Abstract: A masonry block that is produced from a workpiece that is split in a block splitting assembly which uses engagement surfaces that are enhanced with, for example, alternating ridges and valleys, preferably in combination with workpiece-engaging projections, to supplement or replace the action of the splitting blade in splitting and dressing the workpiece.

Abstract: A cutting tool has a centrally located tungsten carbide insert brazed into a seat at the forward end of the tool. The seat has a circular mouth and rearward of the mouth is a frustoconical inner wall. At the bottom of the seat is a transverse surface. A tungsten carbide insert is brazed into the seat and the base of the insert is complementary in shape to the seat. A second annular insert may also be brazed into a complementary shaped annular seat that surrounds the centrally located seat.

Abstract: A surface abrader apparatus includes a casing, a motor mounted on the casing, one or more working tools, and an operating mechanism mounted to the casing and supporting the working tools outside of the casing. The operating mechanism is drivingly coupled to the motor for causing an impacting movement of the working tools against a workpiece in response to selected operation by the motor. The operating mechanism includes one or more elongated shafts reciprocally mounted in the casing parallel to one another and having same one ends extending from the casing, a drive shaft rotatably mounted in the casing between and parallel to the shafts and rotatably driven by the motor, and coil springs and cam elements for causing lifting and releasing of the shafts and the working tools, such as impact abrading heads, mounted on the same one ends of the shafts to produce impact movements of the tools.

Abstract: The invention relates to a flat chisel (2), in particular an insertion chisel for power-driven rotary hammers for working stone, having a chisel head (3) which has a main lip (7) disposed transversely to a chisel longitudinal axis (x), a front and a rear striking face (10, 11), and at least one side face (12, 13) connecting the striking faces (10, 11). In this case, a side face (12, 13) designed as a side lip (14, 15) is provided.

Abstract: A novel method enables a reproduction of, including but not limited to, portraits, drawings, images, photos, figures and phrases in multiple color on a slab of, including but not limited to, a bluestone, marble and granite which constitue base material. An enlarged image of the object to be reproduced is sketched on a slab of black colored bluestone of thickness between 0.1 to 10 cm and density of 2.5 to 3.5 g/cm3. A gimlet made of an alloy of, including but not limited to, copper, iron and nickel is used to peck the slab on which the image is sketched. Outline and shade of the image is controlled by the depth and width of the scratch pecked by the gimlet. Colors of the drawing are coated by brushing oil dyestuffs on the pecked surface followed by a wipe out process. The oil dyestuffs left on the concave pecked surface result in the residual color of the drawing, images, and the base material.

Abstract: A concrete block splitter including an anti-backdrive holding blade, a rigid cutting table, and a lower cutting blade. The present invention provides a masonry splitter that splits blocks or bricks starting from the bottom side of the block, which typically includes the most dense material, so that a resultant fracture propagates along a uniform plane through the block. The anti-backdrive holding blade firmly clamps the block onto the rigid table during a splitting operation in such a manner that the blade does not move relative to the rigid table. Accordingly, during a splitting operation, the block is prevented from moving and the blade is prevented from deflecting. The cutting blade contacts the bottom surface of the block with sufficient force to propagate a fracture through the block. In the preferred embodiment, the splitter is mounted on self-powered wheels for easy installation and removal from an automated block production line.

Abstract: The breaker device for removing the tops of columns comprises a support structure composed of a plurality identical chain elements reciprocally linked by link couplings to form a closed chain which can surround a column which is to be topped. Each chain element bears a jackhammer provided with a plurality of interchangeable breaker punches, of varying lengths. Each chain element exhibits a plurality of holes which are distanced from the link couplings and which are for linking the chain elements. Each hole is aligned with a corresponding hole of an adjacent chain element. A pin is used for blocking adjacent chain elements in predetermined positions. The invention is useful for breaking the stop of a reinforced-concrete column without damaging the reinforcement elements thereof. The device can be adapted to columns having different diameters.

Abstract: A masonry block that is produced from a workpiece that is split in a block splitting assembly which uses any of a variety of projections to supplement or replace the action of the splitting blade in splitting and dressing the workpiece. The resulting masonry block has features that provide the masonry block with a weathered appearance.

Abstract: A tool for effecting drilling and/or chiseling and including a tubular shaft (2,22) having an axially extending through-channel (8,28) and provided, at one of its axial ends, with a drilling or chiseling head (5), and a connection member (3,23) connected with another of axial ends of the shaft and provided at its end remote from the shaft (2,22) with a shank (4,24), the through-channel (8,28) being connected with the tool circumference by a cross-bore (7,27), and the largest cross-sectional surface (A1,A4) of the connection member (3,23) corresponding at least to 2.5 times of the largest cross-sectional surface of the shank (4,24).

Abstract: The system of modular elements comprises a plurality of disc elements (11, 12 . . . ) with diamond outer rings (11a, 12a . . . ) for assembling on a single drive spindle with a spacing approximately equal to their thickness; mechanical fragmenting means (19, 20, 21, 22 . . . ) being provided in the spaces between the disc elements to operate essentially by impact, in contrast to the abrasive action of the diamond outer ring of the said disc elements; which disc elements have different diameters forming a broken line that corresponds substantially to the outline of the profile or shaping to be produced on marble, stone or the like; the arrangement being such that the disc elements (11, 12 . . . ) cut grooves by diamond abrasion and the mechanical fragmenting means (19, 20, 21, 22 . . . ) shatter the parts projecting from the grooves with an action of fragmentation by impact and by brittle fracture.

Abstract: A method of forming a base body for a diamond bit having a tubular carrier body (2, 12) with a bottom (4), and a shank (1, 11) projecting from the bottom (1), with the carrier body (2, 12) and the bottom being produced by a spinning process.

Abstract: The invention is a block splitting machine which uses an assortment of protrusions to supplement or replace the action of the splitting blade in splitting and dressing masonry block.

Abstract: A drill bit for producing circular-cylindrical recesses or boreholes is formed of a drilling cylinder (1) having cutting elements (3) at the leading end in the drilling direction. A detachable core sleeve (2) is arranged in the interior of the drilling cylinder (1). The cutting elements (3) extend radially inwardly at least for the wall thickness (a) of the core sleeve (2). The core sleeve (2) serves to receive a core formed of removed masonry and is intended to facilitate removal of the core from the drill bit. The manageability of the drill bit is substantially improved in this way.

Abstract: A tool mounting block having a forward surface and a rearward surface and a cylindrical transverse aperture extending therethrough opening onto both the forward and rearward surfaces. The tool has a tapered forward cutting end, and axially aligned behind the forward cutting end is an annular flange. Axially aligned behind the annular flange is a cylindrical mounting portion adapted to sidably fit within a complementarily cylindrical aperture of the mounting block, and extending rearward of the cylindrical mounting portion is a threaded stud. At the forward end of the tapered cutting end is a seat into which a hardened metal insert is bonded. To retain the cylindrical mounting portion of the tool within the cylindrical aperture of the mounting block, a locking nut assembly is threaded on the stud. When a tool is retained in a mounting block by such a nut assembly, the nut may be tightened to prevent rotation of the tool within the mounting block.

Abstract: A linear actuator, which may be used as a rock trimmer, comprises a support member extending upwardly from a work surface, and a first cleaving member coupled to the support member so as to be disposed above the rock sample opposite the work surface, the first cleaving member having a working axis. The linear actuator also comprises a positioning mechanism and a hydraulic mechanism, each being operatively associated with the first cleaving member. The positioning mechanism provides for imparting rectilinear travel to the first cleaving member so as to selectively adjust the position of the member relative to the work surface, along the working axis. The hydraulic mechanism produces a working force that is transmitted to the first cleaving member for application to the rock sample. The force is applied to the sample, directed downwardly toward the work surface substantially along said working axis. The positioning mechanism and hydraulic mechanism are constructed so as to have a common actuator.

Abstract: A tool 10 for rock breaking, log splitting and similar operations includes a plate 12 having a plurality of identical apertures 14 formed therethrough. A frame 16 comprised of a skirt 18 formed from lengths of angle iron and a plurality of legs also formed from lengths of angle iron supports the plate 12 in a substantially horizontal orientation above a workpiece. An implement 22 includes a first end for engaging the workpiece and a second end to be engaged with a hammer. The implement is further characterized by dimensions closely matched to those of the apertures formed in the plate. The plate 12positions the implement 22 in engagement with the workpiece and maintains the implement 22 in a substantially vertical orientation for engagement by an actuating hammer.

Abstract: A method and apparatus for producing a non-linear, ornamental edge along a cement siding workpiece. In accordance with one embodiment of the invention, a first cutting blade is configured to have a non-linear shape corresponding to a shape of an ornamental feature that is to be cut in the cement siding workpiece. A second cutting blade is then configured to have the non-linear shape of the first cutting blade. The first and second cutting blades are aligned with one another to position a first cutting edge on the first cutting blade opposite to a second cutting edge on the second cutting blade. A cement siding workpiece is then positioned between the first and second cutting blades so that the first and second cutting blades are aligned with a location at which an ornamental feature is desirably formed on the workpiece.

Abstract: A tool 10 for rock breaking, log splitting and similar operations includes a plate 12 having a plurality of identical apertures 14 formed therethrough. A frame 16 comprised of a skirt 18 formed from lengths of angle iron and a plurality of legs also formed from lengths of angle iron supports the plate 12 in a substantially horizontal orientation above a workpiece. An implement 22 includes a first end for engaging the workpiece and a second end to be engaged with a hammer. The implement is further characterized by dimensions closely matched to those of the apertures formed in the plate. The plate 12 positions the implement 22 in engagement with the workpiece and maintains the implement 22 in a substantially vertical orientation for engagement by an actuating hammer.

Abstract: Plunger-actuated surface-treating devices adapted for dislodging ice, linoleum, floor-tiles, carpets, and other topical-surfaces from underlying substrates.

Abstract: A guillotine cutting apparatus for solid bodies of hard brittle materials such as building bricks, blocks and stone, has a base member mounting a movable cutter for engagement with the body and cutting force applying means which imparts an impact cutting force to the cutter. Preferably a measuring frame for determining the length of the body parts that are to be cut comprises a movable stop member against which one end of the body is butted, the stop member being resiliently mounted in the frame to permit its movement away from the cutting plane as the body is cut. Preferably the cutting force applying means comprise a hand operated hammer slidably mounted on a relatively long shaft connected to the cutter member and guided by the shaft into contact with an anvil on the shaft, thereby imparting a stored energy high impact cutting force to the movable cutter.

Abstract: A rock trimmer for receiving, on a work surface, a rock sample to be cleaved. The rock trimmer comprising a support member extending upwardly from the work surface, and a first cleaving member coupled to the support member so as to be disposed above the rock sample opposite the work surface, the first cleaving member having a cleaving axis. The rock trimmer also comprises a positioning mechanism and a hydraulic mechanism, each being operatively associated with the first cleaving member. The positioning mechanism provides for imparting rectilinear travel to the first cleaving member so as to selectively adjust the position of the member relative to the work surface, along the cleaving axis. The hydraulic mechanism produces a cleaving force that is transmitted to the first cleaving member for application to the rock sample. The force is applied to the sample, directed downwardly toward the work surface substantially along said cleaving axis.

Abstract: In a rock-breaking apparatus of the type employing a striker pin and hammer providing shock absorbing means housed within the nose block to protect the nose block and its carrier from primary and/or recoil shock loads during use.

Abstract: An axially extending cutter bit has a shank extending between a trailing end (2, 7) arranged to be inserted into a tool chuck and a leading or working end (5, 8) with the shank between the trailing end and leading end being divided into a first section proceeding from the trailing end and a second section proceeding from the first section to the leading end. The second section is stepped inwardly from the first section. As a result, the energy throughput in passing shock waves is improved and higher material removal rates by the leading or working end are achieved.

Abstract: A hydraulic breaker includes a piston which is designed in the five-staged configuration including a first stage, a second stage, a third stage, a fourth stage and a fifth stage. The second stage is dimensioned to have a largest diameter, the fourth stage is dimensioned to have a larger diameter and the first stage, the third stage and the fifth stage are dimensioned to a same smallest diameter, respectively. A piston reversing chamber, a low pressure hydraulic chamber in which low pressure is normally present for the piston, a low speed pilot chamber for driving the piston at a low speed, a high speed pilot chamber for driving the piston at a high speed and a high pressure hydraulic chamber in which high pressure is normally present for the piston are sequentially formed in the space between the piston and the inner wall surface of a cylinder.

Abstract: Disclosed is a mining pick of the type having a shank and head with the head having an integrally bonded cutting tip, the cutting tip having a metallic substrate which is bonded to the head and also bonded to a superabrasive material cutting surface, wherein a thin section of the superabrasive material is bonded to the metallic substrate such that at least one edge of the thin dimension of the superabrasive material is oriented such that the digging action of the mining pick is that of a slicing or cutting action, rather than a crushing or pawing action.

Abstract: A method of fracturing a hard compact material such as rock or concrete, having a hole pre-drilled in the material area to be fractured which includes inserting a outer slug of solid material into the hole to a bottom thereof, and impacting the outer slug with a force sufficiently large to cause at least a top portion of the slug to transfer the impact to the sides of said hole so as to fracture the surrounding material.

Abstract: The machine includes a reciprocating piston/hammer (10) assembly, which is constrained against rotation in the cylinder (8). This allows the cutting bit to apply concentrated action along a line, and thus is useful for cutting grooves. The cutting bars (40) are arranged in sequence to enter progressively deeper into the groove. Many bits are arranged side by side, for cutting parallel grooves simultaneously.

Abstract: A low velocity, high mass ram is connected to the cutting tool. The cutting tool has an array of impact forward and side buttons or bars which form chip-forming spaces there between. The side buttons or bars advantageously cut a gage in the slot. A method of slot kerfing which cuts the kerf on an angle.

Abstract: The invention relates to a device for breaking off piles, said device being provided with a frame and at least one cutter which is movable to and fro in its longitudinal direction by means of a setting cylinder supported by the frame. The cutter is guided in an elongated passage, whose boundary wall is shaped such that at at least one location between the boundary wall of the passage and the outer circumference of the cutter there is present a recess extending in the longitudinal direction of the cutter and being open at both sides.

Abstract: A mineral cutter pick and its pick box are secured together through a spigot and socket connection. Opposed end faces of the pick and holding device that surround the connection have laterally oppositely inclined surfaces at opposite sides of a central plane of the pick extending in the direction of cutting movement. These complementary inclined faces improve the load distribution between the pick and its locking device in use and can also be arranged to restrict the entry of foreign matter into the spigot and socket connection.

Abstract: A punch for forming a rectangular opening in cinder block. The punch includes a housing having a wall with a toothed edge and which is generally rectangular in crosssectional shape. A tube is secured to the housing and extends perpendicularly outwardly from the toothed edge so that the axis of tube is positioned within the interior of the area circumscribed by the toothed edge of the housing. A rod having a piercing point at one end is slidably mounted within the tube so that the piercing point is contained within the housing while the other end of the rod protrudes outwardly from the free end of the tube. In use, the housing and piercing point are both positioned against the cinder block. The rod and free end of the tube are then struck by a hammer in order to form the rectangular opening in the cinder block.

Abstract: A set of anti-scuff boots for a tile cutter comprises a pair of loops made from a soft, durable material such as leather for demountably mounting on the breaking wings of the tile cutter. The loops are connected to one another and prevented from sliding off the breaking wings by means of a strap or cord which extends over the handle of the device, preferably resting against a thumb screw in the handle which prevents the cord from slipping.

Abstract: Presented is a tool adapted for use in rupturing the surface of smooth concrete so as to provide a roughened surface. This process is commonly known as "scarifying" concrete. The tool comprises a bit adapted to be mounted in a conventional roto-hammer or other type actuating mechanism that provides a reciprocating and/or rotating motion, the bit being provided with a multiplicity of carbide tips which are driven repeatedly into the concrete surface to effect scarifying thereof.

Abstract: Wood splitting tool comprises head with handle secured thereto. Head includes wedge having wood engaging portion and opposite top surface portion. Pin is secured to wedge and extends outwardly from top surface portion thereof, and impact weight is slidably mounted on pin. Enlargement at free end of pin prevents removal of impact weight so that upon swinging tool weight slides along pin and strikes top surface portion of wedge to provide second hit immediately after edge portion of wedge engages wood being split.

Abstract: A shearing tool for use in dismantling steel structures such as multi-story buildings takes the form of a large heavy inverted U-shaped steel member of a size enabling it to be elevated and dropped on a horizontal floor beam for example adjacent a vertical column to shear the same therefrom.

Abstract: A drilling bit for use in making a taphole in a blast furnace. The drilling bit has a bit head having a plurality of cutting tips radially arranged on and soldered to the bit head. Soldering of the tips to the bit head is carried out by the use of a soldering material of a particular composition containing 3 to 5% by weight of carbon, 0.5 to 3.0% by weight of silicon and the balance iron, the sum of the carbon content and the silicon content in the composition being at least 4% by weight relative to the total weight of the composition. Each of the tips which are to be soldered to the bit head by the use of the particular soldering material is made of either stellite or a super hard alloy.

Abstract: A cutting tool is especially adapted for use with a power driven hammer. The power driven hammer is held in one hand and the shank of the tool is inserted into a guide on the hammer. Preferably, the power driven hammer is adapted to move the tool through a very short distance at a very high frequency so that each individual movement transmitting force on the tool will be short. The tool body has cutting teeth for cutting into the workpiece under action of the tool. The depth and speed of cut of the tool can be varied in a number of ways. In one embodiment, the teeth have a plurality of laterally flat cutting edges disposed in a longitudinally curved array, and the angle which the tool makes with the workpiece determines the depth and speed of the cutting. In a second embodiment, the teeth are disposed in a substantially flat plane, and a pivot is provided to transmit force from the anvil to the tool through the shank therebetween.