Abstract: A method for imaging a structure composed of at least one wave guide connected to a junction, the structure supporting elastic wave guided propagation modes, the method includes the following steps: for at least one operating frequency, acquiring a plurality of measurements of signals propagating in the structure by means of a plurality of pairs of non-colocalized elastic wave sensors, determining a plurality of propagation modes guided by the structure, correcting the measurements on the basis of ultrasound signals measured or simulated for the same structure in the absence of any defect, converting the measurement matrix M into a wave field scattering matrix U, determining, at each point of a sampling grid, a test vector F characteristic of the structure without any defect, applying a numerical inversion method to determine a vector H of modal components such that U.H=F at each point of a sampling grid, determining an image of the structure on the basis of the vector H.

Abstract: Disclosed herein is a power tool comprising a motor, a drive shaft connected to the motor, a front end defining a cavity comprising a tool side end and a free end, and a coupling mechanism for releasably connecting a removable tool head to the drive shaft. The coupling mechanism comprising two sleeves, a first and a second biasing element and at least one ball that together either put the coupling mechanism in an open position ready to receive the removable tool head or into a closed position upon manual dislocation of the inner sleeve during insertion of another tool head, so that the at least one ball can glide into at least a partial engagement with a recess on the removable tool head and is locked there via the inner projection of the outer sleeve, which outer sleeve is held in position by the first biasing element.

Abstract: The present application provides a microsphere comprising a lactic acid-glycolic acid copolymer (PLGA) or polylactide (PLA) as a main component, in which a biologically active substance is uniformly dispersed, wherein an average volume-based particle diameter of the microsphere is 1 ?m or more and 150 ?m or less, and a variation coefficient of area ratios in six regions is 0.35 or less, wherein the area ratios in six regions are calculated by (s/A)×100 (%) wherein the six regions are prepared by preparing a cross section observation sample obtained by cutting the microsphere; observing the cross section observation sample with an electron microscope at a magnification capable of confirming the biologically active substance in the microsphere or a higher magnification; and dividing the electron microscope observation image into six regions; and A is an area of a respective divided region, and s is a sum of cross section areas of the biologically active substance included in the respective divided region.

Abstract: A method of controlling an electric motor of a tightening tool during a tightening operation, the method comprising: a) controlling the electric motor to run at a first motor speed using a first motor speed setpoint value, b) obtaining a torque or motor current value of the electric motor, c) determining a second motor speed setpoint value lower than or equal to the first motor speed setpoint value, based on an efficiency of the tightening tool at the torque or motor current value and the first motor speed setpoint value, d) setting the second motor speed setpoint value as the first motor speed setpoint value, e) controlling the electric motor to run at a second motor speed using the first motor speed setpoint value after step d), and repeating steps b)-e) until a predetermined motor speed or torque has been reached.

Abstract: The present specification relates to a power tool comprising an input shaft and an output shaft and a two-speed power transmission comprising a planetary gear and a gear shift assembly for directing torque through or past the planetary gear comprising a driving member, a driven member and an axially movable coupling sleeve arranged to intercouple in a first position the driving member and the driven member and to intercouple in a second position the planetary gear and the driven member. A linear actuator is arranged to displace the coupling sleeve between the first and second position, wherein the linear actuator comprises a linearly movable push bar arranged for displacing the coupling sleeve. The present specification also relates to a method in and a two-speed power transmission for such a power tool.

Abstract: An ultrasound treatment appliance comprising a surgical handpiece, an ultrasound insert, and an ultrasound generator, the handpiece including a piezoelectric transducer connected to the ultrasound insert and a piezoelectric motor connected to the ultrasound generator. The piezoelectric motor transmits ultrasound waves to the insert, which waves are defined as a function of current and voltage setpoint signals delivered by the ultrasound generator to the piezoelectric motor. The appliance also includes a module for controlling the amplitudes of the setpoint signals and configured to increase or decrease the amplitudes of the current and voltage setpoint signals when the variation in the impedance of the ultrasound signal is greater than a predetermined impedance variation value and when the variation in the frequency of the ultrasound signal is greater than or less than the predetermined frequency variation value.

Abstract: A vacuum deaerator degasses material to be processed by placing a rotating rotor with a screen in a vacuum vessel, introducing a liquid material to be processed into the rotor from the interior thereof and causing the liquid to pass through the screen to refine the same. The vacuum deaerator is characterized in that: the screen is a cylinder with a circular cross-section and is in the form of a porous plate in which a plurality of through holes are opened in the radial direction of the cylindrical screen; and the screen is provided such that the area of inflow openings is greater than the area of outflow openings, where the inflow openings are openings of a plurality of penetration portions provided on the inner wall face of the screen and the outflow openings are openings of the plurality of penetration portions provided on the outer wall dace of the screen. Thus, the processing capacity of the vacuum deaerator is improved without increasing the size of the device.

Abstract: A socket for a power tool, the socket being arranged to rotate about a socket axis and comprises a cylindrical section having an end surface, a plurality of engaging surfaces parallel with the socket axis on an internal side of the cylindrical section; an inner section positioned radially inside the cylindrical section with respect to the socket axis and having a stopping surface offset from the end surface such that the engaging surfaces are positioned between the stopping surface and the end surface; and a socket opening extending radially with respect to the socket axis through the cylindrical section and the inner section; wherein the cylindrical section comprises at least one internal slope on the internal side of the cylindrical section extending away from the stopping surface. Methods, control systems and power tools are also provided.

Abstract: A method for determining a tightening class of a tightening operation performed by a tightening tool is provided. The method comprises acquiring time-domain representations of sets of observed torque and angle values for fasteners having been tightened by the tightening tool, acquiring frequency-domain representations of the observed sets of torque values, associating a tightening class with each acquired time-domain and frequency-domain representation identifying a tightening operation, training a machine-learning model with the acquired time-domain representations and frequency-domain representations and the tightening class and supplying the trained machine-learning model with a further acquired time-domain representation frequency-domain representation for a fastener having been tightened by the tightening tool, wherein the trained machine-learning model outputs an estimated tightening class for the supplied set of observed torque and angle values.

Abstract: A method of controlling an electric motor of a tightening tool during a tightening operation, the method comprising: a) controlling the electric motor to run at a first motor speed using a first motor speed setpoint value, b) obtaining a torque or motor current value of the electric motor, c) determining a second motor speed setpoint value lower than or equal to the first motor speed setpoint value, based on an efficiency of the tightening tool at the torque or motor current value and the first motor speed setpoint value, d) setting the second motor speed setpoint value as the first motor speed setpoint value, e) controlling the electric motor to run at a second motor speed using the first motor speed setpoint value after step d), and repeating steps b)-e) until a predetermined motor speed or torque has been reached.

Abstract: A method for determining a tightening class of a tightening operation performed by a tightening tool is provided. The method comprises acquiring time-domain representations of sets of observed torque and angle values for fasteners having been tightened by the tightening tool, acquiring frequency-domain representations of the observed sets of torque values, associating a tightening class with each acquired time-domain and frequency-domain representation identifying a tightening operation, training a machine-learning model with the acquired time-domain representations and frequency-domain representations and the tightening class and supplying the trained machine-learning model with a further acquired time-domain representation frequency-domain representation for a fastener having been tightened by the tightening tool, wherein the trained machine-learning model outputs an estimated tightening class for the supplied set of observed torque and angle values.

Abstract: The present invention is a method of producing highly crystalline silver microparticles by a reduction reaction, which comprises precipitating the silver microparticles by reacting a silver solution containing at least silver ions and a reducing agent solution containing at least a reducing agent by a continuous wet reduction method, wherein a reduction rate from the silver solution to the silver microparticles is 99% or more; an average primary particle diameter of the silver microparticles is 100 nm or more and 1,000 nm or less; and an average crystallite diameter relative to the average primary particle diameter of the silver microparticles is 80% or more. Even highly crystalline silver microparticles having 95% or more of the ratio (d/D) of the average crystallite diameter (d) relative to the average primary particle diameter (D), that is, silver microparticles in which almost all silver microparticles are single crystals, can be continuously produced by a liquid phase method, by the present invention.

Abstract: An aircraft includes a fuselage, a wing structure and a tail assembly, and also at least one propeller having the general shape of a ring. The propeller includes a rotor formed by an annular element having blades projecting outwardly therefrom, and a likewise annular base coaxial to the annular element and on which the annular element can turn under the action of a driver. The base is coaxial to the fuselage and integrated into the shell constituting the fuselage. The blades of the rotor are arranged outside the shell.

Abstract: Provided is a machine tool including: a movable drum base (4); a drum (5) that is incorporated in the drum base (4) and is circular in outline; and a quill main spindle (6) penetrating through the drum (5) in a central axis direction of the drum (5), wherein protrusion allowance from the drum (5) is adjustable, wherein a bearing provided along an outer circumference of the drum (5) is interposed between the drum base (4) and the drum (5) such that the drum (5) is rotatable in the drum base (4), and movement of the drum base (4), rotation of the drum (5), and protrusion allowance adjustment of the quill main spindle (6) from the drum (5) allow a tool (10) mounted on the quill main spindle (6) to be positioned.

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 fluid treatment device with a new configuration is provided. The fluid treatment device is provided with an upstream treatment unit defined by treatment surfaces that rotate relative to each other, and a downstream treatment unit arranged downstream of the upstream treatment unit. The upstream treatment unit is configured such that, by passing the fluid to be treated into an upstream treatment space defined by the treatment surfaces, the fluid to be treated is subjected to upstream treatment. The downstream treatment unit is provided with a downstream treatment space which performs the function of retaining and mixing the fluid to be treated by means of a labyrinth seal. An upstream outlet of the fluid to be treated from the upstream treatment unit opens into the downstream treatment space, and the downstream treatment space is configured to use the labyrinth seal to perform the function of controlling retention time.

Abstract: The present disclosure relates to a method of a device of enabling determination of a tightening class of a tightening operation performed by a tightening tool. The determination is based on normalizing torque values of an end-tightening phase with a determined torque value range of the end-tightening phase and angle values of the end-tightening phase with a determined angle value range of the end-tightening phase, and training a machine-learning model with the normalized torque and angle values of the end-tightening phase and at least one tightening class associated with the normalized torque and angle values of the end-tightening phase, the tightening class identifying a type of tightening operation having been applied to the fastener.

Abstract: The present disclosure relates to a method of a device for determining correctness of tightening classes estimated by a trained multi-label ML model of a tightening operation performed by a tightening tool. The determination is based on evaluating if there is an indication that an acquired at least one tightening class is incorrect in terms of the characteristics of the tightening having been applied to the fastener, and if so, providing an alert indicating that the estimation of the at least one tightening class by the ML model is incorrect.