Abstract: The invention relates to an impulse generator for a rock breaking tool, the impulse generator (2) comprising a main chamber (4) for receiving a first pressurizeable fluid volume (6), an in the main chamber (4) received impulse piston (8) which is arranged for transfer of pressure energy in the fluid volume (6) into impulses in the tool (10), and a on the side opposite the main chamber (4) side of the impulse piston (8) situated prepressurizing chamber (12) for receiving a second pressurizeable fluid volume (14), where the impulse generator (2) further comprises a on the side opposite the main chamber (4) side of the impulse piston (8) situated pressure relief chamber (16) for receiving a third pressurizeable fluid volume (18), where the relationship between the pressurizing pressures in the fluid volumes (6,14,18) and the relations between the areas of the impulse piston (8) facing the chambers (4,12,16) are such that pressurizing of at least the prepressurizing chamber (12) displaces the impulse piston (8) i

Abstract: A vehicle drive line (1), comprising an engine (2) provided with an outgoing crank shaft (3), a main transmission unit (4), an intermediate drive shaft (8) that connects the main transmission unit (4) with the crank shaft (3), the intermediate drive shaft (8) being connected to the crank shaft (3) through a second transmission unit (7), and being offset in relation to the crank shaft (3). The drive line (1) comprises a circuit through which a liquid used for lubricating the main transmission unit (4) is conducted to the second transmission unit (7) and used for cooling and lubrication purposes in the latter, and then conducted back to the main transmission unit (4).

Abstract: A device for rock bolting with an adapter device (10) for connection of a drilling machine (3) to a self drilling rock bolt (7), in which the adapter device has an adapter element (14) which is sealingly surrounded by a swivel sleeve (13) for connection to one or more external source for flushing medium (8) and bolt grouting medium (9), and in which the adapter element has a thread for connecting to a corresponding thread on the rock bolt (7), and an integral connection portion for connection to the drilling machine (3).

Abstract: Drill rod support (10) comprising means capable of moving two opposing drill rod support halves (20), each half (20) comprising a surface (21) for direct contact with the drill string (30), and the half being provided with a recess (23) capable of forming a drill string opening (22) with an opposing drill rod support half (20), the recess (23) being generally V-shaped, for enabling guiding of drill strings (30) of different shape and dimension. The invention is characterized in that the drill rod support halves (20) are movable to and from each other, for enabling contact with the drill string (30). The invention also relates to a drill rod support half (20) for use in such drill rod support.

Abstract: A device (5) for installing a pressure fluid expandable rock bolt (4) of the kind having a tubular expansion portion and a fitting portion, said device at a distal portion having chuck means for gripping the fitting portion and for establishing a sealed connection between a fluid source and the inlet, said device extending essentially in an axial direction. The device includes at a proximal portion a holder portion (11) that is adapted to be fitted to a drill string engagement element (27) of a rock drilling machine. The invention also concerns a method and a rig.

Abstract: A bumper beam (11) is fastened in two crash boxes (12). The top part and bottom part of each crash box form fastening tabs (34,35) against the top and bottom of the bumper beam (11) and each tab is fastened to the bumper beam with more than one bolt (36,37,57 58). A first hole (55) fits a first bolt (57) whereas the other hole/holes (56) permit for the bumper beam to turn a limited amount around said first bolt. Each tab is fastened to the bumper beam with more than one bolt and nut fastener (36,37,57,58). A first hole (55) fits a first bolt (57) whereas the other hole/holes (56) permit for the bumper beam to turn a limited amount around said first bolt. If a crash box is compressed in an off-set crash, the other crash box remains intact.

Abstract: A bumper beam is fastened to a bumper beam (11) of a vehicle (13) with intermediate crash boxes (12). Each crash box comprises a left member (20) and a right member (21) formed of sheet metal, which are jointed together and have top portions (24,25) overlapping each other and bottom portions (22,23) overlapping each other to form double-sheet tabs (34,35). These tabs extend out over the top and bottom surfaces of the bumper beam and are fastened to these surfaces.

Abstract: A bow-formed bumper beam for a vehicle has a hat profile with a central flange (11), two webs (12,13), and side flanges (14,15). The beam has fastening portions (20,21) at its sides where the side flanges form fastening areas (30-33) for fastening the beam to the vehicle with the central flange facing outwards. The profile height of the beam decreases continuously from the fastening portions towards the center so that the profile height is less than two third of the highest profile height at the fastening portions. The central flange is wider at its center than at its fastening portions and has a stiffener in the form of an elongate depression (16) that extends from the center of the beam towards the fastening portions. In the area between the fastening portions, the side flanges have bent edges (26,27) and in association with the beginning of the bent edges, the side flanges have transverse dents.

Abstract: The present invention relates to a method for controlling drilling parameters during an initial phase of rock drilling with a drilling machine. In accordance with the invention the percussion pressure and feed pressure of the drilling machine are controlled as continuously increasing functions during the initial phase. The present invention also relates to such a system.

Abstract: The invention relates to a sensor assembly in a gearbox which is used for positioning, where the sensor assembly comprises a relative to the gearbox housing (18) fixed sensor (20), and where the angle between the gearbox housing (18) and the output shaft (26) of a gearbox (14, 16) is measured using a to the output shaft (26) fixed and to the sensor (20) connected shaft (28), whereby a sensor assembly which measures the angle in the gearbox (14, 16) including the play in the gearbox (14, 16) is attained, which gives increased precision at the same time as gearboxes (14, 16) with play can be utilized for accurate angle positioning.

Abstract: The present invention relates to a method and an arrangement for controlling drilling parameters when rock drilling. The arrangement is arranged such that a drill tool is connectable to a drilling machine by means of one or more drill string components, wherein the arrangement comprises means for rotating the drill tool during rock drilling and for providing a tightening torque for tightening joints between one or more from the group: drill tool, one or more drill string components and drilling machine. The arrangement is arranged to control the rotational speed of the drill tool based on available tightening torque.

Abstract: The invention relates to an impulse generator (2) for a rock breaking tool, which comprises a propulsion chamber (6) for receiving a pressurizeable liquid volume (8), and an in the propulsion chamber (6) received impulse piston (10), where the impulse piston (10) is arranged for transfer of pressure peaks in the liquid volume (8) into impulses in the tool (12), whereby transfer of energy from a propulsion mechanism (14) into impulses in the tool (12) is effected by volume reduction of the propulsion chamber (6), whereby the impulse piston (10) is driven forward by a pressure peak in the propulsion chamber (6). The invention also relates to a hydraulic impulse tool comprising an impulse generator (2).

Abstract: A robot for medical ultrasonic examination has an articulated robot arm with a plurality of arm units (14-16), mounted one on the other to be pivotable, and a computerized system for controlling the movements of the arm, the outermost arm unit being arranged to carry a probe. The outermost arm unit has a carrying member rotatable about a longitudinal axis (IV), and carries a probe holder pivotable about a transverse axis (V) perpendicular to the longitudinal axis (IV). The probe holder has a housing rotatable about the transverse axis, and a holder sleeve rotatable about a longitudinal axis (VI). The three axes (IV, V, VI) intersect at a single point. The probe holder has an opening through which the probe can be inserted from the back and locked in position in the probe holder.

Abstract: A drilling unit, comprising a chassis (3, 4) and a drilling machine (1, 2) arranged in front of the same, the chassis encasing an engine-house (8), in which an engine (9) is arranged as well as at least one cooler (14) and at least one fan (15), the drilling unit comprising at least one partition wall (17) that divides the engine house (8) into a first part (18), which accommodates the engine (9), and a second part, which accommodates said cooler (14) and fan (15), and that the partition wall (17) extends transverse to the longitudinal direction of the chassis and divides the engine house (8) into a front part (18) and a rear part (19). The first part (18) of the engine house (8) forms the front part and the second part (19) of the engine house (8) forms the rear part.

Abstract: Slacking off device (24) for use on a drilling device (2) for rock drilling. The drilling device (2) comprises a rock drill (4) to which a drill string (10) is adapted to be jointed by means of a thread joint. The drill string (10) comprises an arbitrary number of drill rods (12, 14, 16) which are adapted to be jointed together by means of thread joints. The drilling device (2) comprises a driving device for forward and back rotation of the drill string (10). The slacking off device (24) comprises a clamping device (25) arranged to clamp up the drill string (10) and a separate striking device (33) arranged to strike with an angle towards the longitudinal direction of the drill string (10) of principally 75°-105° on a first (32) of any of said thread joints under back rotation so that an impressed torque on the drill string (10) is obtained in a thread slacking rotation direction to provide slacking of the first thread joint (32).

Abstract: Rotor unit for a centrifuge for purifying flowing fluids, which rotor unit (12) comprises a plurality of disk elements (14) which are stacked concentrically one on another and provided with at least one centrally located fluid flow-through hole, where the disk elements (14) have lead-through openings by means of which the disk elements (14) are pushed onto a number of essentially axially elongate guide elements (16) distributed in the circumferential direction for guiding the disk elements in the circumferential direction and radially. The disk elements (14) are held together by a first and a second end element (18, 20) at the ends of the stack of disk elements. A central portion of at least some of the guide elements (16) are interconnected by means of a cross-stay construction (36) in order to prevent deflection of the rods owing to the centrifugal force during rotation of the rotor unit (12).

Abstract: Housing arrangement 8 for a drill rig, especially adapted for damping sound, said drill rig comprising a feed beam holder 3, a feed beam 4 being movably attached to the feed beam holder 3 and having a drill end 41 and a rear end 42, and a drilling machine 5 being movably attached to and movable along the feed beam 4, said housing arrangement 8 comprising a casing 7, and said feed beam 4. The invention is characterized in that the casing 7 is directly attachable to the feed beam 4, such that the casing 7 and at least a part of the feed beam 4 enclose the drilling machine 5, and allows for mutual movement between the feed beam 4 and the feed beam holder 3.

Abstract: The present invention relates to an arrangement and to a method relating to a swing damper (1) for carrying a tool (5) that hands from a crane arm (2) or the like. The swing damper (1) includes an upper part (11) that is connected to the crane arm (2), and a lower part (12) that carries a working implement (5) or the like either directly or via a rotator (4), for instance. The upper part (11) and the lower part (12) are pivotally connected to one another via a pivot joint (13). The swing damper (1) also includes a brake arrangement (50). The brake arrangement (50) includes a brake unit (60) that has discs (70, 80) which are pivotal about the pivot shaft (14) of the swing joint (13), wherein at least one (70) of said discs is secured against rotation relative to the upper part (11), and wherein at least (80) of said discs is secured against rotation relative to said lower part (12).