Abstract: A rotary cutter grinder that cuts and grinds upon its circumferential surface is well suited for stump grinding and the like applications. The rotary cutter grinder is constituted by a hub portion for mounting to the power output shaft of a prime mover and plural arms unitary with the hub portion. These arms are substantially uniformly spaced about the hub portion and extend radially outwardly therefrom. A cutting tool, usually a tungsten carbide cutting tool, is mounted to each of the arms at a positive rake angle relative to the perpendicular to the direction of motion by the cutting tool.

Abstract: Saw blade for sawing metal, the saw blade having straight teeth as well as set teeth. The straight teeth extend higher than the set teeth and are chamfered on both sides such that the chamfers extend below the top edges of the set teeth. The set teeth have, on their outer side corners only, either no chamfer or a small chamfer.

Abstract: A saw tooth, of which a number are removably mounted on a tree-felling saw head, includes a body portion having a lead cutter and a trailing primary cutter separated by a throat. The combined lead cutters function to cut a narrow side wall kerf on each side of a larger principal kerf together with corresponding inside corners of the larger kerf. The remainder of the larger kerf is then cut out by the following primary cutters, forming a square cut end. As the cut progresses, the combined primary cutters separate the longitudinal fibers of the tree at the square cut end without double cutting the fibers, thereby improving cutting efficiency and reducing energy requirements in felling a tree.

Abstract: A reduced resistance saw blade. The saw blade of the present invention has at least two or more groups of sawteeth, the groups of the sawteeth include a first group having a plurality of the sawteeth wherein the tips of the sawteeth are substantially situated on a first imaginary curve which changes in a periodic or irregular cycle, and a second group having a plurality of the sawteeth wherein the tips of the sawteeth are substantially situated on a second imaginary curve parallel to the first imaginary curve. Also provided is a saw blade which includes sets of the sawteeth having reversed set patterns, thus providing a saw blade which is capable of restraining deviation of the cut, maintaining the balance of the lateral sets of the overall saw blade. The saw blade of the present invention includes a plurality of sets of teeth, each set comprising unset, right set and left set teeth, wherein reversed set patterns with the same number of teeth are provided alternately.

Abstract: A multipurpose cutting device for use with power drives is disclosed. Specific and different blade configurations are provided on opposite sides of an elongated bar or a disk type support for performing different cutting functions. By securing one side of the elongated bar or disk to the end of a shaft, one function can be performed. By securing the other opposite side of the elongated bar or disk to the shaft a different function can be performed. By securing or using the elongated bar or disk at an angle to the material being cut both blade configurations can be used simultaneously to perform yet another function. The blades on the one side and the blades on the other side of the elongated bar or disk may each have the blade configuration facing in one direction of rotation of one shape and the configuration facing in the other direction of another shape for different cutting characteristics when the direction of rotation is reversed.

Abstract: A circular saw blade is divided into a plurality of circumferential sections each including a number of cutting teeth provided along the circumferential edge of the saw blade. Between each pair of teeth, a gullet is formed having a depth in the radial direction of the blade. The distance between each pair of cutting teeth defines a pitch. The depth of the gullets and the pitch of successive teeth of the saw blade is different from one another.

Abstract: An L-shaped digging tooth includes a trapezoidally configured shank having inner and outer sides. A toe portion projects laterally from one of its edges. An angle of about 90.degree..+-.30.degree. is defined between the general plane of the toe portion and the plane of the shank. The shank and toe portion terminate in a common, continuous cutting edge of L or V-shaped configuration having a convex outer boundary and a concave inner boundary. This cutting edge intersects at a leading cutter point, a free inner edge of the toe portion which extends along a line convergent with the shank portion plane. The tooth is hard-faced over a zone adjacent the common leading edge. The invention further relates to an endless chain excavating assembly which includes the described L-shaped teeth arrayed in a specific sequence with, and geometric relationship to, cup-shaped teeth of a known type, with both secured at spaced intervals to an endless chain.

Abstract: A circular saw blade having shearing teeth and cleaving teeth in combination wherein the shearing teeth alternatively cut the fiber on opposite sides of the kerf, and the cleaving teeth separate out the sheared fiber. The saw cuts in either rotational direction.

Abstract: A saw blade such as a bandsaw blade, circular saw blade, or hacksaw blade has a leading tooth or teeth which cuts the workpiece and advances in a feed direction while the workpiece is being cut and a plurality of trailing teeth which cut the workpiece later than the leading tooth or teeth and serve to widen the leading cut channel. The leading tooth and the trailing teeth form one group in which a plurality of the trailing teeth are lesser in height than the leading tooth and an additional plurality of the trailing tooth are equal in height to the leading tooth. The trailing teeth are set in the right and left directions with respect to the saw blade and the leading tooth is unset with respect to the saw blade. The lateral set of the plurality of trailing teeth having a lesser height is wider than the lateral set of the plurality of trailing teeth having the same height as the leading tooth. Embodiments are disclosed in which a second group of teeth alternate with the basic group of teeth on the saw blade.

Abstract: A brush cutting blade having a curved slitter type/non-raker type primary cutting tooth and a preceding appendage forming a combination depth gauge and small stem slitter. The primary tooth terminates over the blade body with the cutting edge provided by that curved portion of the tooth between its most lateral point and the point of termination over the blade body. The cutting edge is curved but outwardly directed in a slitter configuration throughout its length. The lateral point of the cutting edge determines the kerf width to prevent binding. The slitter cutting edge of the appendage is hook shaped to cut small willowy-type stems and the appendage has an upper inclined guide edge that guides the larger rigid-type stems into the primary cutting tooth. The uppermost point of this guide edge of the appendage provides a depth gauge for the primary cutting tooth.

Abstract: A radial saw blade is formed of a flat disc having peripheral edge including circular peripheral portions and recessed stepped peripheral portions. The peripheral edge includes spaced apart, radially inwardly extending notches. Each notch has a flat, plate-like insert brazed to an L-shaped seat in the notch facing the direction of rotation. Each insert has cutting edges formed on side edges of the inserts which extend axially from both sides of the disc and on a crown edge extending radially from the peripheral edge of the disc. The side and crown edges each have beveled surfaces extending away from the direction of rotation to define a relief angle. A first set of the notches are positioned about the circular peripheral portion of the peripheral edge. The inserts in the first set of notches make the primary cut in both linear and non-linear passes.

Abstract: A saw blade such as a bandsaw blade, circular saw blade, or backsaw blade has a leading tooth or teeth which cuts the workpiece and advances in a feed direction while the workpiece is being cut and a plurality of trailing teeth which cut the workpiece later than the leading tooth or teeth and serve to widen the leading cut channel. The leading tooth and the trailing teeth form one group in which the heights of the trailing teeth from a basic position on the saw blade are smaller than the height of the leading tooth. The trailing teeth are set in the right and left directions with respect to the saw blade and the leading tooth is unset with respect to the saw blade. Several embodiments are disclosed in which the saw blade has 3,4,5,6,7,8,9, etc., up to 12 teeth.

Abstract: In order to stress relieve exposed portions of plastic welds, and thereby reduce susceptibility of such welds to solvent-induced crazing and cracking, the welded parts are formed with flanges extending outwardly therefrom. These flanges are at least partially joined during welding, their adjoining surfaces providing at least a portion of the welded joint. After welding, the flanges are compressed in a direction transverse to their adjoining welded surfaces, the compression being of sufficient magnitude to exceed the yield strength of the flanges, thereby relieving stresses in the exposed portion of the welds. The flanges may be sheared, as by a blade which provides both transverse compressive forces and compressive forces in the direction of the adjoining welded surfaces. The flanges may be sheared through, so as to enable the sheared off end to be removed, or the shearing may penetrate only through the weld zone, providing a notch, but leaving the flanges in place.

Abstract: A saw blade exhibits a foundation (1) of spring steel, which exhibits along one edge projections (3), each separated by a chip space (2), each carrying a seat (4) each for a cutting material plate (6, 6') and each forming a tooth back (5). The cutting material plates (6, 6') exhibit a cutting edge and a true rake (7) and are arranged at an effective rake angle (.gamma.), while each two adjacent cutting material plates (6, 6') form a pitch (t) with the mutual interval of their cutting edges and/or cutting tips. The cutting material plates (6, 6') are attached with varying pitch (t) and with varying effective rake angle (.gamma.).

Abstract: A carbide tipped saw for cutting non-ferrous industrial metals, capable of use on a low-rpm metal sawing machine designed for saws with high-speed steel teeth, has higher hogger teeth alternating around its periphery with lower raker teeth. Each hogger has a cutting edge that is parallel to the saw axis and extends across more than half of the kerf width, defined by the junction of a positively raked front surface with a top surface. Oblique front edges on the hogger are defined by junctions of the front surface with oblique surfaces that lie between the top and side surfaces and face radially and axially outwardly. Each raker removes only side portions of the kerf and has swept-back cutting edges defined by the junctions of its top surface with chamfer surfaces that are negatively raked and face obliquely forwardly and axially outwardly.

Abstract: A blade for a reciprocating saw having a cutting edge comprising a plurality of longitudinally aligned teeth, the improvement comprising the teeth having a negative rake angle near the leading end of the blade for reducing needed force for cutting at the beginning of a stroke, and a positive rake angle near the trailing end of the blade for increasing the force necessary for cutting to decelerate the saw during or at the of the stroke, whereby cutting actions are related to expected blade speed at any given point on the saw and relatively constant muscular effort is required over the length of a stroke.

Abstract: A circular saw of improved vibration characteristics in which the saw teeth are arranged in an odd number plurality of segments and wherein each segment includes a relatively rigid zone and a relatively flexible zone obtained by varying tooth spacing. Also, the tooth-to-tooth spacing is preferably randomly varied to reduce harmonic vibration.

Abstract: A saw blade has teeth formed with cutting edges which are inclined relative to the side surfaces and which extend only partly across the blade width, the cutting edges of successive ones of the teeth extending transversely inwardly from opposite side surfaces of the blade.

Abstract: A cup-shaped wheel having an abrasive rim is employed to grind the teeth of a circular saw to an improved contour. Only point or edge contact takes place between the abrasive rim and the tooth. This technique is preferably utilized in conjunction with triple-chip type circular saws of the sort used to cut metals such as steel. The contour imparted to the cutting surface of the tooth comprises a section of an elliptical cylinder and exhibits improved steel cutting characteristics when compared to prior art multi-faceted saw teeth. Since only edge contact takes place between the abrasive rim and the tooth, the wheel is essentially self-dressing.

Abstract: A domestic or tradesman's knife is provided with cutting teeth ground off alternately on opposite sides to form a cutting edge on each side of the blade in the manner of the teeth of a saw, the invention consisting in the provision of cutting teeth intermediately between the two rows of cutting teeth on the sides of the blade.

Abstract: A circular saw is made with carbide-tipped teeth arranged in pairs to effect a so-called "triple-chip" cutting operation for thermoplastic materials. Both teeth of each operational pair have two negatively-raked cutting edges which slope toward each other at the outer extremity of the teeth to a transverse radially outermost cutting edge. The so-called "high" tooth of each pair has its transverse cutting edge radially offset a greater distance from the rotational axis of the saw than the corresponding transverse edge of each low tooth. The lateral negatively-raked cutting edges of each low tooth are laterally separated a greater distance than the corresponding sloping cutting edges of the high tooth. Saws of this character are specially useful for cutting plastic materials and particularly materials such as acrylics and vinyls.

Abstract: A saw, especially for sawing wood, in which a support disc is provided with peripheral recesses with cutting teeth formed on the forwardly facing rearward sides of the recesses and which teeth may be in the form of hard wear resistant inserts. The cutting teeth are so designed that the kerf taken by the saw as it advances into the saw cut is spaced on both sides from the saw blade and also from the sides of the aforementioned cutting teeth radially inwardly from the tip ends thereof. The teeth are formed to present a positive cutting rake in all directions to the wood and shear the wood fibers off cleanly at the radially outer tip ends of the cutting teeth.