Abstract: A cutting platform for supporting a cutter adjacent a concrete pad and a method of making clean cuts into the pad is disclosed. The platform includes a base having an upper surface positioned so that it is level with an upper surface of the pad. The cutter is received on the base's upper surface and is rollable onto the pad's upper surface. One or more support legs extend downwardly from a lower surface of the base and are adjustable in length. At least one arm extends outwardly from the base and rests on the pad's upper surface. A replaceable insert is received in a recess in the first end of the base adjacent the pad. The cutter's blade is actuated and cuts initially into the insert. As the cutter rolls from the base onto the pad, a clean cut is made into the side and upper surface of the pad.

Abstract: A method and a plant are provided for calibrating surfaces of stone materials, suitable for working at least one slab (1) composed of an entry side and an exit side and of two parallel side edges; the slab (1) is pushed along the side edges through a conveyor belt and is subjected to the cutting action imparted by multiple tools equipped with a peripheral speed compatible with optimum cutting parameters for the stone material; the tools move along a predefined path along the surface of the slab (1), and the motion imparted by the conveyor belt and the predefined tool path is combined in order to completely cover the surface of the slab (1); the contact between the slab (1) and the tools is ensured simultaneously at least in one point on each of the two side edges of the slab (1).

Abstract: A device for processing a slab of stone or stone-like material, includes a support table, adapted for receiving the slab, and a fixed guide rail running in a first direction along a side of the support table. The device further includes an arm, extending in a cantilevered manner, in a second direction from the guide rail and across at least a portion of the support table. The arm is displaceable relative the guide rail in a third direction. A method for processing a slab of stone or stone-like material is also disclosed.

Abstract: A method and a plant are provided for calibrating surfaces of stone materials, suitable for working at least one slab (1) composed of an entry side and an exit side and of two parallel side edges; the slab (1) is pushed along the side edges through a conveyor belt and is subjected to the cutting action imparted by multiple tools equipped with a peripheral speed compatible with optimum cutting parameters for the stone material; the tools move along a predefined path along the surface of the slab (1), and the motion imparted by the conveyor belt and the predefined tool path is combined in order to completely cover the surface of the slab (1); the contact between the slab (1) and the tools is ensured simultaneously at least in one point on each of the two side edges of the slab (1).

Abstract: A device (1) for processing a slab of stone or stone-like material, comprises a support table (2), adapted for receiving slab, and a fixed guide rail (3) running in a first direction (X) along a side of the support table. The device further comprises an arm (4), extending in a cantilevered manner, in a second direction (Y) from the guide rail and across at least a portion of the support table. The arm is displaceable relative the guide rail in a third direction (Z). A method for processing a slab of stone or stone-like material is also disclosed.

Abstract: The instant invention relates to power tools. More specifically, the instant invention is a portable device for shaping, contouring and polishing the edge of a workpiece consisting of a hard material. The device includes a guide-way constructed and arranged to attach directly to the upper surface of the workpiece. A carriage is slidably supported on the guide-way for movement along the length thereof. Secured to the carriage is a motor for rotation of a rotary tool. A pneumatic cylinder is provided to force the rotary tool into the workpiece with a predetermined pressure along a predetermined axis of approach. The carriage is constructed and arranged for vertical positioning and angular rotation of the rotary tool.

Abstract: A handheld and readily maneuverable apparatus for grinding floor surfaces and/or cutting grooves in a floor formed of a hard material such as concrete, stone or the like is disclosed. The apparatus includes an elongated tube having a motor mounted at its upper end and a special rotatable abrasive head at its lower end. Rotation of the motor is coupled to the rotatable abrasive head via a flexible shaft that extends longitudinally through the elongated tube. In one form of the invention, the abrasive head includes a grinding disk that is oriented generally horizontally relative to the floor when the apparatus is in its operating orientation, and the operator can manually maneuver the apparatus so as to grind the floor surface.

Abstract: A grinding wheel that can rotate at high speed to grind flat plates comprised of a thin conical grindstone fastened to the open end of a rotatable inverted cup, with the grinding edge projecting outwardly from and at an inclined angle with respect to the open end. The grindstone includes a cylindrical fitting part which is fastened to the inside of the cup and a conical grinding part formed by electroplating from a nickel plating solution in which super hard abrasive grains are dispersed. The grindstone can also be prepared by electrodepositing abrasive grains directly onto a flange formed at the open end of the cup.

Abstract: A power cutting tool having a body, a base for supporting the body, and a housing provided at the front end of the body, comprises a substantially saucer-shaped rotary cutter rotatably supported within and by the housing and having a cutting face substantially on the same level as the bottom of the base; a guide roller disposed in front of the housing and adapted to roll on a workpiece surface, which guide roller being vertically movable with respect to said body so as to control the depth of cut of the rotary cutter; a movable cover fitted to the lowermost end of the housing and adapted to annularly enclose the rotary cutter and to cover the workpiece surface so as to define a cutting chamber which in turn is defined into an inside chamber and an outside chamber by the rotary cutter; and a plurality of communicating ports provided on the rotary cutter and adapted to communicate the inside chamber and the outside chamber therethrough.

Abstract: A slicing cutter blade, adapted for securing to a holder having a tension ring provided with a protuberance thereon, which comprises an annular sheet steel body rolled in a predetermined direction. The annular sheet steel body includes a cutting edge formed at the inner circumferential edge of a central opening in the annular body, an outer circumferential portion secured to the holder and a tension generating portion adjacent the outer circumferential portion which is forced into contact with the protuberance on the tension ring. A middle portion located between the cutting edge and the tension generating section is provided with a plurality of circumferentially arranged circular apertures. Two of these apertures having a first diameter are located on a first line parallel to the predetermined direction and two apertures of smaller diameter are located on a second line perpendicular to the first line.

Abstract: A shaft carries helically wound support surfaces for retaining cutter segments, such as diamond cutters, in a helical path. Oppositely wound helices extend continuously from the center to a limit position on each side of the cutter head. Each of the support surfaces is disposed in a direction substantially perpendicular to an extended surface to be cut or planed so as to provide a cut in the extended surface with a minimal force and without any side skipping of the cutter segments. Double wound helices provide a backup segment in the same plane and a natural balancing effect. Each of the helices in each double wound helix is uniformly spaced from the other double wound helix and is terminated at the same position at the center and at the limit position as the other helix but may be angularly displaced from the other helix by an angle of 90.degree. at the center and 180.degree. at the limit position. The cutter segments may be disposed on the helices in a balanced relationship.

Abstract: An apparatus for cutting material or grooving concrete has a housing including a curved top for partially accommodating one or more circular saw blades. The housing has a bottom having an opening permitting partial protrusion of the saw blade into cutting engagement with the material or concrete to be cut or grooved. For manual propulsion of the housing along such material or concrete, a curved handle is located on the housing top and has identically dimensioned first and second handle portions extending in parallel to the partially accommodated and protruding saw blade or blades in opposite directions from a central location on the housing top situated opposite the mentioned bottom. The partially accommodated and protruding saw blade is rotated and the housing including the mentioned bottom is maintained in spaced relationship to the material to be cut or concrete to be grooved during operation of the saw blade or blades.

Abstract: A step groover apparatus has a housing to which a direct drive means is attached. The drive means has a rotatable shaft extending into the interior of the housing and on which a plurality of grooving blades are fixed in space relationship. The blades extend through an opening in a lower portion of the housing. The housing has front and rear skids on which the apparatus slides as it moves along the top of the step. The skids are vertically adjustable to vary the depth of the groove to be cut in the step. A vertically and horizontally adjustable face guide is adapted to be forced against the face of the step so that the grooves will be parallel to the step face. A radially extending handle is attached to the housing so that the rear skid may be pressed downward against the top of the step. A laterally extending handle is attached to the housing so that the front skid and the face guide may be simultaneously pressed against the top and face of the step, respectively.