Abstract: Disclosed is a fire suppression system, a valve for the system, and a movable valve member for the valve. The system includes a reservoir for a fire suppressant material. The reservoir has an outlet, at least one nozzle from which the suppressant is delivered, and a valve governing passage of the suppressant to the nozzles. The valve includes a movable valve member and first and second valve seats cooperating therewith. The valve member is movable from a first position seated with respect to the first valve seat preventing communication between the reservoir and the nozzles, to a second position seated with respect to the second valve seat permitting suppressant flow from the reservoir to the nozzles and preventing suppressant flow to an actuator operatively associated with the valve to selectively cause movement of the valve member from the first position to the second position.

Abstract: A drill body for chip removing machining, including an envelope surface which is concentric with a center axis around which the drill body is rotatable, and transforms into a front end surface, and a front cutting edge adjacent to a chip flute which is countersunk in the envelope surface in the area in front of the cutting edge as viewed in the direction of rotation of the drill body and runs out into the front end surface. In the front part of the chip flute, a depression is formed, which includes two part surfaces extending at an obtuse angle (?) to each other, one of which forms a bottom surface in the depression, and the other of which faces the cutting edge and is in front of the cutting edge as viewed in the direction of rotation to form a stop face for a chip removed by the cutting edge.

Abstract: A back reamer includes a drive stem configured to support a main reamer body, the main reamer body including a plurality of receptacles, and a plurality of cutting leg assemblies in positive locking engagement with the plurality of receptacles to restrict radial movement of the cutting leg assemblies.

Abstract: A milling tool is disclosed having a front head and a rear holder, which are detachably connected by means of a male/female coupling as well as a screw and a washer. Via a main duct, cooling liquid is fed to a chamber, from which it is fed out via branch ducts to individual milling inserts. The front chamber is closed by means of a cover that is held applied against a ring surface surrounding the chamber. The cover is tightenable by means of a threaded joint that is operative independently of a threaded joint between the screw and a front section of the main duct.

Abstract: A supporting structure for different screening media on a vibrating screen is disclosed, as well as a support carrier of the supporting structure. The supporting structure is received on a vibrating screen and has a number of support carriers arranged parallel to each other and perpendicular to a number of transversal carriers. The support carriers and the transversal carriers form a grid. The support carriers have grooves at each end to be snapped on and locked on circular ribs on top of the transversal carriers. The support carriers are made of a polymeric material and are elongated elements.

Abstract: A drill bit for attachment to an elongate drill rod, the drill bit including means for attachment to an end of the drill rod, and a leading end which defines a pair of diametrically opposed slots which open axially for receipt of a portion of a drill tip which projects axially from the slots. The drill tip being fixedly secured within each of the slots. Further, a drill rod or a self drilling roof bolt comprising the drill bit.

Abstract: Rotary cutting apparatus has a frame, a first rotary device and a second rotary device. Each of the first and second rotary devices has a shaft concentrically arranged about a rotational axis and a drum and are arranged in the frame in such a way that said first and second axes are substantially horizontal and substantially in the same vertical plane. A pair of bearing housings is arranged on either side of each of the drums. A first pair of bearing housings is movable relative to the frame in a transverse direction to the first rotational axis by means of a force means. Means is provided for passive vibration attenuation of at least the first shaft, the means being able to reduce vibrations due to impacts of the first drum in relation to the second drum.

Abstract: Rotary cutting apparatus has a frame, a first rotary device and a second rotary device. Each of the first and second rotary devices has a shaft concentrically arranged about a rotational axis and a drum and are arranged in the frame in such a way that said first and second axes are substantially horizontal and substantially in the same vertical plane. A pair of bearing housings is arranged on either side of each of the drums. A first pair of bearing housings is movable relative to the frame in a transverse direction to the first rotational axis by means of a force means. Means is provided for passive vibration attenuation of at least the first shaft that includes a mass damper having a housing and a damping body movably arranged inside the housing, wherein the mass damper is associated with the first pair of bearing housings.

Abstract: The present invention relates to a cuffing insert for turning in heat resistant superalloys and stainless steels comprising a very fine grained hard substrate and a coating. The substrate comprises WC from about 5 to about 8 wt % Co and from about 0.3 to about 1.5 wt % Cr. In addition to that ppm levels of Ti and Ta are present. The ratio of Me/Co=(at-% Ti+ at-% Nb+ at-% Ta)/at-% Co is lower than or equal to about 0.014?(CW_Cr)*0.008 and higher than about 0.0005. The average sintered WC-grain size is from about 0.5 to about 0.95 ?m and CW_Cr from about 0.75 to about 0.95. The cemented carbide body is coated with a PVD TixAl1-xN-coating with an average composition of x being greater than about 0.4 but less than about 0.9, present as a single or multilayer coating with a total thickness of from about 1 to about 6 ?m.

Abstract: A cutting or milling insert for rotatable tool for chip removing machining and of the type that comprises a cutting edge in a transition between a front chip surface and a clearance surface extending rearward from the same. Remotely behind the first-mentioned cutting edge, a second cutting edge is formed in a transition between, on one hand, a second chip surface behind the first clearance surface, and, on the other hand, a trailing second clearance surface. The spacing between opposite sections of the front cutting edge is greater than the corresponding spacing between opposite sections of the second or rear cutting edge, the cutting edge angle (?) of at least the front cutting edge being acute. A rotatable cutting tool, which is equipped with the cutting or milling insert is also provided.

Abstract: The present invention relates to a method of producing a cemented carbide body comprising providing: (1) a grain refiner compound comprising a grain refiner and carbon and/or nitrogen, and, (2) a grain growth promoter, on at least one portion of the surface of a compact of a WC-based starting material comprising one or more hard-phase components and a binder, and then sintering the compact. The invention also relates to a cemented carbide body comprising a WC-based hard phase and a binder phase, wherein at least one part of an intermediate surface zone has a lower average binder content than a part further into the body, and at least one part of an upper surface zone has in average a larger average WC grain size than the intermediate surface zone. The cemented carbide body can be used as a cutting tool insert for metal machining, an insert for a mining tool, or a coldforming tool.

Abstract: A cutting tool includes a polygonal cutter body and an end cutting insert for chipforming machining mounted in a serrated seat disposed at an axial end of the cutter body. A bottom surface of the insert has a plurality of parallel serrations meshing with corresponding serrations of the seat. The serrations extend transversely relative to the longitudinal axis for resisting axially rearward cutting forces applied to the insert. The seat is formed directly by the cutter body, or by a shim disposed beneath the insert. The shim is provided with a downward lip to transfer axial forces to the cutter body. The insert can be square or triangular, wherein the serrations are in the form of a plurality of sets of parallel serrations disposed adjacent respective cutting edges.

Abstract: A threaded joint interconnects male and female parts of rock-drilling equipment, the female parts including an internal trapezoidal thread in the form of a helix thread ridge, which is delimited by a top and two flanks, a groove, having a bottom, running between two tops, and which thread ridge extends a plurality of turns between a front end and a rear end, the thread top touching an imaginary cylinder or cone that is concentric with a center axis of the female part. The bottom of the thread groove has a concave and partially circular cross-section shape along at least a part of the extension of the groove, and transforms into flanks via concave radius transitions, the radii of which decrease in the direction from the front end of the thread toward the rear one, at the same time as the radius of the groove bottom increases in the same direction.

Abstract: A terminal for electrical resistive elements of molybdenum silicide or alloys of this material, which terminal is arranged to pass through a furnace wall or a furnace ceiling or corresponding insulated wall, where the terminal located at each end of the hot zone of the element has a diameter that is larger than the diameter of the element in the hot zone. The invention is characterised in that a terminal connector is connected to each terminal, in that the terminal connector is made from aluminium, in that the terminal connector has a length that fully or partially constitutes the length of the combined terminal length, where the combined terminal length is the length of the relevant terminal of the element and the terminal connector.

Abstract: A female part intended for top hammer-drilling equipment includes a thread in the form of a ridge in a wall. The ridge is delimited by a crest and two flanks between which a likewise helical groove having a bottom runs. An end the of the groove is defined by a borderline, which separates the groove bottom from a part surface formed in the inside of the wall, the width of which part surface successively decreases in the peripheral direction, and which has a rotationally symmetrical shape essentially similar to the rotationally symmetrical basic shape of the thread.

Abstract: The present invention relates to a cutting tool for metal machining with improved wear properties, comprising a cutting tool substrate of cemented carbide, cermet, ceramics or a super hard material, and a wear resistant coating, wherein the wear resistant coating comprises a PVD Ti—Si—C—N layer, and a method of making thereof.

Abstract: Milling tool has a tool body with a fixing end, an opposite outer end, and a peripheral surface. The tool body comprises a large number of separated seats arranged at the peripheral surface one after the other along a helix line having a constant pitch. Corresponding large number of replaceable milling inserts comprise an under side, an opposite upper side forming a chip surface, a circumferential edge side, and two pairs of main cutting edges. The chip surface extends in an extension plane that comprises the main cutting edges. Each seat receives one of the milling inserts and comprises a support surface allowing support to the milling insert projecting from the tool body for cutting engagement with a gash of the workpiece. The chip surface extension plane of each milling insert has a normal parallel to the tangent of the helix line where the same intersects the extension plane.

Abstract: A cutting insert for a gear milling tool comprises an under side, an opposite upper side that forms a chip surface and is parallel to an extension plane (p), a circumferential edge side that connects the upper side and the under side. A centre axis (A) extends through the under side. A symmetry line (S) is perpendicular to the centre axis. A first cutting edge comprises a primary main cutting edge, a secondary main cutting edge—which are symmetrical in respect of the symmetry line—and a transverse end cutting edge between the primary and the secondary main cutting edge. A normal to the extension plane (p) forms an acute clearance angle with the edge side at least along the first cutting edge so that the cutting insert obtains a positive cutting geometry.

Abstract: A gyratory crusher includes a crushing head, which is arranged rotatably on a substantially vertical shaft and on which a first crushing shell is mounted, and a frame, on which a second crushing shell is mounted, which second crushing shell, together with the first crushing shell, delimits a crushing gap. A supporting piston is arranged inside a cavity of the shaft, which supporting piston is displaceable in the vertical direction in order to adjust the width of the crushing gap. An eccentric is, by means of at least one radial bearing, arranged rotatably about the shaft. The gyratory crusher has an oil line, arranged in the cavity and extending through a piston plate included in the supporting piston, for supplying lubricating oil to a lubricating oil chamber configured at least partially in the cavity above the piston plate, the lubricating oil chamber being connected to the radial bearing by a duct arranged in the shaft.

Abstract: The present invention relates to a shutter system operable between an open position, and a closed position operable to avoid unintended exposure of a surface to radiant flux, wherein said shutter system comprises at least one pair of shields, and an axis for each shield, wherein a first axis is connected to an end part of a first shield, and coincides with the turning axis of the first shield, wherein a second axis, in the shape of an angled arm, is connected to an end part of a second shield and the turning axis of the second shield is parallel to the turning axis of said first shield and is arranged at a distance from the second shield.