Abstract: An improved hammer mill hammer constructed by forming a groove in an edge of the grinding end of a hammer for receiving hard facing material and placing hard facing in the groove.

Abstract: A line blade for a rotating trimmer includes a loading section securable for rotation on a cutting plane with a head of the rotating trimmer. A living hinge extends from the loading section. A transition section extends from the living hinge and has a first cross-sectional shape. The first cross-sectional shape is configured and oriented to reduce drag. A cutting segment extending from the transition section has a second cross-sectional shape that is different from the first cross-sectional shape of the transition section, where the second cross-sectional shape is configured and oriented for cutting vegetation. The multi-zone line blade improves cutting at lower speeds, thereby requiring less power.

Abstract: A stump grinding wheel tooth assembly having a mounting block positioned around the periphery of the wheel and a cutting bit attached to the mounting block by a pin passing through a hole in the cutting bit and a corresponding hole in the mounting block and capped by a nut. The mounting block may support multiple cutting bits arranged into a predetermined patterns based on the location of the holes, such as pairs of cutting bits or even a quad formation. The cutting bits may be provided in various geometric configurations, such as round, triangular, square, rectangular, pentagonal, hexagonal, octagonal or decagonal.

Abstract: An apparatus (12) for calibrating slabs of agglomerated or natural stone material comprises at least one calibrating unit (15) provided with a calibrating head which is rotatable about a first rotational axis (16) perpendicular to a working surface (18). The calibrating head (14) comprises calibrating roller tools (24) with rotational axes (28) which are radially arranged around the said first axis (16) for working a slab arranged on said working surface and sliding with a relative movement under the head. Each tool (24) is mounted on a spindle unit comprising in combination: a spindle body passed through by a spindle shaft (30) for rotation of the tool (24) about its rotational axis (28); a motor unit (36) with a motor output shaft (42) having its own rotational axis (43), and a kinematic transmission (48) connected between the motor output shaft (42) and spindle shaft (30) for motorized rotation of the tool.

Abstract: Disclosed herein is a device and system for processing concrete. Certain embodiments may include a conveyor belt, milling, planning and shaping assemblies, specialized sawing assemblies, and a finishing assembly. The milling, or shaping assembly may be implemented during different phases of the process. Tools would be mounted along the conveyor belt and affixed directly over the conveyor belt, or mounted horizontally along side of the conveyor to produce a shaping or tolerance specification as desired. A tungsten, carbide milling apparatus or diamond grinding drum may be housed in a steel enclosure with a motor or hydraulic direct or belt drive. Next the saw assemblies may be placed and affixed directly over the conveyor belt. The second saw assembly is oriented perpendicularly to the first saw assembly or devices or mechanization may be added to position the concrete prior to entering the sawing machine. Various finishing assemblies are also disclosed.

Abstract: A tool holder transmission structure of a stone chamfering machine which is mainly characterized in that a transmission motor is installed at downward offset position inside the frame of the stone chamfering machine, whereof the transmission gear installed on the spindle of the said motor is through the bottom cut slot of the centered convex block at side plate of the frame to engage with the bottom tool driven gear of the multi-axis tool holder, whereby through rotation of the tool holder, different tool driven gear can be changed to engage with the motor transmission gear. Therefore, it is particularly useful to select different tools for stone chamfering operation according to practical needs.

Abstract: There is described a tool as well as a method for machining a workpiece made of a hard material by means of a geometrically determined blade. In order to obtain an improved surface quality of the machined workpiece when machining such a hard and brittle material, a tool is provided which has a cutting angle of less than 10°. According to the associated machining method, rotational speeds exceeding 1300 rpm are used. There is further described a machine that is to be used in such a tool and is utilized in such a method.

Abstract: A burr is provided for dressing a grinding tool, such as the grinding surface of a pulpstone grinding tool used for mechanical preparation of wood pulp. The burr includes a cylindrical body portion, a plurality of teeth disposed on and protruding outward from the outer surface thereof, and at least one annular channel formed in the outer surface thereof. The burr may provide for a more uniform dress pattern in a grinding surface of a pulpstone grinding tool to provide improved consistency and quality of wood pulp produced thereby.

Abstract: A burr is provided for dressing a grinding tool, such as the grinding surface of a pulpstone grinding tool used for mechanical preparation of wood pulp. The burr includes a cylindrical body portion, a plurality of teeth disposed on and protruding outward from the outer surface thereof, and at least one annular channel formed in the outer surface thereof. The burr may provide for a more uniform dress pattern in a grinding surface of a pulpstone grinding tool to provide improved consistency and quality of wood pulp produced thereby.

Abstract: The invention applies to a diamond dresser consisting of a rotary symmetric body on whose circumference and/or face is applied randomly distributed diamond particles. It is the task of the invention to use simple means to reduce the abrasion on the circumference of the dresser, and thus to achieve a substantial increase in the operational life of the dresser. The invention holds that closely-spaced radial running grooves that stretch to the circumferential edge of one face of the dresser in which oblong diamonds are inserted and fastened, or that in the circumferential edge tightly-spaced radial recesses are formed into which oblong diamonds are inserted and fastened. These oblong diamonds are radially arranged and their ends protrude beyond the circumference of the rotary symmetric body. The oblong diamonds substantially reduce abrasion to the circumference of the rotary symmetric body.

Abstract: A cutter assembly for installation on the rotary discs of a concrete finishing/stripper machine includes a base member for mounting on the rotary disc of a machine, a cutter member carried on the base member having a plurality of interchangeable cutting edges selectively presentable to a cutting position, a guide channel for constraining the cutter element for movement relative to the base member between first and second positions, and a coil spring for urging the cutter member toward a first of the positions while permitting movement of the cutter element along a path away from the first position and toward a deflected position in response to forces applied to the cutter element caused by obstructions on the surface being finished. The compression or pre-load on the coil spring is adjustable for varying conditions. The entire cutter assembly is readily mountable onto the bottom of the rotating disc and channels thereof by wedges, making set up of the machine quick and easy.

Abstract: An improved abrading tool adapted for being driven in rotation by a power tool is disclosed. The abrading tool includes a single piece housing having concentric inner and outer cylindrical walls. A plurality of abrading disc assemblies are in equal circumferentially spaced relation between the inner and outer cylindrical walls. Each abrading disc assembly includes an axle having an integral head and a key means adjacent the under side of the head adapted to be engagable with a keyed radial aperture of the inner wall for preventing rotation of the axle relative to the housing. A bushing is removably mounted on each axle between the inner and outer walls of the abrading tool. The bushing includes a flange formed at one end thereof adapted to be engagable with the outer wall of the housing. A plurality of abrading discs are rotatably mounted on each bushing wherein the flange is adapted to prevent contact between the abrading discs and the outer wall of the abrading tool.

Abstract: The profiling tool (10) has a segment (12) of a worm thread. Its active zone (13) is coated with grains of hard material (16) and is crowned in cylinder sections coaxial to the tool axis (26). During profiling, the grinding spindle (2) and the tool (10) rotate synchronously. By appropriate correction of the coupling ratio by means of a CNC control when moving the tool (10) in axial direction of the grinding worm (2), the grinding worm flank (1) can be dressed with any desired topology. The method makes it possible to profile topologically modified grinding worms (2) at the grinding worm (2) rotational speed used for grinding, which was previously not possible.

Abstract: A handheld and readily maneuverable apparatus for grinding floor surfaces and/or cutting grooves in a floor formed of a hard material such as concrete, stone or the like is disclosed. The apparatus includes an elongated tube having a motor mounted at its upper end and a special rotatable abrasive head at its lower end. Rotation of the motor is coupled to the rotatable abrasive head via a flexible shaft that extends longitudinally through the elongated tube. In one form of the invention, the abrasive head includes a grinding disk that is oriented generally horizontally relative to the floor when the apparatus is in its operating orientation, and the operator can manually maneuver the apparatus so as to grind the floor surface.

Abstract: A treatment disk for devices for roughening or treating surfaces of stone floors, wherein hammer-like treatment points are mounted on the treatment disk opposite each of respectively semicircular slideways of the treatment disk. This shape makes it possible for an operation of a treatment point to cause the treatment disk to make a circular movement in the slideway and not, as previously known, a jumping or chattering movement as in a compressed air jack. The treatment disk is preferably made in three parts, so that the cutout has an overall shape resembling a three-leaf clover and the treatment points are offset by approximately 20.degree. with respect to the symmetry axes of the clover leaf. This shape has proven to be particularly effective.

Abstract: A rock-cutting tool includes a sleeve equipped with cutting elements and supported on a shaft, the sleeve being separately rotatable and eccentrically arranged in relation to the shaft whereby, in use, rotation of the shaft imparts a radially oscillating motion on the sleeve. At least one adjustable counterweight is connected to the shaft and located within the sleeve.

Abstract: A cutter for an impact-type cutting machine having a cutter shaft which is eccentrically provided on a drive shaft and is adapted to eccentrically rotate around the drive shaft axis. The cutter has an opening therein into which the cutter shaft is inserted with play therebetween. The hole in the cutter extends in the longitudinal direction of said cutter. A central portion of the hole substantially coincides with the center of gravity of the cutter.

Abstract: A rock cutting assembly consists of a rock cutting roller, a shaft on which it is mounted, and a means for varying the mass of the assembly about the drive axis, to vary the balance of the assembly about that axis. Preferably two rollers are mounted on a common drive axis, the axes of the rollers being diametrally opposed and eccentrically displaced by the same distance from the drive axis. The mass-varying means may be a cavity or cavities in the hub or hubs, with means to introduce fluid into and extract it from the cavity or cavities. Alternatively the means may be a weight mounted to permit adjustment to vary the degree of imbalance.

Abstract: A rock cutting assembly which includes a rock cutting roller with the roller being composed of a central hub portion and an annular cutting element which is rotatably mounted on the hub and carries rock cutting formations, means for driving the hub portion of the roller about an axis which is eccentrically displaced from the hub axis, means engaged with the annular cutting element to limit its direction of rotation relatively to that of its hub to one direction only and means for balancing the roller against its eccentricity as the hub is rotated about its drive axis. Preferably the assembly includes a plurality of rock cutting rollers which are rotatable about a common drive axis with the axes of each roller hub being eccentrically displaced by a common distance and in such a direction from the drive axis so that the rollers balance each other as the rollers are rotated about their drive axis.

Abstract: In apparatus for removing material from the surface of a solid substrate, a rotary cutter cage has a plurality of cutters where each cutter has a plurality of projecting cutter teeth. The improvement comprises an adaptation in mounting of the cutters on the cutter rotary cage to force a lateral movement in the cutters when they impact a solid substrate being treated during rotation of the rotary cutter cage.

Abstract: A cutter is disclosed. The cutter comprises a frame, driving means mounted on said frame, having an output shaft, a casing mounted on said frame and rotatably receiving said output shaft at one end thereof, a rotatable shaft rotatably mounted on said casing at the other end thereof, driving force transmitting means mounted in said casing for transmitting the driving force of said output shaft to said rotatable shaft, and cutting means fixedly mounted on said rotatable shaft substantially at each outermost axial end thereof, and wherein said casing is interposed between said cutting means.

Abstract: A cutter subassembly for a concrete planing machine which is comprised of an elongated acrylic plastic tube on which is manually assembled a set of circular multitoothed cutting elements and annular spacers arranged in a predetermined order to provide a desired cutting configuration along a linear axis. The cutting elements and spacers are assembled in a jig which additionally permits the attachment of a retaining clip at each end for holding the cutting elements and spacers in a fixed position on the tube. A plurality of completed cutter subassemblies are mounted on the cutter shafts of a drum assembly of the planing machine. Upon rotation of the drum assembly, the acrylic tube of each cutter subassembly disintegrates, providing the needed relative radial movement or play between the cutting elements and the cutter shaft during a planing operation.

Abstract: The invention is directed to a rotary tool for attachment to a machine for working and smoothing an even surface of a base made of cement, concrete or similar hard material. The machine includes a multi-wheeled vehicle and at least one tool drive shaft arranged on the vehicle. The tool drive shaft defines a longitudinal axis extending perpendicularly to the base to be worked and has a tool holder for holding the rotary tool. The rotary tool includes a plate on which a plurality of cutter-wheel units are mounted about the periphery thereof. Each of the cutter-wheel units includes a frame attached to the plate and axles mounted so as to define respective rotational axes parallel to the plate and substantially parallel to a radius passing through the longitudinal axis of the tool drive shaft. A plurality of cutter wheels is mounted on the axles so as to rotate freely with respect thereto.

Abstract: An interchangeable support disc for diamond-bearing plates used in circular milling cutters for the planing of stones, marbles, granite and the like comprises a plurality of such plates mounted on discs which are in turn connected by screws to a circular support member so that the discs may easily be replaced. The parallelepipedal shape of the diamond bearing plates is particularly advantageous for the polishing of marble, granite, and similar materials because it contributes to the stability of the device. The screws are located out of center of the discs and closer to the center of the circular support member.

Abstract: A tool (10) and method for scarifying a surface is disclosed. Tool (10) comprises a backing plate (14) having a plurality of equally spaced brackets (16) extending downwardly therefrom. Each bracket (16) supports a pair of axles (18) on which are mounted scarifying elements (20, 20a). Each axle pair thereby defines leading and trailing stacks (32, 34) of cutting elements (20, 20a). The leading stack (32) of elements (20, 20a) scarifies parallel paths of soilage while the trailing stack (34) of elements (20, 20a) scarifies soilage between the indicated parallel paths to thereby clean a width of surface.

Abstract: An apparatus for removing mortar from used bricks which includes breaker means for breaking and dislodging mortar, penetration means operable to penetrate a layer of mortar, and scraper means for scraping and providing a finished surface on a brick. The breaker means, penetration means and scraper means are mounted on an elongate frame which in turn is mounted adjacent a track having a powered conveyor. The powered conveyor moves a used brick along the track through a cleaning station which includes multiple frames containing mortar-removing means. The apparatus may be incorporated into a machine containing multiple cleaning stations which provides for efficient, rapid cleaning of used brick and provides used brick which is substantially ready to be incorporated into new structures.

Abstract: A portable surface processing apparatus which has two rotors (R.sub.1, R.sub.2) fitted with blades driven in opposite directions by a motor (M). The reaction forces arising in the processing therefore mutually cancel each other.

Abstract: A milling tool for forming recesses, such as an undercut in a borehole, in masonry, concrete and similar material structures includes a tool shaft with a bearing pin extending outwardly from one end of the shaft and with the axis of the pin offset eccentrically to the axis of the tool shaft. A freely rotatable annular milling head is positioned on and encircles the bearing pin. The outside surface of the milling head has cutting edge members.

Abstract: An attachment adapted for mounting on a conventional rotary floor surfacing machine such as a buffer, sander, polisher or the like. The attachment having a plurality of individual wire blades that provide a brush like cutting edge for engaging and quickly removing old rubber padding attached to a floor.

Abstract: An assembly for cleaning ships' hulls of such marine growth as seaweed, shell etc. is disclosed. The assembly has a frame with rotating brushes, the frame being reciprocally pivotal over the hull in an arcuate direction by being connected to one end of an arm or the like. The other end of the arm is pivotally connected to a joint which forms a stationary point for the assembly.

Abstract: A milling cutter rotatable about an axis and including a cylindrical steel core having helical tapered threads, such as V-shaped threads, diamond grit of a suitable mesh being appropriately secured, as by nickel plating, onto the crests, roots and flanks of the threads, the diamonds being substantially contiguous one another and so related to each other that as the cutter rotates against the work, the individual crest diamonds will first cut the work and eventually break off. Because of the helical pattern, the cutting action will continue, since one of the other diamonds lying in the same transverse plane normal to the axis as the missing diamond will operate upon the work being cut. The loss of the outermost or crest diamonds will expose diamonds in the tapered flanks of the thread to provide cutting points on the cylinder that are operable to cut the work, the flank diamonds traversing the same path normal to the axis of the cutter as the crest diamonds.

Abstract: A rotary stripper, which can be chucked to a drive shaft, comprises a pair of discs spaced by a centrally positioned intermediate hub which has radial slots. Immediately outward of the hub and arranged in a ring concentric thereto are a series of equidistantly spaced pins, the axes of which are parallel to the central axis of the hub. The location of the pins, in a circular sense, places one thereof at and in adjacent relation to the outer end of each slot, offset from a direct alignment with the slot. The offset in each case is in a direction counter to that in which the hub is intended to rotate in use.Stripper elements which are relatively rigid but have a minor degree of flexibility are simultaneously slip fit to each pin and in the slot adjacent thereto and are resiliently mounted thereby to the hub. The stripper elements are contained by the discs to either end of the hub.

Abstract: In an abrading tool having a cup-shaped outer housing with a shank for attachment to a power-driven chuck and rotatable abrading discs on radial axles inside this housing, a plurality of knocker bars are attached to the outside of this housing. As the rotating housing is moved across the surface to be abraded, these knocker bars appear in succession at its leading side to bite into the material there and overcome the tendency of the abrading discs to ride over this material.

Abstract: A mechanical toy athlete built on a base has a hollow body portion comprising the torso of the athlete. A slidable plunger extends from within and out the top of the hollow body portion. The head of the athlete mounts on the top end of the plunger. Downward external pressure on the head moves the plunger from a rest position into which it is biased. A lever arm which represents either an arm or leg of the athlete, depending on the sport that the athlete "plays," mounts to the hollow body portion. The lever arm rotates relative to the hollow body portion in a fashion resembling the movement of the human limb which the lever arm represents and the lever arm is also biased into a rest position. The plunger, as it moves from its rest position, cooperates with the lever arm to rotate the lever arm from its rest position. When the leverarm rotates from its rest position, it propels a toy projectile, which represents the object that the athlete uses in the sport he "plays.

Abstract: A rotary cleaning device comprising a cup-shaped rotatable base member, a cylindrical resilient mounting received in the cup-shaped member, a plurality of elongated cleaning elements essentially in the form of wood screws mounted in the resilient mounting and extending through and beyond the same. The heads of the screws are positioned between the resilient mounting and the cup-shaped base member. A bolt having an enlarged head extends substantially centrally through the resilient mounting and the base member in a direction opposite from the extension of the cleaning elements. Nuts are mounted on the bolt and engagable with the base member to hold the assembly together in such manner that the heads of the screws are firmly grasped between the resilient mounting and the base member. The portion of the bolt which extends beyond the nuts constitutes a shank which is adapted to engage a rotary chuck for rotating the cleaning device.