Abstract: In a cutting head with exchangeable hard metal cutting blades for woodworking, wherein the cutting head includes a body with a center hub portion and arms extending radially therefrom and having support surfaces with cutting blades mounted thereon, the support surfaces and the cutting blades have cooperating stop means for axially and radially positioning the cutting blades on the support surfaces and clamping means are provided for firmly engaging the cutting blades with the support surfaces while they are held in contact with the stop means, and a cutting blade is mounted on each arm of the cutting head.

Abstract: A matched pair of two rotatable cutting tools (bits) is adapted to be individually chucked into a common router. Each of these two cutting tools includes a shaft with a removable nut, two or three cutters, one or two bearings, and suitable shims. A first bit has cutters shaped to remove material from the edge of a planar wooden article such as plywood that requires a finished appearance, to form a preferably rounded concave dado in the plywood edge. A second bit has cutters shaped to form a mating wood insert having a preferably rounded convex shape that matches the contour of the concave dado in the plywood edge. The mating wood insert is glued into the dado in the plywood to complete the finished edging.

Abstract: A stump cutter having a rotatable disk having a plurality of cutting tool holders with a cutting tool cantilevered therefrom to engage a stump brought into contact with the cutting tool with a protector having a massive leading non-cutting edge that extends sufficiently far outward from the rotatable disk to protect the cutting tool shank and holder from breakage and wear and also reduce whole carbide loss from large rocks to fractional carbide loss.

Abstract: An apparatus for smoothing a workpiece has a housing that is displaced relative to the workpiece in a direction and that carries a pair of augers provided with respective screwthreads having outer edges in contact with the workpiece. These augers are rotated on the housing about respective generally parallel axes transverse to the direction so as to scrape the workpiece with the screwthreads. Furthermore the augers are of such a hand and the are rotated in such a direction that the augers exert on the workpiece opposite axially directed forces.

Abstract: An improved knife holder for a chipper disc. A knife holder for holding a knife has a first clamping portion and a second clamping portion for clamping the knife therebetween. One of the clamping portions pivots about a pivot point for clamping the knife and for releasing the knife so that it may be easily removed from the knife holder. In the relative position of the clamping portions in which the knife is clamped and in their relative positions in which a space is opened up around the knife permitting its removal, the clamping portions are rigidly disposed with respect to one another.

Abstract: A free-swinging cutter for use on a machine adapted to cut and clear brush and trees, including a generally stirrup-shaped member having two opposing sidewalls, a leading face with a cutting edge for cutting, and a rearward face opposite the leading face. The cutter is adapted to be swingably mounted at a point offset from its center of mass so that the cutting edge is disposed below the rearward face to form a relief heel. The invention also includes a method of creating a relief area on a cutter swingably mounted on the rotating drum to improve chip flow, which includes the steps of providing a cutter as described above and swingably mounting the cutter to a drum about an axis offset from the cutter's center of mass so that the cutting edge is disposed below the rearward face when the cutter extends radially from the drum following the rotation of the drum.

Abstract: In a profiled inserted-blade cutter, with blades (13) which can be re-sharpened without altering the profile and trajectory, each blade (13) is secured to a blade holder (14) having a base with a T-shape cross section, one arm (16) of the transverse section of which engages in a first longitudinal groove (4) in the basic unit (2). The other arm (17) engages in a second longitudinal groove (5) also in the basic unit (2) and open towards the first groove (4). The flanks of the first and second longitudinal grooves (4, 5) at a greater distance from the central longitudinal axis of the basic unit (2) lie in planes which are mutually parallel and parallel to the longitudinal axis of the basic unit and each form a positioning surface (6, 7) for one or other arm (16, 17) of the transverse section. On the blade holder (14) there is a clamping surface (15) which encloses a radially outwardly opening angle with the frontal surface (13') of the blade (13) and an acute angle with the adjacent positioning surface (7).

Abstract: Disclosed is knives for slicers used to slice a veneer 3A which is composed of a flat base steel 1 and a flat edge steel 2 brazed to the base steel 1. The base steel 1 is formed of ferritic stainless steel including improved steel such as SUS 430 (16 Cr-18 Cr) and the edge steel 2 is formed of alloy tool steel, high speed tool steel including improved steel of SKH or a material corresponding to high speed tool steel. With this arrangement, the stain of a veneer caused by the rust of the knives can be prevented and the durability of the knives can be improved.

Abstract: A rotary cutting device suitable for stump grinding comprises a power shaft having a fixed annular flange, a segmented tool carrier removably mounted to the flange and constituted by plural segments which together form a disc. Each of the segments of the tool carrier have a hub portion and a unitary arm that extends out radially from the hub. Cutting tools are mounted to each arm and together provide a cutting tool array about the periphery of the cutting device.

Abstract: The present invention concerns a knife insert (1) for a wood-working machine, said knife insert being intended for mounting on a rotatable knife head, said knife insert having a first cutting edge (2) and a second cutting edge (3), the latter being arranged to cut obliquely to the grain of the wood stock, whereby said knife insert is adapted mountable to said knife head by its heel (4), which is the part of the insert situated closer to the center axis of the knife head than said first cutting edge (2). The first cutting edge (2) and the second cutting edge (3) are located relative to each other so that the second cutting edge (3), which cuts obliquely on the grain of stock, under all conditions hits the surface of the stock to be worked earlier than the first cutting edge (2).

Abstract: The invention concerns a cutter head, in particular a planing cutter head, whose blade carrier (1) has at least one mounting (5), facing radially outwards, for a blade (7). Fitted in each mounting (5) is a wedge grip (17) which can be moved relative to the blade carrier (1) and which presses the blade (7) against a stop (9) on the mounting (5) when moved with at least a component of motion radially outwards. Located between the blade (7) and the wedge grip (17) is a mounting strip (21) which can be moved relative to the wedge grip (17) and the stop (9) on the mounting (5) and which releases the blade (7) for removal radially outwards when the wedge grip (17) is displaced inwards.

Abstract: An arbor for a guided circular saw has three symmetrical lobes. The lobes have end regions with profiles which follow an arc centered on an axis of rotation of the arbor. The lobes have driving regions with profiles which follow the arc of a circle centered in an opposing lobe. A saw for use with the arbor has an eye with a shape which closely follows the contour of the arbor. The saw is capable of floating axially along the arbor. The saw and arbor can be used to advantage in sawing machines such as edgers. The arbor provides a much larger contact area than do prior art arbors.

Abstract: One or a plurality of machined timber elements of complimentary first and second configuration wherein each element is characterized by having at least one face surface (1,2) and one abutment surface (3,4) wherein said abutment surface incorporates in said first configuration an elongate undercut slot or female dovetail (5) and in said second configuration incorporates a correspondingly shaped, undercut elongate protuberance or male dovetail (8) and said abutment surface is not orthogonal in relation to said face surface such that said first timber element configuration and said second timber element configuration are adapted for co-operative engagement to effect the joining together of a first timber element incorporating said first timber element configuration with a second timber element incorporating said second timber element configuration whereby the undercut slot of said first timber element interengages with the protuberance of said second timber element to form a self locking joint.

Abstract: A debarking knife includes a plate having at least one sharp debarking edge delimited by a leading face and a trailing face. The leading face is reinforced by an anti-abrasion hard surface coating having better anti-abrasion qualities than the substrate forming the plate. The anti-abrasion hard surface coating is preferably a mixture of grains of fused tungsten carbide bound by an Ni/Cr/B/Si alloy, the whole being brazed to the substrate using a laser beam.

Abstract: A cutting tool having spaced elongate teeth. The tool facilitates 1) the removal of cut particles from the surface to be cut thereby enabling efficient cutting particularly of deeper holes; and, 2) the removal of the center cut out portion from the cutting tool. The tool comprises: a pilot drill bit; an anchoring disk fixed to and around a rear central portion of the drill bit; a plurality of peripherally spaced elongate teeth each having a rear end portion held in the anchoring disk, and a front end portion having a cutting edge; a sliding guide disk slidably positioned around the drill bit and in front of the anchoring disk so that the elongate teeth are radially positioned thereby; bias means to bias the sliding guide disk in a forward position; and, retention means to prevent the guide disk from sliding forwardly on the pilot drill bit beyond the cutting edges of the teeth.

Abstract: A durable male slotting blade for creating cleanly sheared slots in corrugated cardboard. The male slotting blade is adapted to be mounted to a slotter head of a cardboard box fabricating machine, and is provided with a cutting surface having first and second sets of serrations. A first set of serrations is provided on one side of the cutting surface while a second set of serrations is provided on an opposing side of the cutting surface with a valley formed therebetween. The first set of serrations are provided offset from, or out-of-phase with, the second set of serrations to provide for a cleaner cut with less frayed edges. Each of the serrations includes a peak and a valley machined not only into the sides of the cutting surface but also down into the valley formed in the cutting surface such that as the blade encounters abrasive recycled fibers, and is worn away, a new cutting surface is repetitively provided to thereby result in a longer lasting and more durable blade.

Abstract: A tractor driven stump grinder for a wheeled tractor frame having a drive motor operating the wheels to move the tractor forwardly and rearwardly, the tractor having a support member movable vertically on the tractor frame and rotatably carrying a generally vertically disposed broadsidely oriented grinder disc. A series of circumferentially spaced generally radial stump grinding tools project peripherally from each vertical face of the grinder disc, and a drive mechanism is provided for rotating the grinder disc in a plane transverse to the longitudinal tractor frame as it cuts a horizontal swath and then a subjacent swath in a pass across the upper end of a stump in both forward and rearward directions of movement of the tractor.

Abstract: The invention relates to a knife assembly for slicing woodwool, comprising a knife with a chip surface (1), a clearance surface (2) and a cutting edge (3), defined by the intersection between both surfaces. The knife assembly is characterized by guiding ribs (4) extending perpendicularly to the cutting edge (3) and joining the chip surface (1) with an end (5) that substantially coincides with the cutting edge (3) and with the guiding surface joining said end and rising there towards. The guiding ribs (4) can be formed integrally with the knife.

Abstract: The present invention provides a replaceable insert cutting tool combination. The combination comprises a cutter head having at least one peripheral transverse indentation and being rotatable about an axis, the cavity including a knife support wall at least partially transverse to the cutter head periphery, and at least one threaded bore substantially parallel to the knife support wall. The combination further comprises a knife element disposed adjacent the knife support wall and having an edge extending from the indentation, in addition to at least one threaded element for engagement in the threaded bore. At least a pair of wedging elements are mounted adjacent the knife element in engaging side-by-side relation in the indentation.

Abstract: A depth-of-cut bushing is mounted above a cutter-arm array to provide a cutting head mounted on a rotary lawn mower or mower/trimmer. The bushing is shaped so that it acts together with the cutter-arm array to accomplish control of the cutting action. This control enables chipping of stumps or roots at the low horsepowers available with lawn mowers or mower/trimmers.

Abstract: A dovetail joint jig for guiding a power tool for creating a dovetail slot in a first workpiece and a dovetail pin in a second workpiece includes a substantially flat main body portion having a slot portion on one side and a pin portion on an opposite side. The slot portion includes a pair of oppositely-disposed side projections which define a clearance space therebetween. A tapered router bit is guided along the inner edge of the side projections in order to create a dovetail slot in the first workpiece. The pin portion includes a slot-shaped portion whose planar shape coincides with the shape of the slot to be created in the first workpiece and accordingly in the preferred embodiment coincides with the shape of the tapered router bit. A generally cylindrical router bit is guided around the edge of the pin portion in order to remove material from the second workpiece and leave a dovetail pin which matches the dovetail slot in the first workpiece.

Abstract: A stump grinding apparatus having a tooth which is automatically retained with respect to, and appropriately gauged from a pocket. The tooth includes an elongated shank portion having front and rear ends and a head portion integrally extending from the front end of the shank portion. In a preferred embodiment of the present invention, a pair of longitudinally spaced holes are formed through the shank portion adjacent its rear end. A pin may be inserted through one of the two holes formed through the shank portion, with the chosen hole being dependent upon whether the shape of the pocket being used is either entirely round or partially round with a straight rear edge. When the tooth is securely clamped to the stump grinding wheel via the pocket, the pin is positioned in abutting relation to the rear end of the pocket, thereby preventing the tooth from moving axially with respect to the pocket.

Abstract: An improved circular saw blade is provided which has a plurality of dimples formed on the body of the blade by cold-working the blade. The dimples each include a circumferential ridge which extends above the surfaces of the blade's body. When a side load is applied to the work piece, the ridges contact the one of the walls defining the kerf being cut that is forced by the load against the blade, so that the surface of the blade's body is spaced from the wall. The dimples are formed by cold working the blade, which stiffens the blade, reducing the vibration of the blade during the cutting process. The dimples and their ridges also provide greater heat dissipation, and tend to provide a laminar flow of air over the surface of the blade, acting much as the dimples of a golf ball.

Abstract: A cutting head (20) is mounted on the outer end of a boom structure of a self-propelled machine, such as an excavator. The cutting head housing has a vertically oriented rotary cutter wheel (48) mounted on a side portion thereof. Side and top portions of the wheel (48) are protected by a shroud (56), which has generally conical side members (72, 80). The members (72, 80) strengthen the shroud (56), provide cutting depth control, and assist the operator in positioning the cutter wheel (48) on a stump. The wheel (48) and shroud (56) are laterally offset from a rearward projection (88) of the housing. A double heel rack (92, 94) is formed on the free outer end of the projection (88). The upper leg (92) of the rack cooperates with a thumb (28) to grip objects. The lower leg is used for stabilizing the vehicle. The rack (92, 94) also functions as a rake.

Abstract: A blade assembly for a shredding machine is presented which can be used in the method for replacing broken blades and when rebuilding the blade seat. The method includes milling the base support to reduce its height and redrilling the blade bolt holes. A new independent blade seat is then affixed by double-threaded bushings after which a new blade can then be bolted atop the blade seat.

Abstract: A rotary chipping head with multiple knife structures distributed about its periphery. Each knife structure includes an end-located chipping knife with a cutting edge movable in a plane disposed perpendicular to the axis of rotation of the chipping head. End-located facing knives are interspersed with the knife structures for producing a smooth face in the work being processed. Anvils preceding the facing knives produce compression in the work being processed. Detachable facing elements mount the facing knives and the anvils.

Abstract: A device for cutting truncated dowels from a board, with a device including a one-piece cutting body shaped as a hollow cylinder and having a concentric clamping shank. The cutting body is provided with only one recess which forms a knife edge, with the recess opening toward a front of a cutting body and merging into a wider dowel ejection opening. The cutting body has an inside annular cutting edge which determines the larger outside diameter of the truncated dowel to be cut and from which the knife edge originates. The inside circumferential surface of the jacket tapers conically toward the clamping shank, and the knife edge is inclined obliquely inwardly in accordance with the conicity of the inside circumferential surface.

Abstract: A high-speed carbide rotary cutting tool designed for use in the carving, cutting and shaping of most materials including, but not limited to, wood, ferrous and non-ferrous metals, bone, stone, plastics and composites. It is designed for use in high-speed, hand-held rotary grinders, such as flex shaft hand pieces, die grinders, and other high-speed stationary grinding tools, primarily using 1/4 inch and 1/8 inch shaft sizes. The tool includes a triangular solid carbide cutting head shaped for cutting different profiles. The cutting head is brazed to a mandrel in such a manner as to render the tool one piece.

Abstract: The object of the invention is an apparatus for clamping a chipper knife (1) to a rotatable chipper disc (4) or drum so that the back surface (6) of the knife (1) is supported against a knife clamp (2) with a knife spacer (3), and that the knife clamp (2) and knife spacer (3) are movable relative to each other by means of the clamping element (5). The knife clamp (2) is provided with supporting surfaces (11, 12) which the back surface (6) of the knife (1) is adapted to lean against by at least two spaced-apart surfaces (11', 12'). The knife spacer element (3) includes a supporting surface (13) which is adapted to subject a front surface (14) of the knife (1) to a force acting between said supporting surfaces (11, 12) of the knife clamp (2) for bending the knife (1) between said supporting surfaces (11, 12) of the knife clamp (2) towards the knife clamp (2) so as to generate a compression stress in the free section of a front surface (16) of the knife (1).

Abstract: A router bit for trimming the overhanging edge of a plastic laminate is provided having a rotatable shaft. A cutting tool is connected to the shaft and a cutting flute or wing is connected to the cutting tool. A ball-bearing guide rides along the apron of a plastic laminated top holding the cutting flute or wing in a spaced relationship to the plastic laminate. The shape of the cutting flute or wing employs two straight edges connected by a small radial section. A first straight edge is provided which lies at an angle of 5.degree. to 7.degree. with a portion of the side edge of the laminate. The second straight edge is provided which lies at an angle of 40.degree. to 60.degree. with a portion of the side edge and the top edge of the plastic laminate. The radial section, connecting the first straight edge to the second straight edge, has a small radius of curvature of 0.005 inches to 0.015 inches.

Abstract: A cutterhead for an industrial woodworking machine comprising a cutterhead body having a cylindrical outer surface with at least one insert-receiving groove extending into the body from the outer surface; at least one cutting insert secured in the groove, the insert being comprised of an insert body, a blade attachment gib, and at least one detachable blade, each blade being secured adjacent the insert body by the blade attachment gib. The upper end of the gib preferably projects above the cutterhead body and is adapted to turn chips from the blades, which project above the attachment gib. Fasteners secure the blades between the body and the attachment gib, and the insert in the groove.

Abstract: A blade arrangement for cutting dados that includes magnetic dado spacers, which firmly adhere through magnetic attraction to the dado blades, is disclosed. Also, with the blade arrangement of the present invention, problems due to blade vibrations are reduced. The cutting width is conveniently measured and adjusted without having to repeatedly install and remove the nut, since the magnetic dado spacers hold adjacent blades firmly together, before they are tightened. Additionally, the use of magnetic dado spacers reduces the possibility of the spacers falling into and becoming caught in the thread of an arbor. A further advantage is that the magnetic dado spacers are much quicker and easier to install than prior art dado spacers.

Abstract: A cutting tooth for use in a stump cutting apparatus wherein the cutting tooth comprises a mounting base and a head portion which are integral with one another and are made of a one-piece metallic forging. The forging is preferably made from AMS 4140 steel and the cutting tooth further comprises a cutting tip, preferably of tungsten carbide, which is fixedly attached to the head portion of the tooth. The disclosed preferred embodiments include those in which the head portion is disposed in a substantially straight line relationship with the mounting base and those in which the head portion is curved relative to the mounting base.

Abstract: A substantially cylindrical cutter head for cutting chips from wood. The cutter head has a body formed of disc-shaped body sections mounted in a substantially axially aligned position. Double-edged knives are mounted on the perimeter of the cutter head body, and also on the end of the cutter head body.

Abstract: A stump cutting apparatus which may be mounted on a watercraft such as a barge and includes a rotating cutting drum having multiple cutter blades and driven by at least one hydraulic motor mounted on a boom extending from the barge. In a preferred embodiment the boom is connected to a linkage arm and the rotating drum is rotatably mounted on a pair of cooperating mount plates fixedly spaced by a spacer plate and pivotally attached to the boom and linkage arm to facilitate adjustment of the rotating drum upwardly or downwardly with respect to the extending end of the boom, while maintaining the cutting drum and spacer plate in horizontally parallel relationship. A pair of arm hydraulic cylinders have their cylinder ends attached to mount brackets provided on the respective mount plates and the cylinder pistons connected to a stabilizing arm pivotally attached to the mount plates for stabilizing the cutter blade against a stump or tree during the cutting operation.

Abstract: An abrasive grinding wheel (1) is described which has a concavity (8) in the abrasive in which a metal ring (4) is embedded. The metal ring (4) is non-abrasive but is sufficiently hard to resist wear by rubbing against the material being ground. The grinding wheel (1) hence removes material only until the metal ring (4) encounters the summit of the convex shape obtained. The metal ring (4) therefore operates as a stop-rest which automatically prevents superfluous removal of material.

Abstract: A drilling/cutting machine for forming joints for accommodating metal protrusions of a metal plate connector. The machine can cut one or more joints simultaneously with a drilling/cutting bit that drills and simultaneously cuts smaller and larger width slots completing the joint.

Abstract: An apparatus for removing hardened substances such as putty or the like from a window sash without removing the window sash from its frame and without requiring a separate external guide comprises a rotary cutter member with a cutting blade and a sleeve member including a guide ledge extending forwardly from a portion of the front face of the sleeve member to engage a surface of the window sash to position the cutting blade relative to the putty holding surface of the sash in the direction perpendicular to the putty holding surface. The apparatus may further include an extension member and a stabilizing member to be used when a hardened substance is to be removed from a sash having associated with it a storm window or the like that would otherwise interfere with an electric drill or other power source and prevent the cutter blade from reaching the putty.

Abstract: The disclosure describes a cutting tool assembly for mounting unto a rotatable chip forming head. It comprises a knife holder having a base portion which is adapted to be secured peripherally to the head and a cantilevered plate portion having a lower section integral with the base portion and an upper section extending obliquely over the base portion. The cantilevered arrangement of the knife supporting plate enables the lateral ejection of chips produced from a solid piece of wood during operation so that chips do not contact successive cutting tool assemblies as the head rotates.

Abstract: In a cutting blade mounting arrangement for inserted blade cutting heads a mounting plate for supporting a cutting blade at one side thereof has at its opposite side a tooth structure for firm engagement with the cutting head and the cutting blade has ground bores receiving cylindrical fitting pins projecting from the one side of the support plate for accurately positioning the cutting blade on the support plate in axial as well as in radial direction with respect to the axis of the cutting head.

Abstract: To provide a reliable, yet resilient, seat for a cutter blade or knife (13) in a rotary milling body (11), the milling body is formed with a bore (21) which intersects the inner wall (19) of a recess (12) in the circumference of the milling body (11). A roll pin is inserted in the bore, retained therein, but projecting over the plane of the wall surface (19). The knife (13) is formed with a longitudinal groove (27), having opposite flat angled side walls (60), which fit around the projecting surface of the roll pin. A holding element (15), fitted into the recess, bears against knife and resiliently clamps it against the roll pin. Preferably, the holding element (15) and the knife (13) are formed with an interengaging projection (41) and recess (42) arrangement.

Abstract: A magnetic dado shim is a disc cut from highly flexible magnetic sheeting, and includes a central arbor hole. When the magnetic dado shim is placed concentrically on a steel dado blade, it sticks securely thereto, and will not easily shim in position. Therefore, the magnetic dado shim will not fall into the thread of an arbor and become damaged when the dado set is tightened thereon. Accordingly, the magnetic dado shim is very easy to install.

Abstract: A cutterhead, particularly for wood lathe tooling includes one or more sleeves each of which has an inner hydraulically operated circumferential gripper for securement to a rotatable arbor, and an outer, independently hydraulically operated circumferential gripper for securement to a cylinder. The outer peripheral surface of the cylinder is provided with longitudinal dovetail ribs. Knife carriers and space-filling limiters slide axially onto these ribs and are locked in place by set screws. Each carrier has a slot for radially receiving a knife to be gripped between a wedge and a corrugated keeper. The keeper and carrier slot are keyed together to provide for radial adjustment of the knife. A threaded pin restrains slot spreading and radially retains the wedge and keeper. Wedge action prevents radial throwing of elements should someone neglect to secure the carriers or limiters, or neglect to elevate the wedges.

Abstract: A free-swinging cutter element for a timber thinning machine includes a generally stirrup-shaped member having an outer wall and integral side walls. Each half of the member is formed as the frustrum of a triangle so that bevels on the upper and lower surfaces form sharp cutting edges that incline to respective upper and lower points in the center of the outer wall. This construction moves the center of mass further outward toward the outer wall to increase chipping and cutting efficiency, which is further increased by the form of the cutting edges. A single edged cutter having similar overall shape also is provided.

Abstract: A log-slabbing chipper having a chipper head that includes a power-driven rotor head and multiple double-edged knives distributed about the rotor head. A detachable wear plate for each knife extends in covering relation over a cutting edge in the knife that occupies an inoperative position. The wear plate establishes a proper depth of cut for the cutting edge of a knife that follows the wear plate.

Abstract: Apparatus for severing trees, brush, and other forestry at or below ground level in one passage of the apparatus through the forestry includes a plurality of rotatable shafts; a shaft housing for rotatably supporting the shafts with the rotational axes of the shafts juxtaposed and the first ends of the shafts about transversely aligned; a cutting bit connected at the first end of each shaft, each bit having cutting blades which overlap with the blades of the adjacent bits so that the bits cut a continuous, unbroken swath; a rotary power source connected to the shafts for rotating the shafts; a frame for supporting the shaft support; and a vertical actuator, connected between the frame and the shaft housing, for selectably adjusting the elevation of the shaft housing between an elevation at or below ground level to an elevation above ground level.

Abstract: A blade holder for a chipper having a support that is configured to accommodate chip flow. The support is scoop shaped to provide a guide surface to guide the chips through the chipper while avoiding damaging impact. The chipper blades are in two parts and fitted together in end-to-end abutment and forming a bend at their juncture. One of the blade ends is grooved to receive an end edge of the other blade whereby the juncture is overlapped for added strength and to resist wood fibers being wedged into the juncture.

Abstract: An improved chipper knife system includes reversible chipper knives having formed integrally thereon nose structures comprising a leading component of a chip breaking system. A clamp plate surface follows the nose structure and, by virtue of the nose structure taking wear, has extended life and, therefore, extended value. A simple clamp arrangement includes knife registration relative to a clamp plate and a calibration keeper bar establishes a fixed position between the clamp plate the knife holder. Knives are thereby dismounted and remounted relative to the clamp without an intermediate calibration step.

Abstract: A drill/cutting tool for making joints in wooden members for receiving a metal plate connector. The drill/cutting tool can bore a hole, and then simultaneously cut a smaller width groove and larger width groove from the hole to complete forming the joint. Also, a method of making a joint in wood members.

Abstract: A cutting tooth for use in a stump cutting apparatus wherein the cutting tooth comprises a mounting base and a head portion which are integral with one another and are made of a one-piece metallic forging. The forging is preferably made from AMS 4140 steel and the cutting tooth further comprises a cutting tip, preferably of tungsten carbide, which is fixedly attached to the head portion of the moth. The disclosed preferred embodiments include those in which the head portion is disposed in a substantially straight line relationship with the mounting base and those in which the head portion is curved relative to the mounting base.