Abstract: Reflective level indicator comprising a central support piece (10) extending in the vertical direction (Z-Z), a glass element (30) extending in the vertical direction (Z-Z), a pair of flanges (40) situated opposite each other for closing the indicator, seals (20;120) arranged between the glass element (30) and the support piece (10) and the closing flanges (40), wherein said flanges (40) have a C-shaped central body (41) with short arms (42) extending in the longitudinal direction (X-X) along a section with a length such as to project above, in the same direction (Y-Y), by an amount smaller than the width of the glass element (30) in the longitudinal direction, and a foot (43) which extends from one of the two arms (42) of the central body (41) in the transverse direction (Y-Y) and the free end of which has a flange (43a) bent inwards and provided with holes (43b).

Abstract: A microelectromechanical system device including anchors and mass is provided. Electrical interconnections are formed on the mass by using a insulation layer of mass, an electrical insulation trench and conductive through hole. The electrical interconnections replace the cross-line structure without adding additional processing steps, thereby reducing the use of the conductive layer and the electrical insulation layer. A method for fabricating the microelectromechanical system device is also provided.

Abstract: Disclosed herein are an inertial sensor and a method of manufacturing the same. The inertial sensor 100 according to a preferred embodiment of the present invention includes a membrane 110, a piezoelectric body 120 formed in a multilayer above the membrane 110, a first electrode 130 formed between the membrane 110 and the piezoelectric body 120, a second electrode 140 formed on an exposed surface of the piezoelectric body 120, and a third electrode 150 formed between layers of the piezoelectric body 120 formed in a multilayer.

Abstract: Disclosed herein is an inertial sensor. The inertial sensor 100 according to preferred embodiments of the present invention includes: a membrane 110; a mass body 120 disposed under the membrane 110; a piezoelectric body 130 formed on the membrane 110 to drive the mass body 120; and trenches 140 formed by being collapsed in a thickness direction of the piezoelectric body 130 so as to vertically meet a direction in which the mass body 120 is driven. By this configuration, the trenches are formed by being collapsed in a thickness direction of the piezoelectric body 130 to provide directivity while retaining the rigidity of the piezoelectric body 130 to prevent a wave from being propagated in an unnecessary direction, thereby driving the inertial sensor 100 in a desired specific direction.

Abstract: A micro-electro-mechanical-system (MEMS) device comprising two proof masses disposed in the first frame, such that the MEMS device with oscillating assemblies senses the angular velocity in the two axes, respectively. The MEMS device with oscillating assemblies further comprises a lever structure and two oscillating assemblies connecting at two opposite ends of the lever structure, such that the oscillating assemblies move in opposite directions synchronously. The MEMS device with oscillating assemblies further comprises a spring assembly connected between the proof mass and a movable electrode, restricting the proof mass to drive the movable electrode to only move in a specific direction.

Abstract: The present invention relates to a method for operating a rotation sensor for detecting a plurality of rates of rotation about orthogonal axes (x,y,z). The rotation sensor comprises a substrate, driving masses, X-Y sensor masses, and Z sensor masses. The driving masses are driven by drive elements to oscillate in the X-direction. The X-Y sensor masses are coupled to the driving masses, and driven to oscillate in the X-Y direction radially to a center. When a rate of rotation of the substrate occurs about the X-axis or the Y-axis, the X-Y sensor masses are jointly deflected about the Y-axis or X-axis. When a rate of rotation of the substrate occurs about the Z-axis, the X-Y sensor masses are rotated about the Z-axis, and the Z sensor masses are deflected substantially in the X-direction.

Abstract: A microelectromechanical system for detecting accelerations about or along an X-axis, Y-axis, and/or Z-axis, having a substrate and having a driving mass and a detection mass (1) disposed parallel to the substrate in an X-Y plane and mounted displaceably relative to the substrate. At least one slit (5) is disposed in the driving and/or detection mass (1) for compensating for distortions due to residual material stresses in the driving and/or detection mass (1).

Abstract: Disclosed herein are a gyro sensor driving circuit and a method for driving a gyro sensor. The gyro sensor driving circuit includes: a driving unit applying a driving signal to a gyro sensor according to a control; a stabilization detection unit determining whether or not driving of the gyro sensor is stabilized and generating a driving stabilization signal; and a timing controller controlling termination of an active section of the driving unit upon receiving the driving stabilization signal from the stabilization detection unit.

Abstract: An inertial sensor includes driving piezoelectric transducers for enabling an oscillation of a resonator, sensing piezoelectric transducers for enabling a detection of a movement of the inertial sensor, and piezoelectric compensating elements substantially equidistantly among the driving and the sensing piezoelectric transducers, wherein the compensating elements and the resonator form corresponding capacitors having capacitive gaps, and wherein, during the oscillation of the resonator, changes in electrostatic charges stored in the capacitors are measured with the compensating elements and are modified so as to modify the oscillation of the resonator.

Abstract: Disclosed is an inertial sensor, including a membrane, a mass body provided underneath a central portion of the membrane, a post provided underneath a peripheral portion of the membrane, and a cap having a peripheral portion bonded to a lower surface of the post using low-temperature silicon direct bonding. A method of manufacturing the inertial sensor is also provided.

Abstract: The present invention relates to a MEMS acceleration sensor comprising a substrate and a sensor mass that is disposed parallel to the substrate in an X-Y plane. The sensor mass is rotatable about a rotary axis, and includes a plurality of holes. The weight of the sensor mass is different on the two sides of the rotary axis. The sensor further includes sensor elements for detecting a rotary motion of the sensor mass about the rotary axis. To change the weight of the sensor mass on one side of the rotary axis relative to the other side, material of the sensor mass is partially removed in some of the holes for reducing the weight of the sensor mass, and/or material of the sensor mass is added in the Z-direction, in particular in the extension of the holes, for increasing the weight of the sensor mass.

Abstract: An inertial sensor includes driving piezoelectric transducers for enabling an oscillation of a resonator, sensing piezoelectric transducers for enabling a detection of a movement of the inertial sensor, and piezoelectric compensating elements substantially equidistantly among the driving and the sensing piezoelectric transducers, wherein the compensating elements and the resonator form corresponding capacitors having capacitive gaps, and wherein, during the oscillation of the resonator, changes in electrostatic charges stored in the capacitors are measured with the compensating elements and are modified so as to modify the oscillation of the resonator.

Abstract: A method determines a resonance frequency of a resonant device. The method includes stimulating the resonant device with a periodic input signal having a frequency in a frequency interval; determining a frequency value for said periodic input signal in said frequency interval for which a phase-difference between said periodic input signal and a corresponding periodic output signal of the resonant device is minimum; generating a flag indicating that a resonance frequency has been determined; and generating signals representing said resonance frequency as a value of the frequency of said periodic input signal.

Abstract: A device for inspecting a moving metal strip includes a first electromagnetic acoustic transducer having an ultrasonic wave emitter. The waves emitted from the emitter are emitted to be incident on a first edge of a surface of the strip, and the emitter is not in contact with the strip. A second electromagnetic acoustic transducer is provided and includes an ultrasonic wave receiver. The waves received emerging from an area of the strip surface toward the receiver, the receiver is not in contact with the strip. A processing unit is coupled to the second electromagnetic acoustic transducer to provide an inspection criterion using a signature of the ultrasonic waves measured. The area is located on the strip such that a wave path between the first edge of the strip and the area is aligned in a linear direction mainly transverse to the direction of movement of the strip.

Abstract: A technique is provided for determining an orientation of a defect present within a mechanical component using at least one ultrasonic head that applies ultrasonic signals to the mechanical component starting from various measurement points. Echo ultrasonic signals reflected by a point to be analyzed present within the component back to the measurement points are received by the same or a different ultrasonic head. A data processing unit analyzes the received echo ultrasonic signals as a function of a sound emission direction between each measurement ping and the point to be analyzed for determining the orientation of the defect. A distance between the measurement point and the point to be analyzed is calculated for every measurement point as a function of a signal propagation time between the point in time of emitting the ultrasonic signal and the point in time of receiving the echo ultrasonic signal reflected by a defect.

Abstract: The present invention is related generally to the field of non-destructive materials testing using ultrasonic devices, more particularly, ultrasonic devices in a phased array and includes a wedge for conducting pitch-catch ultrasonic phase array testing of materials wherein the wedge includes a liquid column and is manufactured with specific angles so as to control the angle at which the ultrasonic waves pass into the wedge and then are refracted when passing from the liquid in the liquid column into the material being analyzed, thus providing a wider range of analysis via sweeping the beams from the wedge than was possible with known wedges.

Abstract: A method for acoustically measuring an external surface of a component and a wall thickness or component thickness at that location is provided. The method also provides for measuring the external surface by physical contact while concurrently acoustically measuring a wall thickness at that location.

Abstract: An object information acquiring apparatus has: a holding unit which holds an object; a probe which receives an acoustic wave generated in the object via the holding unit and converts the acoustic wave to an electrical signal; a force measuring unit which measures a force applied to the object when the object is held by the holding unit; a sound speed acquiring unit which determines a sound speed in the object by using the force measured by the measuring unit and a contact area between the object and the holding unit; and a generating unit which generates object information data from the information about the sound speed determined by the sound speed acquiring unit and the electrical signal.

Abstract: An approach for detecting rotor anomalies is disclosed. An on-site monitoring unit monitors vibration measurements obtained from a rotor during a transient speed operation. In one aspect, the on-site monitoring unit classifies the vibration measurements into predetermined ranges of rotor speed during the transient speed operation, determines maximum vibration data for each of the predetermined ranges of rotor speed during the transient speed operation and compiles the maximum vibration data into a snapshot of the vibration measurements obtained during the transient speed operation. A remote monitoring unit detects a rotor anomaly from the snapshot of vibration measurements generated by the on-site monitoring unit.

Abstract: A piezoresistive sensor chip element of a pressure sensor has lower face with an outer edge, an adhesion area and a non-adhesion area. The chip has a closed chip cavity for measuring the pressure of a medium flowing around the chip. The upper face of a substrate is fastened only at the adhesion area of the chip. The non-adhesion area extends at least over a circular area arranged centrally on the lower face and covers a third of the lower face's total area and extends over at least one connection area from the circular area to the edge of the lower face. The pressure in the pressure medium can spread through the connection area into a space under the non-adhesion area on the element lower face. The substrate has a recess located centrally under the sensor chip element.

Abstract: An electrical property measuring apparatus for pressure sensor includes a first plate, a second plate, an object to be measured, an electrical property measuring unit used for measuring the electrical properties of the object, and a fluid supplying system. The second plate is opened or closed relative to the first plate. The object is disposed between the first plate and the second plate. The fluid supplying system connects to a space formed by the first plate and a pressed surface or a space formed by the second plate and a pressed surface. The fluid supplying system provides a fluid to the space such that the fluid presses on the object and the electrical property measuring unit measures the electrical properties of the object. A method of measuring electrical property for pressure sensor is also provided.

Abstract: An integrated circuit includes a pulse generator to provide an excitation pulse to an output terminal and a comparator to receive a signal in response to the excitation pulse and for comparing the signal to a threshold to produce a comparator output signal corresponding to oscillations in the signal. The integrated circuit further includes a counter to count pulses in the comparator output signal and a discriminator circuit to compare a count value of the counter to a damping threshold and for providing an output signal having a first value when the count value is equal to or exceeds the damping threshold and otherwise having a second value.

Abstract: The invention relates to a method and a device for monitoring and/or optimizing flow processes, in particular injection molding processes. Vibrations caused by a flow of a material are detected and analyzed, wherein a vibration spectrum is detected at different times or in a (virtually) continuous manner and subjected to a multidimensional analysis.

Abstract: An ultrasonic transducer for an ultrasonic flow measuring device, comprising a first housing part and a second housing part. The second housing part is axially guided in the first housing part and is so biased relative to the first housing part that, in a first state of the ultrasonic transducer, a first axial stop of the second housing part rests on a first axial stop of the first housing part, wherein, by applying, counter to the bias, a predetermined force on a second axial stop of the second housing part, the second housing part is axially shiftable, so that, in a second state of the ultrasonic transducer, the first axial stop of the second housing part is moved out of the first state.

Abstract: Ultrasonic flow rate measurement device includes measurement flow path in which a fluid to be measured flows, and a pair of ultrasonic vibrators that are disposed in directions such that a propagation path of an ultrasonic wave forms a V-shape relative to measurement flow path. Moreover, the device includes measurement circuit which measures a flow rate of the fluid to be measured by measuring a propagation time of the ultrasonic wave between the pair of ultrasonic vibrators, and inlet-side rectification part which is disposed, in the inlet side of measurement flow path, to stabilize the flow of the fluid to be measured. Furthermore, the device includes outlet-side coupling part which is disposed in the outlet side of measurement flow path, and signal lead-out part which outputs a flow rate value measured with measurement circuit.

Abstract: A flow-rate measurement device includes a first transducer and a second transducer which are provided in a fluid flow path to transmit and receive an ultrasonic signal, a timer unit which measures a propagation time of the ultrasonic signal propagating between the first transducer and the second transducer, and a flow-rate calculation unit which executes a unit measurement step a predetermined number of times and calculates a flow rate of a fluid flowing in the fluid flow path on the basis of the propagation times measured the predetermined number of times, the unit measurement step being an operation in which a direction of transmission to reception between the first transducer and the second transducer is switched and the timer unit measures the propagation times of the ultrasonic signal in both directions.

Abstract: A fan testing apparatus includes an air duct defining an air inlet and air outlet, and at least one anemometer mounted at the air outlet. The fan is received in the air duct to generate airflow in the air duct via the inlet and out of the air duct via the outlet, and the at least one anemometer is used to measure wind speed at the outlet.

Abstract: A tension measurement assembly, for measuring and monitoring a tension force in a cable being deployed from a spooling device on which the cable is spooled, comprises at least one force sensor disposed adjacent the spooling device for sensing a force applied to the spooling device and generating a force signal representing the sensed force, and a processor responsive to the force signal for calculating and monitoring a tension force present in the cable. A cable sensor engages the deployed cable for sensing a spooling/unspooling rate and a length of the cable moving past the cable sensor in a pre-determined time period and generating a spooling signal representing the sensed rate and length to the processor for use in the calculating and monitoring of the tension force.

Abstract: A drive torque estimation device secures accuracy of a drive torque of a compressor by accurately grasping a flow rate of refrigerant in a cycle. The pressure difference is detected by a condenser as a resistor for calculating the flow rate. The pressure difference between two portions based on physical quantities relating to refrigerant pressures is detected using first and second sensors arranged at two portions in the cycle. A flow rate is calculated based on the detected pressure difference. The first sensor may be an upstream-side pressure sensor arranged at an inlet of the condenser or at a high-pressure side pipe upstream of the inlet and detects a pressure of the refrigerant flowing therethrough, and the second sensor may be a downstream-side pressure sensor arranged at a gas/liquid mixed phase region of the condenser and detects a pressure of the refrigerant flowing therethrough or may be a temperature sensor.

Abstract: A sensor arrangement including a torque sensor for sensing the torque acting on a shaft. The torque sensor shaft includes two shaft segments, wherein a magnetic encoder is disposed on the first shaft segment and a stator packet is disposed on the second shaft segment, the stator packet having at least two magnetically conductive stator elements conducting the magnetic field generated by the magnetic encoder of the first shaft segment and guiding the field directly or indirectly to one or more magnetic field sensor elements for sensing the torque. An angle of rotation index unit detects and/or identifies the angular position of the shaft with respect to a defined angle of rotation and/or a defined range of angle of rotation. The angle of rotation index unit includes an index magnet attached to a carrier. The carrier connected to the magnetic encoder or at least to one of the stator elements.

Abstract: A small, high-stiffness torque sensor. An annular deformable body is disposed between left and right side supports. Convex sections protruding from the left side support in a rightward direction are joined to the left side surface of the annular deformable body, and convex sections protruding from the right side support in a leftward direction are joined to the right side surface of the annular deformable body. When force is applied to the right side support and torque around the Z axis acts on the left side support, the annular deformable body is elliptically deformed and the long-axis position of the inner peripheral surface of the annular deformable body moves away from the Z axis while the short-axis position moves closer to the Z axis. The acting torque is detected as a variation in the capacitance value of capacitive elements formed by displacement electrodes and fixed electrodes.

Abstract: This disclosure is directed to techniques for detecting one or more indications of rotational movement of a rotatable member. According to one example, at least one movement sensor is associated with the rotatable member and is configured to detect at least one measurement of rotational motion of the rotatable member. The at least one movement sensor is configured to be powered via at least one photoelectric element secured to the rotatable member. The at least one movement sensor is configured to communicate the at least one indication of the detected at least one measurement from the rotatable member via at least one wireless communications module associated with the rotatable member and powered via the at least one photoelectric element.

Abstract: Hybrid force sensitive input devices are formed as a membrane assembly that is capable of detecting capacitive presence near the sensor surface as well as pressure inputs and varying applications of pressure to the sensor surface. As a capacitive sensor, the electrical charge of a user's hand, finger or other extremity is sensed by the conductive layers of the sensor as a function of the input extremity's location and proximity to the sensor surface. As a force sensor, a user's input contact with the sensor surface is detectable when conductive elements on apposing substrates are forced into contact when input force is applied. Increasing the applied force increases the number of conductive particles making contact allowing the electrons to travel from one conductive trace on a first substrate through the contacting conductive patches to a perpendicular conductive trace on a second substrate.

Abstract: A pedal operation amount detecting device that is provided in an operating pedal apparatus including a transmitting member having a pedal arm of an operating pedal that is arranged so as to be pivotable about a support axis and that is depressed, and an output member to which a depression force is transmitted from the transmitting member and to which a reaction force corresponding to the depression force is applied, the pedal operation amount detecting device including a sensor member that is arranged on a load transmission path at a position offset from the transmitting member in a direction parallel to the support axis and that is deformed by the depression force and the reaction force, and the pedal operation amount detecting device electrically detecting a deformation of the sensor member.

Abstract: Test pieces necessary to conduct a failure analysis of defects discovered with a defect review apparatus are produced with high quality, with excellent reproducibility, in a short period of time, and at low costs. An impression marking apparatus which can be driven in a direction perpendicular to a surface of a semiconductor wafer and is equipped with an impression needle fixed on the leading end of the mechanism is attached to a wafer defect review apparatus. A position to which impression marking is applied is determined on the basis of coordinate information on a defect previously acquired with the wafer defect review apparatus. In addition, the feed rate of the impression marking mechanism in the vertical direction thereof is determined on the basis of height information acquired with a height detection sensor for detecting the height of a wafer surface provided in the wafer defect review apparatus.

Abstract: A fluid flow sampling device comprises an elongate housing and a sleeve disposed in the housing having openings corresponding to an inlet and an outlet of the housing. The sleeve is movable relative to the housing to an open position and a closed position. The open position aligns the openings of the sleeve with the inlet and the outlet to allow fluid to flow into the inlet, through the sleeve, and out of the outlet. The closed position blocks the inlet and/or the outlet with a portion of the sleeve such that fluid is prevented from flowing through the sleeve. Additionally, a coalescent filter is disposed in the sleeve between the inlet and the outlet to allow some fluid to pass through the filter for sampling and to allow another portion of fluid to flow past the filter and out of the outlet to carry away coalescent material on the filter.

Abstract: Sampling devices are used to obtain samples of fluids to be analyzed and to determine the composition of the fluid in the sampled environment. A sampling apparatus with an inflatable sample bag used to collect and store liquid, air, vapor, and or gas samples by drawing the sample into the bag through an inlet, a sorbent tube, cassette, and/or other collection media is described. The means for extracting the sample and moving it into the sample bag comprises means for expanding the volume of a sample bag and creating a vacuum or reduced pressure within the sample bag. The means for expanding the include separating walls of a sample bag by use of gravity, pneumatic pressure, a biasing force, hydraulic force, for example or increasing the volume of a sample bag retaining container by such forces. Such sampling apparatuses do not require use of a sampling pump.

Abstract: An apparatus and a method for sampling underwater radioactive solution. The apparatus includes a main unit, a connecting rod inserted into the main unit, a connecting ring connected to one side of the connecting rod, a container unit connected to the opposite side of the connecting ring, a solution access channel, an air motor for changing air pressure in the container unit to draw or extract the radioactive solution in or out of the container unit, a holder for fixing the air motor on the main unit, a synchronizing connector for connecting the connecting rod to the air motor, so as to synchronize the back-and-forth movement of the connecting rod with the air pressure of the air motor, a control unit for controlling the operation of the air motor, a flexible pipe connecting the air motor to the control unit, and a depth-setting unit.

Abstract: An acceleration detector includes: a plate-like flexible portion which has piezoelectricity and can flex by an inertial force (base portion, joint portion, moving portion); an acceleration detection element loaded on a main surface of the base portion and the moving portion; an electrically conductive mass portion loaded on the moving portion; and a package accommodating the base portion, the joint portion, the moving portion, the acceleration detection element and the mass portion. The acceleration detection element is provided with wirings through which detected acceleration is taken out as an electrical signal, and the mass portion can be maintained at a desired electric potential.

Abstract: A testing apparatus includes a testing platform, a tray attached to the testing platform and substantially perpendicular to the testing platform, a pressing member substantially parallel to the testing platform and slidably attached to the tray, and a resilient member located between the tray and the pressing member. The pressing member is slidable relative to the tray between a first position and a second position. When the pressing member is located on the first position, a first distance is defined between the pressing member and the testing platform, for receiving an electronic device between the pressing member and the testing platform. When the pressing member is located on the second position, the resilient member is deformed, and a second distance, that is greater than the first distance is defined between the pressing member and the testing platform, for disengaging the electronic device from the testing platform.

Abstract: A transmission mechanism includes a first rotating wheel, a second rotating wheel and an interference mechanism. The interference mechanism includes an engaging slot, a containing slot and an engaging member. The engaging slot is formed on the first rotating wheel, and the engaging slot includes an arc-shaped concave surface. The containing slot is formed on the second rotating wheel. The engaging member is located in the at least one containing slot, and the engaging member includes an arc-shaped convex surface. The first rotating and the second rotating wheel simultaneously rotate when the arc-shaped convex surface of the at least one engaging member engagingly contacts with the arc-shaped concave surface of the at least one containing slot. The first rotating wheel and the second rotating wheel do not simultaneously rotate when the at least one engaging member disengages from the at least one containing slot.

Abstract: A movement transformation mechanism which is used in presses characterized by comprising an outer crank spindle which is rotated by the first drive source; an outer crank spindle bearing which rotates together with the outer crank spindle and which has an inner crank spindle bearing formed on the lateral surface as eccentric from the center; and an inner crank spindle which is rotated by the second drive source and whereon the connecting rod is hinged, and characterized in that the inner crank spindle is bedded inside said inner crank spindle bearing in a fixed manner.

Abstract: A differential-velocity driving device and a mechanical arm to which the differential-velocity driving device is applied are provided. The differential-velocity driving device includes a first rotary driving element, a first transmission gear connected to the first rotary driving element, a second rotary driving element, a second transmission gear connected to the second rotary driving element, a fixing member connected to the first rotary driving element and the second rotary driving element such that the first rotary driving element does not move or rotate with respect to the second rotary driving element, a power output gear engaged with the first transmission gear and the second transmission gear, and an output shaft passing through an axle center of the power output gear and being coaxial with the axle center.

Abstract: Seat actuators and methods for operating seat actuators are disclosed. A seat actuator comprises an actuator interface, a motor, and a brake. The actuator interface is adapted to be coupled to a corresponding seat interface. The motor is operable to provide a force to the actuator interface. The brake comprises a plurality of interlocking components. The brake is operable to prevent movement of the actuator interface by a mechanical interlocking of the plurality of interlocking components. A method for operating the seat actuator comprises operating a motor of the seat actuator to provide a force to an actuator interface, and operating a brake to prevent movement of the actuator interface by mechanically interlocking a plurality of interlocking components of the brake.

Abstract: Provided is a sector gear including: a drive gear having a drive part that forms a part of a circle and has a plurality of teeth and a non-drive part that forms a remaining part of the circle and provides a non-contact angle of at least approximately 90 degrees; first and second movers forming a disconnector and a grounded breaking switch, respectively; and first and second driven gears engaged with the drive gear and respectively engaged with the first and second movers and configured to make the first mover or the second mover operate in conjunction with the drive part of the drive gear according to a direction of rotation of the drive gear, wherein an intermediate angle between the first and second movers is between approximately 90-135 degrees. The present invention can reduce the size of the gas-insulated switchgear having the sector gear.

Abstract: A dual clutch transmission designed as a reduction gearing which has concentric central and hollow transmission shafts, exactly one layshaft, and two power shift elements. A hollow shaft is provided coaxially on the layshaft, which can be rotatably fixed to the layshaft, via one shift device, and to which at least two gears of the gear stages are rotatably fixed. A further hollow shaft is provided coaxially on either the central or the hollow transmission shaft, which can be connected, via one of the shift devices, with the central or the hollow transmission shaft and to which at least two further gears of the gear stages are rotatably fixed. At least three transmission ratios are obtainable as a result of engaging the shift element into the power flow in three of the gear stages, by which one transmission ratio results from engaging only one shift element into the power flow.

Abstract: Aspects of the present invention relate to system and apparatus for shifting gears within a gearbox of a drill head, which can be attached to a drill rig for various drilling operations. In particular, the present disclosure relates to engaging various gears within the gearbox and maintaining the gears in the engaged position such that to prevent the gears from disengaging in response to movements and/or vibrations within the gearbox, the drill head, and/or the drill rig.

Abstract: A device, which connects a gearmotor to an aircraft wheel, comprising: a casing rotatably carrying a shaft driven by the gearmotor, the shaft having a fluted portion on which a gearwheel is mounted to slide along a longitudinal axis of the shaft without rotating relative to the shaft; a toothed ring for constraining to rotate with the aircraft wheel; and means for moving the gearwheel axially between a retracted position (disengaged from the toothed ring) and an engaged position (gearwheel meshes with the toothed ring). The means for moving comprises a hollow screw-and-nut assembly extending around the shaft, one of the elements being axially secured to the gearwheel but prevented from rotating by an anti-rotation member, and the other element of the screw-and-nut assembly being rotatably mounted inside the casing to be driven selectively by an electric motor so that rotating the electric motor causes the gearwheel to move axially.

Abstract: An actuating device is provided for the rotation of a turbine shaft train and includes a principal turning gear electrically operated and an auxiliary turning gear hydraulically operated. Also provided is a turbine-generator set for the generation of electricity including the actuating device.

Abstract: A gear motor assembly includes a casing having a through hole, a motor fixed to the casing, an output shaft, a gear fixed to the output shaft and driven by the motor, and a substantially tubular bearing fixed in the through hole of the casing. The gear has a shaft portion that is sleeved in the bearing. A slot is formed in the inner surface of the bearing and/or the outer surface of the shaft portion and is filled with lubricant.