Abstract: A method of creating an arbor mounting hole in a blade. The arbor mounting hole is created by making a first model of an arbor mounting hole that fits onto the asymmetrical mounting arbor. The first model has a first long flat edge and a first center of rotation. A mirror image of the first model is used to create a second model. The second model has a second long flat edge and a second center of rotation. The first model and the second model are superimposed so that the first center of rotation aligns with the second center of rotation and the first long flat edge aligns with the second long flat edge. The superimposition creates a compound model. A symmetric arbor model is formed about the compound model. The symmetric arbor model is cut into the blade.

Abstract: A method of cutting grooves having a trapezoidal profile into an airport runway. Each of the grooves has a base of a first width, an open top of a second width and sloped sidewalls. The grooves are cut by the single pass of a rotating blade. The blade used to cut the trapezoidal shaped grooves has a plurality of cutting teeth. Each of the cutting teeth has a wide body section, a face surface, a bottom surface and side surfaces that extend from the face surface to the wide body section. The wide body section has a width equal to the maximum width of the groove being cut. However, the face surface has a width equal to the minimum width of the groove being cut. The result is a cutting tooth that cuts smoothly and maintains its trapezoidal shape as it wears.

Abstract: A cutting tooth element for a cutting blade. The cutting tooth element has a body. The body has a forward surface, a rearward surface and a peripheral edge surface that extends from the forward surface to the rearward surface. The peripheral edge surface has a constant width that is equal to the width at the bottom of the groove that is to be cut. The body of each cutting tooth has a thickened area between its forward surface and rearward surface. The thickened area has a maximum width equal to the width at the top of the groove that is to be cut. The body has sloped side surfaces that extend from the thickened area to the forward surface, rearward surface and the peripheral edge surface. The resulting shape of the cutting tooth causes the cutting tooth to retain its cutting profile as it wears.

Abstract: A repair assembly for the skid plate of a circular saw and its associated method of repair. If a circular saw has a skid plate that is worn to a point where it needs replacement, this repair assembly is used to reinforce the worn skid plate so it can again be used. The repair assembly includes a flat plate structure having a sort extension and a long extension protruding from different sides. The long extension and the short extension mount directly onto the worn skid plate. The flat plate structure therefore covers the wear surfaces of the worn skid plate, therein providing new wear surfaces. The repair assembly attached over the worn skid plate so the worn skid plate does not have to be removed.

Abstract: A method of forming a rotating blade for a cutting machine that can attach to either symmetrical arbors or asymmetrical arbors. The arbor mounting hole has five sides arranged in a cut gem configuration. The arbor mounting hole is symmetrical on either side of a mid-line. However, the mid-line of the arbor mounting hole need not pass through the geometric center of the blade. Inserts are provided. The inserts fit into the arbor mounting hole. Each of the inserts defines an aperture for receiving a drive arbor of a different configuration. The apertures are off-set in the inserts, to compensate for the off-set arbor mounting hole, so that the apertures are disposed at the geometric center of the blade when any insert is placed in the arbor mounting hole.

Abstract: A cutting machine for cutting material from a crack that is present in a paved surface. The cutting machine has a circular cutting blade. The cutting blade has an axis of rotation and a mid-axis that is perpendicular to the axis of rotation. A wheeled platform is provided having wheels that are configured and oriented to cause the wheeled platform to turn about a predetermined point when the wheeled platform turns. A mounting arbor is supported under the wheeled platform. The mounting arbor retains the circular cutting blade in a position where its mid-axis generally aligns with the predetermined point around which the wheeled platform turns. The mid-axis of the cutting blade therefore remains in a fixed position when the wheeled platform is turned in a new direction. This allows the cutting blade to remain within the paved surface.

Abstract: A repair assembly for the skid plate of a circular saw and its associated method of repair. If a circular saw has a skid plate that is worn to a point where it needs replacement, this repair assembly is used to reinforce the worn skid plate so it can again be used. The repair assembly includes a secondary plate structure having a flat base. The secondary plate structure is mounted directly onto the worn skid plate. The secondary skid plate covers the wear surfaces of the worn skid plate, therein providing new wear surfaces. The repair assembly attached over the worn skid plate so the worn skid plate does not have to be removed.

Abstract: A method of forming a rotating blade for a cutting machine that can attach to either symmetrical arbors or asymmetrical arbors. The arbor mounting hole has five sides arranged in a cut gem configuration. The arbor mounting hole is symmetrical on either side of a mid-line. However, the mid-line of the arbor mounting hole need not pass through the geometric center of the blade. Inserts are provided. The inserts fit into the arbor mounting hole. Each of the inserts defines an aperture for receiving a drive arbor of a different configuration. The apertures are off-set in the inserts, to compensate for the off-set arbor mounting hole, so that the apertures are disposed at the geometric center of the blade when any insert is placed in the arbor mounting hole.

Abstract: A rotating blade for a cutting machine having a new arbor mounting hole. The arbor mounting hole has five sides arranged in a cut gem configuration. The arbor mounting hole is symmetrical on either side of a mid-line. However, the mid-line of the arbor mounting hole need not pass through the geometric center of the blade. Inserts are provided. The inserts fit into the arbor mounting hole. Each of the inserts defines an aperture for receiving a drive arbor of a different configuration. The apertures are off-set in the inserts, to compensate for the off-set arbor mounting hole, so that the apertures are disposed at the geometric center of the blade when any insert is placed in the arbor mounting hole.

Abstract: An apparatus for cutting concrete is provided and includes a frame having a plurality of support wheels located thereon. A prime mover assembly is connected to the frame, and a concrete cutting blade is drivingly connected to the prime mover. The blade is mounted for generally upward and downward movement relative to the frame for engaging and disengaging from a surface to be cut. A carriage having an anti-spalling roller mounted thereon is connected to the frame such that the carriage positions a surface contact portion of the anti-spalling roller in alignment with a blade exit location for an operative range of cutting depths.

Abstract: A self-propelled saw for cutting green or uncured concrete having a frame with rear drive wheels and adjustable front wheels is provided. The saw has a handle for guiding it along the desired path to be cut in the concrete and a drive motor for the saw blade and the rear wheels mounted on the frame. Motor or pump driven means interconnecting the handle and front wheels raise and lower the front wheels at the control of the operator to remove or insert the saw blade into the concrete to be cut. A track assembly, including a pair of parallel tracks moves with the frame as the saw blade is inserted into the concrete and the tracks engage and roll along the surface of the concrete to support the surf ace adjacent the saw blade as the concrete is being cut.

Abstract: A saw blade having a central aperture for mounting on an arbor of a concrete cutting machine is disclosed with the arbor having a raised mounting boss corresponding in shape and size to the central mounting aperture of the saw blade. The central mounting aperture of the saw blade is triangular in shape with one apex of the triangle overlying the perimeter of the arbor and the other two apexes of the triangle within the face of the arbor.

Abstract: A contoured cutting element for cutting a contoured groove, i.e. other than square or rectangular, in a substrate of plastic, metal, concrete, asphalt, macadam, stone or the like has a cutting surface whose length, in the direction of cutting of the element is directly proportional to the amount of material that portion of the cutting surface must remove to provide uniform wear on the cutting surface over long periods of usage.