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: Clamping tool provided of a tightening conditions display device comprising a body (11), containing control circuits and a processing electronic unit having at one end a handle (12) for gripping by an operator making the clamping, and on the other end an arm (13). Said arm comprises a seat (16) wherein can be alternatively pluggable a plurality of inserts suitable for engaging the tool with a corresponding type and/or dimension of a mechanical member on which the tool is destined to operate to carry out a clamping operation.

Abstract: A transducer for measuring the characteristics of a clamping instrument includes a stator which has an annular support adapted to form a substantially cylindrical longitudinal cavity adapted to receive a rotor which is also substantially shaped cylindrical adapted to rotate inside this cavity of the stator around its longitudinal axis, this rotor being provided at one end with a seat for insertion into it of the head of an instrument of tightening which determines such rotation around the axis, and a sensor arranged on its body capable of detecting specific parameters of the tightening of the instrument, and generating corresponding electrical signals. The transducer includes a magnetic coupling device adapted to transfer electrical energy from the stator to the rotor and an optical coupling device adapted to transfer the electrical signals generated by said sensor means from the rotor to the stator.

Abstract: The present specification relates to an electrically insulating tool cover assembly adapted to cover at least a front portion of a power tool, comprising a first and a second cover portion adapted to, in use, together cover the front portion of the power tool, and a releasable retaining element adapted to cooperate with a corresponding mating structure at the first and second cover portions, in order to hold the first and second cover portions together. The first and second cover portions and the retaining element are made of an electrically insulating material, such that in use, an electrical insulation may be provided for at least a part of the front portion of the power tool, and the first end is a front end of the tool cover assembly adapted to, in use, be arranged at the front end of the power tool.

Abstract: A clamping tool with tightening torque control includes a body containing control circuits and an electronic processing unit having at one end a handle for the grip of an operator who performs the tightening, and at the other end an arm. The arm at its free end includes a seat 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. On the arm there is a sensor adapted to detect the tightening torque exerted on the mechanical member.

Abstract: A power tool is arranged to operate in at least a first operating mode and a second operating mode. The power tool is operative to provide a first type of light signal from a light emitting device arranged to light up an object to be processed when the power tool is set in the first operating mode and to provide a second type of light signal when the power tool is set in the second operating mode.

Abstract: The present disclosure relates to a portable socket holder for sockets or bits connectable to a power tool. The portable socket holder comprising socket compartments for different types of sockets or bits. The portable socket holder further comprising visually indication means arranged to visually indicate a socket compartment. Further the portable socket holder comprising a processor and a memory containing instructions executable by the processor, wherein the portable socket holder is operative to visually indicate by means of the visually indication means a socket compartment. The portable socket holder further comprising tightening joint element compartments for different types of tightening joint elements. The portable socket holder further comprising visually indication means arranged to visually indicate a tightening joint compartment.

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: The present specification relates to a hand held power tool comprising a housing, the housing comprising a back handle portion at a back end thereof. And a front handle portion at a front end thereof, wherein a motor is arranged in the back handle portion and coupled to an outgoing axle extending through the front handle portion. Wherein the front handle portion comprises an inner tubular structure and an outer tubular gripping sleeve. The outer tubular gripping sleeve is circumferentially supported by at least two vibration absorbing resilient elements arranged around the inner tubular structure, such that a circumferential gap is formed between the inner tubular structure and the outer tubular gripping sleeve.

Abstract: The present disclosure relates to a power tool attachment part for a power tool. The power tool attachment part comprises an elongate 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 a power wrench, which input gear wheel is arranged at a first end of the housing, an output gear wheel with an output connection, which output gear wheel is arranged at a second end of the housing, at least one intermediate gear wheel, which is arranged inside the housing to transmit the rotation of the input gear wheel to the output gear wheel, and at least one torque sensor configured to measure a deformation of the elongated housing.

Abstract: A power tool attachment part for a power tool, comprising: an elongate housing including an upper housing part and a lower housing part interconnected with the upper housing part, an input gear wheel configured to be connected to an output shaft of a power wrench, which input gear wheel is arranged at a first end of the housing, an output gear wheel with an output connection, which output gear wheel is arranged at a second end of the housing, an intermediate gear wheel arranged inside the housing and configured to transmit rotation of the input gear wheel to the output gear wheel, a socket arranged concentrically with and radially inside the output gear wheel, and a torque sensor configured to measure the strain on the socket and thereby obtain a measure of the torque at the output gear wheel.

Abstract: A power tool attachment part for a power tool, comprising: an elongate housing including an upper housing part and a lower housing part interconnected with the upper housing part. An input gear is configured to be connected to an output shaft of a power wrench, which input gear is arranged at a first end of the housing. An output gear has an output interface. The output gear is arranged at a second end of the housing. A first intermediate gear is arranged inside the housing and configured to transmit torque of the input gear to the output gear. The first intermediate gear is rotationally mounted on a first intermediate gear shaft. A torque sensor is configured to measure radial forces acting on the first intermediate gear shaft to thereby obtain a measure of the torque at the output gear.

Abstract: An electric pulse tool performs a tightening operation in which torque is delivered in pulses to tighten a screw joint. The electric pulse tool includes an output shaft, a torque sensor to determine a torque value associated with tightening of the screw joint, and an angle sensor to determine an angular displacement of the screw joint. The tool provides low torque pulses of a torque value of less than 15 percent of an electric pulse tool max torque value on the output shaft until a low threshold torque value is reached. Next the tool starts measuring an angular displacement of an element of the screw joint and provides tightening torque pulses of a torque value of more than 15 percent of the electric pulse tool max torque value on the output shaft. The tool stops providing torque pulses on the output shaft when a target parameter is reached.

Abstract: The present disclosure relates to a power screw driver comprising a housing. The housing encloses a motor and a bit drive spindle at a front end for driving a bit. The power screw driver is at the front end connectable to a vacuum adapter having screw pick-up functionality by which a screw to be mounted is brought into engagement with the bit. The power screw driver further comprises an in the housing integrated vacuum sensor arranged to sense the sub-atmospheric pressure in the vacuum adapter.

Abstract: An electric pulse tool for performing tightening operations, where torque is delivered in pulses to tighten a screw joint, includes an output shaft, a sensor arranged to determine a parameter value associated with the tightening of the screw joint, a processor, and a memory containing instructions executable by the processor. The electrical pulse tool operates to provide torque pulses on the output shaft in a first direction until the determined parameter value associated with the tightening of the screw joint reaches within or above a predetermined first interval including a target parameter value. The electrical pulse tool also operates to provide at least one torque pulse on the output shaft in a second direction that is opposite to the first direction in case the determined parameter value exceeds the target parameter value within a predetermined second interval.

Abstract: The present specification relates to a power drill, comprising a housing in which a motor is arranged, and a front and rear bearing arranged to support an axle assembly adapted to engage a drill attachment, wherein said axle assembly and at least one of said front and said rear bearing further form an additional assembly movably arranged with respect to said housing, said power drill further comprising a force transducer arranged at said front end of said housing and axially supported by said housing, and wherein said additional assembly is axially supported by said force transducer, said force transducer thereby being configured to output a signal representing an axial force acting on said additional assembly. The present specification further relates to a force transducer for such a power drill and a detachable front part for a power drill.

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: An electric power tool includes an electrical motor adapted to drive a rotating shaft. The electric motor is adapted to be fed with a pulsed current where the pulsed current includes a main current pulse (A) in a first direction driving the rotating shaft in a first direction and adapted to provide a current (C) in an opposite direction following the main current pulse to retract the electrical power tool. The pulsed current prior to the current (C) in the opposite direction includes a first pre-pulse current pulse (B) in the same direction as the current in the opposite direction and of a magnitude lower than the current (C). The pulsed current prior to the main pulse includes a second pre-pulse current pulse (D) which is in the same direction as the main current pulse and of a magnitude lower than the main current pulse.