Abstract:
A vehicle for scraping a floor has an adjustable blade with various widths mountable thereon and is an appropriate vehicle size for moving through a standard door.

Description:
BACKGROUND OF THE INVENTION 
     Removing floor covering material affixed to an underlying floor can be a tedious task. Several floor covering removal machines are known. Of these prior art machines, several are large machines ridden by an operator. Some other machines are significantly less in weight than others, for which the operator walks behind the machine. 
     Several types of machines exist on the market for removing tile, carpeting, or other coverings from a floor. There are also machines specially designed for resurfacing floors. However, there does not seem to be any machine which can combine the two operations. 
     Also, in each known floor covering, scraping or removing machine; there is an absence of a machine counterbalancing system to adjust the bias of the scraping element against the floor. Such a bias adjustment permits more efficient use of the machine and work. 
     A problem with the riding machines is that their size makes them difficult to use and maneuver in indoor areas. For example, such riding machines are too large to pass through a standard door. An advantage is that the large machines are able to generate large forces for stripping the floor covering. 
     A problem with the lighter weight, walk-behind machines is that they do not generate as much power for stripping floor covering, and thus are less effective at stripping tiles and carpeting secured by adhesives or epoxies. An advantage of the walk-behind machines is that they are smaller, can fit into smaller areas, and are more maneuverable than the larger machines. 
     Accordingly, there is a need for a floor covering removal machine, which has the power of the larger riding machines, without having the disadvantages of the large size and comparatively poorer maneuverability, especially for indoor use. The scraping capabilities of that machine must also be maintained. 
     Motor or hand-propelled devices for removing covering from horizontal surfaces such as floors and decks are well known. These devices typically include a blade which is wedged between the supporting surface and the covering to be removed. As the apparatus moves forward, the blade strips the covering from the surface. The lack of capability for the apparatus to adjust to irregularities in the contour of the surface adversely influences the efficiency of covering removal. These contours may include pits, grooves, adhesive residue, or other material. 
     Although some devices known in the art purport to adjust to the changing contours of the supporting surface, their use in the field is not satisfactory. The stripping blades of these prior art devices jump or slip out of operating position onto the top of the covering sought to be removed. As the speed of the stripping operation increases, the frequency of blade slippage over even minor contours increases. 
     When any of the above types of buildings are renovated, or when a new floor layer is required under any circumstances, it is first desired, if not absolutely required, to remove the pre-existing floor covering. The removal of the floor coverings is an arduous task because the existing floor coverings are securely fixed to the base surface such that the covering does not come unattached during its useful life. 
     Numerous types of physical attachment devices, such as thermosetting resin and epoxy resin, are employed to affix the floor cover to the underlying surface. Thus, when a floor covering is to be removed, the mechanism which adheres the floor covering to the underlying surface, usually an adhesive, must also be removed, in order for a clean surface to be presented for the application of the new floor covering. However, the strength of the adhesive, not only hinders removal of the adhesive, but often results in incomplete removal of the floor covering. Then, a portion of the floor covering remains adhered to the underlying surface by the adhesive, and result in a patchwork effect. 
     Human hand labor is the first, and most inefficient, means of removing floor coverings. Humans do not possess the strength necessary to remove floor coverings in most circumstances, even with hand tools. Hand operated or walk-behind machines are employed which grind or abrade the floor covering and connecting adhesive from the underlying surface. 
     However, these powered devices are dangerous. Not only can the high-speed vibrating portion of the mechanism can injure the worker, the particulate matter created by the grinding process is injurious to workers&#39; respiratory system. Additionally, these hand-held or walk-behind devices do not completely remove the floor covering and underlying adhesive because the power source, which is limited by the relatively small size of the hand-held device, is insufficient for the task. 
     Larger machines are also known to be employed, in which the machine is powered by a hydraulic power source located at a distance. The cables associated with the hydraulic power source are cumbersome, and these machines, as with the hand-held machines, generally attempt to grind or abrade the floor covering and adhesive from the underlying floor surface, which results in the dissemination of unhealthful particulate matter. Furthermore, grinding or abrading is a time-consuming and inefficient method of removing the surface layer and underlying adhesive, because not only must the entire floor area be traveled (width times length), but the entire depth of the surface covering and adhesive must also be traversed. 
     While machines are generally known for scraping one or more surface layers from an underlying layer, such as road levelers and the like, these devices are entirely inappropriate for use on floor covering and underlying adhesives. These devices lack the combination of compact size, economy of use and efficiency of operation to be time and cost effective. 
     It is necessary from time to time to remove materials from floors, roofs and other surfaces. Examples of such materials include linoleum, vinyl, rubber, urethane, epoxy and other plastics, and asbestos or asbestos-containing building materials for flooring. Other materials include roofing and waterproofing materials, wood, and adhesive. 
     The removal of the material may be accomplished by hand-using hand-held blades, but such means of removal is expensive and difficult, and requires considerable effort on the part of the humans employed for the purpose. The considerable time required to remove the materials is of particular disadvantage when the material is removed from a store or other place of business, often requiring the business to remain closed during the process. In some circumstances, it may even be physically impossible to remove the materials by hand. 
     Machines are available for this purpose, but they have disadvantages. For example, many of the available machines do not offer sufficient power or speed to remove the more difficult materials from the surface. Some machines offer minimal or limited flexibility in the available angles of the removal blade. Such machines often require that the angle of the removal blade be adjusted manually, forcing the user to disembark from the machine to adjust the blade angle. This feature increases the expense, complexity and maintenance costs of the machine. 
     SUMMARY OF THE INVENTION 
     Among the many objectives of this invention is the provision of a vehicle small enough to maneuver within a building and powerful enough to scrape or remove a covering or coverings from a floor. 
     A further objective of this invention is the provision of a vehicle for removing at least one surface layer from a floor or the like. 
     Yet a further objective of this invention is the provision of a vehicle for forcing a blade member between the layer or layers to be removed with the application of sufficient force. 
     Also, an objective of this invention is the provision of a vehicle for forcing a blade member between the floor and the underlying layers with the application of sufficient force. 
     Another objective of this invention is the provision of a vehicle, which adjusts between a first machine transport position for movement of the vehicle from location to location, and second surface scraping position. 
     Yet another objective of this invention is the provision of a vehicle in which the relative weight over the blade of the vehicle can be altered to achieve the optimum desired mass balance of the vehicle. 
     Still another objective of this invention is the provision of a vehicle, in which the position of the portion of the vehicle supporting the blade can be altered with respect to the horizontal to provide a first degree of adjustment. 
     A further objective of this invention is the provision of a vehicle in which the blade can be angled with respect to horizontal to provide a second degree of adjustment. 
     A still further objective of this invention is the provision of a vehicle in which the angle of scraping of the blade with respect to the surface having a cover being removed therefrom can be precisely controlled. 
     Yet a further objective of this invention is the provision of a vehicle, in which the vehicle is mountable by a machine operator during use. 
     Also, an objective of this invention is the provision of a vehicle capable of being moved over a carpeted floor, with minimal damage thereto. 
     Another objective of this invention is the provision of a vehicle, which includes a blade capable of floating over the surface being scraped. 
     Yet another objective of this invention is the provision of a vehicle, which may receive a variety of attachments. 
     These and other objectives of the invention (which other objectives become clear by consideration of the specification, claims and drawings as a whole) are met by providing a self-propelled vehicle, having an adjustable blade being mounted thereon and being suitable for use in scraping a floor, with at least one optional attachment. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 depicts a perspective of a conventional, walk-behind floor stripping or scraping device  102  of the prior art handled by a walking operator  106  in a walk behind fashion. 
     FIG. 2 depicts the floor stripping vehicle  100  of this invention, with a driving operator  108 . 
     FIG. 3 depicts the floor stripping vehicle  100  of this invention in its edge cleaning mode  122 . 
     FIG. 4, depicts the floor cleaning vehicle  100  of this invention in a weighted pressure scraping position  124 . 
     FIG. 5 depicts the floor cleaning vehicle  100  of this invention passing through a standard doorway  114 . 
     FIG. 6 depicts the floor cleaning vehicle  100  of this invention fitting into a standard passenger elevator  116 . 
     FIG. 7 depicts a perspective exploded view of the flat scraping assembly  200  of this invention. 
     FIG. 8 depicts an assembled, perspective view of the scraping assembly  200  of this invention. 
     FIG. 9 depicts the rocking features of the blade assembly  220  for the scraping assembly  200  of this invention. 
     FIG. 10 depicts blade rotation procedure blade assembly  220  in order to sharpen blade  256  while mounted in the scraping assembly  200  on the vehicle  100  of this invention. 
     FIG. 11 depicts a modification of the vehicle  100  of this invention having a caster wheel  300  for moving vehicle  100  around a job site. 
     FIG. 12 depicts a front perspective view of the mounting base  198  with the grinding mechanism  268  in place. 
     FIG. 13 depicts a front perspective view the mounting base  230  with a cutting wheel  600  in place. 
     FIG. 14 depicts a catalytic converter  650  on a diesel engine  652  for the vehicle  100  of this invention. 
     FIG. 15 depicts a perspective exploded view of the bar scraping assembly  608  of this invention. 
     FIG. 16 depicts the floor stripping vehicle  100  of this invention, with a wide blade  680  in place. 
    
    
     Throughout the figures of the drawings, where the same part appears in more than one figure of the drawings, the same number is applied thereto. 
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     The present invention generally pertains to a machine for removing at least one surface layer from a floor or the like. One or more surface layers, which are removable by the vehicle of the present invention include, but are not limited to, carpet, vinyl tile, vinyl sheet goods, hardwood flooring, hardwood parquet, elastomeric coatings, soft surface sports coating, marble, slate, grout, porcelain and epoxy resin. Surface coatings of the above types are generally found in, for example, homes, office buildings, stores, sports arenas, malls or similar structures. 
     The blade assembly is preferably narrower than the vehicle. This blade assembly can move slightly out of a horizontal plane and adjust to a floor. The blade assembly can also be rotated 180 degrees and thus have a minimum need for sharpening. 
     The vehicle can be based on a skid steer, whereby two wheels on one side will stop and the two wheels on the other side will drive the vehicle into a skidding turn. Alternatively, with the four wheels each being powered, the tractor can be maneuvered effectively, when used to scrape a floor. Whatever maneuverability for the vehicle is achieved, the joy stick arrangement provides for scraping manipulation with hydraulic control. 
     When the blade assembly is replaced with the caster, the vehicle becomes more maneuverable. A caster version or modification of a vehicle provides better maneuverability on carpet and the like. Also, such a caster permits the vehicle to be maneuvered without damage to the floor or a covering thereon. 
     This four-wheel drive vehicle can have its center of gravity situated between the four wheels. In this fashion, the weight of the vehicle is more evenly distributed and the scraping becomes more efficient. The scraper mounting device includes an angle top edge for support, which is pinned to the vehicle. 
     This angled top edge receives blade support. On the blade support is a top angled portion to receive the angled support on the vehicle. Extending from the blade support is a tubular member adapted to receive the blade tube. The blade assembly has a tube end and a clamping end. The scraping blade is secured in the clamping end. 
     In the tube end is a tube aperture adapted to receive a pin and lock the scraping blade in the blade support tube. The aperture in the blade support tube is slotted in order to provide for movement of the blade tube about the pin with the blade support tube. Such movement allows the blade to stay on the floor when the machine body and scraping device rotate oppositely about the horizontal plane. 
     Also, in this fashion, by pulling the pin, the blade can be turned over and the other side of the scraping blade can be used. By using the side to the scraping blade in reverse order in this fashion, the problem with a dull scraping blade can be avoided and blade life is extended. 
     There are three tubes on the front of the blade support. These three tubes permit the proper positioning of the blade assembly, and hence the blade. The left end tube and the right end tube permits scraping of the edge of the floor. The center tube permits scraping down the center. With this weighted distribution and flexibility provided by the slot in the tube, the scraping blade has flexibility and can achieve the desired result of scraping the floor in an efficient fashion. 
     Any suitable power source may be used for the vehicle of this invention, so long as the required dimensions, weight and power are not compromised. To that end, a gasoline-powered engine, an electrically powered engine, a natural gas-powered engine, a propane-powered engine, or other suitable power source may be used. 
     In a preferred form, a diesel engine is used on the vehicle. This diesel engine has a catalytic convertor connected thereto, which cuts the pollutants down to an extremely acceptable level from an Environmental Protection Agency standpoint and permits this vehicle to be used indoors. As above stated it is desired that the floor be concrete or extremely heavy duty. 
     While the scraping blade can be used on a standard wood floor in a house, there is a danger on the heaviness of the vehicle scraping the floor. However, the basic intent of this feature is for scraping floors in an industrial situation. The width of the vehicle permits it to go through most standard doorways, in order to enter conveniently, so that the scraping can be accomplished in a very efficient fashion. 
     In a preferred fashion, the scraping blade has an angle of about 20 to about 55 degrees relative to the front plate of the support plane. More preferred, the scraping blade has an angle of about 25 to about 50 degrees relative to the front plate of the support plane. Most preferred, the scraping blade has an angle of 30 to 45 degrees relative to the front plate of the support plane. With this angle, the scraping blade scrapes more efficiently on the floor. The scraping blade is lifted with a standard hydraulic assembly. 
     The scraping blade support can also support a grinder mechanism. There is a supplemental hydraulic connection for the grinder mechanism. This supplemental hydraulic mechanism operates the grinding wheels. With the grinding mechanism, the floor can be ground and stripped more easily, including, but not limited to, removal of the adhesive on the floor. 
     A particular type of grinder for this matter includes three slots. These slots receive the actual grinding mechanism. With the slots, the appropriate grinding mechanism can be inserted therein and provide for polishing. The slots can secure frictionally, mechanically or combinations thereof the grinder member within the slot to the grinding wheel. Preferably, there are three grinding wheels which are secured therein. In this fashion, the floor can be stripped very efficiently. 
     For the purpose of this invention, on all small tractors having a vehicle width sufficient to permit the vehicle to pass through a door is required. For example, on a vehicle with a width of 80 centimeters (30 inches) or less based on the doorway, a scraping blade can be mounted for scraping a floor covering off of a concrete floor preferably. It is also possible to use it on a wood floor. However, the floor must be extremely heavy duty and able to take substantial punishment. In this fashion, the covering on the floor can be removed and the appropriate cover can be placed. 
     While any blade width for the blade assembly is operable, certain parameters apply. The parameters vary based on the and are determinable based on this disclosure, with relation to the surface being scraped. 
     For a difficult surface, like tile, the blade assembly for the vehicle preferably has a width substantially less than the width of the vehicle. Such a narrow blade assembly provides for efficient scraping on an extremely difficult surface. For the difficult surface, a blade width of up to 50 percent of the vehicle width may be used. More preferably for the difficult surface, a blade width of up to 40 percent of the vehicle width may be used. Most preferably for the difficult surface, a blade width of up to 35 percent of the vehicle width may be used. 
     However, for less difficult surfaces, such as carpeting, a blade width of up to 200 percent of the vehicle width may be used. More preferably for the less difficult surface, a blade width of up to 175 percent of the vehicle width may be used. Most preferably for the less difficult surface, a blade width of up to 160 percent of the vehicle width may be used. 
     In FIG. 1 is depicted a standard walk behind scraping device  102 . The walking operator  106  pushes the powered, rotating, scraping device  102  with a handle  104  and accomplishes a scraping of a floor  112 . This requires great strength on the part of the operator  106  and provides difficulty in handling the scraping device  102 . 
     In the vehicle  100  of FIG. 2, driving operator  108  uses the blade assembly  220  for scraping. The driving operator  108  rides on the vehicle  100 , which is small enough to go through a doorway  114  (FIG. 5) or fit into a passenger elevator  116  (FIG.  16 ). This vehicle  100  has a flat scraping assembly  200  mounted on the front thereof, with a blade assembly  220 . 
     With the addition of FIG. 3, the blade assembly  220  has the flexibility to move according to the floor  112  and be adjusted accordingly to scrape the edge of the floor  112  also. It is also possible to have a blade assembly  220  the full width of the vehicle  100 . However, this narrower blade assembly  220  is preferred for more efficient scraping. 
     Thus, there are many advantages to this vehicle  100 . The vehicle  100  is designed to be less a standard doorway in width. The vehicle  100  has a seat  110  mounted thereon. A joy stick assembly  160  controls the hydraulic system  162  and permits the blade  256  to be adjusted upwardly or downwardly. 
     The four wheel drive aspects of, the engine  402  permit the vehicle  100  to maneuver and avoid both the problems, occurring with a standard caster vehicle of the prior art. One of the main problems is the hanging up of the vehicle  100  on the material that has already been scraped up. In this fashion, the desired results of efficient scraping of an industrial type floor can be achieved. 
     Furthermore, FIG. 3 depicts how the blade assembly  220  can he placed in its edge cleaning mode  122  and thus can permit edge cleaning of floor  112 . Blade assembly s  220  is secured in a different shaft receiving cylinder  232 , which aligned slightly outside vehicle  100 . In this manner the edge of floor  112  may be scraped. 
     In FIG. 4, boom hinge  310  provides boom assembly  312  a movable connection hinged to vehicle  100  and provides hydraulic control of boom assembly  312  and flat scraping assembly  200 . More particularly, boom assembly  312  has a first frame arm,  214  and a second frame arm  216  for primary support thereof. 
     By further consideration with FIG. 4, mount index cylinders  450  extend the scraping assembly  200  out and boom mass lift cylinders  470  position the scraping assembly  200 , so that the burden of weight is transferred from the front wheels  500  of vehicle  100  to the blade assembly  220 . 
     Weighted pressure scraping position  124  provides scrapping for extremely stubborn removal problems. With weight of the front wheels  500  being transferred to the blade assembly  220 , heavy weight can be put on the blade assembly  220  for scraping purposes. In the blade assembly  220  is a tractor receiving base  222 . 
     Adding FIG. 7, FIG. 8, and FIG. 9 to the consideration, on the mounting base  198  is an angled cradle grip  224  to support mounting of blade assembly  220  to the vehicle  100 . Below the angled cradle grip  224  on tractor receiving base  222 , is lower base  226 , with a pin lock aperture  196  at each end thereof, positioned at a right angle to mounting base  198 . The tractor receiving base  222  thus fits directly on to the vehicle  100  support. 
     Clearly in FIG. 7, shaft receiving cylinders  232  can be additionally supported and strengthened by buttress plates  236  being welded or otherwise secured thereto. Buttress plates  236  are also secured to mounting base  198 . Buttress bar  238  is shown as welded or otherwise secured to all of shaft receiving cylinders  232 . Clearly buttress bar  238  and buttress bar  236  can be used jointly or severally, depending on the support desired. 
     With FIG. 8, FIG. 9, and FIG. 10, mounted on the tractor receiving base  222 , at an angle between thirty (30°) degrees and forty-five (45 ) degrees relative to the floor  112 , are the shaft receiving cylinders  232 . Any one of the shaft receiving cylinder  232  receives the blade holder shaft  240  of blade assembly  220 . A blade lock pin  242  secures the blade holder shaft  240  within the shaft receiving cylinders  232 . There is a pin receiving aperture  230  in the blade holder shaft  240 . 
     The exploded view of FIG. 7 on the blade assembly  220  has blade  256  thereon. Blade  256  is longer in order for it to touch the blade face plate  246  and be supported on blade base  248  of blade assembly  220 . Clamp plate  254  holds scraping blade  256  on blade base  248 . Clamp bolts  264  fit into threaded apertures  262  in blade base  248 , in order to form an assembly to hold blade  256  in position between clamp plate  254  and blade base  248  and mount the blade  256  on vehicle  100 . 
     With the addition of FIG. 8, when plate pin  210  is rotated, it can be raised or lowered into pin receiving aperture  196  located in lower base  226 . More particularly, scraping assembly  200  has mounting base  198  secured to receiving base  222 . Receiving base  222  has an angled top edge  206  and a plate pin  210  located on each side of receiving plate  222 . Plate pin  210  cooperates with angled top edge  206  in order to secure mounting base  198  to vehicle  100 . 
     However, the pin receiving slot  260  on the shaft receiving cylinders  232  permits movement of the blade assembly  220 , along with partial rotation of the blade assembly  220  within the shaft receiving cylinders  232 . There is created an additional provision for flexibility and maneuverability of the blade assembly  220 . Blade lock pin  242  passes through pin receiving slot  260  and cooperates with pin receiving aperture  230  to secure blade assembly  220  in a selected shaft receiving cylinder  232 . 
     With pin receiving slot  260 , blade lock pin  242  is permitted to move within the confines of slot  260 . This movement permits blade assembly  220  and scraping blade  256  to have movement compensating for a rough floor  112 , and provide for more efficient scraping. 
     Referring again to FIG. 7, the rest of the blade assembly  220  extends from the blade holder shaft  240 . There is a blade face plate  252  secured perpendicular to the blade holder shaft  240 . A blade base  248  is secured perpendicular to blade face plate  252 , and thus parallel to blade holder shaft  240 . The scraping blade  256  abuts the blade face plate  252 . The clamp plate  254  for the blade  256  is bolted or otherwise secured to the blade base  248 . In this fashion, the scraping blade  256  may be mounted in blade assembly  220 , and then on vehicle  100 . 
     Adding FIG. 10 to the consideration, it is also possible to rotate the blade holder assembly  220  in a half of a circle, that is  180  degrees. This can be done by using the blade lock pin  242  as a positioning device. This permits the blade  256  to be sharpened by use. Merely rotating blade assembly  220  in a 180-degree arc permits the other side of scraping blade  256  to be used, and make blade  256  more efficient. With this free rotation, blade  256  does not need to be sharpened or replaced as frequently. The flexibility is achieved, and the desired results can be obtained. 
     With further consideration of FIG.  8  and FIG. 10, the attachment of the scraping assembly  200  to vehicle  100  includes a tractor receiving base  222  with a pin lock  212  therein. The tractor receiving base  222  receives mounting base  198  at angled top edge  206 . Pin receiving lower base  226  of mounting base  198  fits slidably over plate base  202  of tractor receiving base  222 . Blade assembly pin  218  locks blade assembly  220  thereon. 
     The pin lock  212  receiver blade assembly pin  218 , and passes behind and adjacent to the tractor base  222 . Then pin lock  212  passes into the blade front support  230  and through aperture  217  and then into indentation  196  in lower base  226 . In that fashion, the scraping blade  256  is properly secured. 
     As shown in FIG. 11, it is also possible to mount a caster wheel  300  in shaft receiving cylinders  232  instead of the blade assembly  220 . This caster wheel  300  is pinned like the blade assembly  220 . Mount index cylinder  450  extends the mounting base  198  out and boom mass lift cylinders  470  position the castor wheel  300 , so that the burden of the weight shifts from the front wheels  500  of vehicle  100  to castor wheel  300 . The castor wheel  300  permits easier movement of the vehicle  100  on delicate surfaces, for example a hardwood floor or carpeting. 
     The caster wheel  300 , which provides the caster option actually goes right in where the blade assembly  220  fits, specifically into that center of the shaft receiving cylinders  232  and shaft lock pin  242  hold the caster wheel  300  just as the blade assembly  220  is held. More particularly, the center member of shaft receiving cylinders  232  receives caster wheel  300  and permits vehicle  100  to be brought into the building. Caster wheel  300  is especially useful for traversing carpeting or marble. 
     What caster wheel  300  does is make the vehicle  100  swing easily. It does not mess up carpeting and does not cause problems. It is just for transporting vehicle  100  over surfaces that are very fragile or very sensitive. 
     In FIG. 12, the blade assembly  220  can be replaced by a grinder assembly  550 . The mounting system for the grinder assembly  550  is similar to the mounting system for the blade assembly  220 . However, the grinder base plate  558  is perpendicular to the mounting base  198 . Preferably it is supported by triangular grinding members  554  to buttress the matter and support grinding base plate  558  or grinding motors  552 . Grinding stones or members  556  are rotatably mounted in the grinding plate  558 . Hydraulic hoses  560  join grinder assembly  550  to the vehicle  100  and permit the grinding members  552  to be activated. 
     By the same token, in FIG. 13, a cutting wheel  600  can be mounted on lower base  226  instead of blade  256  and activated hydraulically in order to permit a cutting step to be carried out with this vehicle  100 . The cutting wheel assembly  600  is standard implement adapted to fit vehicle  100 . It has at least one cutting wheel  602  substantially perpendicular to lower base  226  and is mounted thereon in a standard fashion. Cutting wheel  600  may be powered hydraulically or in any other suitable fashion. 
     By combining FIG.  12  and FIG. 13, other implements besides cutting wheel  600 , grinder assembly  550 , long blade assembly  220 , and adjustable blade holder  612 , may be attached floor stripping vehicle  100 . Such implements include, but are not limited to a bucket, a scarifier, a lift fork and a bucket with a grapple hook. 
     As shown in FIG. 14, any engine is suitable. However, in view of the catalytic convertor  650  used with a diesel engine  652 , the emissions from the diesel engine  652  are reduced. In that fashion, the desired results can be obtained in a very efficient manner. Not only is the diesel engine  652  very efficient, it can be used on the concrete floors and scrape the floors extremely efficiently. 
     In FIG. 15, the bar scraping assembly  608  is a modification of the flat scraping assembly  200  of FIG.  7 . The blade base  248  of FIG. 7 includes a blade stop  610  in order to form adjustable blade holder  612 . Between the blade face plate  246  and blade stop  610  are four threaded apertures  614  set in a preferably rectangular array. Two of apertures  614  may be used to adjust for blade thickness. 
     Cooperating with the adjustable blade holder  612 , is adjustable clamp plate  616 . Adjustable clamp plate  616  includes blade stop receiver  618 . Blade stop receiver  618  is adapted to receive blade stop  610 . Adjustable clamp plate  616  also includes four bolt apertures  620 . Each of the bolt apertures  620  aligns with a threaded aperture  614 . 
     In a preferred form, two of threaded apertures  614  are adjacent to blade stop  610  and receive hold down bolts  630  in order to lock short blade  634  between adjustable clamp plate  616  and blade base  248 , and with short blade  634  being adjacent to or having contact with blade stop  610 . 
     As further preferred form, angle spacer bolts  636  are adjacent to blade face plate  246 . Angle spacer bolts  636  can either provide additional blade clamping or additional hold down blots  630 . Clamping is achieve by angle spacer bolts  636  merely contacting blade base  248  and forcing the adjustable clamp plate upwardly adjacent to the blade face plate  246  and downwardly to clamp short blade  634 . 
     Short blade  634  is advantageous due less material being required and a simplified changing procedure. Other advantages are available also. Short blade  634  and long scraping blade  256  must be formed expensive material to be durable. Less material with equal results due to blade stop  610  is a great advantage. 
     Referring now to FIG. 16, it become that large blade assembly  680  can be vehicle  100 . Large blade assembly  680  can also be support in one, two or three of shaft receiving cylinders  232  by adding the appropriate number of blade holder shaft  240 . 
     Large blade assembly  680  can have a width of 10 per cent to 150 percent of vehicle  100 . More preferably, large blade assembly  680  can have a width of 20 per cent to 125 percent of the width of vehicle  100 . Most preferable, large blade assembly  680  can have a width of 30 per cent to 105 percent of the width of vehicle  100 . Large blade assembly  680  may have a structure similar to long blade assembly  220  or bar scraping assembly as desired. 
     This application—taken as a whole with the abstract, specification, claims, and drawings being combined—provides sufficient information for a person having ordinary skill in the art to practice the invention as disclosed and claimed herein. Any measures necessary to practice this invention are well within the skill of a person having ordinary skill in this art after that person has made a careful study of this disclosure. 
     Because of this disclosure and solely because of this disclosure, modification of this method and device can become clear to a person having ordinary skill in this particular art. Such modifications are clearly covered by this disclosure.