Abstract: Systems and methods for damping torsional oscillations of downhole systems are described. The systems include a downhole string comprising a disintegration device and a damping system at least one of in and on the downhole string, the damping system configured to damp torsional oscillations of the downhole string. The methods include installing a damping system at least one of on and in the downhole system with the downhole system including a downhole string having a disintegration device and the damping system is configured to damp torsional oscillation of the downhole string.

Abstract: A point chisel includes a substantially cylindrical shank and a working end region that tapers to a point. The working end region has at least three converging substantially planar surfaces, each with a protruding elongate rib extending along at least part of its length. Adjacent surfaces meet along at least part of their length at substantially straight edges between adjacent ribs. A flat chisel includes a substantially cylindrical shank and a working end region with a pair of converging substantially planar surfaces that include a plurality of protruding elongate ribs extending along at least part of its length. Each rib has, along the majority of its length, a substantially constant height above the surface from which it protrudes. Each chisel is made from steel, with the shank having a bainitic microstructure and the working end region having a martensitic microstructure.

Abstract: The invention relates to a tool for a breaking hammer, a breaking hammer, and the use of a breaking hammer. The breaking hammer includes a percussion device, the percussion piston of which providing impacts to the tool for breaking rock. An impact surface of the tool has a curved form surface that has a radius of curvature and a center axis on the longitudinal axis of the tool. The direction of the centre axis is transverse to the plane through the longitudinal axis of the boom of a work machine.

Abstract: A rock claw is provided for a demolition hammer. The rock claw may be a separate component attachable to the external surface of the hammer housing. The rock claw may include a first portion with a first distal end and a first proximal end and a second portion with a second distal end and a second proximal end. The first proximal end is joined to the second proximal end to form an elbow and the second distal end having a first leg spaced apart from a second leg.

Abstract: A percussion tool for a demolishing hammer or the like, comprises an elongated body that has a first portion aimed to be connected with the demolishing hammer and a second portion, opposite to the first portion, that includes a working bit. The two portions are made of mutually different materials and are rigidly connected by means of a connection member that can be applied outside the portions. Both portions of the tool have formations that can be engaged by corresponding formations of the connection member.

Abstract: In one embodiment a pick assembly comprises a rotatable drum comprising at least one block disposed on a circumferential surface of the drum. The at least one block comprises a cavity comprising a cylinder. A pick comprises a working end and an opposing base end wherein the base end is disposed within the cavity and comprises a piston that is slidably retained within the cylinder. In a second embodiment a pick assembly comprises a rotatable drum comprising at least one block disposed on a circumferential surface of the drum. The rotatable drum comprises a cavity comprising a cylinder. The at least one block comprises a first end and an opposing second end wherein the second end is disposed within the cavity. A pick comprising a working end is rigidly secured to the first end of the at least one block and the second end comprises a piston slidably retained within the cylinder.

Abstract: In one aspect of the invention, a high impact resistant tool includes a superhard material bonded to a cemented metal carbide substrate at a non-planar interface. The superhard material has a substantially pointed geometry with a sharp apex having a radius of curvature of 0.050 to 0.125 inches. The superhard material also has a thickness of 0.100 to 0.500 inches thickness from the apex to a central region of the cemented metal carbide substrate.

Abstract: A percussion tool for a demolishing hammer or the like, comprises an elongated body that has a first portion aimed to be connected with the demolishing hammer and a second portion, opposite to the first portion, that includes a working bit. The two portions are made of mutually different materials and are rigidly connected by means of a connection member that can be applied outside the portions. Both portions of the tool have formations that can be engaged by corresponding formations of the connection member.

Abstract: A vibratory milling machine has a vibratory housing confined to substantially linear reciprocating motion relative to a base, causing a tool carried by the housing to impact a mineral formation or other work piece substantially in a primary milling direction. The vibratory motion may be generated by two or more eccentrically-weighted rotors rotated by a common drive mechanism. The rotors may be arranged in pairs with the rotors of each pair rotating in opposite directions about parallel axes so that lateral oscillations cancel and longitudinal vibrations in the milling direction reinforce one another. In one embodiment, a hydrostatic fluid bearing is provided between the outer surface of each rotor and the housing.

Abstract: A cutting bit for impinging earth strata wherein the cutting bit includes a highly wear-resistant elongate cutting bit body, which has an axial forward end and an axial rearward end, an enlarged dimension head portion at the axial forward end and a reduced dimension shank portion at the axial rearward end. The highly wear-resistant elongate cutting bit body has a maximum transverse dimension and a longitudinal axial length. The cutting bit includes a superhard insert, which is affixed to the head portion at the axial forward end of the cutting bit body. The cutting bit has a slimness ratio, which comprises the ratio of the maximum transverse dimension to the longitudinal axial length wherein the cutting bit exhibits a slimness ratio ranging between about 0.15 and about 0.60.

Abstract: The invention is embodied in a percussion drill bit which comprises a steel body with a working front head portion having a front central zone and plural wing zones radiating from the central zone and being spaced at the outer circumferential edges thereof; first gauge-cutting PCD inserts are secured in the wing zones to extend forwardly at an angle relative to the axis of the bit, and of at least one second core-cutting PCD insert is non-axially secured to extend forwardly from the central zone.

Abstract: The invention relates to a bucket-, claw-, scraper-blade- or compacting-type attachment (1) which is intended to be fitted at one end (18) of a rock breaker (15) comprising a tool (17). The inventive attachment comprises: (i) means (7, 8, 9, 12) enabling the correct positioning thereof in relation to the rock breaker and the tool; and (ii) means (13, 14, 20) for fixing same temporarily and removably to the end of the rock breaker, without dismantling the tool (17).

Abstract: A formation breaking apparatus with increased wear-resistance is disclosed. In one aspect of the invention, the apparatus has an assembly attached to an end of an articulated arm. The assembly has an actuator in mechanical communication with an axially guided penetrator. The penetrator may have a body intermediate a proximate end and a distal end; the proximate end being adapted to communicate with the actuator, and the distal end comprising a hard material with a hardness of at least 63 HRc.

Abstract: A scaling apparatus comprises a hammer component and a pick component which includes a tooth. The apparatus also includes a mechanism for moving the pick component with respect to the hammer component to thereby impart a scaling force to and through the tooth. In a preferred embodiment of the invention, the pick component includes a pick body comprising a first pivot having a pivot axis and a tooth mounted on the pick body. In this embodiment of the invention, the hammer component includes a hammer housing and a second pivot mounted within the housing and adapted to pivotally engage the first pivot of the pick body. This embodiment of the invention also includes a mechanism for rotating the pick body relative to the hammer component so as to impart a scaling force.

Abstract: A channel chisel for forming a channel in a work piece, the channel chisel comprising a shaft having a longitudinal axis, a tip at one end of the shaft, wherein the tip has a cutting edge for cutting a work piece and a flute for removal of debris cut from a work piece, and at least one support member protruding from a side of the channel chisel, characterised in that the support member is adapted to abut and slide along a base of a channel to support the channel chisel in use, wherein support provided by the support member permits the channel chisel to pivot about the support member to change the angle at which the cutting edge cuts a work piece.

Abstract: A cup-shaped drill head with an inner conical surface (2) for force-locking connection with an exterior conical surface (3) of a driving drill shaft (4), which at the leading end changes over into a cup base (5) with a center point (P), whereby in the change over from the cup base (5) to the inner conical surface (2) a lesser curvature (K) is present than at the center point (P).

Abstract: An improved buster point assembly is disclosed. The improved buster point assembly has an elongated shaft attached to a replaceable tip. The replaceable tip includes a working end and a connecting end, the connecting end has a chamber for receiving a distal end of the elongated shaft.

Abstract: A rugged demolition system, and method for its use, for pulling up horizontal structures such as concrete or asphalt and breaking them into pieces, pulling over and breaking up vertical structures such as retaining walls and house/building walls, pulling up vertically extending objects from the ground such as tree roots, and breaking up hard or compacted surfaces such as dirt for easier grading. The system has a spear mounted horizontally to the top of a downwardly curving pry hook assembly, a digging tooth and optional side hooks connected to the pry hook assembly, and the pry hook assembly optionally secured to a tubular support member depending perpendicularly from a plate. Although any position-controlling vehicle can be employed to cause the needed vertical, horizontal, and rotational movement of the plate during system use, the plate is configured for attachment to the standard mount of a skid steer loader.

Abstract: An attack tool for working natural and man-made materials that is made up of one or more segments, including a steel alloy base segment, an intermediate carbide wear protector segment, and a penetrator segment comprising a carbide substrate that is coated with a superhard material. The segments are joined at continuously curved interfacial surfaces that may be interrupted by grooves, ridges, protrusions, and posts. At least a portion of the curved surfaces vary from one another at about their apex in order to accommodate ease of manufacturing and to concentrate the bonding material in the region of greatest variance. The carbide used for the penetrator and the wear protector may have a cobalt binder, or it may be binderless. It may also be produced by the rapid omnidirectional compaction method as a means of controlling grain growth of the fine cobalt particles. The parts are brazed together in such a manner that the grain size of the carbide is not substantially altered.

Abstract: An improved buster point assembly is disclosed. The improved buster point assembly has an elongated shaft attached to a replaceable tip. The replaceable tip includes a working end and a connecting end. the connecting end has a chamber for receiving a distal end of the elongated shaft.

Abstract: A pavement demolition hammer is removably fastened to a loader and includes a mounting plate securable to the loader. A framework is attached to the mounting plate and is provided with a lower spring and an upper spring spaced from the lower spring. A hammer handle has a proximal end pivotally mounted to the framework for swinging movement between the lower spring and the upper spring, and a distal end equipped with a hammer head adapted to engage the pavement. The loader applies a moving force to the mounting plate such that the lower spring is accelerated against the bottom of the handle causing the handle and the hammer head to swing upwardly from a pavement surface to be broken towards the upper spring. The handle and the hammer head return to the pavement surface either by gravity or acceleration from the upper spring against the top of the handle in a manner that the hammer head impacts and demolishes the pavement surface.

Abstract: A percussive rock drill bit includes a head portion with a forward surface surrounded by a peripheral surface. The peripheral surface supports a wreath of peripheral buttons. Front buttons are mounted to the forward surface inside the wreath of peripheral buttons. The button shave a diameter (D) and a height (H), wherein H/D<1.2. The buttons are welded to an essentially flat part of the forward surface whereby the buttons are metallurgically bound to the head portion.

Abstract: Two working pistons (AK1, AK2) strike on the anvil (10) of a drill device or a rock breaking device. One working piston (AK1) is a solid piston, while the other (AKZ) is an annular piston. Both working pistons can work at the same or substantially the same rate. In general, the percussion rate acting on the anvil (10) can be doubled with two working pistons. The working pistons can be controlled in common or independent from each other. In a synchronous mode with equal phase, the impact energy is multiplied; in an asynchronous mode or a mode with opposite phases, the percussion rate is increased.

Abstract: A breaker, used for breaking target hard objects, such as reinforced concrete structures, rocks or hard soil, using pneumatic and hydraulic pressure, is disclosed. In the breaker, the piston is multi-stepped to form first, second and third oil chambers between the piston and the cylinder. First, second, third and fourth oil paths are formed in the sidewall of the cylinder. The first oil path extends from the oil inlet port to the first chamber, thus feeding pressurized oil from an external oil source to the first chamber. A valve chamber is formed in the sidewall of the cylinder. The second oil path allows the valve chamber to selectively communicate with the second chamber. A directional control valve unit is installed within the valve chamber, and selectively returns the pressurized oil from the first chamber to the valve chamber prior to feeding the oil from the valve chamber to the second chamber through a plurality of oil ports and the second oil path.

Abstract: A percussion or hammer tool bit (20) having a substantially rearward shank portion (24) of a first diameter (ds) and an elongated substantially uniformly cylindrical forward tool portion (26) having a second diameter (dt) in the range of 15-20% greater than the diameter of the rearward shank portion. The overall tool length (Lo) is 90-95% of the overall tool length of the prior art (Lopa). The combination of the increased diameter of the forward tool portion and the decreased length of the overall tool length (relative to the prior art) provides substantially the same or greater mass than the prior art tool bit when the tool bit is used percussively, but is less likely to flex, which reduces the likelihood of stress fracture failure. The forward portion (26) includes a striking face (30), such as a blunt (31), moil point (31′), or chisel (31″).

Abstract: A rotatable cutting drum to be mounted on a machine for mining or for milling a surface such as a roadway. The drum is equipped with a set of movable bits or chisels which impact on the surface to be cut. The movable bits or chisels are impacted by pendulums mounted on a rotating cylinder mounted inside of the drum so that a percussive force is generated to assist cutting.

Abstract: The present invention relates to a partially enhanced drill bit (10') for percussive drilling. The bit comprises a bit body, at least one annular row of non-enhanced buttons (11') mounted in the bit body; and at least one annular row of enhanced buttons (12') mounted in the bit body radially outside of the non-enhanced buttons. At least one annular row of non-enhanced buttons (11') and said at least one annular row of enhanced buttons (12') are provided to partly overlap each other. There is an axial shoulder (19') radially outside of the non-enhanced buttons (11'). There are chamfers (20') at least partly surrounding the enhanced buttons (12'). These chamfers (20') interrupt the shoulder (19') in the circumferential direction.

Abstract: A trencher includes a frame. Ground engaging wheels and a chain are mounted on the frame. Sleeves are attached to and extend outwardly from the chain. Rotatable and fixed-orientation teeth can be mounted in the sleeves.

Abstract: A rock drilling tool for percussive drilling includes a drill bit and a drill tube cooperating by means of shoulder abutment in a threaded connection. The connection includes at least one male thread and a female thread. The male thread is provided on a shank being an integral part of the drill bit. The drill bit is provided with a shoulder at the inner end of the shank, the shoulder having an abutment surface facing towards the free end of the shank. The female thread is provided in the drill tube and the free end of the drill tube is provided with an impact surface. The threads are cylindrical. The combination of shoulder abutment with a short head provides straight energy transfer at a rock drilling tool.

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: An improved hammer tool (20) for a boom mountable power hammer (14) for use in demolishing a work surface (12) of concrete and the like. The hammer tool (20) includes an elongated cylindrical body (22) having a first end (24) and a second end (26). The first end, (24) has a shank (28) of a size and shape to be received into the commercial power hammer (14). A hammer head (30) includes a top (32) and a bottom (34). The top (32) connects the hammer head (30) to the second end (26) at a transition section (38). The bottom (34) includes a convex shaped radial striking face (40), which is a portion of a sphere having a center (54) within a portion of the body. In use, the shank (28) and a portion of the body (51) containing center (54) is received and supported within the power hammer (14). The hammer head (30) is raised and lowered to make striking contact with the work surface (12) in a number sufficient to demolish the work surface (12).

Abstract: A frustum cutting bit arrangement, including a shank portion for mounting in, and to be retained by, a rotary cutting tool body, the shank portion having an axis, an inner axial end, and an outer axial end. A head portion has an axis coincident with the shank portion axis, a front axial end, and a rear axial end, the rear end coupled to the shank portion outer end, and the front end having a conical cavity therein diminishing in diameter from the front end toward the rear end. A frustum cutting insert has an axis coincident with the head portion axis, a forward axial end, a back axial end, and an outer conical surface diminishing in diameter from the forward end toward the back end, the conical cavity and the outer conical surface having substantially the same taper, the frustum cutting insert fitting into the cavity in a taper lock.

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

Abstract: A tool and a method for performing at least one of removing and treating high strength surfacing. The tool includes a plurality of cutting spikes including sintered-carbide tips, and a common carrier for transmitting at least one of striking and vibration forces to the cutting spikes. The cutting spikes are disposed on the common carrier, and can be arranged on the common carrier in a plurality of rows, the rows being offset relative to one another in a longitudinal direction of the common carrier. The common carrier may be a chisel including a striking pin and a chisel shank merging into the striking pin. The tool can further include a plurality of blunt spikes distributed among and set back relative to the cutting spikes on the common carrier.

Abstract: An improved bifurcated drill bit is set forth. It has a shank for connection with a chuck, a cylindrical head having an outer face, and duplicate cutter faces. Each cutter is formed of PDC inserts which are cylindrical (or segments thereof). The PDC inserts are formed from a circular disk or ring which has an alignment hole in the center. When mounted, the insert presents a PDC face which bears against the drill hole. The drill hole is formed by cutting action of the inserts. Impact and shock loading occurs at the PDC surface.