Abstract: A planing head, cylindrical body for a planing head and a method of manufacture thereof are provided. The planing head includes a cylindrical body having an axis of rotation, an outer surface around the axis of rotation, and opposite first and second end faces. A plurality of blade assemblies is arranged along the outer surface. A plurality of grooves is provided in the outer surface and each groove is configured to receive a respective one of the plurality of blade assemblies. A hydraulic pressure system for supplying a hydraulic pressure to each of the blade assemblies is provided. The hydraulic pressure system includes a plurality of transverse channels for receiving a pressurised hydraulic fluid and a plurality of oblique channels hydraulically linking the plurality of transverse channels. Each transverse channel extends at least partially through the cylindrical body.

Abstract: The present invention discloses a fixation structure for a blade body of a planing cutter, wherein the planing cutter comprises a cutter body, a blade body, and a plurality of screw connectors. The cutter body is provided on its outer peripheral surface with a cutter seat used for mounting the blade body on which a blade of hard alloy is welded, a cooperating and positioning structure is provided between the joint surfaces of the blade body and the cutter seat, and the blade body is directly threadedly connected on the mounting seat of the cutter body through a plurality of screw connectors. Such fixation structure is simple and the replacement of the blade body is convenient, and is adapted for flat planing cutters and spiral planing cutters.

Abstract: A stump grinding apparatus having a split cutting wheel includes several replaceable cutter blocks secured to the periphery of the wheel. One or more replacement teeth are removably anchored in holes in each block and may also be mounted on holes in the side of the split wheel as well. The teeth are typically provided with a hardened cutting face, and are reinforced with an extension projecting back from the face. Each tooth includes a shank which fits into one of the holes. The shank contains a groove which receives a spring clip or a spring pin for securing the tooth in the hole. The wheel periphery contains individual recesses that are shaped to receive the cutter blocks. Each block includes means for insuring alignment of the block in the corresponding recess. The block is wedged tightly into its recess to reduce the likelihood of accidental removal.

Abstract: A cutterhead for use with a power tool includes a generally cylindrical body with a knife recess extending generally parallel to an axis of the body. The knife recess has a wall at an acute angle to a tangent of the outer surface. Received in the knife recess are a knife and a bar that includes an angled side configured to sandwich the knife between the angled wall of the recess and the angled side of the bar. A pin extends from the bar and is received in an aperture of the knife to align the knife relative to the bar. A threaded height adjustment screw is received in a threaded bore in the bar to adjust a height of the knife with respect to the body. A securing screw is received in a threaded opening in the body to secure the bar and the knife to the body.

Abstract: A high speed planer head. Disclosed according to one aspect of the invention is a hub and a threaded member. The hub is axially disposed for rotation about an axis, and has a pocket for receiving a first knife against a supporting wall of the pocket. The threaded member has a frustoconical ramping portion for producing a wedging force against the knife when the threaded member is threaded into a threaded hole in the hub. According to another aspect of the invention, a second hub for carrying a second knife is provided, the second hub preferably being bolted to the first hub to that the hubs can be disassembled. The second knife preferably has two linear cutting edges and the second knife preferably has at least two curvilinear cutting edges and more preferably has four concave, semi-circular cutting edges that are spaced apart from one another with 90 degree rotational symmetry.

Abstract: There is provided a rotatable cutting tool for supporting at least one knife in at least two alternate angular cutting configurations. The cutting tool includes a body that defines at least one cavity extending generally in a longitudinal direction of the body. Each cavity is configured to support one of the knives at predetermined hook and shear angles, and each cavity can be configured to provide a different hook and/or shear angle.

Abstract: A router bit with a position stop is disclosed. The router bit includes a body with a collar extending outwardly from it and a shaft extending outwardly from the collar. At least one cutter blade is mounted to the body and the cutter blade may be used to cut a profile into a workpiece. The collar has a first diameter, the shaft has a second diameter and the first diameter is larger than the second diameter. The collar has a face formed a spaced distance or height from the transition point between the collar and the body. The face rests against the upper surface of a chuck when the shaft is secured in the chuck. This allows the body and hence the cutter blades to be held a predetermined distance above the upper surface of the chuck. A second router bit may be provided to cut a complimentary second profile in a second workpiece.

Abstract: A stump grinding apparatus having a split cutting wheel includes several replaceable cutter blocks secured to the periphery of the wheel. One or more replacement teeth are removably anchored in holes in each block and may also be mounted on holes in the side of the split wheel as well. The teeth are typically provided with a hardened cutting face, and are reinforced with an extension projecting back from the face. Each tooth includes a shank which fits into one of the holes. The shank contains a groove which receives a spring clip or a spring pin for securing the tooth in the hole. The wheel periphery contains individual recesses that are shaped to receive the cutter blocks. Each block includes means for insuring alignment of the block in the corresponding recess. The block is wedged tightly into its recess to reduce the likelihood of accidental removal.

Abstract: A wood working knife for use in a wood working machine, comprising a knife body having a first cutting edge and an opposed second cutting edge, the knife body having a first clamping surface and a second clamping surface. The first clamping surface has opposed clamping features separated by a middle section, the opposed clamping features and the middle section being sized and shaped such that, upon the knife body being inserted into a clamping assembly, the clamping forces are localized towards the opposed cutting edges and away from the middle section.

Abstract: A knife assembly and chipping knife therefor. The knife assembly includes a knife, and employs an upper clamping member and a lower clamping member for clamping the knife therebetween. The knife has an elongate axis and two spaced apart cutting edges parallel to the elongate axis and defining a first reference plane. The knife is further defined by a plane of reflective symmetry that is perpendicular to the first reference plane and which contains the elongate axis. The knife has a front side and a back side spaced from the front side. The front and back sides terminate in the cutting edges. A deflector ridge projects from the front side and reaches a point of greatest maximum projection of the knife from the first reference plane, the point lying in the plane of reflective symmetry.

Abstract: A new design and configuration for tree stump cutting tooth and its corresponding holding bracket. Notch(s) on the tooth and rib(s) on the bracket are used to allow fast installation of tooth without gauging, reduced the time needed for such necessary tasks. The notch/rib structure also increases the clamping power of the bracket, reducing the possibility that any tooth would fly out, due to the centrifugal force, and cause injury. Wide notches are employed on certain heavy-duty tooth and allow the installation to be done quickly in two positions, and a small range in between the two positions.

Abstract: A rotary cutter of a wood planing machine includes: a rotary shaft that has alternately disposed fan-shaped vanes and fan-shaped grooves; and blades secured respectively to the fan-shaped vanes. Each of the fan-shaped vanes has a leading face and a trailing face. Each of the blades is attached securedly to the trailing face of the respective fan-shaped vane. The leading face of each of the fan-shaped vanes and the trailing face of an adjacent one of the fan-shaped vanes converge toward a center portion of the rotary shaft so as to define a respective one of the fan-shaped grooves, and cooperatively define an angle therebetween. The angle is greater than 60 degrees and less than 120 degrees.

Abstract: A rotary cutter includes: an elongated shaft that defines a rotation axis and that has two opposite mounting ends, and at least one axially extending blade-mounting surface parallel to the rotation axis and extending between the mounting ends; a pair of blade-aligning members, each of which is mounted on a respective one of the mounting ends of the shaft, and each of which is formed with at least one protrusion; at least one blade attached to the blade-mounting surface and having two opposite end portions, each of which is formed with a recess that receives the protrusion of a respective one of the blade-aligning members; and a fastening plate and screws for fastening the blade to the shaft.

Abstract: A wood chipping or cutting knife assembly providing improved knife stability. A number of control surfaces and other geometric features are provided to stabilize the knife in the assembly. An improved splitter is also provided for the knife assembly.

Abstract: A rotary cutter includes: an elongated polygonal shaft that defines a rotation axis, that has blade-mounting surfaces parallel to and surrounding the rotation axis, and that is formed with blade-aligning studs for aligning a blade, the blade-mounting surfaces being equidistant from the rotation axis, two adjacent ones of the blade-mounting surfaces defining an angle therebetween, the angles defined by the blade-mounting surfaces being equal; blade-fastening plates, each of which is attached to and cooperates with a respective one of the blade-mounting surfaces of the shaft to define a blade-receiving gap therebetween for receiving the blade; and fastening screws for fastening the blade to the respective one of the blade-mounting surfaces of the shaft.

Abstract: A router bit with a position stop is disclosed. The router bit includes a body with a collar extending outwardly from it and a shaft extending outwardly from the collar. At least one cutter blade is mounted to the body and the cutter blade may be used to cut a profile into a workpiece. The collar has a first diameter, the shaft has a second diameter and the first diameter is larger than the second diameter. The collar has a face formed a spaced distance or height from the transition point between the collar and the body. The face rests against the upper surface of a chuck when the shaft is secured in the chuck. This allows the body and hence the cutter blades to be held a predetermined distance above the upper surface of the chuck. A second router bit may be provided to cut a complimentary second profile in a second workpiece.

Abstract: The invention is a planing cutter with a cylindrical cutter body (1) with recesses (3) along its enveloping surface. Each recess is delimited by a front wall (4), a rear wall (5) and a bottom (6) and contains a cutting element (7). Each cutting element (7) has a cutting edge (8), a lower edge (9), two lateral edges (10,11), a front face (12) and a rear face (13). One clamping device (2) is also located in each recess. According to the invention each lateral edge (10,11) of the cutting element (7) has a range (14) of grooves. At least one groove in each range interacts with a peg (17,18) protruding from one of the walls (4,5) of the recess (3). The invention also concerns a cutting element (7) for use with the cutter of the invention.

Abstract: There is provided a rotatable cutting tool for supporting at least one knife in at least two alternate angular cutting configurations. The cutting tool includes a body that defines at least one cavity extending generally in a longitudinal direction of the body. Each cavity is defined by first and second knife support surfaces, which are provided in an opposing, non-parallel configuration. The first knife support surface is configured to support one of the knives that is urged against the first surface at a first hook angle, and the second knife support surface is configured to support one of the knives that is urged against the second surface at a second hook angle, which is different from the first hook angle.

Abstract: The invention is a planing cutter with a cylindrical cutter body (1) with recesses (3) along its enveloping surface. Each recess is delimited by a front wall (4), a rear wall (5) and a bottom (6) and contains a cutting element (7). Each cutting element (7) has a cutting edge (8), a lower edge (9), two lateral edges (10,11), a front face (12) and a rear face (13). One clamping device (2) is also located in each recess.

Abstract: Single-edged wood chipper blades which can be repeatedly removed from a wood chipper and sharpened, as needed, to prevent the need for disposing of multiple conventional blades over a prolonged period of repeated use. Each of the replaceable blades typically includes a blade mount base for engaging a rotary chipping head of the chipper, a clamp plate for engaging the blade mount base, and a blade body interposed between the blade mount base and the clamp plate. A blade edge is shaped in the front end of the blade body, and extends from between the blade mount base and the clamp plate. A blade babbitt is provided in the rear end of the blade body. Accordingly, the blade body can easily and repeatedly be removed from between the blade mount base and the clamp plate and sharpened, and again secured in place between the blade mount base and the clamp plate, as needed for optimum and economical operation of the chipper over a prolonged period.

Abstract: A cutter unit includes two positioning bars mounted securely in a retaining groove of a rotating axle to define a cutter-receiving chamber therebetween. A cutter positioning block is disposed in the chamber. A first side face of the cutter positioning block is formed with a cutter-holding recess to receive a cutter. The recess is defined by a recess-confining wall with two opposing wall portions abutting against two end faces of the cutter. A side face of the cutter is disposed outwardly of the recess. An adjusting unit is disposed between and abuts against a second side face of the cutter positioning block and one of two wall portions of the retaining groove, and is adjustable to move the cutter positioning block and the cutter so as to press the cutter against the other one of the wall portions of the retaining groove.

Abstract: A portable power planer for planing the top surface of a workpiece. The portable power planer includes a carriage assembly and a carriage elevation mechanism for translating the carriage assembly. The carriage elevation mechanism includes a plurality of threaded guide posts and an elevation mechanism that employs a plurality of threaded structures that are threadably engaged to the guide posts. A locking mechanism is also provided to inhibit movement of the carriage assembly along the guide posts.

Abstract: A cutter for a wood planing machine includes a block piece having a blade-mounting face that is formed with a positioning groove, and a blade attached to the blade-mounting face and having a plurality of positioning tabs projecting into and engaging the positioning groove.

Abstract: A method and apparatus for clamping a knife. A front side of the knife includes a recess and the knife is clamped between an outer clamping member adapted to receive the back side of the knife, and a inner clamping member adapted to receive the front side of the knife, the inner clamping member making contact with the front side of the knife at two spaced locations thereon, wherein at least one of the locations is outside the recess and the other is inside the recess, wherein the width of the recess normalized by the overall width of the knife yields a result that is preferably no more than about 0.22.

Abstract: In a cutting blade support body for a wood working cutting head including a cylindrical support body with at least two recesses disposed in axial symmetry and extending over the full axial length of the cylindrical support body for receiving and supporting hard metal cutting blades, an annular plate is mounted on each end face of the cylindrical support body and extends over the axial ends of the recesses so as to radially fully cover the recesses and contain the cylindrical support body when exposed to high centrifugal forces.

Abstract: A method and apparatus for reducing the size of wood members, particularly pan-shaped wood members known in the industry as “lilypads”, such that the orientation of the fibers of the lilypads are encouraged to be substantially perpendicular to the longitudinal and rotation axis of a cutting drum having a plurality of cutting members extending from its circumferential surface.

Abstract: A helical knife assembly has a plurality of blade holders. Each blade holder has two opposite step flanges, a blind hole, and a threaded groove communicating with the blind hole. A positioning block has a slant recess and two apertures. An oblong blade has two positioning holes. A pressing block has a bevel and an inner threaded hole. A hollow double end bolt has a first outer thread and a second outer thread. The positioning block is inserted in the respective blade holder. The oblong blade is disposed on the positioning block. The first outer thread of the hollow double end bolt is inserted in the threaded grooves The second outer thread of the hollow double end bolt engages with the inner threaded hole of the pressing block.

Abstract: Cutter head for wood working machines comprising a carrier with at least one receptacle for detachably receiving a cutter unit and a means for adjusting the flight circle of a cutting edge of the cutter unit, wherein in order to facilitate such a cutter head in view of the manufacture and installation thereof and to improve the resharpening ability of the cutter unit, the adjusting means comprises at least one spacer arranged between the cutting edge and the receptacle in an exchangeable manner and defining the distance between the cutting edge and a bearing surface of the receptacle.

Abstract: A cutting tool device for a wood planing machine includes a driving shaft having a cylindrical portion and a plurality of insert receiving channels. Each of the channels includes a knife seat wall surface and an abutment wall surface, which confine an accommodating cavity therebetween. The knife seat wall surface has left and right end edges respectively having left and right secant points at a respective junction with an outer wall surface of the cylindrical portion. The left secant point lags behind the right secant point in a counterclockwise operating direction. A planing knife is disposed to abut against the knife seat wall surface. A tightening insert member is inserted into the accommodating cavity, and has front and rear wall surfaces respectively abutting against the planing knife and the abutment wall surface to thereby clamp the planing knife firmly in the respective channel.

Abstract: This invention relates to an improved separator, commonly referred to as a “lath”, “stick”, “sticker”, or “crosser”, that is used in the lumber industry to separate pieces of lumber in a stack or bundle. The separator features, in one embodiment, a plurality of grooves traversing the length of the separator to permit air circulation within the grooves, and a plurality of ridges between the grooves to support the pieces of lumber. In another embodiment, a second plurality of grooves traverse the length of the separator and the first grooves to form a cross-hatching of grooves to permit air circulation within the grooves, and forming a plurality of protrusions to support the pieces of lumber over the grooves.

Abstract: A cutting tool assembly (10) having a body portion (12) and at least one cutting portion (14), the at least one cutting portion (14) having a clamping portion (16), an insert retaining member (18), a precisely located cutting insert (20) and a securing member (22) for ensuring that precise location of the cutting insert is maintained. If the insert-retaining member becomes damaged due to contact with a workpiece it can be removed from the cutting tool assembly and replaced.

Abstract: Cutter head for wood working machines comprising a carrier with at least one receptacle for detachably receiving a cutter unit and a means for adjusting the flight circle of a cutting edge of the cutter unit, wherein in order to facilitate such a cutter head in view of the manufacture and installation thereof and to improve the resharpening ability of the cutter unit, the adjusting means comprises at least one spacer arranged between the cutting edge and the receptacle in an exchangeable manner and defining the distance between the cutting edge and a bearing surface of the receptacle.

Abstract: A manual planing machine, has a planer shaft having at least one longitudinal slot, an elongated flat planer knife clamped in a detachable manner in the and formed as a dual-cutting mini reversible tip with at least one cutter and with a back groove extending parallel to the cutter and with a holding rib on a side of the longitudinal slot to prevent an intentional detachment from the planer shaft, the planer knife carrying only one the cutter, extending in a corrugated manner in such a way that troughs of the cutter lie on a common first straight line having the same spacing relative to the back groove as a cutter of a mini reversible tip, while its crest lie on a common second straight line which extends 0.5-1.5 mm radially above the first straight line, the planar knife carrying a contact edge which is right-tangled and is flattened relative to a back, instead of another cutter at a side located opposite from the at least one cutter for support at the radial stop of the planar shaft.

Abstract: In a mounting arrangement for supporting, in a stepwise adjustable fashion, a cutting blade in a cutting head for working wood or plastic, the cutting blade has at least one cutting edge and opposite side edges with wave-like profile structures and claw elements are mounted on the cutting head and have engagement portions extending into the troughs of the wave-like profile structures for form-fitting engagement therewith. Each wave-like profile structure has a greater length in the direction of the side edges of the cutting blade than the respective engagement portions of the claw elements so that the position of the cutting blade is adjustable.

Abstract: A disposable carbide cutting blade assembly for a universal rotary molding cutter head. The assembly comprises a disposable carbide blade blank having its cutting surface contoured to the desired configuration, a smooth rear, bottom, and front surface, and a hole extending through the carbide blade blank. The carbide blank is positioned against a steel backer plate, which in turn is provided with a ledge for supporting the carbide blank from below, and a smooth front surface against which the rear surface of the carbide blank rests when in position. A safety pin protrudes from the front face of the steel backer plate, and extends into the hole within the carbide blank to properly seat the carbide blank against the steel backer plate. The rear surface of the steel backer plate is provided corrugations along its entire height for mating with the corrugations on the inner wall of a slot of a universal rotary cutter head.

Abstract: A wood surfacing method and apparatus. A projecting surface projects from a cutting head adapted for rotating a knife about an axis. An article of wood is fed toward the cutting head. The projection projects from the cutting head, behind the knife with respect to the direction of rotation of the cutting head. The projection is adapted to make contact with the wood with a force that is substantially constant as the wood is fed.

Abstract: An interchangeable cast metal block for mounting on a rotor shaft, the shaft having a polygonal cross-section. The block includes a substantially circular body having a central bore complementary to the polygonal cross-section of the rotor shaft such that the rotation of the shaft will turn the block. There are at least two opposed cutting blade mounting bosses for attachment of cutting blades on the external surface of the block. The mounting bosses are positioned on the block in a predetermined geometric arrangement relative to a facet of the polygonal center bore such that the block can be reversed and re-mounted on the rotor shaft to effectively double the available number of cutting blade positions. The number of available cutting blade positions is two times the number of facets on the polygonal center bore. A plurality of the blocks may be stacked on the rotor in an array to provide a plurality of cutting blade patterns along the length of the rotor shaft.

Abstract: A planer (10), in particular a hand held planer for machining wood, with a planer housing (12), which includes a planer shaft (20), supported rotatably in at least one direction with an outer contour (23), which in a longitudinal groove (46) has at least one planer blade (21), which is braced on a centrifugal wedge (56) that can be prestressed with a spring (54) or the like can be produced more simply and economically in that the centrifugal wedge (56) is fastened to the planer shaft (20), elastically movably relative to it, in captive fashion solely by the spring (54), in particular being removable without destruction, and substantially without touching the planer shaft (20).

Abstract: A method and apparatus for reducing the size of wood members, particularly pan-shaped wood members known in the industry as "lilypads", such that the orientation of the fibers of the lilypads are encouraged to be substantially perpendicular to the longitudinal and rotation axis of a cutting drum having a plurality of cutting members extending from its circumferential surface.

Abstract: A rotary cutter head is provided having body shape characterized, generally, outwardly-shifted cylinder segments to shift cutter head weight and force to the knife blades and to balance and extend the knifes from the central core of the cutter head while reducing workpiece waste buildup along the knife front, and while decreasing clogging of knife mounting components and reducing over-heating of knives and with securing corrugations on the knife cutting face, engageable with corrugations on the cutter head for securing the knife base against a foot on the cutter head.

Abstract: A rotary cutter is disclosed. The rotary cutter includes a roller having a plurality of flutes defined in the periphery thereof, and a plurality of blades arranged on the periphery of the roller along each of the flutes. Each of the flutes has a pair of helical sections that branch outward and forward from a junction and extend around the periphery of the roller.

Abstract: A woodworking shaper head having a plurality of cutting blades mounted about the periphery thereof. Each cutting blade is mounted in a longitudinally extending channel in the surface of the head, and a gib of wedge shape is disposed in the channel to securely retain the blade. The forwardly facing side wall of the channel and the adjacent surface of the blade include intermeshing corrugations which resist withdrawal of the blade during operative rotation of the head.

Abstract: A cutter device includes a cylindrical cutter seat having opposite end faces and a cylindrical surface between the end faces. A coupling shaft extends co-axially from a respective one of the end faces. The cylindrical surface is formed with an axially extending cutter receiving groove between the end faces to receive a cutting blade therein. The cutter receiving groove is defined by a blade supporting wall, a fastener bearing wall, and a groove bottom interconnecting the blade supporting wall and the fastener bearing wall. Each of two positioning members is sleeved on a respective one of the coupling shafts, and has a large-diameter ring portion and a small-diameter ring portion that extends co-axially therefrom toward a respective one of the end faces of the cutter seat such that the large-diameter ring portion abuts against a respective lateral end portion of the cutting blade and such that a base edge of the cutting blade is supported on the small-diameter ring portion.

Abstract: In a wood planing machine, a rotatable cutter seat is provided with at least one axially extending cutter receiving groove and two positioning disks at two axially opposing ends of the cutter receiving groove. A cutting element received in the cutter receiving groove has two axially opposing ends formed with axially projecting tongues. The positioning disks are notched to formed recessed tongue rest faces to seat the tongues when the cutting element is placed in the cutter receiving groove, thereby placing the cutting element in a proper orientation relative to the cutter seat without contacting the former with a groove bottom of the cutter receiving groove. The planing machine further includes an indicator which indicates a thickness that will be removed from a workpiece by the cutting element. The indicator includes a pointer and a workpiece contact element associated with the pointer.

Abstract: The plane head for the hand-held planing machine includes a cylindrical base body (11) made from a group of identical stamped sheets (18) arranged axially next to each other and each provided with a punched hole (150) so as to form a base body cavity (15); a planing knife (14) protruding radially beyond an outer surface of the base body (11) from a longitudinal groove (13) and fixed therein by a form-fitting connection or form-locking connection so that the planing knife cannot be radially dislodged from the base body; and a chuck wedge (16) received in the base body cavity (15) so that the planing knife (14) is clamped in the base body (11) by centrifugal force during rotation of the plane head.

Abstract: A saw for simultaneously cutting and beveling including a cut-off saw, a cutting blade, and a beveling blade. The cutting blade cuts simultaneously while the beveling blade bevels. The beveling blade preferably has a head with two faces annularly connected by an annular slanted circumference. The head has at least one notch suitable for accommodating a respective at least one tooth insert interconnected with a respective at least one cartridge. Each cartridge is interconnectable with a respective tooth insert.

Abstract: A self aligning knife clamping assembly and machine incorporating the same are disclosed. In one embodiment there is provided a knife clamping assembly having an upper clamping component, a lower clamping component and a fastening device, such as a bolt, therebetween, to permit the clamping components to be releasably clamped together onto a knife element having a knife edge. Positioned between the knife element and the clamping assembly is a biasing element, which urges the knife element to enter, or remain in, a preferred position prior to the knife element being immovably clamped into place. In the preferred embodiment the biasing element is in the form of an elastomeric strip.

Abstract: In a cutter head, especially for a profile cutter, with a basic body (1) having at least two recesses (3) uniformly distributed around its circumference, cutter (5) can interchangeably be secured in the recesses by means of a clamping device having at least one clamping component (8) and at least one clamping screw acting therewith and with the basic body (1). In the region of its inner end section, each of the clamping components is supported by the basic body (1) to pivot about an axis parallel to the latter's axis of rotation (12) and pivotable and clampable by means of at least one of the clamping screws (10) by a tensile force generated thereby against a bearing surface (4) of the recess (3).

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: An improved knife holder for a chipper disc. A knife holder for boding 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.