Abstract: A cutting bit useful for cutting various earth strata and the cutting insert, which may be made from a polycrystalline diamond composite, for such a cutting bit. The cutting bit has at least one pocket at the axially forward end thereof which receives its corresponding cutting insert. The cutting insert has at least one exposed cutting edge which is of an arcuate shape.

Abstract: An agricultural tool including a disc blade incorporating hard wear resistant inserts for attachment to an axial member of an agricultural tool for rotation through the soil. The disc blade includes parallel spaced flat round front and rear surfaces having a central cylindrical opening. The front surface tapers radially outwardly to the rear surface thereby defining a common outer rim having a knife edge. A plurality of notches are spaced circumferentially along the front surface of the disc blade and inwardly from the outer edge of the front surface of the disc blade. The notches are configured to receive a plurality of hard wear resistant inserts to provide improved wear resistance.

Abstract: A seed boot for depositing a seed within a furrow including spaced side members, a face plate extending between forward edges of the side members, and a rear spacer member extending between rearward edges of the side members, and a wear insert secured to each of the side members of the seed boot. The insert includes an elongated rectangular bar having a top and bottom surface, a leading and trailing face and longitudinal side faces extending between and around the peripheral edges of the top and bottom surfaces.

Abstract: A self-sharpening pyramidal shaped insert of a refractory hard metal for use as a leading penetrating element of a soil opener member of an agricultural tool. The insert includes a boss member of a generally frustoconical shape including a circular bottom and outwardly curved side surface extending upwardly from the circular bottom and terminating in a flange, and a penetrating tip having four nonparallel triangular sides, each triangular side having a common leg with a bordering triangular side and a third leg contiguous the flange. The triangular sides converge to a common vertex. The insert inhibits wear of the agricultural tool and contributes to proper soil flow as the agricultural tool cuts a slice in the soil.

Abstract: A cutting insert and a wear insert for use in an agricultural tool having a cutting edge for forming a furrow. The agricultural tool includes an essentially syncline shaped slicer having a leading member, a trailing member and a pair of sides tapered from the trailing member toward a sharp convex cutting edge extending longitudinally upwardly and forwardly from the trailing member toward the leading member. A leading deflector extends upwardly and forwardly from the cutting edge and is formed integral the slicer by a mounting web. The mounting web includes a pair of sides extending rearwardly from the leading deflector and expanding to a heel having first and second sides adjoining respective sides of the syncline shaped slicer and a rear portion. Each of the first and second sides having formed therein a notch and having affixed thereto a wear insert. A cutting insert is secured within a slot along the cutting edge.

Abstract: An agricultural tool including a disc blade incorporating hard wear resistant inserts for attachment to an axial member of an agricultural tool for rotation through the soil. The disc blade includes parallel spaced flat round front and rear surfaces having a central cylindrical opening. The front surface tapers radially outwardly to the rear surface thereby defining a common outer rim having a knife edge. A plurality of notches are spaced circumferentially along the front surface of the disc blade and inwardly from the outer edge of the front surface of the disc blade. The notches are configured to receive a plurality of hard wear resistant inserts to provide improved wear resistance.

Abstract: An insert for use in an agricultural tool having a cutting edge for forming a furrow. The insert includes an elongated wedge having a leading end, a trailing end, a top surface, a first side surface and a second opposing side surface coterminous therewith defining a longitudinally extending lowermost edge. The first and second side surface converge from the trailing end to the leading end and diverge from the lowermost edge to the top surface to form a v-shape leading end. In a preferred embodiment the insert includes a means for aligning the lowermost edge of the insert with the cutting edge of the tool.

Abstract: A rotatable cutting tool for impacting and fragmenting a substrate. The tool has a tool body containing a valve seat in the forward end thereof wherein a hard insert affixes to the tool body within the valve seat. The hard insert comprises an integral tip segment and an integral axially rearward segment joined to the tip segment by an integral mediate segment. A trio of generally vertically disposed flanges project radially outward from the mediate segment. The flanges are integral with the mediate portion. Each flange presents at least one side surface. During operation, the substrate fragments impinge against the side surface to urge the tool to rotate about its central longitudinal axis.

Abstract: A block and locking mechanism and cutter bit for a stump grinding machine. The block having a shank receiving cavity being defined by a surrounding irregularly shaped inner wall that includes a pair of opposed end walls interconnected by a pair of opposed side walls with each side wall being tapered inwardly from the opposed end walls such that the cavity has a varying width from end wall to end wall. The cutter bit including a shank adapted to be received within the cavity of the block with the shank having a cross-section that generally conforms to the shape of the cavity such that the cutter bit is prevented from rotating when inserted within the cavity and held within the block.

Abstract: An excavating tooth for use in connection with an earth drilling auger includes a main body portion terminating in a working end and a shank extending upwardly from the main body portion. A plurality of tungsten carbide inserts are embedded in the working end of the tooth and project outwardly therefrom. During drilling operations, the carbide inserts engage the earth and chisel away rock and other material which is subsequently conveyed to the surface by the fight structure of the auger. The inserts are inclined forwardly with respect to the plane of the shank to enable the inserts to withstand greater loads than before. In the preferred embodiment, the insert has a generally cylindrical proximal end embedded in the working end of the auger tooth and a distal end including forward and rearward inclined surfaces terminating in a transverse cutting edge.

Abstract: A grader blade has a steel body with a bottom edge incorporating a substrate of air-hardened tool steel casting material assembling a preformed cemented carbide insert in tiered relationship with, and rearwardly of, a casted layer of carbide grit. The front casted carbide grit layer is formed in the casting operation and the rear preformed cemented carbide insert is arranged in the tiered contacting and attached relationship with the carbide grit layer as the latter is casted with the substrate of special steel casting that holds the insert and layer together. The steel body of the blade also includes a recess formed in and along the forward portion of the blade bottom edge into which the casted asembly is disposed and welded to the blade.