Abstract:
Disclosed is a method and two apparatuses enabling suction control over surface cleaning and scraping. Suction control is necessary so as to obtain good contact between a cleaning/scraping pad and the surface to be cleaned/scraped, thereby achieving efficiency. Also, suction control is required so as to collect debris falling off during the cleaning/scraping process, which may otherwise contaminate the environment. Suction control provides guidance for the movement of a cleaning/scraping pad sucked on the surface of an object. This implies convenience when cleaning/scraping over a large surface area is attempted. Suction action is generated by convecting away surrounding fluid, being either water or air, to produce local negative pressure at the pad position. The disclosed devices are most desirable in cleaning water containers, such as a fish tank or a swimming pool, as well as to collect dusts on scraping the surface of a mortar wall.

Description:
FEDERALLY SPONSORED RESEARCH  
         [0001]    (Not Applicable)  
         SEQUENCE LISTING OR PROGRAM  
         [0002]    (Not Applicable)  
         BACKGROUND  
         [0003]    1. Field of Invention  
           [0004]    This invention is directed to a method and two apparatuses obtaining suction control over surface cleaning and scraping. In other words suction control is provided with a cleaning/scratching pad allowing the pad to stick to the surface of an object to be cleaned/scraped thereby ensuring the effectiveness in cleaning/scraping. The scraped debris or dirts may be collected and removed after the cleaning/scraping process is completed.  
           [0005]    2. Prior Art  
           [0006]    In cleaning/scraping the surface of a container, a building, or a piece of glass, say, a cleaning/scraping pad is used by the prior art rubbing against the surface to remove the unwanted dirts, contaminants, stains, or pollutants there. This rubbing action may be automated by using an electric motor. However, the contact between the cleaning/scraping pad and the surface to be cleaned remains otherwise arbitrary, and the cleaning/scraping pad needs to be pushed with force usually provided by hands pressing firmly against the wall so as to develop good contact there. For removing adhesive contaminants bound tightly to the surface cleaning/scraping of the surface can be an elaborated and tiresome job, since it may requires extraordinary force to be exerted by hands over large areas, developing good contact between the cleaning/scraping pad and the surface so as to warrant effectiveness in cleaning/scraping. Furthermore, the prior art requires the movement of the cleaning/scraping pad to be manipulated manually. When cleaning/scraping over a large area, such as the outer surface of a big building, this can consume a lot of energy. A traction force is thus desired, automating the movement of a cleaning/scraping pad being sucked onto the surface of an object intended for cleaning/scraping.  
           [0007]    Good contact between a cleaning/scraping pad and the surface of a wall in the environment of a liquid, water or oil, for example, is even harder to obtain, since the fluid will exert a buoyant force against the movement of the cleaning/scraping pad, resulting in possibly an inert laminar layer separating the cleaning/scraping pad and the surface of the wall. This makes the cleaning/scraping job much more difficult than as in air. Automated cleaning/scraping is almost impossible by the prior art if cleaning/scraping is intended involving a liquid. Thus, cleaning/scraping the wall of a fish tank or a swimming pool, for example, is normally carried out manually, and the cleaning/scraping pad is usually held by hands rubbing against the wall of the fish tank or the swimming pool with force, implying the nature of this kind of jobs to be tedious and painful.  
           [0008]    In cleaning/scraping the surface of a wall in air or in a liquid the scrapped dirts or debris are usually not collected by the prior art. In preparing painting on a mortar wall or a dry wall, for example, the wall needs to be first scrapped with an abrasive pad to provide a smooth and flat surface. This generates tremendous ashes and dusts in air flying all over the room contaminating furniture nearby, rendering a process of nuisance and annoyance. Also, in cleaning, or brushing the gravels of a fish tank, the scrapped fish wastes and algae need to be collected and removed from the tank so as to maintain water quality. Again, this necessary step is lacking by the prior art.  
         OBJECTS AND ADVANTAGES  
         [0009]    Accordingly, it is an object of the invention to address one or more of the foregoing disadvantages or drawbacks of the prior art, and to provide such an improved method and apparatuses to obtain suction control over the surface cleaning/scraping process involving an abrasive/brushing pad. This allows the pad to be bound to the surface firmly with the suction force to be adjustable depending on the cleaning/scraping conditions. Suction control may be applied in air or in a liquid, not only to provide effectiveness in surface cleaning/scraping, but also to achieve conveniences and hence to save efforts in performing such a job. The scraped debris or dirts may be collected and removed due to the suction action, thereby rendering a comfortable and healthy working environment.  
           [0010]    Other objects will be apparent to one of ordinary skill, in light of the following disclosure, including the claims.  
         SUMMARY  
         [0011]    In one aspect, the invention provides a method which sets up suction control along with the mechanical motion of a cleaning/scraping pad, allowing the pad to stick to the surface of an object to be cleaned/scraped. Suction action starts if air or a liquid is continuously removed or thrown out near the spot of the surface to be processed. By controlling the flow rate of air or the liquid, the suction force can be controlled, resulting in desirable contact of the pad in brushing or scraping the surface of the object. The scraped debris is able to be collected and removed due to this suction action accompanying the cleaning/scraping motion of the pad.  
           [0012]    In another aspect, the invention discloses an apparatus which allows the suction action to be realized by using an automation machine, such as an electric motor. In operation the automation machine drives the cleaning/scraping pad to rub against a spot on the surface of an object to remove unwanted dirts, stains, or roughness there. Meanwhile, the automation machine continuously convects away the surrounding fluid near that spot on surface to create a suction force. As a consequence, the pad is pushed toward the surface of the object forming tight contact so as to render effectiveness in cleaning/scraping. The scraped debris or dirts may be collected and removed due to this induced suction action.  
           [0013]    In another aspect, the invention discloses an apparatus which allows the suction action to be realized manually, via the use of a mechanical setup to be manipulated by hands. The mechanical setup involves cranks, gears, pulleys, and belts whatever necessary to manage a torque at an axle. To operate the mechanical setup generates a torque which drives the cleaning/scraping pad to rub against a spot on the surface of an object to remove unwanted dirts, stains, or roughness there. Meanwhile, the generated torque also drives a paddle enabling the surrounding fluid near that spot on surface to be continuously convected away thereby creating a suction force. As a consequence, the pad is pushed toward the surface of the object forming tight contact so as to render effectiveness in cleaning/scraping. The scraped debris or dirts may be collected and removed due to this induced suction action. 
       
    
    
     DRAWINGS  
       [0014]    Figures  
         [0015]    For a more complete understanding of the nature and objectives of the present invention, reference is to be made to the following detailed description and accompanying drawings, which, though not to scale, illustrate the principles of the invention, and in which:  
         [0016]    [0016]FIG. 1A shows one example of the preferred embodiment of the invention that a Cleaner/Scraper Head is constructed consisting of 4 parts: Base/Side Assembly, Propeller, Cover, and Abrasive/Brush Pad Assembly. Top View and Side View of the Cleaner/Scraper Head are also provided.  
         [0017]    [0017]FIG. 1B shows more detail in the Abrasive/Brush Pad Assembly shown in FIG. 1A where a brush pad and a grinding pad may be distinguished; grooves may be carved on the surface of a grinding pad to facilitate convection of fluid flow on grinding a surface.  
         [0018]    [0018]FIG. 2 shows two examples of the preferred embodiment of the invention that Cleaner/Scraper Heads disclosed in FIG. 1A are used to construct Cleaning/Scraping Tools capable of scraping/brushing away stains or dirts appearing on the surface of a vertical wall immersed in water: one uses an electric motor, and the other uses a manual crank tool. Although demonstrated in water environment, the same apparatuses can be equally applied in air.  
         [0019]    [0019]FIG. 3 shows another example of the preferred embodiment of the invention that a Cleaner/Scraper Head disclosed in FIG. 1A is used to construct a cleaning/scraping tool capable of scraping/brushing away stains or dirts appearing on the surface of a horizontal wall immersed in water. A filter bag is included with the Cleaner/Scraper Head so that the scraped debris can be collected, subject to subsequent removal. Although demonstrated in water environment, the same setup can be equally applied in air.  
         [0020]    [0020]FIG. 4 shows another example of the preferred embodiment of the invention that a Cleaner/Scraper Head disclosed in FIG. 1A is used to construct a cleaning/scraping tool capable of scraping/brushing away stains or dirts appearing on the surface of a horizontal wall in air. Filter bag and the dust chamber have been integrated with the cleaning/scraping tool to achieve a compact size, and hence convenience in use. For cleaning purposes FIG. 4 shows an apparatus that combines a broom and a vacuum cleaner in one device. 
     
    
     REFERENCE NUMERALS  
       [0021]    [0021]                                         Reference Numerals                                101   Disassembled Parts of Cleaner/Scraper Head       102   Top View of Cleaner/Scraper Head       103   Side View of Cleaner/Scraper Head       110   Base/Side Assembly of Cleaner/Scraper Head       120   Propeller of Cleaner/Scraper Head       130   Cover of Cleaner/Scraper Head       140, 143   Abrasive/Brush Pad Assembly of Cleaner/Scraper           Head       111   Base/Side       112, 113, 114   Pipe Outlet       113   Through Hole       121   Paddle Arms       122   Cleaner/Scraper Axle       123   Pedestal Plate       141   Base Plate       142   Abrasive/Brush Pad       144   Grinding Plate       145, 146, 147, 148   Grooves       201   Side View of Automatic Cleaning/Scraping Tool at           Operation in Water       202   Side View of Manual Cleaning/Scraping Tool at           Operation       211, 212   Vertical Wall Immersed in Water to be Cleaned/           Scraped       213, 214   Water Surface       221   Cleaner/Scraper Handler       222   Cleaner/Scraper Handler (Hollow Cylinder)       223   Crank Shaft Rod       224   Spring Stopper/Shaft-End Knob       225   Crank Spring       231   Motor Housing       232   Crank Housing       233, 234   O-Ring       240   Electric Motor       241   Motor Axle       242   Wire Cable       243   Motor Controller       244   Power Plug       250   Crank       251   Crank Axle       252   Crank Joint       301   Side View of Automatic Cleaning/Scraping Tool at           Operation in Water       311   Horizontal Wall/Gravels Immersed in Water to be           Cleaned/scraped       313   Water Surface       321   Cleaner/Scraper Handler       331   Motor Housing       340   Electric Motor       341   Motor Axle       342   Wire Cable       343   Motor Controller       344   Power Plug       360   Filter Bag       361   Water Tube       401   Side View of Automatic Cleaning/Scraping Tool at           Operation in Air       411   Horizontal Wall in Air       421   Cleaner/Scraper Handler       431   Motor Housing       440   Electric Motor       441   Motor Axle       442   Wire Cable       443   Motor Controller       444   Power Plug       460   Filter Wall       461   Dust Chamber                    
       DETAILED DESCRIPTION  
       [0022]    Preferred Embodiment:—FIG. 1A and FIG. 1B  
         [0023]    [0023]FIG. 1A shows an example of the preferred embodiment of the invention that a Cleaner/Scraper Head,  101 , is constructed in terms of 4 parts: Base/Side Assembly  110 , Propeller  120 , Cover  130 , and Abrasive/Brush Pad Assembly  140 . Top View and Side View of Cleaner/Scraper Head  101  are also included with FIG. 1A, shown as  102  and  103 , respectively. The first part of Cleaner/Scraper Head  101  is Base/Side Assembly  110 , which includes Base/Side  111  with Pipe Outlet  112  opened at Side. A through hole  113  is included with Base located at center.  
         [0024]    The second part of Cleaner/Scraper Head  101  is Propeller  120 , including two perpendicular Paddle Arms  121  intersected at their respective centers. Cleaner/Scraper Axle  122  extends out from the center of Paddle Arms  121 , and a ring-shaped Pedestal Plate  123  is attached to the back of Paddle Arms  121  showing a circular symmetry. Propeller  120  is placed inside Base/Side Assembly  110  with Cleaner/Scraper Axle  122  of Propeller  120  inserted through Hole  113  located at Base center of Base/Side  111 . Cover  130  of Cleaner/Scraper Head  101 , which forms the third part, is then placed on top of Base/Side  111 , enclosing Propeller  120  inside Cleaner/Scraper Head  101 . Cover  130  assumes a ring geometry, whose outer diameter equals that of Base/Side  111 , and inner diameter to be slightly larger than the outer diameter of Pedestal  123 . As such, Pedestal  123  protrudes out from Cover  130 , capable of performing rotational motion conveyed through Cleaner/Scraper Axle  122 .  
         [0025]    Abrasive/Brush Pad Assembly  140 , which forms the forth part of Cleaner/Scraper Head  101 , is then mounted on top of Pedestal  123  installed with Propeller  120 . That is, Base Plate  141  of Abrasive/Brush Pad Assembly  140  has the same inner diameter as Pedestal Plate  123 , which may be attached to Pedestal Plate  123  either permanently or in a detachable manner. Although the outer diameter of Base Plate  141  is shown equal to the outer diameter of Pedestal Plate  123 , it is not necessary. Depending on the requirement in cleaning/scraping and in suction the outer diameter of Base Plate  141  can be larger or smaller than the outer diameter of Pedestal Plate  123 , providing more or less cleaning/scraping force than the suction force, respectively.  
         [0026]    Abrasive/Brush Pad  142  resides on top of Base Plate  141  performing cleaning/scraping action of Cleaner/Scraper Head  101 . After assembling, Top View and Side View of Cleaner/Scraper Head  101  are shown in FIG. 1A as  102  and  103 , respectively. Thus, via applying a torque at Cleaner/Scraper Axle  122 , Paddle Arms  121 , as well as Abrasive/Brash Pad  142 , can then be set up to rotate. While the latter part provides the cleaning/straping action, the former part serves as a pump, sucking in air or a liquid at the central portion of Cleaner/Scraper Head  101 ,  102 , or  103 , conveying it toward periphery, then dispersed out at Pipe Outlet  112 .  
         [0027]    When Cleaner/Scraper Head  101 ,  102 , or  103  is brought close to the surface of an object, pumping of the fluid, say, air or a liquid, performed by Propeller  120  converts into suction action, provided that Abrasive/Brush Pad  142  shows a porous structure to be permeable to the fluid flow. This is generally true for a scrubbing pad or a brush pad. However, for a grinding pad made of sand paper, for example, this condition is generally not true. For a grinding pad grooves need to be cut on the surface to allow the pad to be permeable to fluid flow. Both Brush Pad and Grinding Pad are shown in FIG. 1B, referred to as  140  and  143 , respectively. For Grinding Pad  143  Groves  145 ,  146 ,  147 ,  148  are cut on surface of Pad  144  residing on Base Plate  141 . Without Grooves  145 ,  146 ,  147 ,  148  Grinding Pad  143  may be entirely sucked onto the surface of an object too tight to be movable.  
         [0028]    The generated suction force pushes forward Cleaner/Scraper Head  101 ,  102 , or  103  to form tight enough contact with the surface of an object, enabling Abrasive/Brash Pad  142  in FIG. 1A to clean or scrape that surface with efficiency. This suction force can be adjusted by varying the rotational speed of Paddle Arms  121 , and slower the motion of Paddle Arms  121  implies a lighter suction force, and vise versa. In FIG. 1A Paddle Arms  121  may assume other geometries, so long as air or the liquid is continuously removed or convected away from the local area of the surface subject to cleaning/scraping.  
         [0029]    More than one Pipe outlets may appear surrounding the side of Base/Side  111  shown in FIG. 1A. A 90° elbow may be used connecting Pipe Outlet  112  so that air or the liquid is ejected or threw away toward the backward direction. As such, the counteraction force due to ejection or throwing reinforces the suction action of pumping. Alternatively, Pipe Outlet  112  shown in FIG. 1A has the advantage of providing a traction force for guiding the movement of Cleaner/Scraper Head  101 ,  102 , or  103 . Ejecting or throwing air or the liquid along one horizontal direction implies a traction force along the opposite direction. In performing heavy-duty cleaning/scraping a large suction force is desired, which also means a large inertia for Cleaner/Scraper Head  101 ,  102 , or  103  to move. In this case a traction force is needed, facilitating the movement of Cleaner/Scraper Head  101 ,  102 , or  103 , alleviating the labor required for cleaning/scraping, especially when cleaning/scraping is required over a large surface area. Multiple Pipe Outlets each equipped with individual valve control are thought advantageous for the operation of a complex Cleaner/Scraper Head apparatus providing sophisticated and efficient scraping/suction/traction controls at operation, especially when used over a large surface area requiring heavy-duty operation. Debris resulted from the cleaning or scraping process can be collected by connecting a filter bag at Pipe Outlet  112 , as discussed with FIG. 3 below.  
         [0030]    Preferred Embodiment:—FIG. 2  
         [0031]    [0031]FIG. 2 shows two configurations that cleaning/scraping tools are constructed using same Cleaner/Scraper Head  103  shown in FIG. 1A. Cleaning/Scraping Tool  201  uses an automation machine such as an Electric Motor  240  to drive Cleaner/Scraper Axle  122  of Cleaner/Scraper Head  103 , whereas a manual device of Crank  250  is illustrated with Cleaning/Scraping Tool  202 . In Comparison with FIG. 1A, in FIG. 2 Cleaner/Scraper Head  103  has been rotated 90° upward for ease of demonstration. Motor Axle  241  and Crank Axle  251  are connected to Cleaner/Scraper Axle  122  of Cleaner/Scraper Head  103  for Cleaning/Scraping Tool  201  and Cleaning/Scraping Tool  202 , respectively. For Cleaning/Scraping Tool  201  Electric Motor  240  is enclosed in Motor Housing  231 , AC powered through Power Plug  244  connected to Wire Cable  242 . Motor Controller  243  is inserted with Power Cable  242 , capable of, for example, turning on and off the power line on one hand, and adjusting the rotational speed of Electric Motor  240  on the other hand. As a consequence, the pumping/scraping action, and hence the suction action of Cleaner/Scraper Head  103  can thus been controlled. In FIG. 2 although AC power is illustrated with Cleaning/Scraping Tool  201 , DC power can equally be used, and Electric Motor  240  can be either an AC-type motor or a DC-type motor. Cleaner/Scraper Handler  221  is connected to Motor Housing  231 , providing support for Cleaning/Scraping Tool  201 . Cleaner/Scraper Handler  221  may be rotated relative to the axial direction of Electric Motor  240  so that the cleaning/scraping action of Cleaner/scraper Head  103  can be varied at different orientations relative to the direction of Cleaner/Scraper Handler  221 . FIG. 3 below shows such a variation. Gear assembly may be inserted between Motor Axle  241  and Cleaner/Scraper Axle  122  of Cleaner/Scraper Head  103  to facilitate rotational speed adjustment.  
         [0032]    In FIG. 2 Cleaning/Scraping Tool  202  is manipulated manually, and Crank  250  is used to convert the up-and-down motion of Crank Shaft Rod  223  into rotational motion of Crank Axle  251 . By coupling Crank Axle  251  to Cleaner/Scraper Axle  122 , the cranking action of Crank  250  in turn drives Cleaner/Scraper Head  103  to perform cleaning/scraping and suction actions. Crank Joint  252  is inserted between Crank Shaft Rod  223  and Crank  250  contained in Crank Housing  232 . Cleaner/Scraper Handler  222  connects to Crank Housing  232  to provide support for Cleaning/Scraping Tool  202 . Crank Handler  222  shows the geometry of a hollow cylinder to contain Crank Shaft Rod  223  at center. Crank Spring  225  is inserted between Spring Stopper/Shaft-End Knob  224  and the end of Cleaner/Scraper Handler  222 , as shown in FIG. 2. To operate one may grasp Cleaner/Scraper Handler  222  using four fingers of one hand with the other finger, say, the thumb, pressing and then releasing Spring Stopper/Shaft-End Knob  224  repetitively. Or, one may grasp Cleaner/Scraper Handler  222  using one hand and press and then release Spring Stopper/Shaft End  224  repetitively using the other hand. In both manners Crank Shaft Rod  223  is set forth to perform up-and-down motion, thereof drives Crank Axle to perform rotational motion via the coupling of Crank  250 . Gear assembly may be inserted between Crank Axle  251  and Cleaner/Scraper Axle  122  of Cleaner/Scraper Head  103  so as to tune the rotational speed and hence the scraping/pumping efficiency of Cleaning/Scraping Tool  202 . Alternatively, gear assembly, or other mechanical means, including pulleys, belts, etc., is required to change the coupling orientation of Crank Axle  251  relative to the direction of Crank Shaft Rod  223 , if they do not run perpendicular to each other as shown with Cleaning/Scraping Tool  202  in FIG. 2.  
         [0033]    In FIG. 2 both Cleaning/Scraping Tools  201  and  202  are illustrated to operate in water environment, occurring in a container such as a fish tank or a swimming pool, for example. Container Walls to be cleaned/scraped are shown as  211  and  212  and Water surfaces  213  and  214  are demonstrated for Cleaning/Scraping Tools  201  and  202 , respectively. In order to seal tight Motor Housing  231  and Crank Housing  232  against water leak, O-Ring  233  and O-Ring  234  are used respectively at their respective outlets confronting Cleaner/Scraper Head  103 .  
         [0034]    Along with the cleaning/scraping action of Cleaning/Scraping Tools  201  and  202  water flow directions are also illustrated in FIG. 2, indicating how the suction action provided by Cleaner/Scraper Head  103  to occur. That is, because water is continuously pumped out from the spot at the surface of Container Wall  211  and  212 , negative pressure results thereof, causing Cleaner/Scraper Head  103  to be sucked toward Container Wall  211  and  212 , thereby facilitating the intended cleaning/scraping action. In FIG. 2 water is ejected in the upward direction, giving rise to a traction force exerted on Cleaner/Scraper Head  103  in the downward direction. Traction force for Cleaning/Scraping Tools  201  and  202  is desirable, since Cleaner/Scraper Head  103  may be tightly sucked onto Container Wall  211  and  212 , performing sufficient cleaning/scraping action there. In the absence of a traction force the movement of Cleaner/Scraper Head  103  might then be sluggish. Alternatively, 90° elbows may be equipped with Pipe Outlet  112 , if the suction action of Cleaner/Scraper Head  103  does not cause a problem. By throwing water in the backward direction, further push of Cleaner/Scraper Head  103  toward Container Wall  211  and  212  is realized, reinforcing the generated suction force there according to Newton&#39;s third law.  
         [0035]    Although Cleaning/Scraping Tools  201  and  202  are illustrated in FIG. 2 in water environment for the purpose of cleaning/scraping, they do not have to be limited to be so. Actually, the same Cleaning/Scraping Tools  201  and  202  can be used in air, performing cleaning, abrading, or grinding actions onto a dry-wall or a mortar-wall surface, for example. More Pipe Outlets  112  may be installed with Cleaner/Scraper Head  113 , and a balance between the resultant suction force and the traction force exerted on Cleaner/Scraper Head  113  can thereof be optimized. This is done via considering the porosity of Abrasive/Brush Pad  142  shown in FIG. 1A, as well as the required speed of Propeller  120  in performing the cleaning/scraping action, as discussed in association with FIG. 1B.  
         [0036]    Preferred Embodiment:—FIG. 3  
         [0037]    [0037]FIG. 3 shows another configuration that Cleaning/Scraping Tool  301  is constructed using, again, the same Cleaner/Scraper Head  103  shown in FIG. 1A. Similar to Cleaning/Scraping Tool  201  shown in FIG. 2, Cleaning/Scraping Tool  301  shown in FIG. 3 uses an automation machine such as an Electric Motor  340  to drive Cleaner/Scraper Axle  122  of Cleaner/Scraper Head  103 . Motor Axle  341  is connected to Cleaner/Scraper Axle  122  of Cleaner/Scraper Head  103 . Electric Motor  340  is enclosed in Motor Housing  331 , AC powered through Power Plug  344  connected to Wire Cable  342 . Motor Controller  343  is inserted with Power Cable  342 , capable of, for example, turning on and off the power line on one hand, and adjusting the rotational speed of Electric Motor  340  on the other hand. As a consequence, the pumping/cleaning, and hence the suction, action provided by Cleaner/Scraper Head  103  can thus been controlled. In FIG. 3 although AC power is illustrated there, DC power can equally be used, and Electric Motor  340  can be either an AC-type motor or a DC-type motor. Cleaner/Scraper Handler  321  is connected to Motor Housing  331 , providing support for Cleaning/Scraping Tool  301 . In contrast to Cleaning/Scraping Tool  201  shown in FIG. 2 Cleaner/Scraper Handler  321  in Cleaning/Scraping Tool  301  runs parallel to the axial direction of Electric Motor  340 , intended for cleaning/scraping the bottom surface of Container Wall  311  in water environment. In a fish tank gravels may appear at the bottom surface, and Cleaning/Scraping Tool  301  can be used to clean, or more precisely, to brush, the gravels. Water Surface is shown in FIG. 3 as  313 .  
         [0038]    The other difference shown with Cleaning/Scraping Tool  301  in FIG. 3 is the addition of Filter Bag  360  connected to Pipe Outlet  112  of Cleaner/Scraper Head  103  via Water Tube  361 . Along with the cleaning/scraping action of Cleaner/Scraper Head  103 , water is continuously pumped out from a spot on Container Wall  311  to be cleaned/scraped, ejected from Pipe Outlet  112 , passing through Water Tube  361 , entering Filter Bag  360 . Water flow directions are illustrated in FIG. 3. Filter Bag  360  is permeable only to water flow, but not to debris or dirts left off due to the cleaning/scraping action performed at the surface of Container Wall  311 . Therefore, debris and dirts are separated from water, to be kept in Filter Bag  360  subject to subsequent removal. In this manner, not only container wall of a fish tank can be cleaned/scraped, for example, but also the surfaces of gravels, rocks, and decorations whatever immersed under water contained by a fish tank, thereof making it possible for convenient maintenance in water quality. Feeding and watching a tropical fish is of a great fun. However, cleaning and scraping a fish tank thereby maintaining water quality is of a great pain, especially to those people who hate to get their hands wet. By using Cleaning/Scraping Tool  301  shown in FIG. 3 cleaning/scraping a fish tank is no longer painful, allowing automation to result with effectiveness without requiring hands to be dipped in water. A manual tool similar to Cleaning/Scraping Tool  202  shown in FIG. 2 intended for fish-tank maintenance can also be constructed.  
         [0039]    Cleaning/Scraping Tool  301  shown in FIG. 3 can also be used in air not necessarily to assume water environment. For example, before painting a drywall or a mortar wall, the surface needs to be grinded first so as to make it clean, smooth, and flat. In grinding the surface of a drywall or a mortar wall, however, ashes and dusts are inevitably generated, creating a nasty environment at work. By using Cleaning/Scraping Tool  301  shown in FIG. 3 scraping a mortar surface, say, is no longer an offensive process, since ashes and dusts are all collected in Filter Bag  360  before they could otherwise be set out to fly in a house. Other discussions appearing with FIG. 1A, FIG. 1B, and FIG. 2 can equally apply for Cleaning/Scraping Tool  301  shown in FIG. 3.  
         [0040]    Preferred Embodiment:—FIG. 4  
         [0041]    [0041]FIG. 4 shows another configuration that Cleaning/Scraping Tool  401  is constructed using, again, the same Cleaner/Scraper Head  103  shown in FIG. 1A. Similar to Cleaning/Scraping Tool  301  shown in FIG. 3, Cleaning/Scraping Tool  401  shown in FIG. 4 uses an automation machine such as an Electric Motor  440  to drive Cleaner/Scraper Axle  122  of Cleaner/Scraper Head  103 . Motor Axle  441  is connected to Cleaner/Scraper Axle  122  of Cleaner/Scraper Head  103 . Electric Motor  440  is enclosed in Motor Housing  431 , AC powered through Power Plug  444  connected to Wire Cable  442 . Motor Controller  443  is inserted with Power Cable  442 , capable of, for example, turning on and off the power line on one hand, and adjusting the rotational speed of Electric Motor  440  on the other hand. As a consequence, the pumping/cleaning, and hence the suction, action provided by Cleaner/Scraper Head  103  can thus been controlled. In FIG. 4 although AC power is illustrated, DC power can equally be used, and Electric Motor  440  can be either an AC-type or a DC-type motor. Cleaner/Scraper Handler  421  is attached to Motor Housing  431 , providing convenient handling of Cleaning/Scraping Tool  401 . In contrast to Cleaning/Scraping Tool  301  shown in FIG. 3 Cleaning/Scraping Tool  401  shown in FIG. 4 is illustrated for use in air, and a Horizon Wall  411  is referred. Of course the same Cleaning/Scraping Tool  401  shown in FIG. 4 can apply to a vertical wall, and it can be used in water environment.  
         [0042]    The other difference shown with Cleaning/Scraping Tool  401  in FIG. 4 is the integration of Water Tube  361  and Filter Bag  360  in FIG. 3 with Cleaning/Scraping Tool  301  to form a compact unit, becoming Dust Chamber  461  and Filter Wall  460  in FIG. 4, respectively. That is, in FIG. 4 Dust Chamber  461  assumes a cylindrical geometry surrounding Motor Housing  431  with Filter Wall  460  covered from top, allowing air, but not dusts to exit. Bottom of Dust Chamber  461  is otherwise sealed. In FIG. 4 four Pipe Outlets are included, referred to as  112  at left,  113  at front,  114 , at right, and  115  at back. The Pipe Outlet  115  at back is not seen in FIG. 4. In order to accommodate the geometry of Dust Chamber  461  Pipe Outlets  112 ,  113 ,  114  and  115  possess zero length, exhibiting opening holes serving as air/dust entrances. This allows Dust Chamber  461  to be easily removed from the unit, for example, when it is time to dump the collected dusts or garbage. Air flow directions are also shown in FIG. 4. In accompanying the cleaning/scraping motion of Cleaner/Scraper Head  103 , air mixed with dusts or debris stripped off from the surface of Wall  411  is sucked into Dust Chamber  461  through the four hole openings at Outlets  112 ,  113 ,  114 , and  115 . While air is allowed to pass across Filter Wall  460 , dusts are kept in Chamber  461  until it is removed from the unit to be emptied. The induced suction force also help making good contact between Cleaner/Scraper Head  103  with the surface of Wall  411  so as to facilitate the intended cleaning/scraping process there, as discussed previously.  
         [0043]    One minor difference shown in FIG. 4 includes the dimension change of Abrasive/Brush Pad Assembly  140  of Cleaner/Scraper Head  103  shown in FIG. 1A. In FIG. 4 Cleaning/Scraping Tool  401  assumes a larger outer diameter for Abrasive/Brush Pad Assembly  140  than depicted in FIG. 1A. This implies a relatively stronger cleaning/scraping force and a relatively weaker suction force, as compared with those shown in FIG. 2, Cleaning/Scraping Tool  201 ,  202 , and that in FIG. 3, Cleaning/Scraping Tool  301 . Cleaning/Scraping Tool  401  shown in FIG. 4 may be used as a carpentry tool capable of grinding/sanding a wooden surface without generating much dusts. For this application a grinding pad is assumed, as discussed with Abrasive/Brush Pad  143  shown in FIG. 1B. Alternatively, it serves as a powerful cleaning tool capable of removing garbage or dirts in nasty environment, including the worst situations where dusts are mixed with water and/or oil. That is, when a brush pad is equipped with Cleaner/Scraper Head  103  shown in FIG. 1A, Cleaning/Scraping Tool  401  shown in FIG. 4 provides dual operations of a broom and a vacuum cleaner. While the cleaning/scraping action provided by Cleaner/Scraper Head  103  serves as a broom, the suction action generated by Paddle  120  shown in FIG. 1A behaves exactly like a vacuum cleaner. The combination of two cleaning/scraping devices in one can no doubt amplify their respective functions. Other discussions appearing with FIG. 1A, FIG. 1B, FIG. 2, and FIG. 3 can equally apply for Cleaning/Scraping Tool  401  shown in FIG. 4.  
         [0044]    Conclusions  
         [0045]    Cleaning/Scraping Tools  201 ,  202  shown in FIG. 2 and  301  shown in FIG. 3 can be applied under general conditions in air and/or in water environments. An effective cleaning/scraping pad can thus be realized rubbing against a contaminated wall or a rough wall providing efficiency, since the pad is allowed to suck toward the wall insuring good contact for the rubbing action. Traction force on the pad is also possible, navigating the movement of the pad across the surface to be cleaned or scraped. This facilitates cleaning or scraping over a large surface area. Furthermore, the suction action allows the dusts or dirts scraped off from the surface to be collected, thereby achieving desirable conditions in cleaning/scraping. This invention is most favorable in the following areas, although other applications may also be readily found:  
         [0046]    dual vacuum cleaner/broom tool  
         [0047]    cleaning/scraping a swimming pool  
         [0048]    cleaning/maintaining a fish tank  
         [0049]    abrading/preparing the surface of a mortar wall/dry wall  
         [0050]    preparing/polishing wooden surfaces  
         [0051]    cleaning/scraping the outside surface of big building  
         [0052]    cleaning/scraping seashore rocks contaminated with oil  
         [0053]    cleaning/Maintaining an oil tank