| Concrete polishing system -> Monitor Keywords |
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  Concrete polishing systemRelated Patent Categories: Abrading, Frame Or Mount, Portable Abrader, Floor Surfacing MachineThe Patent Description & Claims data below is from USPTO Patent Application 20060025059. Brief Patent Description - Full Patent Description - Patent Application Claims
CROSS-REFERENCE TO RELATED APPLICATIONS [0001] The present application is a continuation in part application of U.S. patent application Ser. No. 10/900,786 filed Jul. 28, 2004 which is pending. BACKGROUND OF THE INVENTION [0002] The present invention is related to a system for polishing concrete. More particularly, the present invention is related to a system, and method, for polishing concrete without the typical problems of uneven polishing in the valleys and hills of poured concrete. [0003] Polishing concrete has been known for some time. The abrasive units of floor grinding machines are typically rigidly attached to the drive mechanism of the machine thus allowing the abrasive units to operate in a single plane. Despite the most skilled of floor finishers concrete floors are not perfectly flat. A typical technique for polishing concrete will be described with reference to FIG. 1. [0004] In FIG. 1, the concrete floor, 1, is uneven with valleys, 2, and hills, 3. The concrete floor, 1, is polished by rotating and translating a plate, 5, with abrasive units, 4, rigidly attached thereto. As the plate is rotated and translated the abrasive units grind away concrete to remove rough portions. As can be seen from the illustration of FIG. 1, the valleys, 2, do not readily come into contact with the abrasive unit and therefore are not polished. This leaves an unsightly floor with portions polished and other portions rough. To avoid this, the operator typically starts with a very course abrasive unit with the desire being to decrease the height of the hills, 3, till they are even with the valleys, 2. Less course abrasive units are then used to finish polish the floor. This method has several disadvantages. [0005] Course abrasive units remove a substantial amount of concrete to eliminate any hills. Often this exposes aggregate, or rock filler, in the concrete. As the polishing continues those areas that were originally in a valley are not polished or grinded to the same degree and the aggregate is therefore not exposed. The end result is a floor with some portions having exposed aggregate and other portions not having exposed aggregate. This is unsightly. [0006] Yet another problem with the prior art is the high cost associated with time and material for the polishing or grinding process. Multiple polishing operations are required with each using successively less course abrasive units. The multiple operations are time consuming. The course abrasive units typically create scratches, or gouges, in the concrete which must be removed with the less course abrasive unit. In many instances the final floor still has scratches and gouges since it is very difficult to remove them all with the time and resources typically allotted for such an operation. [0007] Yet another problem is the loss of abrasive units due to breakage. As the abrasive unit crosses a valley and reengages with a hill it is not uncommon for parts of the abrasive unit to become dislodged or broken. This damage greatly decreases the useful lifetime of abrasive units. [0008] There has been a long felt desire for a floor polishing system which can effectively polish a floor without regard for hills and valleys and the differential grinding required to polish both. SUMMARY OF THE INVENTION [0009] It is an object of the present invention to provide a flexible mounting of the abrasive unit that will allow for finishing of concrete floors without the need to grind the high spots to a lower level. [0010] It is another object to provide an abrasive unit, and holder, which can be attached to a conventional plate. The method of attachment allows the holder to "float" or move in a vertical direction thereby allowing the abrasive unit to contact the floor at all times and everywhere. [0011] A particular feature of the present invention is that the high spots, or hills, do not have to be ground down to the level of the low spots, or valleys, thereby achieving a uniform appearance which is aesthetically pleasing. [0012] Another particular advantage is a substantial savings in time and labor. Larger floor areas can be completed in a given time period. [0013] Yet another advantage is the increased longevity of the improved abrasive units. [0014] Yet another advantage is the elimination of multiple passes with successively decreasing coarseness. This advantage is due to the elimination of the necessity to decrease the height variations in the floor. A concrete floor can be rendered smooth and aesthetically pleasing in a single pass with a low coarseness abrasive unit. [0015] These and other advantages, as will be realized, are provided in a floor polisher with a rotating plate, a multiplicity of variable vertical displacement mounting devices attached to and plate, and an abrasive unit attached to each vertical displacement mounting device. [0016] Yet another embodiment is provided in an abrasive unit particularly adaptable for use with a floor polisher. The abrasive unit has a cylindrical abrasive head and a frustoconical mounting head. [0017] Yet another embodiment is provided in a floor polisher with a rotating plate, a multiplicity of variable vertical displacement mounting devices attached to the plate and an abrasive unit attached to each vertical displacement mounting device. In the improvement the abrasive unit has a cylindrical abrasive head and a frustoconical mounting head. [0018] Yet another embodiment is provided in a floor polished with a rotating plate, a multiplicity of leaf springs attached to the plate and an abrasive unit attached to each leaf spring. BRIEF DESCRIPTION OF THE DRAWINGS [0019] FIG. 1 is an illustration of the prior art with fixed abrasive units. [0020] FIG. 2 is a partial cutaway view of a floor polisher. Continue reading... Full patent description for Concrete polishing system Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Concrete polishing system patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. 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