Abstract: A tool holding device is disclosed, and the tool holding device includes a base, a block, and a fastening member for securing the block. The base includes a receiving portion defined between a countering wall and a shoulder wall, a surface defined adjacent to the shoulder wall perpendicularly and away from the countering wall, a penetrated hole defined on the countering wall, and a positioning hole communicating with the penetrated hole. The block includes a holding portion held in the receiving portion, a handle received in the penetrated hole, and a holding hole for holding a chisel. The countering wall and the shoulder wall define an angle less than or equal to 90 degrees. Therefore, the counterforce bearing of the base and block are both enhanced to raise the strength of the tool holding device.

Abstract: A cutting tool of a cutting machine having a base part and a bit holder. According to this invention, the bit holder has a plug-in attachment, retained in a socket of the base part that has a stop against which the bit holder rests. To prevent the penetration of water and stone dust and to allow the bit holder to be easily detached from the base part, a sealing element is located between the bit holder and the base part, surrounding at least sections of the socket.

Abstract: A cutting drum for a scarifying milling machine includes a rotatable drum having a generally cylindrical outer surface, and a plurality of flight blocks mounted onto the outer surface of the drum, defining a helical flight extending therearound. Each of the flight blocks includes a slot and at least one pocket formed therein. Each slot is generally rectangular and adapted to receive a tool holder. Each flight block includes a tool holder, having a generally rectangular body, removably mounted within the slot. A retainer is positioned within each pocket. Each retainer includes a planar tapered surface that is parallel to and engages one side of the rectangular body of the tool holder within the slot of the flight block to secure the tool holder therein.

Abstract: Cutting tool assemblies and wear and retention sleeves. The assemblies may include a support block that has a sleeve-receiving hole therethrough and a cutting tool that has an elongated shank. Various configurations of sleeves are disclosed for supporting the elongated shank of the cutting bit in the support block. Such sleeve embodiments may be provided with a plurality of axially extending overlapping notches to establish segments of various degrees of interference fit between the sleeve and the support block when seated in the sleeve-receiving hole of the support block. Some sleeve embodiments are configured to permit the shank of a cutting bit to freely rotate therein. Other sleeve embodiments are configured to prevent rotation of the cutting bit shank when inserted therein.

Abstract: A support base (1) which is to be mounted to the surface (2) of a milling drum (3) defining a direction of rotation (31) includes a recess (4) adapted to receive removably a shank portion (14; 21) of a body (5; 7) to be fixedly mounted to said support base (1). The recess (4) has a first side surface (101) facing into said direction of rotation (31) which is adapted to contact said shank portion (14; 21). The support base (1) further includes a reaction surface (111) adjacent to said first side surface (101) and also facing in said direction of rotation (31), wherein the reaction surface (111) is disposed at an angle of more than 180° with respect to said first side surface (101) and is adapted to bear against a support surface (151) of said body (5; 7).

Abstract: An improved bit assembly for road milling, mining, and trenching equipment includes a streamlined tip assembly that is a combination of conical and cylindrical in shape and devoid of protrusions or annular indentations that might impede the flow of removed material over and around the bit assembly or provide space for removed material to become clogged or imbedded on the tip assembly. The assembly further includes a generally cylindrical spacer that allows a bit removal tool access to the bottom of the assembly to aid in bit removal.

Abstract: A fixing device for a shank chisel, having a base part and an upper part, wherein the upper part is detachably connected to the base part. The upper part has an opening for receiving a shank chisel and the base part has a shaft opening, into which a shaft of the upper part is inserted, and the shaft has a tensioning surface that rests against the counter surface of a clamping element. The clamping element has a tensioning screw which is used to clamp the tensioning surface against the counter surface. The base part has a shoulder surface, which is located in the vicinity of or near the shank opening and at least partially surrounds the shank opening. A stop surface adjoins the rear region of the shoulder surface in the infeed direction at an angle. The upper part rests on the stop surface by a supporting surface and is held at a distance, at least in sections, from the base part.

Abstract: A chisel holder changing system having a base element with a chisel holder receiver, into which a chisel holder equipped with a chisel can be inserted, wherein the chisel holder is inserted with a holder shaft into the chisel holder receivers and is maintained therein with the aid of bracing screws. Bracing screws can be screwed into a threaded receiver of the base element and during this are supported under tension in a bracing receiver of the holder shaft of the chisel holder. If in a chisel holder changing system in accordance with this invention the surfaces of the outer screw thread of the bracing screw and/or of the inner screw thread of the threaded receivers of the chisel holder receivers have a metallic layer of zinc and aluminum lamellas and a mineral chromium oxide bonding agent, which is burned in after the application, the screw connections are improved so that larger prestressing forces/tightening torques can be transmitted without damage to the screw connections.

Abstract: The wear sleeve in the present cutter tool assembly comprises a rearward split ring portion and an intermediate cylindrical ring portion adjacent a forward shoulder portion. The outer diameter of the wear sleeve intermediate portion and rearward split ring portion is uniform. The wear sleeve is inserted into the bit holder's stepped bore aperture. The split ring portion is radially compressed by the smaller diameter rearward end as the sleeve is hammered and axially displaced into the bit holder. The split ring portion forms frictional contact with the opposite end portion of the aperture. The wear sleeve friction fit can be easily removed manually in the field. The bit holder and cooperating support block are designed to limit the amount of relative yaw between the two members during operation to reduce the overall wear there between.

Abstract: A stump grinding mechanism includes a disc having recesses formed in an outer peripheral surface thereof. Peripheral cutting assemblies are mounted in respective recesses. Each cutting assembly includes a holder fixed in the recess, and a cutter tooth mounted in the holder. The cutter tooth includes a shank extending through the holder and secured thereto by a nut. The nut is disposed within a pocket of the holder to be shielded during a cutting operation. The holder includes gauge marks to facilitate a proper angular orienting of the cutting assembly within the recess. Some of the cutter teeth have flat cutter faces optimized for cutting wood fiber, whereas others of the cutter teeth have cutter faces defined by converging surface portions to be optimized for cutting/displacing rocks.

Abstract: A cutting apparatus which includes a rotatable member having an outer surface and a plurality of cutting tool assemblies, wherein each assembly includes a cutting tool mounted in a holder. The cutting tool assemblies are mounted on the rotatable member so that the holder is shielded by the rotatable member, wherein the cutting tool extends beyond the outer surface of the rotatable member a sufficient distance to operate as a cutter.

Abstract: A cutting tool assembly having a holder block mounting scheme which effectively and accurately positions the cutting tip point at its designed angle of attack. The connection assembly limits undesirable shifting during attachment of the holder block to a cutting drum. The holder block connection assembly of the present invention includes a separate mounting plate that is positioned between the bit holder block and drum/pedestal for accurately aligning the bit holder block onto to the drum/pedestal. Once the bit holder block is aligned into position by the plate as designed the bit holder block is welded to the drum/pedestal.

Abstract: A drilling bit for use in conjunction with a holder that has a bore wherein the drilling bit has a drilling bit body that has an axial forward end and an axial rearward end. The drilling bit body further includes a reduced diameter portion adjacent to the axial rearward end thereof so as to define a reduced diameter surface. A hard insert is affixed to the drilling bit body at the axial forward end thereof. A resilient retainer sleeve has a first thickness and presents an interior surface. The retainer sleeve is carried by the drilling bit body within the reduced diameter portion. The resilient retainer sleeve is in an expanded condition when the drilling bit is not within the bore of the holder and the resilient retainer sleeve is in a compressed condition when the drilling bit being within the bore of the holder.

Abstract: A stump-grinding apparatus includes a block having an inner surface and an outer surface. The inner surface is adjacent to a side of the wheel between the center of wheel and the peripheral edge. The outer surface defines both a groove and a first aperture in the groove. A tooth is received into the groove. The tooth has a first end and a second end spaced from the first end. The second end defines a second aperture that can align with the first aperture. A fastener extends through the first and second aperture to fasten the tooth to the block.

Abstract: An improved bit assembly for road milling, mining, and trenching equipment includes a streamlined tip assembly that is a combination of conical and cylindrical in shape and devoid of protrusions or annular indentations that might impede the flow of removed material over and around the bit assembly or provide space for removed material to become clogged or imbedded on the tip assembly. The portion of the bit block which mounts on a drum or endless chain extends from a cylindrical portion of the bit block and provides opposed angled shoulders which extend downwardly and away from a central ridge on the bit block to again provide for efficient flow of removed material over and around the bit block.

Abstract: A cutting tool assembly having a holder block mounting scheme which effectively and accurately positions the cutting tip point at its designed angle of attack. The connection assembly limits undesirable shifting during attachment of the holder block to a cutting drum. The holder block connection assembly of the present invention includes a separate mounting plate that is positioned between the bit holder block and drum/pedestal for accurately aligning the bit holder block onto to the drum/pedestal. Once the bit holder block is aligned into position by the plate as designed the bit holder block is welded to the drum/pedestal.

Abstract: A chisel-holder changing system for a road milling machine, a coal cutting machine or the like to which a chisel-holder is fastened in an exchangeable manner by means of a connecting mechanism. The chisel-holder accommodates at least one chisel that can be exchanged. The middle longitudinal axis of the chisel is set at an operating angle of less than 90° with respect to the surface to be worked. In order to be able to obtain varied removal results using such a chisel-holder changing system, the chisel-holder can be fixed in two or more configuring positions to the base part and in different attachment positions of the chisel, the middle longitudinal axis of the chisel is slanted at various working angles.

Abstract: A chisel holder changing system having a base element with a chisel holder receiver, into which a chisel holder equipped with a chisel can be inserted, wherein the chisel holder is inserted with a holder shaft into the chisel holder receivers and is maintained therein with the aid of bracing screws. Bracing screws can be screwed into a threaded receiver of the base element and during this are supported under tension in a bracing receiver of the holder shaft of the chisel holder. If in a chisel holder changing system in accordance with this invention the surfaces of the outer screw thread of the bracing screw and/or of the inner screw thread of the threaded receivers of the chisel holder receivers have a metallic layer of zinc and aluminum lamellas and a mineral chromium oxide bonding agent, which is burned in after the application, the screw connections are improved so that larger prestressing forces/tightening torques can be transmitted without damage to the screw connections.

Abstract: A rotatable cutting bit, and rotatable cutting bit-bit holder assembly and washer that have increased wear resistance characteristics. The assembly incorporates a new holding washer design that has improved rotational characteristics between the cutter bit and top surface of the washer during operation. The washer includes a front face and a generally flat rear face, said front face has a plurality of ridges, said ridges each have a top face forming a bearing surface for the cutting bit to enhance rotation of the cutter bit and the flat rear face reduces rotation of said washer. The relative rotation between the rear face of the washer and front of the block face is reduced in the present invention. The improved wear resistance properties of the invention reduce the amount of necessary maintenance of rotary drums in the field resulting in reduce downtime and increase productivity. The washer is also simple to manufacture in a cost effective manner and easy to assemble in the field.

Abstract: According to the present invention a bit holder block that can be durably connected to both a driven chain and rotary drum is disclosed. The bit holder block is designed to enable it to be welded or fused by other well-known methods to either a rotary drum or driven chain. The invention includes a bottom surface for welding to either a drum or chain. The bottom surface includes a central arcuate surface and flanking flat surfaces at opposite ends of the central arcuate surface. On the flat plate of driven chain cutting machinery the flanking flat surfaces sit squarely on the flat plate. When welded to a drum the base's bottom surface makes two lines of contact with the drum limiting the likelihood of undesirable.

Abstract: A cutting tool assembly including a cutting bit having a head and a cylindrical shank portion of substantially constant diameter depending from the head as well as a bit holder including a cylindrical bore for receiving the cylindrical shank portion of the cutting bit. The shank portion includes an annular recessed groove. The cutting tool assembly further includes a retainer sleeve disposed between the shank portion of the cutting bit and the bore of the bit holder and which closely conforms about the shank portion while allowing the shank portion to rotate within the bore. The retainer sleeve includes at least one inwardly folded over stop tab that cooperates with the recessed groove to axially position the shank within the retainer. The retainer includes stop tabs that are bent around beyond the shear cut lines of the tab opening so that the hub portions of the shank do not transmit a force against these weakened shear cut areas of the retainer.

Abstract: A retainer, adapted to engage a recess in a cutting tool for securing the cutting tool to a support block, includes a retainer body having a main portion with first and second ends. The main portion defines a continuous shear zone having first and second ends. The retainer body further includes a protruding portion disposed between the ends of the continuous shear zone and spaced away from the ends of the main portion. The protruding portion extends radially from the main portion and is adapted to overlap the support block when the retainer is engaging the recess.

Abstract: A drill bit assembly is provided for releasably retaining a polycrystalline diamond compact drill bit cutter. Two adjacent cavities formed in a drill bit body house, respectively, the disc-shaped drill bit cutter and a wedge-shaped cutter lock element with a removable fastener. The cutter lock element engages one flat surface of the cutter to retain the cutter in its cavity. The drill bit assembly thus enables the cutter to be locked against axial and/or rotational movement while still providing for easy removal of a worn or damaged cutter. The ability to adjust and replace cutters in the field reduces the effect of wear, helps maintains performance and improves drilling efficiency.

Abstract: According to the present invention a bit holder block that can be durably connected to both a driven chain and rotary drum is disclosed. The bit holder block is designed to enable it to be welded or fused by other well-known methods to either a rotary drum or driven chain. The invention includes a bottom surface for welding to either a drum or chain. The bottom surface includes a central arcuate surface and flanking flat surfaces at opposite ends of the central arcuate surface. on the flat plate of driven chain cutting machinery the flanking flat surfaces sit squarely on the flat plate. When welded to a drum the base's bottom surface makes two lines of contact with the drum limiting the likelihood of undesirable.

Abstract: The wear sleeve in the present invention comprises a rearward split ring portion and an intermediate cylindrical ring portion adjacent a forward shoulder portion. The outer diameter of the wear sleeve intermediate portion and rearward split ring portion is uniform. The wear sleeve is inserted into the bit holder's stepped bore aperture. The split ring portion is radially compressed by the smaller diameter opposite portion end as the sleeve is hammered and axially displaced into the bit holder. The split ring portion forms frictional contact with the opposite end portion of the aperture. The wear sleeve friction fit can be easily removed manually in the field. The bit holder and cooperating support block are designed to limit the amount of relative yaw between the two members during operation to reduce the overall wear there between.

Abstract: A design is disclosed for promoting the formation of weld between a first member and a second member whereby a fin is introduced at the outer corner portion of the first member to minimize the creation of defects such as runout or rollover. While such a design is applicable to any industrial welding operation, this design is of particular interest for welding bases or bit blocks holding cutting bits onto rotatable drums, wheels or chains used in construction or mining operations.

Abstract: A “wet” pick box 1 comprises a body member 2, adapted in use to be welded to a rotary cutting head, whilst an aperture 5 is provided in the body member. Bores 15, 16 in the body member define an internal water course 6 connectable, at an inlet end 7, to a source of pressurised water; an aperture 8 in the body member is adapted to house a water discharge nozzle and is connected to an outlet end 9 of the watercourse 6. A tapped hole 10 intersects the bores 16 and a member 11A or 11B is insertable into, and removable from, the hole 10. The invention also includes a rotary mineral cutting head to which a plurality of such pick boxes are welded.

Abstract: A stump grinding tool includes a rotary cutting wheel having a pair of side surfaces and an outer peripheral surface. Cutting assemblies are mounted on the cutting wheel, each cutting assembly including first and second pockets disposed on respective side surfaces of the wheel. Each pocket includes a leading through-hole and a trailing through-hole aligned with respective leading end trailing through-holes of the other pocket for receiving a pair of cutting teeth. Each tooth extends through aligned through-holes of the pocket and cutting wheel in mutually opposite directions, wherein cutting elements of the teeth are disposed adjacent respective ones of the side surfaces. Each tooth is fixed by a nut threaded thereon such that each tooth and associated nut functions to clamp both of the first and second pockets against the respective side-surfaces of the cutting wheel.

Abstract: An excavation cutting tool holder includes a cutting tool holder having a holder body portion and a holder shank, the holder shank having a press fit portion and a shank bottom end, the shank press fit portion having a shank press fit dimension and the shank bottom end having a tool holder locator. The excavation cutting tool holder assembly further includes a support block having a block body, the block body having a block bore, the block bore having a block bore press fit portion and a block engagor, the block bore press fit portion having a block bore press fit dimension less than the shank press fit dimension such that the shank press fit portion press fits with the block bore press fit portion while the block engagor engages the tool holder locator so as to orient the cutting tool holder relative to the support block.

Abstract: A design is disclosed for promoting the formation of weld between a first member and a second member whereby a fin is introduced at the outer corner portion of the first member to minimize the creation of defects such as runout or rollover. While such a design is applicable to any industrial welding operation, this design is of particular interest for welding bases or bit blocks holding cutting bits onto rotatable drums, wheels or chains used in construction or mining operations.

Abstract: An excavation cutting tool holder retention assembly includes a support block having a tool holder bore, the tool holder bore having a bore interior surface. The excavation cutting tool holder retention assembly also includes a cutting tool holder having a shank portion, the shank portion having a shank engagement surface. The excavation cutting tool holder retention assembly further includes a locking member forced between the bore interior surface and the shank engagement surface so as to frictionally retain the shank portion of the cutting tool holder within the tool holder bore.

Abstract: This invention relates to an excavation cutting tool holder retention system. The excavation cutting tool holder retention system includes a support block having a tool holder bore. The excavation cutting tool holder retention system also includes a tool holder having an effective shank, the effective shank being expandably adjustable within the tool holder bore so as to retain the effective shank within the tool holder bore.

Abstract: In the plough pick arrangement according to the invention for mining ploughs or coal ploughs, the plough pick is held in the socket of a pick holder. On that side of the pick holder which is leading in the working direction of the plough pick a pick lead-through opening is provided through which the pick can be inserted by its shank until it reaches a rear stop and is retained by a securing device. The pick can be removed from the socket through the same opening, after the securing device has been released, when pick replacement is necessary. This makes it possible to insert the pick into and remove it from the pick holder, not from the working side, but from the front of the holder. The pick holder and the pick are preferably provided with co-operating bearing and guiding faces which are inclined at an oblique angle to a plane parallel with the working face so that the cutting bit of the pick moves away from the working face when the pick is removed.

Abstract: A two piece improved stump grinding tooth comprising a one piece cutting tooth having a hardened cutting bit, preferably made of tungsten carbide, or another material having hardness properties similar thereto, fixedly attached to the body portion of the tooth through brazing or other attachment process. The tooth body and tip are positioned at predetermined angles to improve the cutting characteristics of the tooth as it engages and removes material from a stump, and are held in the proper cutting position on the grinding wheel by a pair of mounting blocks through which the tooth body is secured to the grinding wheel.

Abstract: An excavation cutting tool holder retention system. The cutting tool holder retention system includes a cutting tool holder having a holder side surface, a flange recess at least partially enclosed by the holder side surface, and a holder engagement surface together with a support block having a tool holder bore into which the cutting tool holder is inserted and a block pin bore intersecting the tool holder bore, the block pin bore defining a block engagement surface which is inclined downwardly relative to the tool holder bore. The cutting tool holder retention system further includes a pin having a pin shaft, the pin shaft having a pin flange which engages the flange recess so as to limit translational movement of the pin shaft. The pin engages the block engagement surface and the holder engagement surface such that the pin may be moved to draw the cutting tool holder into the tool holder bore.

Abstract: A toolholder for milling drums of scarifying machines including a body having a longitudinal axis, at one end provided with a housing suitable to house a milling tool. The body of the toolholder has an outside annular groove so as to reduce the resisting section of the toolholder and form a pre-set breaking area.

Abstract: The present invention relates to an improvement in tooth of ore recovery buckets which comprises a single monobloc body 10 having an extreme posterior portion 1 with its upper face provided with an oblong undercut 2 provided with a pair of throughout round orthogonal holes 3 constituting the single body 10 definer of the tooth. Intermediately the single body 10 has a structural thickening 4 that extends itself downwards according to a prismatic shape providing a wedge 5 with a fluted anterior-inferior end 6. The entire surface of the upper inclined wall 7 and the lower horizontal wall 8 of this wedge 5 incorporates fluted transversal undercuts 9 parallel and spaced between themselves.

Abstract: A rotary cutter having a plurality of flights each having a tool holder receiving pocket extending radially inwardly from an outer surface of the flight. Each receiving pocket has a mounting socket at the innermost portion of the pocket which securely positions a tool holder, the tool holder being retained in the socket by a fastener.

Abstract: An excavation cutting toolholder retention system. The cutting toolholder retention system includes a cutting toolholder having a flange recess and a holder engagement surface and a support block having a toolholder bore into which the cutting toolholder is inserted and a block pin bore intersecting the toolholder bore, the block pin bore defining a block engagement surface which is inclined downwardly relative to the toolholder bore. The cutting toolholder retention system further includes a pin having a pin shaft, the pin shaft having a pin flange which engages the flange recess so as to limit translational movement of the pin shaft. The pin engages the block engagement surface and the holder engagement surface such that the pin may be moved to draw the cutting toolholder into the toolholder bore.

Abstract: An excavation cutting tool holder retention system. The cutting tool holder retention system includes a cutting tool holder having a holder engagement surface and a support block having a tool holder bore into which the cutting tool holder is inserted. A pin having a pin engagement surface is movably mounted to the support block. At least one of the holder and pin engagement surfaces defines an inclined surface such that when the pin is moved the pin engagement surface will wedgingly engage the holder engagement surface so as to draw the shank portion of the cutting tool holder into the tool holder bore.

Abstract: An improved abrasive floor treatment apparatus that can be used to effectively treat a variety of floor surfaces, including floor surfaces that are uneven. The apparatus includes a plurality of special abrasive block assemblies that are mounted on the underside of one or more rotatable disks, with each such assembly including a mounting block that releasably retains a plurality of spring-biased abrader assemblies. Multiple configurations for these abrader assemblies are provided, each adapted for use in providing a different kind of surface treatment, and these abrader assemblies are easily and conveniently installed in the mounting block.

Abstract: A cylindrical cutting element for a cutting machine which includes base ps arranged at a uniform distance from each other. A chisel holder which receives an exchangeable chisel is secured with respect to each base element. The chisel holder has a plug connector which allows the chisel holder to be inserted into a plug receiver of the base element, where it is held by a pressure screw on the base part that grips the plug connector. To relieve the plug connector from the forces acting on the chisel, the base part has a projection which extends in an approximately parallel direction to the running direction of the cutting element and a stop that follows the projection in the running direction and forms an angle therewith. The stop limits the insertion of the chisel holder into the base element and absorbs forces transmitted through the chisel to the chisel holder.

Abstract: A double claw stump cutting tooth having two cutting heads having cutting faces angled to slice into a stump with both heads adapted for simultaneously cutting or chipping a stump.

Abstract: An excavation cutting tool holder retention system. The cutting tool holder retention system includes a cutting tool holder having a holder engagement surface and a support block having a tool holder bore into which the cutting tool holder is inserted. A pin having a pin engagement surface is movably mounted to the support block such that the pin engagement surface may be moved to engage the holder engagement surface. At least one of the holder and pin engagement surfaces defines an inclined surface such that when the pin engagement surface is moved to engage the holder engagement surface, the shank portion of the cutting tool holder will be drawn into the tool holder bore. In the preferred embodiment, at least one of the cutting tool holder and tool holder bore is tapered such that the cutting tool holder will be drawn and wedged into the tool holder bore of the support block when the pin engagement surface is moved to engage the holder engagement surface.

Abstract: A cylindrical cutting element for a coal cutting machine with a reamer-conveyor worm or reamer spiral for a coal cutting, disposed projecting at a distance from the surface of the cutting element and comprising base elements attached at uniform distances. A chisel holder with an exchangeable chisel is connected to each base element. The chisel holder is inserted with its plug-in connector into a socket of the base element and is maintained therein by a pressure screw. A time-saving assembly of a cutting element, wherein the base elements can be positioned on and fastened to the surface of the cutting element in a simple manner is attained where receiver pockets are cut along the reamer-conveyor worm or reamer spiral at uniform distances into the surface of the cutting element, the undersides of the base elements end in a base whose cross section is matched to the receiver pockets, and the base elements are introduced, positioned by the base, into a receiver pocket and are fixedly connected thereto.