Abstract: A handheld power tool includes a housing in which a motor coupled to an outgoing axle defining an axial direction is arranged, a front gear unit at a front end thereof, a first handle portion and a second supporting handle structure arranged at the front end of the housing and extending in a direction parallel to the axial direction in order to allow a user to support the tool at the front gear, and a first switch and a second switch configured to control a supply of energy to the motor. The handheld power tool is configured to require the user of the power tool to simultaneously operate the first switch and the second switch in order for energy to be supplied to the motor, and the second switch is arranged at the second supporting handle structure.

Abstract: A bolt tensioning tool is adapted to tension a bolt protruding from a workpiece, and includes a bolt receiving element adapted to be screwed onto the bolt, a nut socket adapted to receive a nut, an axle adapted to exert an axial force on the bolt receiving element, a threaded sleeve arranged to engage the axle and having an internal thread adapted to cooperate with an external thread of the axle such that a relative rotational movement therebetween results in a relative axial displacement between the axle and the threaded sleeve, a supporting sleeve coupled to the threaded sleeve and adapted to selectively bear against the workpiece, and a coupling adapted to connect the nut socket and the supporting sleeve, the coupling is a coupling allowing a limited relative movement between the socket and the sleeve.

Abstract: A hand held electric pulse tool performs tightening operations in which torque is delivered in pulses to tighten a screw joint. The tool includes an output shaft and a sensor to determine a parameter value associated with tightening of the screw joint. The tool is operative to provide torque pulses on the output shaft in a tightening direction until a first parameter value associated with the tightening of the screw joint is reached, then pause the tightening during a first time interval, and then provide torque pulses on the output shaft in a loosening direction until a second parameter value is reached. Next the electrical pulse tool is operative to pause the tightening during a second time interval and provide torque pulses on the output shaft in the tightening direction until a third parameter value is reached.

Abstract: A hydraulic screw tensioning device includes a tubular body, with a through opening and an annular cylinder chamber surrounding the through opening and a tubular piston movably supported in the tubular body and connectable to a screw to be tensioned. The tubular piston includes a stepped outer portion and divides the annular cylinder chamber into a first pressure chamber and a second pressure chamber. The second pressure chamber is closed by an annular end cap secured to the tubular body. The first pressure chamber is connectable to a pressure source for hydraulic fluid. The second pressure chamber is connectable to a pressure source for a compressible medium via a conduit connector mounted on the annular end cap. The conduit connector extends radially in relation to a geometric axis (A-A) of the tubular body. A damage protecting structure is provided to protect the conduit connector against accidental physical damage.

Abstract: A test bench for checking the correct functioning of a tightening tool, such as for example a torque wrench, comprising a fixed frame (2), which determines a work surface (21) on which one or more motorized cells (3) are positioned provided with a coupling (31) suitable for coupling with the tool head of a tightening tool, a movable frame (4) connected to the fixed frame by a movement means which allows the surface to be elongated along a longitudinal direction (X) of the bench for an adjustable length, said movable frame being equipped with first fixing means for the handle of the tightening tool to such movable frame, an electronic processing unit which controls these motorized cells and which is capable of imparting to the tool head of the tightening tool to be tested a rotation with predetermined values of tightening torque and angle of rotation.

Abstract: Method to check the correct functioning of a tightening tool, such as an industrial screwdriver, placed on a test bench. Said bench includes a plurality of hydraulic brakes (F1-Fn), to which the instrument is associated, suitably controlled by a hydraulic circuit. Each brake is equipped with measurement transducers (TR) capable of measuring the torque exerted and the angle of rotation on this brake, connected to an electronic driver card (SP), which also controls the hydraulic circuit. The bench also includes an electronic processing unit (U) which communicates with the card and which includes an adequate driving program memorized on it capable of regulating the braking capacity of the brakes through the hydraulic circuit according to a predetermined braking torque/angle of rotation curve of the brakes.

Abstract: A handheld power tool includes an actuator arrangement, which includes a movable trigger member and a sensor arrangement. The trigger member includes at least one magnetic element, and the sensor arrangement is responsive to a displacement of the magnetic element along with the movable trigger member relative to the sensor arrangement. The sensor arrangement includes an analog magnetic field sensor configured to provide a signal proportional to the position of the magnet, a first digital magnetic field sensor configured to provide a first digital switching point in response to the position of the magnet, and a second digital magnetic field sensor configured to provide a second digital switching point in response to the position of the magnet.

Abstract: The present specification relates to a torque transferring device for power tools, comprising a first portion comprising a first engaging structure arranged at a front end of the first portion and adapted to engage a corresponding mating structure to transfer torque thereto, and a second portion comprising a second engaging structure for connection to the output shaft of a power tool arranged at a rear end portion of the second portion, wherein the second engaging portion comprises an open cavity adapted to receive the output shaft of a power tool. The device further comprising a pin arranged at least partly in the open cavity, wherein the pin is arranged to extend in an axial direction and further arranged to, in use, engage a hole formed in the power tool output shaft.

Abstract: Braking device inserted in a test bench (2) for checking the correct operation of industrial screwdrivers, wherein the braking simulates a tightening operation of such screwdriver, comprising a container body (1) on the top of which a coupling (11) protrudes, suitable for coupling with the head (3) of the screwdriver to be tested, said coupling (11) being connected, by means of a shaft (12), to a braking unit (13), an electronic torque and angle detector (14) of the shaft rotation (12). Such braking unit (13) comprises a plate (14), rotated by the screwdriver, which is braked by suitable friction surfaces (15) moved towards the plate by the movement of an actuator; the movement of such actuator is performed by means of at least one electronically controlled piezoelectric element (17).

Abstract: The present specification relates to a two-speed power transmission for a power tool comprising a planetary gear and a torque responsive gear shift mechanism for directing torque through the planetary gear in a high torque/low speed mode or past the planetary gear in a low torque/high speed mode, and comprising a driving member, a driven member, and a number of coupling elements arranged to intercouple in a first position the driving member and the driven member and in a second position the planetary gear and the driven member, the driving member comprising a number of recesses and axially acting first cam means for cooperation with the coupling elements in the first position forming part thereof. The present specification also relates to power tool comprising such a gear unit and a method for controlling such a power tool.

Abstract: Tightening tool comprising a body (11), containing control circuits and an electronic processing unit having at one end a handle (12) for gripping by an operator performing the tightening, and at the other end an arm (13). Such arm at its free end comprises a seat (16) into which a plurality of inserts can alternatively be inserted, suitable for engaging the tool with a corresponding type and/or size of a mechanical member on which the tool is intended to act to perform a tightening operation. Sensor means are provided on said arm suitable for detecting tightening conditions exerted on said mechanical member. Such sensor means comprise at least one inertial measurement unit (IMU) connected to such electronic processing unit, capable of detecting tool rotations about the three cartesian axes (x, y and z) and direct accelerations along such axes.

Abstract: A constant-velocity joint assembly for a power tool includes an output shaft and a coupling structure configured to drive the output shaft. The output shaft and the coupling structure form a joint configured to enable angling of the output shaft relative to the coupling structure at constant rotational speed, and the coupling structure is provided with a torque transducer configured to detect a torque acting on the coupling structure provided by the output shaft.

Abstract: A power screwdriver includes a housing having a vacuum chamber arranged to communicate with a source of sub-atmospheric pressure. The power screwdriver includes a motor, a bit drive spindle, and a bit supporting sleeve connected to the bit drive spindle. The rear end part of the bit supporting sleeve is surrounded by the vacuum chamber. The bit supporting sleeve is journaled by a bearing between a forward end part and a rear end part of the bit supporting sleeve. The bit supporting sleeve includes at least one longitude vacuum passage extending from its rear end part to its forward end part.

Abstract: A torque transmitting assembly for a power tool comprising an angle head having a first output shaft which is rotational about a rotational axis and arranged to be connected to a power tool motor for transmitting a rotational movement from the motor to the first output shaft; a power tool attachment part having an input shaft connectable to the first output shaft, a second output shaft and a gear arrangement for transmitting rotational movement from the input shaft to the second output shaft; and fixation means for fixation of the attachment part to the angle head. The fixation means comprises first fixation means arranged to prevent axial displacement of the attachment part relative to the angle head; and second fixation means arranged to prevent rotation about the rotational axis of the attachment part relative to the angle head, which second fixation means is separate from the first fixation means.

Abstract: A torque transmitting assembly for a power tool comprising an angle head having a first output shaft which is rotational about a rotational axis and arranged to be connected to a power tool motor for transmitting a rotational movement from the motor to the first output shaft; a power tool attachment part having an input shaft connectable to the first output shaft, a second output shaft and a gear arrangement for transmitting rotational movement from the input shaft to the second output shaft; and fixation means for fixation of the attachment part to the angle head. The fixation means comprises first fixation means arranged to prevent axial displacement of the attachment part relative to the angle head; and second fixation means arranged to prevent rotation about the rotational axis of the attachment part relative to the angle head, which second fixation means is separate from the first fixation means.

Abstract: A method and a device for detecting the oil level in a hydraulic pulse unit at an impulse type power wrench, wherein the pulse unit comprises an oil filled pulse chamber, a motor driven inertia drive member, and a kinetic energy receiving member connected to an output shaft and intermittently coupled to the inertia drive member via an oil cushion to receive kinetic energy from the inertia drive member during repeated energy transfer phases. The rotation speed of the inertia drive member is measured both at the start of a pulse generating phase and at the end of that phase, wherein the two measured speeds are compared to each other, and when the speed at the end of the pulse generating phase exceeds the speed at the end of that phase by a certain percentage a faulty signal is emitted indicating a too low oil level in the pulse unit.

Abstract: A handheld electric power tool includes a drive train assembly arranged along a longitudinal axis of the tool, a housing adapted to receive the drive train assembly, and a retaining ring. The housing includes a first portion and a second portion adapted to form the housing, which has a conical outer surface portion having a substantially circular cross section. The retaining ring includes an inner surface having a conical inner surface portion adapted to cooperate with the conical outer surface portion such that a force is exerted on the first and second housing portions via the retaining ring as the conical inner surface and the conical outer surface are axially displaced with respect to one another, thereby urging the first and second housing portion together.

Abstract: A power tool attachment part for a power tool includes an elongated housing including an upper housing part and a lower housing part interconnected with the upper housing part. An input gear wheel for connection to an output shaft of the power tool is arranged at a first end of the housing. An output gear wheel with an output connection is arranged at a second end of the housing. At least one intermediate gear wheel is arranged inside the housing to transmit rotation of the input gear wheel to the output gear wheel. A magnet is arranged in the elongated housing, wherein the magnet is arranged to collect ferromagnetic particles.

Abstract: An attachment part for tightening joints includes an elongate housing including an upper housing part and a lower housing part, an input gear wheel for connection to an output shaft of a power wrench, arranged at a first end of the housing, an output gear wheel for connection to a joint to be tightened, arranged at a second end of the housing, and at least one intermediate gear wheel arranged inside the housing to transmit rotation of the input gear wheel to the output gear wheel, wherein each gear wheel has outer slanted teeth that connect the gear wheels and transmit said rotation there between.

Abstract: An attachment part for a power tool includes an elongated housing including an upper housing part, a lower housing part and an interconnection structure that interconnects the upper and lower housing parts. An input gear for connection to an output shaft of a power tool is arranged at a first end of the housing. An output gear with an output interface is arranged at a second end of the housing. The interconnecting structure includes a sleeve member extending through a first central bore at the first end of the upper housing part, which sleeve member receives the input gear, and a fixation member extending through a second central bore at the first end of the lower housing part and which is arranged to be secured to the sleeve member to clamp the upper and lower housing parts. A tool assembly includes a power tool and the attachment part.