cleaning solution 17 is sprayed on a surface ~m to be cleaned and extracted therefrom by~a liquid ex-tracting tool (not shown). The tool is connected to the housing 11 by means of a flexible conduit or hose ~20 (not shown) having a vacuum therein to suck the solid dirt or ;~ liquld having diss~olved dirt from the carpet. The liquid solution acts as a carrier for the;dirt. The liquid sol-ution 17 contained within the machine housing is a hot water and detergent solution. Spray nozzles (not shown) 25~ are provided in the head of the tool and connected by conduit~12 to a~pump 13 for pumping the solution. The solution is~sprayed into the surface to be cleaned im~
medlately before the vacuum is applied to the carpet whereby the solution has a chance to penetrate down into ~30 ~ ~ the pile of the carpet to the backing to dissolve dirt contained therein.
~ -- :., ~ The housing 11 is formed of a rigid industrial plastic `~
. ~
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material or any other suitable material and defines there-in the storage chamber 16 for containing the hot cleaning solution 17. The vacuum motor 8 is mounted within the ;
housing 11 to provide the suction force connected by the hose to the extracting tool.
A container 19 is mounted within the housing 11 and is provided with a cover 20 and a bottom wall l9a.
As shown in this particular embodiment, the container is a removable pail having a handle 21 hinged on the inside wall thereof. There are no holes or conduits in the con-tainer to develop leaks.
As shown in Figures 2 and 3, the housing has a ~ -container cavity 22 defined in a top wall 23 thereof.
The cavity has a bottom wall 24, a continuous side wall 25, and an open top end. The container 19 is seated on the bottom wall 24 which is the bottom wall of housing 11.
Thus, the housing height can be maintained to a minimum.
The top wall~about the cavity 22 defines a seating wall 26 to receive the cover thereon. A vacuum connecting port 27 is provided in the seating wall 26 and connects to the :`
: ,:
~ vacuum source via a vacuum conduit 28 (See Figures 2 and 4). ~ ~
. . .
~ A peripheral recess 29 is formed on the top wall , ~ ", :
23 circumferentlally about the cavity 22. This recess is formed to receive a transverse circumferential shoulder 30 which is provided along the top circumferential edge -~
of the contalner whereby the top~of the~container is ,', terminated flush with the top wall 23 of the housing. , Thus, the removable container or pail 19 is snugly fitted within the cavlty 22. As shown ln Flgure 4, at least ;
one orifice 31 may be provided in the side wall 25 of the cavity~to communicate with outsi~e atmosphere whereby ~`
no suction force will be applied in the extracting ~) '`
3~
tool if the pail l9 is not in position within the cavity ~-22 When the pail is in position, this orifice is sub-stantially obstructed from communication with the vacuum port 27, as will be evident later when describing the construction o~ the cover, Referring now more particularly to Figures 2, 4 , and 5, there is shown the construction of the cover which is removably positionable above the container l9 and loc~
atable on the seating wall 26 by means of a peripheral flange 32 formed about the seating wall 26. The cover 20 consists of a transparent upper portion 33 e*tending above a peripheral sealing edge 34. A cylindrical flange 35 depends from the peripheral sealing edge 34 and ter-minates in an open bottom 36. As shown in Figure 4, when the cover is positioned above the container, the cylindrical flange 35 enters a top portion of the container l9. Also, -~
the peripheral sealing edge 34 is provided with a cushion-ing material 37 on the underside thereof whereby the mater1al wil1 compress when suction is applied within the -~
20 ~ inside of the cover and the container l9 to make a sub~
stantial hermetic seal in the joint between the cover and the seating wall 26 of the housing. The orifice 31 in `
the side wall 25~o~ the cavity 22 is substantially sealed from~the inside of the container 19 when a vacuum is 25~ ~ applied therewithin by the`cushioning materiaI 37. The -~
; pressure of the~cover is applied on the top wall of the housing and~not on the periphery of the container. ~`
The t~ransparent upper portion 33 of the cover 20~ consists~of~an enc~losed wall wh1ch is~a dome-shaped wall 38 consisting of a first wall section 39 extending upwardly and inclined~inwardly and merging integral with a top wall or surface 40 hav1ng a ra1sed spherica1 central portion 41.
~ :-g _ IL~L ;~r59~1(3 , As can be seen, an inlet passage, herein an inlet tube 45, is secured inside the transparent upper portion of the cover and defines an inlet end 46 in commu~
nication with outside at~osphere. The inlet end is the ~, S inlet of the tube 45 and this tube has a right angle bend therein whereby the outlet end 47 of the tube is connected substantially centrally to the underface of the spherical central portion 41. At least one opening 48, two being shown in Figure 5, is provided in the outlet end 47 and this is where the liquid cleaning solution enters the cover and is directed to the container 19 when the machine is in operation. The small hole 69 in the tube 45 is a drain hole when there is no vacuum to drain any solution from the tube.
As shown more clearly in Figures 4 and 5, the peripheral sealing edge 34 extends under the transparent ~, upper portion and terminates in the cylindrical flange 35.
A suction conduit or vacuum port 50 is provided on the peripheral edge 34 inwardly of the housing and has a i 20 suction tube 51~extending into the cover and spaced from the walls thereof and~posltioned angularly upwards whereby ~'~
the inlet suction end~S2 thereof polnts at the openings 48 of the inlet tube 45. A hole 53 ia provlded in the peripheral sealing edge 34 under the suction conduit 50 ,~
and positioned for registry with the vacuum connecting ~-port 27 ln the seating~wall 26.
As can be~seen more clearly in Figures 4 and 5, the outlet~ end 47 of the tube 45 lS provided wlth a vacuum protection wall 54 which is positioned intermediate the ~ ;
30~ outlet;end and the~ inlet suctlon end 52 to shield the ~ ~-inlet suction end;~from the outlet openings 48. With the :
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cover in po9ition over the container 19, and with the vacuum source energized, a suction force will be created inside the cover and container through the inlet suction end 52. This suction force will then be applied inside the inlet tube 45 through the openings 48 and cause a suction within the flexible conduit 13 connected to the inlet end 46 of the tube 45. This suction will then suck up the liquid cleaning solution and the dirt dis- -solved therein and direct it within the container 19 via .
the inlet tube 45. As the liquid enters the inlet tube 45, it is directed upwardly to the openings 48 and re-leased at high velocity at the top wall 40 of the cover 20. Because of the vacuum within the area under the ~-~
; cover, the solution flows along the surface of the top wall 40 and flows downwardly by gravity into the container ~;
19 as it is guided down by the cylindrical flange 35.
~: Because the inlet suction end 52 is positioned away from ~
, . . .
the top wall 40, no liquid solution or any suds are sucXed :~
into the vacuum inlet end.
An advantage obtained by releasing the solution upwardly towards the top wall of the cover, is that the .
solution will maintain the cover visible during operation :~
by preventing fogg1ng of the transparent~upper portion 33 and partlcularly the spherical central portion 41 whereby to permit visual lnspection of the level of liquid within the container l9.~; Furthermore, another advantage obtained by releasing;the~solution at the top wall 40~is that : :liquld is not directed at the surface 60 of the collected `:~
solutlon;61 withln~the container~l9:to cause excessive ~30 foaming~on the top~surface 60 as the solution does contain : a;detergent additive. Furthermore, as shown in Figure 4, :;
the vacuum is applied:directly to the suction end 52 within ''` `
,~ tl'~r~ ' , the cover, ln close proximity to the openings 48 of the inlet tube 45, and thus, no stress is ffpplied on the structural wall 62 of the housing but only on removable ~
parts. An advantage of eliminating stress from this wall ~ , is that there already exists a pressure on the outside surface of the wall by the cleaning solution 17 contained within the storage chamber 16 of the housing 11. A ~ ~-further suction on the inside surface would further weaken the wall 62 as it would be constantly under stresses from the suction on one side and the pressure on the other side extending in the same direction.
Referring now to Figure 6, there is shown an important feature of the vacuum system whereby a shut-off valve 70 may be provided to cut-off the vacuum at the inlet suction end 52 when a predetermined quantity defined by level 75, of solution 61 has been collected in the container 19. As herein shown, the shut-off valve 70 consists of a rubber-like gasket or top wall or surface 71 seamed to the inside surface 35' of the flange 35 of the covfer and in ~20 alignment below~the suction conduit 50 by an attachment portion 74. A float 72 is secured to a top wall portion 73 , f of the gasket 71. As the level of~solution 61 raises to the predetermined;level 75 within the container 19, the -:
suction at the end 52 will draw the top wall portion 73 of '-the gaske~t thereagainst to obstruct the orifice therein, thus cutting off the vacuum from the interlor of the -container and cover.
~ ~ : , - .
~ The shut-off valve above described if5 economical ; ~
: : . : ~ .-: .
and simple in construction and is only but one example of ~;~ 30~ how a~predetermined level of solution in the container "
could be sensed. Other mechanisms may be provided such as floats which may be secured on the inside wall of the container 19 and whlch may be connected to activate a ~.
1 2 r .
~L3~ 3 switch which would cut-off the vacuum source 8 to shut-off the vacuum. Alternatively, the floats or sensor could simply cause a visual or audible alarm to function indic~
ating to the operator that the machine should be stopped and the container emptied. of course, with this type of sensing device, there is no need to have the cover made of transparent material. However, there is still the need of preventing foam frorn building up inside the container due to the disadvantages previously described and part-icularly causing the foam to be sucked into the vacuum source.
It can be seen that with the novel cover con- ;
struction and its cooperation with a removable container positioned thereunder, there is provided a new method of extracting cleaning solution from a surface to be ~`
cleaned, such as a carpet. The method can be summarized as consisting of subjecting the solution to a suction to channel the flow of solution carrier and dirt against ;`~
~ the wall of a cover positioned over an open end of the `~ 20 container in sealing engagement thereabout. The cover and ;~ the container form a vacuum chamber when air is extracted therefrom from a port shielded from the solution sucked . .
in. Air is extracted from within the cover by the suction ~
,.
port which is spaced from the wall of the cover and the `~
solution is directed to the container as it flows along the walls of the cover.
As previously mentioned, the device of this in-vention may be modified to be accepted for wet/dry cleaning ~ ;-, ; and the essential parts thereof are the cover and container.
The vacuum source could be a vacuum cleaning machine con-~;~ nected to the cover by means of its suction hose. The container and cover are secured together by suction applied within the cover and the container is full of holes or pipes. Also, the cover does not have any motor connected thereto and extending within the container.
Obviously, numerous additional modifications and variations of the present invention are possible in ~`
light of the above teachings. It is therefore to be ;
nderstood that within the scope of the appended claims, the invention may be practicecl otherwise than as ;~
specifically described herein. `
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:
B~CKGROUND OF T~ INVENTION
(a) Field of the Invention The present invention relates to an improved vacuum cleaning machine of the wet/dry extraction type wherein the container and cover are removable and seamed to each other by suction from a source exteriorly thereof.
More paxticularly, the invention relates to a machine wherein the container for receiving the solution and dirt is removably contained within a housing and wherein a cover, including a suction port, is removably secured over the container and through which the extracted solution passes before entering the bucket. The bucket is free of outside pressure or of connections therein to a ~ -vacuum source.
(b) Description of Prior Art Of the devices known of the aforementioned type, such as that disclosed in U.S~ Patent No. 3,821,~30 issued on July 2, 1974, the extracted liquid solution and dirt enters a cover compartment above a container and is directed downwardly into the container. A dis-advantage of this type of device is that because the solution contains a detergent chemical, the splashing action of the solution falling into the container, or bucket, causes a foam head to build up on the upper sur-face of the liquid contained in the container and as this ~ ;
foam head rises, it spills out of the container and enters the suction ports or pipes leading to the vacuum motor, causing deterioration thereof.
A further disadvantage is that the covers for such machines are usually transparent, or at least a -portion of a cover adjacent the container is transparent, whereby to visually inspect the level of liquid within the container. As the foam builds up in the container, some of the suds will deposit on the transparent wall and hinder the transparency thereof. Still further, because these liquids are warm liquids and the outside wall of the container is subject to ambient eooler tem-perature, the temperature differential on the transparent portion of the cover causes fogging on the transparent portion and thus further hindering the visibility~
Furthermore, because foam builds up on the top surface of the liquid within the container, it is diffi-cult to ascertain the exact quantity of liquid within the container. There is no mechanism in the prior art, other than the visual mechanism, to indicate the amount of liquid within the container. Furthermore, in known machines, where the container is removable, the vacuum is usually applied along the outside wall of the container in a vacuum housing. Accordingly, the walls of the vacuum housing are continuously under stress by the force of the vacuum and also by an outside force exerted on the wall by cleaning solution contained within a reservoir formed about such wall. Other known removable type con-tainers have pipes formed therewith and extending from their bottom wall to connect to a suction sourceO Such ;;
pipes are a hindrance when emptying the container as they stick out and are subject to damage. Because of the suc-tion in the pipe,liquid from the container will be sucked into the vacuum motor through small cracks in the pipe.
Also, a vacuum connection must be made under the bucket and this added to the height of the machine makes it bulky and difficult to transport in automobiles, for example.
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Furthermore, the vacuum pipe prevents the provision of a handle inside the bucket container. Also, such containers are expensive to construct and require special seals. -SUMMARY OF INVENTION
It is a feature of the present invention to ~ ;
provide an improved cleaning mac'nine which substantially overcomes all of the above-mentioned disadvantages. ~ , A further feature of the present invention is ;
to provide a cleaning machine having a novel cover construction and wherein the cover continuously remains transparent for visual inspection of the removable ;
container positioned thereunder and wherein the formation `-of foam in the solution within the container is substan- ' tially reduced. ;`~-~
A further feature of the present invention is to provide an improved cleaning machine construction :~ , ~ wherein the vacuum is taken directly from the inside of ~ ;~
.:
the cover and wherein the inside of the removable container 20 ~ is sealed wlth the inside of the cover to form a vacuum chamber and any stress caused by the vacuum is applied ~. ~
to the removable parts of the machine, and namely, the insidé walls of the cover and~container. An assembly is also provided to ascertain the proper level of sulution ~;
within the container to prevent overflow.
,~ ~ ~ '' .,.' ' :'.:
~: '',' ~ 4 ::
1 31 1~.3rS ~ 3L~
According to the above features, from a broad aspect, the present invention provides a vacuum c:Leaning device for extracting wet/dry material from a surface comprising a transportable container having an open end portion for disposal within which said material is collected, said container further comprising an open - ended one-piece container having solid walls free of any passageways; a removable cover having a vacuum port formed therein for securement to said open end portion of said container, suction means located exteriorly of :~
said cover and container and connected to said vacuum port whereby a vacuum is applied inside said cover and container' said cover further comprising an open hottom .
portion, a peripheral sealing edge to establish a seal about said container open end portion, and an enclosed :
wall above said open bottom portion' inlet tube formed : in said enclosed wall and including an inlet end and an ~ outlet end and convection means connected to said inlet :
: end; whereby said wet/dry material can be directed to :
said container by said convection means when vacuum is : applied to said vacuum~port,;said container being indepen-dent from said cover so as to receive vacuum and said ~.
material without specific orientation of its walls. ~ :
~; : : According to a further broad aspect of the ~ .present inventlon,~ there is provlded a vscuum aleanlng machine of the:liquid extraction type utilizing a liquid cleaning solutlon~comprlsi.ng: means for extracting said solution~by~suction from a surface; a~removable . -~:~
container connected to said extracti:ng means for ~::30: : collection of said solution for disposal, said container .`~
comprising::an~open ended one-piece container having solid : : . :
~ walls free of any passageways, said~machine further `~
.
. : ~ ~ ~ : . .
:
3~.3,S~
. ~ , comprising: a ~ousing within which said container is disposed, a removable cover hav.ing a vacuum port formed therein mounted on said housing positioned above :
said container, said cover further comprising an open bottom portion, a peripheral sealing edge to establish a seal about said open end of said container, and an enclosed wall above said open bottom portion, suction means located exteriorly of said cover and container whereby a vacuum is applied inside said cover and container and connected to said vacuum port' inlet tube formed in said enclosed wall and including an inlet end and an outlet end, said vacuum port drawing said solution by suction within said inlet passage so as to direct said solution in said contai.ner, said .
container being independent from said cover so as to ~-.
receive vacuum and said material without specific orientation of its walls.
BRIEF DESCRIPTION OF DRAWINGS .
Various other objects, features and attendant :~
~: 20 advantages of the present invention will be more fully appreciated as the~same becomes better understood from :~
the following detailed description when considered in ~: connection with the accompanying drawings in which like : :,.::
reference characters designate like or corresponding parts ;~
; 2~5 ~ through~the several views and wherein~
FIGURE 1 is a perspective view of the cleaning ;`~
machine houslng, ~.
FIGURE 2 lS a perspective~top vlew of the machlne housing with the cover removed;
~;~;3~0 ~ ~FIGURE 3~is a sectlonal side view, partly : :
:: fra~gmented, of:the housing~
FIGURE 4 is a partly fragmented~section view ~: `; -.
. .::
- 6 ~
-~ ~ 7 -~3,~
showing the construction and location of the cover and the removable container for collecting the cleaning solution, FIGURE 5 is a top view of the cover; and FIGURE 6 is a fragmented side view of an embodiment ;
of the shut-off valve for the vacuum port.
. ~
DESCRIPTION OF PREFERRED EMBODIMæNTS
Referring now to the drawings, and more particularly to Figures 1 to 4, there is shown generally at 10, the cleaning machine housing of the present invention for cleaning surfaces, such as floor suxfaces having carpets, etc. The machine includes essentially a portable housing 11 displaceable on casters 9 and having handle bars 14.
A vacuum source 8 is provided in the housing 11 and a cleaning solution 17 is placed in a storage chamber 16.
The liquid cleaning solution 17 is sprayed on a surface ~m to be cleaned and extracted therefrom by~a liquid ex-tracting tool (not shown). The tool is connected to the housing 11 by means of a flexible conduit or hose ~20 (not shown) having a vacuum therein to suck the solid dirt or ;~ liquld having diss~olved dirt from the carpet. The liquid solution acts as a carrier for the;dirt. The liquid sol-ution 17 contained within the machine housing is a hot water and detergent solution. Spray nozzles (not shown) 25~ are provided in the head of the tool and connected by conduit~12 to a~pump 13 for pumping the solution. The solution is~sprayed into the surface to be cleaned im~
medlately before the vacuum is applied to the carpet whereby the solution has a chance to penetrate down into ~30 ~ ~ the pile of the carpet to the backing to dissolve dirt contained therein.
~ -- :., ~ The housing 11 is formed of a rigid industrial plastic `~
. ~
~`~5 ' ~L~3,S~
material or any other suitable material and defines there-in the storage chamber 16 for containing the hot cleaning solution 17. The vacuum motor 8 is mounted within the ;
housing 11 to provide the suction force connected by the hose to the extracting tool.
A container 19 is mounted within the housing 11 and is provided with a cover 20 and a bottom wall l9a.
As shown in this particular embodiment, the container is a removable pail having a handle 21 hinged on the inside wall thereof. There are no holes or conduits in the con-tainer to develop leaks.
As shown in Figures 2 and 3, the housing has a ~ -container cavity 22 defined in a top wall 23 thereof.
The cavity has a bottom wall 24, a continuous side wall 25, and an open top end. The container 19 is seated on the bottom wall 24 which is the bottom wall of housing 11.
Thus, the housing height can be maintained to a minimum.
The top wall~about the cavity 22 defines a seating wall 26 to receive the cover thereon. A vacuum connecting port 27 is provided in the seating wall 26 and connects to the :`
: ,:
~ vacuum source via a vacuum conduit 28 (See Figures 2 and 4). ~ ~
. . .
~ A peripheral recess 29 is formed on the top wall , ~ ", :
23 circumferentlally about the cavity 22. This recess is formed to receive a transverse circumferential shoulder 30 which is provided along the top circumferential edge -~
of the contalner whereby the top~of the~container is ,', terminated flush with the top wall 23 of the housing. , Thus, the removable container or pail 19 is snugly fitted within the cavlty 22. As shown ln Flgure 4, at least ;
one orifice 31 may be provided in the side wall 25 of the cavity~to communicate with outsi~e atmosphere whereby ~`
no suction force will be applied in the extracting ~) '`
3~
tool if the pail l9 is not in position within the cavity ~-22 When the pail is in position, this orifice is sub-stantially obstructed from communication with the vacuum port 27, as will be evident later when describing the construction o~ the cover, Referring now more particularly to Figures 2, 4 , and 5, there is shown the construction of the cover which is removably positionable above the container l9 and loc~
atable on the seating wall 26 by means of a peripheral flange 32 formed about the seating wall 26. The cover 20 consists of a transparent upper portion 33 e*tending above a peripheral sealing edge 34. A cylindrical flange 35 depends from the peripheral sealing edge 34 and ter-minates in an open bottom 36. As shown in Figure 4, when the cover is positioned above the container, the cylindrical flange 35 enters a top portion of the container l9. Also, -~
the peripheral sealing edge 34 is provided with a cushion-ing material 37 on the underside thereof whereby the mater1al wil1 compress when suction is applied within the -~
20 ~ inside of the cover and the container l9 to make a sub~
stantial hermetic seal in the joint between the cover and the seating wall 26 of the housing. The orifice 31 in `
the side wall 25~o~ the cavity 22 is substantially sealed from~the inside of the container 19 when a vacuum is 25~ ~ applied therewithin by the`cushioning materiaI 37. The -~
; pressure of the~cover is applied on the top wall of the housing and~not on the periphery of the container. ~`
The t~ransparent upper portion 33 of the cover 20~ consists~of~an enc~losed wall wh1ch is~a dome-shaped wall 38 consisting of a first wall section 39 extending upwardly and inclined~inwardly and merging integral with a top wall or surface 40 hav1ng a ra1sed spherica1 central portion 41.
~ :-g _ IL~L ;~r59~1(3 , As can be seen, an inlet passage, herein an inlet tube 45, is secured inside the transparent upper portion of the cover and defines an inlet end 46 in commu~
nication with outside at~osphere. The inlet end is the ~, S inlet of the tube 45 and this tube has a right angle bend therein whereby the outlet end 47 of the tube is connected substantially centrally to the underface of the spherical central portion 41. At least one opening 48, two being shown in Figure 5, is provided in the outlet end 47 and this is where the liquid cleaning solution enters the cover and is directed to the container 19 when the machine is in operation. The small hole 69 in the tube 45 is a drain hole when there is no vacuum to drain any solution from the tube.
As shown more clearly in Figures 4 and 5, the peripheral sealing edge 34 extends under the transparent ~, upper portion and terminates in the cylindrical flange 35.
A suction conduit or vacuum port 50 is provided on the peripheral edge 34 inwardly of the housing and has a i 20 suction tube 51~extending into the cover and spaced from the walls thereof and~posltioned angularly upwards whereby ~'~
the inlet suction end~S2 thereof polnts at the openings 48 of the inlet tube 45. A hole 53 ia provlded in the peripheral sealing edge 34 under the suction conduit 50 ,~
and positioned for registry with the vacuum connecting ~-port 27 ln the seating~wall 26.
As can be~seen more clearly in Figures 4 and 5, the outlet~ end 47 of the tube 45 lS provided wlth a vacuum protection wall 54 which is positioned intermediate the ~ ;
30~ outlet;end and the~ inlet suctlon end 52 to shield the ~ ~-inlet suction end;~from the outlet openings 48. With the :
~ ;: ' ':
~L~3,~
cover in po9ition over the container 19, and with the vacuum source energized, a suction force will be created inside the cover and container through the inlet suction end 52. This suction force will then be applied inside the inlet tube 45 through the openings 48 and cause a suction within the flexible conduit 13 connected to the inlet end 46 of the tube 45. This suction will then suck up the liquid cleaning solution and the dirt dis- -solved therein and direct it within the container 19 via .
the inlet tube 45. As the liquid enters the inlet tube 45, it is directed upwardly to the openings 48 and re-leased at high velocity at the top wall 40 of the cover 20. Because of the vacuum within the area under the ~-~
; cover, the solution flows along the surface of the top wall 40 and flows downwardly by gravity into the container ~;
19 as it is guided down by the cylindrical flange 35.
~: Because the inlet suction end 52 is positioned away from ~
, . . .
the top wall 40, no liquid solution or any suds are sucXed :~
into the vacuum inlet end.
An advantage obtained by releasing the solution upwardly towards the top wall of the cover, is that the .
solution will maintain the cover visible during operation :~
by preventing fogg1ng of the transparent~upper portion 33 and partlcularly the spherical central portion 41 whereby to permit visual lnspection of the level of liquid within the container l9.~; Furthermore, another advantage obtained by releasing;the~solution at the top wall 40~is that : :liquld is not directed at the surface 60 of the collected `:~
solutlon;61 withln~the container~l9:to cause excessive ~30 foaming~on the top~surface 60 as the solution does contain : a;detergent additive. Furthermore, as shown in Figure 4, :;
the vacuum is applied:directly to the suction end 52 within ''` `
,~ tl'~r~ ' , the cover, ln close proximity to the openings 48 of the inlet tube 45, and thus, no stress is ffpplied on the structural wall 62 of the housing but only on removable ~
parts. An advantage of eliminating stress from this wall ~ , is that there already exists a pressure on the outside surface of the wall by the cleaning solution 17 contained within the storage chamber 16 of the housing 11. A ~ ~-further suction on the inside surface would further weaken the wall 62 as it would be constantly under stresses from the suction on one side and the pressure on the other side extending in the same direction.
Referring now to Figure 6, there is shown an important feature of the vacuum system whereby a shut-off valve 70 may be provided to cut-off the vacuum at the inlet suction end 52 when a predetermined quantity defined by level 75, of solution 61 has been collected in the container 19. As herein shown, the shut-off valve 70 consists of a rubber-like gasket or top wall or surface 71 seamed to the inside surface 35' of the flange 35 of the covfer and in ~20 alignment below~the suction conduit 50 by an attachment portion 74. A float 72 is secured to a top wall portion 73 , f of the gasket 71. As the level of~solution 61 raises to the predetermined;level 75 within the container 19, the -:
suction at the end 52 will draw the top wall portion 73 of '-the gaske~t thereagainst to obstruct the orifice therein, thus cutting off the vacuum from the interlor of the -container and cover.
~ ~ : , - .
~ The shut-off valve above described if5 economical ; ~
: : . : ~ .-: .
and simple in construction and is only but one example of ~;~ 30~ how a~predetermined level of solution in the container "
could be sensed. Other mechanisms may be provided such as floats which may be secured on the inside wall of the container 19 and whlch may be connected to activate a ~.
1 2 r .
~L3~ 3 switch which would cut-off the vacuum source 8 to shut-off the vacuum. Alternatively, the floats or sensor could simply cause a visual or audible alarm to function indic~
ating to the operator that the machine should be stopped and the container emptied. of course, with this type of sensing device, there is no need to have the cover made of transparent material. However, there is still the need of preventing foam frorn building up inside the container due to the disadvantages previously described and part-icularly causing the foam to be sucked into the vacuum source.
It can be seen that with the novel cover con- ;
struction and its cooperation with a removable container positioned thereunder, there is provided a new method of extracting cleaning solution from a surface to be ~`
cleaned, such as a carpet. The method can be summarized as consisting of subjecting the solution to a suction to channel the flow of solution carrier and dirt against ;`~
~ the wall of a cover positioned over an open end of the `~ 20 container in sealing engagement thereabout. The cover and ;~ the container form a vacuum chamber when air is extracted therefrom from a port shielded from the solution sucked . .
in. Air is extracted from within the cover by the suction ~
,.
port which is spaced from the wall of the cover and the `~
solution is directed to the container as it flows along the walls of the cover.
As previously mentioned, the device of this in-vention may be modified to be accepted for wet/dry cleaning ~ ;-, ; and the essential parts thereof are the cover and container.
The vacuum source could be a vacuum cleaning machine con-~;~ nected to the cover by means of its suction hose. The container and cover are secured together by suction applied within the cover and the container is full of holes or pipes. Also, the cover does not have any motor connected thereto and extending within the container.
Obviously, numerous additional modifications and variations of the present invention are possible in ~`
light of the above teachings. It is therefore to be ;
nderstood that within the scope of the appended claims, the invention may be practicecl otherwise than as ;~
specifically described herein. `
''' ~ ,sll' :.
. . ,~, , . .
. :;,.
, : ~: , , :
: :,.
:
Claims (19)
1. A vacuum cleaning device for extracting wet/dry material from a surface comprising a transportable container having an open end portion for disposal within which said material is collected;
said container further comprising an open ended one-piece container having solid walls free of any passageways;
a removable cover having a vacuum port formed therein for securement to said open end portion of said container;
suction means located exteriorly of said cover and container and connected to said vacuum port whereby a vacuum is applied inside said cover and container;
said cover further comprising an open bottom portion, a peripheral sealing edge to establish a seal about said container open end portion, and an enclosed wall above said open bottom portion;
inlet tube formed in said enclosed wall and including an inlet end and an outlet end and convection means connected to said inlet end;
whereby said wet/dry material can be directed to said container by said convection means when vacuum is applied to said vacuum port, said container being indepen-dent from said cover so as to receive vacuum and said material without specific orientation of its walls.
said container further comprising an open ended one-piece container having solid walls free of any passageways;
a removable cover having a vacuum port formed therein for securement to said open end portion of said container;
suction means located exteriorly of said cover and container and connected to said vacuum port whereby a vacuum is applied inside said cover and container;
said cover further comprising an open bottom portion, a peripheral sealing edge to establish a seal about said container open end portion, and an enclosed wall above said open bottom portion;
inlet tube formed in said enclosed wall and including an inlet end and an outlet end and convection means connected to said inlet end;
whereby said wet/dry material can be directed to said container by said convection means when vacuum is applied to said vacuum port, said container being indepen-dent from said cover so as to receive vacuum and said material without specific orientation of its walls.
2. A device as claimed in claim 1, further comprising a housing wherein said container is removably held in said housing, said suction means comprising a vacuum motor located in said housing exteriorly of said container.
3. A device as claimed in claim 1, said suction means comprising a vacuum machine, said vacuum machine further comprising a hose connected to said vacuum port.
4. A device as claimed in claim 1, said suction means comprising a vacuum motor, and further comprising means for securing said vacuum motor exteriorly of said cover and container;
a vacuum conduit releasably engageable with said cover and connected to said vacuum motor whereby both said cover and container are removable by disconnecting said vacuum from said vacuum port.
a vacuum conduit releasably engageable with said cover and connected to said vacuum motor whereby both said cover and container are removable by disconnecting said vacuum from said vacuum port.
5. A vacuum cleaning machine of the liquid extrac-tion type utilizing a liquid cleaning solution comprising:
means for extracting said solution by suction from a surface;
a removable container connected to said extracting means for collection of said solution for disposal;
said container comprising an open ended one-piece container having solid walls free of any passageways;
said machine further comprising:
a housing within which said container is disposed;
a removable cover having a vacuum port formed therein mounted on said housing positioned above said container, said cover further comprising an open bottom portion, a peripheral sealing edge to establish a seal about said open end of said container, and an enclosed wall above said open bottom portion;
suction means located exteriorly of said cover and container whereby a vacuum is applied inside said cover and container and connected to said vacuum port;
inlet tube formed in said enclosed wall and including an inlet end and an outlet end, said vacuum port drawing said solution by suction within said inlet passage so as to direct said solution in said container, said container being independent from said cover so as to receive vacuum and said material without specific orientation of its walls.
means for extracting said solution by suction from a surface;
a removable container connected to said extracting means for collection of said solution for disposal;
said container comprising an open ended one-piece container having solid walls free of any passageways;
said machine further comprising:
a housing within which said container is disposed;
a removable cover having a vacuum port formed therein mounted on said housing positioned above said container, said cover further comprising an open bottom portion, a peripheral sealing edge to establish a seal about said open end of said container, and an enclosed wall above said open bottom portion;
suction means located exteriorly of said cover and container whereby a vacuum is applied inside said cover and container and connected to said vacuum port;
inlet tube formed in said enclosed wall and including an inlet end and an outlet end, said vacuum port drawing said solution by suction within said inlet passage so as to direct said solution in said container, said container being independent from said cover so as to receive vacuum and said material without specific orientation of its walls.
6. A machine as claimed in claim 5 wherein said outlet end is positioned so as to release said solution at said enclosed wall away from said vacuum port.
7. A machine as claimed in claim 6, said enclosed wall having a top surface portion wherein said inlet tube comprises means for connecting said outlet end to said top surface portion of said enclosed wall so as to direct said solution outwardly at said top surface portion.
8. A machine as claimed in claim 7, said tube further comprising a side wall and a top portion connected to said side wall wherein said outlet end of said tube extends vertically with respect to said top surface portion, said tube outlet end having formed therein at least one opening in said top portion of said side wall of said tube, and further comprising a vacuum protection wall portion connected to said top portion.
9. A machine as claimed in claim 8, said tube having a drain hole formed therein in a lowermost part of said side wall thereof.
10. A machine as claimed in claim 6 wherein said vacuum port comprises a suction tube extending into said cover and having an inlet suction end spaced away from said enclosed wall and extending upwardly toward said outlet end of said passage means.
11. A machine as claimed in claim 10 further comprising a vacuum protection wall positioned inter-mediate said outlet end of said inlet passage and said inlet suction end to shield said inlet suction end from said outlet end.
12. A machine as claimed in claim 6, further comprising a vacuum shut-off valve mounted on said cover for cutting off said vacuum at said vacuum port when a predetermined quantity of solution is present in said container.
13. A machine as claimed in claim 10 further comprising a vacuum shut-off valve for obstructing said inlet suction end when the level of solution within said container rises to a predetermined valve activating level.
14. A machine as claimed in claim 13 wherein said shut-off valve comprises a float, said float having a top surface formed of soft material, said top surface being displaced by suction at said inlet suction end when in proximity thereof to obstruct said inlet suction end.
15. A machine as claimed in claim 6, said container having a top portion wherein said removable container has a top circumferential edge, said cover further comprising a cylindrical flange depending from said peripheral sealing edge and terminating in said open bottom portion, said cylindrical flange extending within said top portion of said container.
16. A machine as claimed in claim 15, said housing having a top and bottom wall wherein said housing has a container cavity formed therein defined in said top wall thereof; said cavity extending to said bottom wall, said housing further comprising a continuous side wall and an open top end portion; said top wall defining a seating wall for said peripheral sealing edge of said cover, said seating wall having a vacuum connecting port, said vacuum port being connected to said vacuum connecting port when said cover is positioned on said seating wall, said con-tainer further comprising a bottom wall resting on said bottom wall of said housing.
17. A machine as claimed in claim 16, said top wall having a peripheral recess formed therein about said cavity, said container further comprising a transverse shoulder along said top circumferential edge, wherein said shoulder is positioned in said peripheral recess.
18. A machine as claimed in claim 7 wherein said enclosed wall comprises a dome-shaped wall having a first wall section extending upwardly and inclined inwardly and merging integral with a top wall, said top wall having a raised spherical central portion, wherein said outlet end of said tube is connected to a central position of said central portion.
19. A machine as claimed in claim 16, further comprising passage means to atmosphere mounted on said housing, said continuous side wall having an orifice formed therein, said passage means connecting with said orifice wherein said orifice is substantially obstructed from communication with said suction when said container is positioned in said cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000342428A CA1135910A (en) | 1979-12-20 | 1979-12-20 | Vacuum cleaning machine for extracting wet/dry material from a surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000342428A CA1135910A (en) | 1979-12-20 | 1979-12-20 | Vacuum cleaning machine for extracting wet/dry material from a surface |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1135910A true CA1135910A (en) | 1982-11-23 |
Family
ID=4115878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000342428A Expired CA1135910A (en) | 1979-12-20 | 1979-12-20 | Vacuum cleaning machine for extracting wet/dry material from a surface |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1135910A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0185310A2 (en) * | 1984-12-17 | 1986-06-25 | Tennant Company | Floor maintenance machine and method |
| EP0230262A2 (en) * | 1986-01-14 | 1987-07-29 | K.E.W. Industri A/S | A machine for cleaning carpets or the like, and a container for use with such a machine |
| WO2006104908A2 (en) * | 2005-03-25 | 2006-10-05 | S. C. Johnson & Son, Inc. | Soft-surface remediation device and method of using same |
-
1979
- 1979-12-20 CA CA000342428A patent/CA1135910A/en not_active Expired
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0185310A2 (en) * | 1984-12-17 | 1986-06-25 | Tennant Company | Floor maintenance machine and method |
| EP0185310A3 (en) * | 1984-12-17 | 1987-11-11 | Tennant Company | Floor maintenance machine and method |
| EP0230262A2 (en) * | 1986-01-14 | 1987-07-29 | K.E.W. Industri A/S | A machine for cleaning carpets or the like, and a container for use with such a machine |
| EP0230262A3 (en) * | 1986-01-14 | 1987-11-04 | K.E.W. Industri A/S | A machine for cleaning carpets or the like, and a container for use with such a machine |
| WO2006104908A2 (en) * | 2005-03-25 | 2006-10-05 | S. C. Johnson & Son, Inc. | Soft-surface remediation device and method of using same |
| WO2006104908A3 (en) * | 2005-03-25 | 2007-03-22 | Johnson & Son Inc S C | Soft-surface remediation device and method of using same |
| US7757340B2 (en) | 2005-03-25 | 2010-07-20 | S.C. Johnson & Son, Inc. | Soft-surface remediation device and method of using same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |