Atlas Copco Industrial Technique AB Patent applications |
Patent application number | Title | Published |
20160138986 | A METHOD OF MEASURING ELONGATION OF A FASTENER WITH ULTRASOUND, PERFORMED BY A POWER TOOL, AND A POWER TOOL - The invention relates to a method of measuring elongation of a fastener by means of minimum peak side lobe (MPS) coded ultrasonic signals, and a power tool configured to performing the method. MPS coded signals with different base frequencies are transmitted into the fastener and a corresponding set of reflected signals are received from the fastener. Each reflected signal is cross-correlated with the corresponding transmitted signal, and a quality attribute of each transmitted signal is determined from the cross-correlated signals. Based on the quality attributes at least one parameter of an ultrasonic measurement signal is determined and the measurement is performed by transmitting the ultrasonic measurement signal into the fastener, and receiving a reflected ultrasonic measurement signal. | 05-19-2016 |
20160091343 | ROBUST ROTARY ENCODER FOR POWER TOOL - A displacement sensor for a power tool includes: a stator element, having a first conductive pattern, and a rotor element, having a second conductive pattern, for relative movement along a measurement path, wherein the first and second conductive patterns are mutually inductively coupled so that the first conductive pattern receives an excitation signal and the second conductive pattern generates an intermediate signal. The intermediate signal indicates relative displacement between the stator and rotor elements, wherein the excitation signal is a constant amplitude high-frequency signal. A signal processor circuit receives and processes a single phase receive signal corresponding to the intermediate signal to provide an output signal indicating relative displacement between the rotor and stator elements. A phase detector circuit processes the single phase receive signal to detect a phase difference between the receive signal and a reference signal corresponding to the excitation signal to provide the output signal. | 03-31-2016 |
20160061782 | SENSOR UNIT FOR ULTRA SONIC SOUND WAVE COMMUNICATION - A sensor unit for inducing and indicating ultra sonic sound waves in at least one threaded fastener by physical contact with an end surface thereof, wherein the sensor unit includes: a support casing, a sensor element with forward contact surface for engaging the fastener end surface and movable relative to the support casing between rest and active positions, and a bias spring between the support casing and the sensor element to urge the sensor element into the rest position as the sensor element is out of contact with the fastener end surface and to bias the contact surface of the sensor element into physical contact with the fastener end surface in the active position. The support casing includes a positioning socket, engaged by the sensor element in the rest position, having a non-cylindrical and non-circular cross sectional inner shape and congruent with an outer shape of the sensor element. | 03-03-2016 |
20160059379 | PNEUMATIC POWER TOOL WITH AN OVER-SPEED SAFETY DEVICE - A pneumatic power tool includes: a housing with a pressure air inlet passage, a rotation motor, a working implement carrying output shaft, and an over-speed safety device including: a valve element located in the inlet passage and shiftable between open and closed positions, a motor speed responsive actuating mechanism which can shift the valve element from an open to a closed position as motor speed reaches an accepted maximum limit, and a retaining unit which maintains the valve element in an open position at normal motor speed levels and releases it toward the closed position when actuated by the actuating mechanism. The retaining unit includes: a latch spindle having varying width in an axial direction and coupled to the actuating mechanism for displacement between valve element locking and releasing positions at the maximum speed limit, and a support surface and axially adjacently located one or more waist portions. | 03-03-2016 |
20160054721 | POWER TOOL - A power tool, which includes or is connectable to a computerised unit including a user interface, includes: a portable tool body supporting a motion sensor unit; and an activation unit by which the power tool may be set in two different modes, one production mode and one user interaction mode in which the power tool is configured to provide data from the motion sensor unit to interact with the user interface, such that a movement of the tool body is translated into an input to the user interface. | 02-25-2016 |
20160049817 | POWER TOOL WITH STEP-UP CONVERTER - A power tool, includes an electrical motor unit connectable to a battery unit, wherein: a step-up converter, connectable between the battery unit and electrical motor unit, converts a battery voltage U | 02-18-2016 |
20150316435 | METHOD AND APPARATUS FOR EVALUATING CLAMP FORCE IN A BOLT BY MEANS OF ULTRA-SONIC MEASUREMENTS - In an apparatus and a method of evaluating a clamp force (F) in a threaded joint between a bolt and a matching threaded piece during a tightening operation, a torque (T) provided to the joint is continuously measured and ultra-sonic pulses are simultaneously induced into the bolt such that a time of flight (TOF) of the pulses in the bolt is measured. In response to an increase of the measured torque (T) an increase rate (dT/dα) of the torque (T) is determined, from which an initial rotation angle (α | 11-05-2015 |
20150314427 | POWER TOOL ATTACHMENT PART - 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. | 11-05-2015 |
20150298305 | IMPULSE WRENCH WITH PUSH START FEATURE - An Impulse wrench includes: a housing, a motor with a stator and a rotor, an impulse unit including an output shaft, a power control unit connected to the motor, and a trigger supported on the housing and connected to the power control unit and arranged to selectively deliver signals to activate the power control unit, wherein the impulse unit including the output shaft is axially displaceable in relation to the housing. The trigger includes a sensor arranged to be activated and deliver signals in response to axial displacements of the impulse unit including the output shaft relative to the housing, and the power control unit is arranged to control the motor operation in response to signals received from said sensor. | 10-22-2015 |
20150273596 | DRILLING TOOL WITH A FLEXIBLE SPINDLE FEEDING - A drilling tool includes a spindle, a housing at least partly housing the spindle, a feed gear drivingly connected to a motor and threaded around the spindle to feed the spindle in an axial direction of the spindle by mutual rotation between the feed gear and spindle during a drilling process, and a micro peck unit which includes an undulated cam profile and a follower arranged to bear against the cam profile, and which produces an oscillating movement of the feed gear and the spindle upon rotation of the feed gear during a drilling process. The micro peck unit further includes interposable rolling elements arranged to be re-positioned into a gap between two circular contact surfaces in order to separate the cam profile from the follower, such that no oscillating movement is produced by the unit when the interposable rolling elements are positioned inside the gap between the contact surfaces. | 10-01-2015 |
20150177098 | METHOD AND APPARATUS FOR COMBINING TORQUE AND ANGLE REPRESENTATION - An improved method and apparatus for creating a representation of transferred torque (τ | 06-25-2015 |
20150158138 | POWER TOOL - A hand held power tool includes: a motor room housing a motor that drives an output shaft; a bevel gear including interconnected pinion and crown gears, wherein the pinion gear is connected to a pinion shaft drivingly connected to the output shaft and the crown gear is drivingly connected to a tool holding shaft; a gear housing that delimits a fluid tight gear space around the bevel gear; a bearing, around the pinion shaft and close to the pinion gear, which delimits a confined space around the pinion shaft and within the gear space; and a fluid tight axial sealing, around the pinion shaft inside the confined space of the gear space, which seals off the gear space from the motor room. At least one fluid conveying opening is arranged to put the confined space of the gear space in fluid contact with the rest of the gear space. | 06-11-2015 |
20150147212 | REVERSIBLE PNEUMATIC VANE MOTOR - A reversible pneumatic vane motor includes a stator housing with a pressure air inlet passage and an exhaust air outlet passage, a cylinder supported in the stator housing, a vane carrying rotor rotatable in the cylinder and forming a clearance seal portion with the cylinder, air communication ports located at opposite sides of the seal portion for supplying motive pressure air or scavenging exhaust air from the cylinder, a primary outlet diametrically opposite the clearance seal portion, and a directional valve for connecting alternatively the air communication ports to the pressure air inlet passage and the exhaust air outlet passage. The motor also includes auxiliary outlet ports which are located between the primary outlet and each one of the air communication ports, and the directional valve includes control parts for opening up and closing, respectively, communication between the auxiliary outlet ports and the atmosphere via the exhaust air outlet passage. | 05-28-2015 |
20150069852 | TRANSMISSION OF SIGNALS THROUGH A NON-CONTACT INTERFACE - A bi-directional transmission system for transmission of signals through a non-contact interface includes a transformer inductively coupling a first circuit to a second circuit. The second circuit includes at least a first transmitter circuit arranged to translate a first digital input signal into at least one voltage pulse and to provide the at least one voltage pulse to a first winding of the transformer, wherein the at least one voltage pulse takes a positive or negative form based on whether the first digital input signal has a positive or negative edge. The first circuit includes at least a first receiver circuit arranged to receive at least one induced voltage pulse from a second winding of the transformer and to provide a first digital output signal reflecting the first digital input signal based on the at least one induced voltage pulse. | 03-12-2015 |
20140245847 | SCREW ACTUATED PRESS UNIT - A screw actuated press unit for mounting parts with press fit includes a casing, an actuating screw rotationally journalled in the casing and coupled to a rotation motor, a nut assembly cooperating with the actuating screw, a thrust rod rigidly connected to the nut assembly and extending out of the casing for connection to a work piece, and a locking device effective to rotationally lock the nut assembly to the casing at rotation of the actuation screw, wherein the lock device includes at least three roller studs mounted on and radially extending from the nut assembly and arranged to guidingly cooperate with two parallel guide rails at the edges of an axially extending slot in the casing . The roller studs are spring biased in opposite directions in contact with the guide rails so as to eliminate rotational play between the nut assembly and the casing. | 09-04-2014 |
20140183329 | POWER TOOL HOLDER - The invention concerns a power tool holder which includes at least two clamping parts mutually movably connected to each other by at least one adjustable connection part, the at least two clamping parts each having a clamping surface which face each other and have a clamping space formed between them, wherein a power tool can be clamped by an adjustment of the connection part to move the clamping parts together. At least one clamping part includes at least one through hole located adjacent to the clamping surface of said clamping part, such that the clamping surface will flex when subjected to pressure on clamping a power tool. | 07-03-2014 |
20140145811 | TRANSFORMER INCLUDING A CONTACTLESS SIGNAL CONNECTION - An improved transformer for use in a power tool, wherein the power tool includes a stationary body and a shaft which is movable relative to the body. The transformer includes a stator which is fixed relative to the body, and at least one stator winding. The transformer also includes a rotor which is movable with the shaft, and at least one rotor winding. A magnetic field is shared by the at least one stator and rotor windings, and is used for creating a contactless signal connection between the body and an at least one sensor of the shaft. The stator and the rotor are arranged in a mutual geometrical relationship such that the contactless signal connection is provided for different positions in both an axial direction and a rotational direction of the shaft. | 05-29-2014 |
20140124228 | ELECTRIC POWER TOOL - An electric torque delivering impulse tool includes a housing with a front end and a back end, an electric torque delivering motor with a rotor that is arranged to rotate with respect to a stator, an output shaft arranged at the front end of the housing, and a pulse unit intermittently coupling the motor to the output shaft, wherein the pulse unit includes an inertia drive member that is connected to the rotor. The rotor and the inertia drive member are rigidly assembled to each other without play so as to form one integrated rotatable structure which is mounted as one single unit inside the housing. | 05-08-2014 |
20140034346 | SPEED CONTROL DEVICE FOR GOVERNING THE SPEED OF A PNEUMATIC POWER TOOL - A speed control device for limiting the idle and operating speed of a pneumatic power tool driven by an air turbine ( | 02-06-2014 |
20140026723 | POWER WRENCH WITH A TORQUE SENSING UNIT - A power wrench with a torque sensing unit includes a housing, a motor, an output shaft, and a planetary reduction gearing connecting the motor to the output shaft and including a stationary ring gear supported in the housing, wherein the torque sensing unit includes a torque transferring element with a single radially extending reaction arm arranged to transfer reaction torque from the ring gear to the housing and carrying strain measuring sensors for generating signals in response to the transferred reaction torque. The torque transferring element includes an annular body with two weak portions to be elastically deformed during torque transfer and having flat surfaces for carrying the strain measuring sensors. | 01-30-2014 |
20140013564 | METHOD FOR TIGHTENING SCREW JOINTS WITH A HAND HELD POWER TOOL - A method for tightening a screw joint up to a predetermined target torque level (T | 01-16-2014 |
20130324156 | LOCATION SYSTEM FOR DETERMINING THE POSITION OF AN OBJECT - A location system for determining the position of a movable object ( | 12-05-2013 |
20130277078 | PORTABLE ELECTRIC POWER TOOL WITH RADIO COMMUNICATION DEVICE - A portable electric power tool including a housing ( | 10-24-2013 |
20130192389 | METHOD FOR DETERMINING THE QUALITY OF A SCREW JOINT TIGHTENING PROCESS PERFORMED BY AN IMPULSE WRENCH - A method for determining the quality of a screw joint tightening process performed by means of a torque impulse wrench, comprising clamp load determination via calculation of the time of flight for ultra sonic waves induced into the screw joint, and comparing of a total rotation movement of the screw joint with predetermined angle limit values as a target axial load level has been indicated by the time of flight of ultra sonic waves induced in the screw joint. Occurring discrepancies between the obtained total rotation movement of the screw joint and the angle limit values would indicate a faulty screw joint and/or a malfunctioning ultra sonic wave flight time measurement, which means an unacceptable tightening process quality. | 08-01-2013 |
20130180748 | PNEUMATIC TORQUE IMPULSE WRENCH WITH STEPPED SHUT-OFF FUNCTION - A pneumatic torque impulse wrench comprises a housing ( | 07-18-2013 |
20130104702 | REACTION BAR LOCK NUT | 05-02-2013 |
20130056237 | POWER WRENCH WITH HYDRAULIC PULSE UNIT - A power wrench has a rotation motor, and a hydraulic pulse unit. The pulse unit includes an inertia drive unit connected to the motor. The inertia drive unit includes an oil chamber with an impulse generating mechanism, and an output spindle extending into the oil chamber to receive torque impulses. The inertia drive unit has a cylindrical member defining the oil chamber, a rear end wall, and an air separator element co-rotating with the wall and having a substantially axially facing surface which together with a congruent surface on the rear end wall forms oil passages in the form of a clearance gap through which oil mixed with air is circulated between one or more oil inlet openings, past one or more air outlet openings, to one or more oil outlet openings. Air is extracted from the oil and is gathered in a centrally located air collecting chamber. | 03-07-2013 |