Abstract: The invention deals with a rolling mill (1) for metallic products comprising at least one pair of work rolls and at least one cooling device (2) projecting a plurality of cooling jets under pressure on at least one work roll, the cooling device projecting also at least one scraper jet between the cooling jets and the metallic product to be rolled, the scraper jets being oriented in the desired flow direction following a re-entrant angle towards the perpendicular to the surface of the work roll, as well as with a rolling process using said rolling mill (1).

Abstract: A crankshaft production method includes: pressurizing both end portions of a shaft blank with a pressurization surface of a die, the pressurization surface being inclined in a specific direction so as to come close to the other end side of the shaft blank, and applying an axial compressive load to the shaft blank, while restricting a radial deformation in a predetermined zone of the shaft blank in a direction other than the specific direction, thereby swaging the shaft blank and causing the predetermined zone to buckle in the specific direction.

Abstract: A method is disclosed for marking a socket. The method includes the steps of providing a socket, pressing the socket to make an indented mark, executing thermal treatment on the socket, coloring a portion of the socket near the indented mark to form a printed layer, vibrating and grinding the socket to remove the printed layer from the socket except the indented mark, and electroplating the socket to form a coating on an external side and an internal side of the socket.

Abstract: An assembly for actuating a pipe expander, the assembly comprising a first actuator, arranged to engage a pipe expander head and actuate the same a second actuator, spaced apart from the first actuator and operatively engaged therewith such that operation of the second actuator effects operation of the first actuator to actuate the pipe expander head.

Abstract: A coaxial terminal connecting tool includes a second handle portion, a first handle portion, and a transmitting portion. The second handle portion has a receiving slot including a guiding assembly and a terminal receiver. The terminal receiver fixing the terminal element is formed at an end of the receiving slot. The first handle portion is pivoted to an end of the second handle portion. An end of the transmitting portion is pivoted to a first predetermined position formed on the guiding assembly and another end thereof is pivoted to a second predetermined position formed on the first handle portion. A length of the transmitting portion is adjustable. An end of the adjusting unit is arranged to a first predetermined position of the guiding assembly, while another end thereof is pivoted to the transmitting portion. The adjusting unit consists of a first sliding portion, adjusting portion, and a second sliding portion.

Abstract: Example composite materials and calibration assemblies using the same. An example calibration assembly for use in calibrating a downhole formation evaluation tool includes a first body comprising a first material and having a first geometry, a second body comprising a second material formed to receive the first body, wherein the first and second materials and the first geometry are selected so that a calibration property of the calibration assembly substantially matches a corresponding calibration property of a third material.

Abstract: A capacitive sensor in its simplest form has three identical plated spatial electrodes, which are positioned equally spaced apart, in order, alignment and parallel with each other. The first and third electrodes are the outer electrodes and connected in parallel by a first lead wire serving as a first electrical pole to be a group of the integrated electrodes. The second electrode is the middle electrode and connected by a second lead wire serving as a second electrical pole. The sensor is applied by an alternating current (AC) excitation by an AC device. The present invention method includes application of referencing and sensing capacitive sensors to obtain a measured temperature compensated electrical property of the oil to thereby obtain a measured remaining usage so as to a predicted one for the oil.

Abstract: The invention relates to a rotary transducer (1) and to a method for monitoring wear on the latter. The rotary transducer has a detector device (11) having at least one measurement sensor (12). During operation, the measurement sensor can be used to generate a measurement signal (13) which is representative of the angular position and/or velocity of an object which can be connected to the rotary transducer. The detector device (11) has at least one rotary bearing (15) and at least one material measure (16) which can be rotated, by means of the rotary bearing, relative to the measurement sensor and is arranged in the measurement field (17) of the latter. A monitoring device (20) which is connected to the measurement sensor such that data are transmitted and can be used, during operation, to output a state signal (23), which is representative of the state of wear of the rotary transducer, on the basis of the measurement signal is also integrated in the rotary transducer (1).

Abstract: A sensor control circuit unit (1) includes a circuit board (70) which has opposite sides (70a) and (70b) facing in parallel with each other, and carries a signal detection circuit (28) for receiving a detection signal whose level is equal to or less than one ?A and which changes in accordance with NOX concentration, a power supply circuit (35), and a heater circuit (40) for controlling a heater. The power supply circuit (35) and the heater circuit (40) are mounted on one side of the circuit board (70) toward one side (70a) of the opposite sides, and the signal detection circuit (28) is mounted in a mounting area on the other side of the circuit board (70) toward the other side (70b) of the opposite sides, the mounting area being different from a mounting area of the circuits (35) and (40).

Abstract: A reservoir (4) for the working fluid of the saturation unit (3) is connected with a sampling section (1) by a pressure equalization line (9) of the gas that is loaded with solid particles, as a result of which a sucking back of the working fluid from the reservoir (4) into the sampling section (1) and other sections of the measurement environment that are connected with such are prevented, even in the presence of unfavorable pressure conditions.

Abstract: There is provided a method for detecting at least one odor in a gas sample, the method comprising at least partially reducing an amount of water present in the gas sample; and detecting the presence or absence of at least one odor in the sample. There is also provided a method for reducing losses of sensitivity of at least one gas sensor adapted to detect and/or measure at least one odor in a gas sample, the method comprising at least partially reducing an amount of water present in the gas sample before contacting the sample with the at least one sensor. Apparatuses for detecting and/or measuring odors in a gas sample are also provided.

Abstract: A sensor element for determining a gas component or particles in a measuring gas, having a first and a second measuring electrode, the measuring electrodes being developed as interdigital electrodes having a row of intermeshing branches as well as a main conductor each, to which the branches are connected in an electrically conducting manner; and the branches of the interdigital electrodes being aligned essentially in parallel to a longitudinal axis of the sensor element.

Abstract: The invention relates to a method for diagnosing a particle filter used for filtering particles out of the exhaust gas of an internal combustion engine, wherein a collecting particle sensor is disposed downstream of the particle filter in the direction of flow of the exhaust gas and wherein a measurement for the loading of the particle sensor is determined from an output signal of the particle sensor.

Abstract: An apparatus is disclosed for testing the performance of a sealant for solid oxide fuel cell packs. The apparatus includes an oven including a base, a platform provided on the base and a frame connected to the platform. An elevator is used to raise and lower the oven. A pressuring and testing chamber is provided on the platform. The pressuring and testing chamber includes a first body and a second body connected to the first body. A carrier is provided between the first and second bodies. The carrier includes a first plate and a second plate so that the sealant can be provided between the first and second plates. A pusher includes an end connected to the frame and another end for pushing the second plate. A pusher-driving unit is connected to the frame for raising and lowering the pusher.

Abstract: To provide an engine oil degradation-estimating device and a device for estimating antioxidant performance of engine oil which are capable of determining degradation and an antioxidant performance of engine oil inexpensively and accurately, thereby making it possible to properly determine degradation of the engine oil and the time for replacement of the engine oil. The engine oil degradation-estimating device includes an ECU 2. The ECU 2 estimates an antioxidant performance OIT and a cleanliness preservation performance TBN of engine oil, and determines degradation of engine oil based on the estimated antioxidant performance OIT and cleanliness preservation performance TBN. The device for estimating antioxidant performance of engine oil also includes an ECU 2. The ECU 2 acquires concentration [FUEL] of fuel in engine oil, and estimates the antioxidant performance of the engine oil based on the acquired fuel concentration [FUEL].

Abstract: Method for safely inspecting an atmospheric storage tank, located above ground or on a floating vessel, without having to empty the tank. The method employs an explosion proof robot whose explosion proof character is assured by explosion proof design and monitoring the pressure within and outside the robot throughout the inspection. Operation of the robot will cease if the pressure within the robot falls below the pressure external the robot.

Abstract: A method for analyzing liquid samples may comprise applying a liquid to a cMUT device having a plurality of sensors, drying the plurality of sensors, electronically detecting an agent bound to each of the plurality of sensors, wherein the electrical circuit provides a sensor output responsive to a mechanical resonance frequency of the sensor, wherein the mechanical resonance frequency of the sensor is responsive to the binding of an agent to the functionalized membrane, and determining the mass of the agent bound to each of the plurality of sensors.

Abstract: A method may detect a flashback condition in a fuel nozzle of a combustor. The method may include obtaining a current acoustic pressure signal from the combustor, analyzing the current acoustic pressure signal to determine current operating frequency information for the combustor, and indicating that the flashback condition exists based at least in part on the current operating frequency information.

Abstract: A device for determining at least one parameter of a fluid medium, in particular an intake air mass of an internal combustion engine. The device comprises a sensor chip for measuring the parameter and a control and evaluation electronics having a circuit carrier. The sensor chip is situated on a chip carrier capable of being introduced into the fluid medium.

Abstract: According to the present invention there is provided a wheel diagnosis system (DS) for diagnosing a wheel (12) under test mounted to a vehicle and including at least a rim (18) and a tire (13). The wheel diagnosis system comprises a plurality of sensing units (1, 2, 3) being adapted for scanning predetermined surfaces of the wheel under test when the wheel under test is rotated, a supporting unit (5) to which the plurality of sensing units is mounted. Specifically, the supporting unit is freely movable relative to the wheel under test, and the sensing units are located at different positions on the supporting unit for scanning different portions of the predetermined surfaces of the wheel under test and collecting data of the operation result when the supporting unit is placed at the wheel under test at a predetermined scanning position. The present invention further refers to a method of diagnosing the condition of the wheel under test mounted to a vehicle.

Abstract: A vehicle includes an ABS, which controls braking force on wheels, and a tire condition monitoring apparatus, which detects the internal air pressure of tires. The dynamic rolling radius of the tires is computed based on signals from rotation sensor units of the ABS. The weight of a load carried by the vehicle is computed based on the dynamic rolling radius of the tires and the internal air pressure of the tires detected by the tire condition monitoring apparatus. When computing the load weight, a load weight determination map, which previously sets the relationship among the internal air pressure of the tires, the dynamic rolling radius of the tires, and the weight of the load carried by the vehicle, is used.

Abstract: An inflation and pressure measurement system having over pressure protection for an attached pressure gauge. A plunger is placed within an internal cavity of a valve body where the plunger can move axially into a first and a second position. In the first position there is gaseous communication between an inflation valve and an operating port. While in the first position, a gauge port may release gas through a wiper seal. In the second position there is gaseous communication between the operating port and the gauge port. The plunger may be biased in the second position. The first and second positions may be located by a locating groove in the plunger and a locating structure passing through the valve body and contacting the locating groove. While the inflatable device can be inflated using high pressures, the pressure gauge is protected from over pressure damage. Some embodiments can inflate and monitor the pressure of multiple inflatable devices from a single position.

Abstract: A type of liquid level gauge for continuous measurement of boiler steam drum under full conditions and its method for calculation of liquid level, this liquid level gauge includes one metal measurement tube and one transmitter. The steam-side pipe connected to steam drum is fitted on the upper part of the metal measurement tube and the water-side pipe connected to steam drum is fitted on the lower part of the metal measurement tube, one insulated jacket pipe is available inside the metal measurement tube and 1# probe, 2# probe, and 3# probe are mounted from down upwards inside the insulated jacket pope. The respective probes are mutually insulated and not conducted. The three probes are respectively connected with the transmitter through lead wires of the probes.

Abstract: Systems for and methods of detecting gravitational acceleration and gravity gradients are disclosed. The systems and methods include gravity gradiometers whose axes are substantially horizontal. In comparison with prior art systems, the systems presently disclosed provide one or both of more accurate measurements for the same amount of space, and smaller space requirements with the same or better accuracy.

Abstract: An increased flux density D'Arsonval Micro-Electro-Mechanical Systems (MEMS) device increases flux density. The increased flux density D'Arsonval Micro-Electro-Mechanical Systems (MEMS) device includes a housing, a proof mass suspended within the housing by at least one torsional flexure, a second torsional rebalancing magnet, and a current coil disposed on the proof mass. A portion of the current coil is disposed between the first torsional rebalancing magnet and the second torsional rebalancing magnet. A field generated in response to a current in the current coil interacts with a magnetic field generated by the first torsional rebalancing magnet and the second torsional rebalancing magnet. The magnetic field generates a rebalancing force that stabilizes a position of the proof mass.

Abstract: In various embodiments, an accelerometer apparatus includes a center member; a resilient member, enclosing the center member; and, a mass member in contact with the resilient member, enclosing the center member; wherein, ambient motion of the apparatus at or beyond a selected threshold causes the resilient member or the mass member to contact the center member, thereby indicating the selected threshold has been met or exceeded. In one embodiment, the resilient member or the mass member contacting the center member closes an electrical circuit, whereby the accelerometer functions as an electrical switch.

Abstract: An apparatus testing axle shafts including i) at least one ultrasonic probe to analyze, in a selected angular sector, selected portions of a wall exhibiting known variable internal and external radius profiles of a tubular axle shaft and thus acquire analysis data, ii) a controller to determine, as a function of the profiles and possible loading and environment of the shaft, at least one first and at least one second selected site on the external or internal surface of the wall where each probe is to be placed manually, to analyze at least one first and at least one second selected portion of the wall respectively in at least one first and at least one second selected angular sector oriented in first and second opposing longitudinal or transverse directions, and thus acquiring analysis data for various relative angular positions of the shaft in relation to the probe, and iii) a processor to create from these acquired analysis data maps representing the transverse or longitudinal orientations and the positions

Abstract: The invention is directed toward a new method for estimating and imaging the spatial and temporal mechanical behavior of materials in responses to a mechanical stimulus. This method is designed to work in inherently noisy applications, such as the imaging of the time-dependent mechanical behavior of biological tissues in vivo and using a preferred hand-held configuration of scanning.

Abstract: The transmission of a detection wave and the reception of a reflected wave are periodically repeated every transmission period. One received signal is compared with another received signal at a similar corresponding comparison periods in different transmission periods of a receiving time of the reflected wave. Switching between the comparison periods is performed each time the transmission period is updated. A waveform of a received signal in a block A0 corresponding to a reflected wave of an ultrasonic signal transmitted in a first transmission period is stored. The absolute values of differences between the waveform of a received signal in a block A1 corresponding to a reflected wave of an ultrasonic signal transmitted in a second transmission period and the stored waveform of the received signal in the block A0 are accumulated. The waveform of a received signal in a block B1 is stored.

Abstract: A pressure sensor is disclosed wherein pressure induced changes in birefringent properties of an optical sensing element are read out by transmission of at least one light beam. The pressure sensor can include at least one single-material transparent body which is subjected to at least two different pressures (p1, p2) in at least two different regions via at least two pressure chambers. The transparent body can transmit by a parallel or minimally divergent light beam without total reflection in the body such that the pressure-induced birefringence and a corresponding differential phase shift between linear polarisation components of the light beam depends on a difference of the different pressures (p1, p2).

Abstract: A semiconductor device includes a first sensor element in a first branch of a Wheatstone bridge and a second sensor element in a second branch of the Wheatstone bridge. The semiconductor device includes a first reference element in the first branch and a second reference element in the second branch. The semiconductor device includes a circuit configured to switch the first sensor element to the second branch and the second sensor element to the first branch.

Abstract: A pressure sensor for sensing a pressure of a fluid includes a monolithic metal including substrate having a substantially planar top side, wherein the metallic comprising substrate includes s a relatively thick boss near a center of the substrate and a thinned sensing portion that is elastically deformable and pressure-sensitive positioned radially outward from the boss. At least one dielectric layer is on the top side of the substrate. A plurality of piezoresistors are on the dielectric layer, wherein the piezoresistors are positioned over the thinned diaphragm portion. At least one overglaze layer is over the conductor layer that provides apertures for electrically contacting the plurality of piezoresistors. A sensing system includes a housing including at least a first port for coupling to a fluid for measurement of a pressure of the fluid and at least one sensor in the housing including a pressure sensor according to an embodiment of the invention.

Abstract: A bourdon tube pressure gauge includes a joint which is made of resin and attached to a pressure container, and a bourdon tube which is made of metal and provided with a base end part fixed to the joint. The joint is formed with a fixing hole to which the base end part of the bourdon tube is inserted and adhesively fixed, and a side face of the fixing hole is formed with a recessed part which is recessed in a flattened direction of the base end part of the bourdon tube that is inserted into the fixing hole. Further, the recessed part is formed toward a depth side of the fixing hole and at least a part of the recessed part which is formed on an inner side of the fixing hole is formed wider in the flattened direction than an opening part of the fixing hole which is an insertion port of the bourdon tube.

Abstract: An electric part protection member for a projecting contact terminal which projects from a supporting portion of an electric part, includes a bottomed cylindrical cap portion, adapted to be detachably placed over the supporting portion, wherein: the cap portion is formed of a conductive member; and when the cap portion is placed over the supporting portion, the cap portion is electrically connected to a housing of the electric part, and the contact terminals are spaced apart from the cap portion.

Abstract: The present invention is directed to a sensor-enabled geosynthetic material for use in geosynthetic structures, a method of making the sensor-enabled geosynthetic material, and a method of measuring geometric strains of a geosynthetic product made from the sensor-enabled geosynthetic material. The sensor-enabled geosynthetic material includes a polymeric material and an electrically conductive filler. The polymeric material and an electrically conductive filler are combined to provide a sensor-enabled geosynthetic material. The sensor-enabled geosynthetic material having a predetermined concentration of the electrically conductive filler so as to provide the sensor-enabled geosynthetic material with an electrical conductivity and a strain sensitivity within the percolation region or slightly above it.

Abstract: The invention relates to a compact magnetic inductive flowmeter device, comprising a measuring tube through which the medium for measuring flows, a housing within which the measuring tube is arranged, with an analysis device which analyses a flow measurement value for the medium recorded in the measuring tube and generates an analysed signal in a standardized form therefrom which contains information about the recorded measured values.

Abstract: An ultrasonic receiver according to the present invention includes: a wave propagating portion 6, which defines a first opening 63 and a waveguide 60 that makes an ultrasonic wave, coming through the first opening 63, propagate in a predetermined direction; and a propagation medium portion 3, which has a transmissive interface 61 and which is arranged with respect to the waveguide 60 such that the transmissive interface 61 defines one surface of the waveguide 60 in the direction in which the ultrasonic wave propagates. The interface 61 is designed and arranged with respect to the waveguide 60 such that as the ultrasonic wave propagates along the waveguide 60, each portion of the ultrasonic wave is transmitted into the propagation medium portion 3 through the interface 61 and then converged toward a predetermined convergence point. The receiver further includes a sensor portion 2, which is arranged at the convergence point 33 to detect the ultrasonic wave converged.

Abstract: The invention is the use of a number of barometric pressure sensors roughly surrounding one or more target location or locations for which wind is being predicted. Based on a historical relationship between the observed pressures at the sensors and the observed wind at the target locations, the prediction of winds a few seconds into the future is possible. It is anticipated that these pressure observations used to train the prediction engine may be supplemented with some other local data such as area wind direction, temperature, and time of day. Further, in some applications the training of the prediction engine may be only prior to its use, while in other applications, the training may be updating the prediction engine while the instrument is operating. In the specification, a theoretical foundation for the pressure/wind relationship is explored for signal magnitudes.

Abstract: A load sensing pin disposed to receive a load applied in a direction substantially transverse to a longitudinal axis of the pin. A load sensor is substantially fixedly oriented with respect to the applied load or alternatively with respect to the pin which is rotationally restrained with respect to a support structure. The load sensor is disposed to generate a load signal corresponding to strain of the pin resulting from the applied load.

Abstract: A torque sensor system comprising, an inner tooth, an outer tooth disposed on an outer yoke member centered on an axis spaced radially from the inner tooth, a plate member, a retainer member operative to retain the outer yoke member and the plate member, a magnet member centered on the axis disposed between the inner tooth and the outer tooth, an air gap partially defined by the plate member and the outer yoke member, and a magnetosensitive element disposed in the air gap operative to sense a magnetic flux induced by an angular displacement of the magnet member relative to the inner tooth and the outer tooth.

Abstract: The present invention provides a tactile sensor which can reproduce a sensor surface in contact with a sensing object and contribute to a reduction in cost of an automation system which utilizes an industrial robot, the tactile sensor including: a contact-portion unit 12 composed of a flexible material; a contact-portion housing unit 11 which surrounds and houses the contact-portion unit in a removable state while forming a posture so that a top portion of the contact-portion unit may project; and a strain sensing element 15 or a pressure sensing element embedded into the contact-portion housing unit.

Abstract: Device for taking samples of liquid from a collection container, characterised in that it comprises a support for liquid sample collection containers; a support for a set of containers into which the sample of liquid will be deposited; a support for connection elements; a container handling mechanism; and a device for inserting the containers into which the sample of liquid will be deposited into the connection element.

Abstract: The invention is a portable sampling system for sampling various media for contaminants. The media sample can include gases, liquids, and dry powders. The contaminant sample can include gaseous components, particulates of various kinds, and microorganisms. The system can be used to sample the surfaces of fruits and vegetables, meat carcasses, the interior of envelopes of other containers, gases in rooms or containers, and surfaces such as countertops, a vehicle exterior, skin, and clothing.

Abstract: The invention relates to a particle counter apparatus for counting particles in a fluid flowing in a pipe or a pipeline. The particle counter apparatus comprises a pipe portion through which the fluid flows, where the pipe portion is provided with a fluid sample outlet for withdrawal of a fluid sample. Furthermore the particle counter apparatus also comprises a first fluid transfer body extending from the fluid sample outlet to a particle counter, and a second fluid transfer body extending from the particle counter to a fluid return outlet mounted in the pipe portion downstream of the fluid sample outlet. In the pipe portion there is mounted a propeller unit comprising a propeller and a generator, with the result that particles are distributed uniformly in the fluid before the withdrawal of fluid samples, and electric power is provided for operation of the particle counter apparatus.

Abstract: A sensing device has at least two remote units mounted on an attachable tape, the remote units being mounted on separate branches of the attachable tape, a controller mounted on the attachable tape, electrical connections at least between each remote unit and the controller, the electrical connections on the attachable tape, and a surface to which the tape is attached such that the branches are separated from each other. A method of manufacturing a sensing device, including providing an attachable substrate, and fabricating electronic devices on the substrate, the electronic devices including at least two remote units, a controller and electrical connections between the remote units and the controller, and arranging the electronic devices such that at least two remote units are separated from each other.

Abstract: Solving Means A whole-body phantom A characterized by being obtained from a conductive rubber material comprising a rubber base and a conductive filler incorporated therein by molding the rubber material so as to copy the whole shape of a human body; and a process for producing a whole-body phantom, characterized by using a mold which conforms to the shape of a human body and is made of a fiber-reinforced plastic. Effect The whole-body phantom enables, with satisfactory handling, an examination of, e.g., influences of electromagnetic waves on the human body in various poses. The process for whole-body phantom production is suitable for use in producing such whole-body phantom.

Abstract: Provided is a reciprocating rotary power transforming apparatus that can simplify its structure, reduce loss of friction energy occurring from motion transformation, and perform transformation between a reciprocating rotary motion and a uni-directional rotary motion. The reciprocating rotary power transforming apparatus includes a reciprocating rotary axis performing a reciprocating rotary motion, a uni-directional rotary axis performing a unidirectional rotary motion, a housing being disposed so that the reciprocating rotary axis and the uni-directional rotary axis may be orthogonal to each other on the same plane and being supported to un-restrict its rotation, and a motion transforming unit being connected to the reciprocating rotary axis and being constructed to perform transformation between the reciprocating rotary motion and the uni-directional rotary motion by a conical rotary motion and a twisting motion when power is transferred to the reciprocating rotary axis or to the uni-directional rotary axis.

Abstract: A double clutch of a double clutch transmission is described and illustrated, and can include an inner clutch which is connected to an inner shaft and has an inner disk carrier for inner disks; an outer clutch which is connected to a hollow shaft arranged co-axially with respect to the inner shaft and has an outer disk carrier for outer disks; and a drive member arranged on a drive shaft and having inner and outer drive disks which can be operatively connected to the inner or outer disks and which form an inner clutch pack or an outer clutch pack together with the disks; wherein a common disk carrier for both clutch packs is attached to the drive member; the disk carrier includes two hubs associated with the clutch packs and engaged within one another; and each hub comprises a plurality of teeth.

Abstract: Each of reclining devices is formed so as to have a different size. An external gear wheel of each of the reclining devices has a diameter smaller than an internal gear wheel thereof and has a teeth number different from the internal gear wheel. The internal gear wheels and the external gear wheels of the connection devices respectively have the same teeth number as each other. The internal gear wheels and the external gear wheels of the connection devices are formed such that distances between centers thereof are equal to each other. Further, a meshing line of the internal gear wheel and the external gear wheel of each of the connection devices is formed between two curves defining a meshing range and is drawn as a line that extends from a side of a radially inwardly positioned curve in a circumferential direction in which the two curves are gradually spaced from each other and reaches to a side of a radially outwardly positioned curve.

Abstract: A roller screw structure comprises a nut, a screw and a rolling assembly. The rolling assembly is movably disposed between the nut and the screw and includes at least one rolling cone. The slantwise rolling surface of the rolling cone contacts the spiral groove surfaces of the nut and the screw in a line-to-line manner, and the angle between the rolling surface and the self-rotation axis of the rolling cone is from 0 degree to 6.3 degrees. Thereby, making the distance between the self-rotation axis and the rolling surface of the rolling cone of the rolling assembly different can prevent the occurrence of speed difference caused at different rolling paths of the rolling assembly.