Abstract: A remote fueling system is provided. The system comprises a wellbore servicing equipment unit comprising an internal combustion engine, a fuel tank coupled to the internal combustion engine, a fuel distribution channel, a fuel level sensor component, a fuel level indicator, and a fuel level indicator control box. The wellbore servicing equipment is mounted on a trailer upon which the wellbore servicing equipment is transported to the wellbore. The fuel level sensor component senses a fuel level inside the fuel tank. The fuel level indicator indicates a fuel level status of the fuel tank to remote fueling personnel at a standoff distance. The fuel level indicator control box is coupled to the fuel level sensor component and to the fuel level indicator and commands the indication presented by the fuel level indicator based on the fuel level inside the fuel tank sensed by the fuel level sensor component.

Abstract: A method of determining characteristics of fluids flowed between a wellbore and multiple zones intersected by the wellbore can include measuring a first distributed temperature profile of the fluids along the wellbore while the fluids flow in one direction through the wellbore, and measuring a second distributed temperature profile of the fluids along the wellbore while the fluids flow in an opposite direction through the wellbore. Another method can include flowing the fluids in a first direction through an annulus formed between tubular strings in the wellbore, measuring a first distributed temperature profile of the fluids while flowing the fluids in the first direction, flowing the fluids in a second, opposite direction through the annulus, and measuring a second distributed temperature profile of the fluids along the wellbore while flowing the fluids flow in the second direction.

Abstract: A probe includes a stem having a tip that measures a wake produced by an object moving through a fluid. The probe includes temperature and pressure sensors co-located in the tip.

Abstract: The present application provides an instrumentation rake for use with a number of flow paths. The instrumentation rake may include a manifold, a first rake body connected to the manifold, and a second rake body connected to the manifold. A number of first rake body aspirators may be positioned about the first rake body and in communication with a first flow path and a number of second rake body aspirators may be positioned about the second rake body and in communication with a second flow path.

Abstract: Method and apparatus for detecting leaks in a fluid vessel. The apparatus comprises a pressure sensor for measuring a pressure difference between a reference cell and a sample cell. The sample cell is open to the fluid vessel. The method and apparatus detects a leak in the fluid vessel when the pressure difference exceeds a predetermined threshold.

Abstract: The system for monitoring a liquid level in an underground storage tank provides an external visual indication of a liquid level, such as water level, within a sealed underground storage tank. The system includes an ultrasonic transducer for generating regularly pulsed ultrasonic signals and for receiving reflected ultrasonic signals, which are reflected from a surface of the liquid stored in the underground storage tank. A pulser connected to a timer is in communication with the ultrasonic transducer for generating regularly pulsed ultrasonic signals. The timer is further used to measure the time period between generation of one of the pulsed ultrasonic signals and reception of the corresponding reflected ultrasonic wave. The height between the ultrasonic transducer and the liquid surface is then calculated based upon the measured time period. The liquid level is then displayed to the user on an external display.

Abstract: A physical amount detecting device includes: one pair of driving vibration arms are bending-vibrated in a direction of a X-axis, one pair of first detection vibration arms and one pair of second detection vibration arms are vibrated in a direction of a Y axis, depending on a Coriolis force that is generated in accordance with rotational angular velocity of X-axis rotation, the one pair of the first detection vibration arms are bending-vibrated with a first phase in a direction of a Z axis in addition to vibration in the direction of the Y axis, and the one pair of the second detection vibration arms are bending-vibrated with a second phase, which is a phase opposite to the first phase, in the direction of the Z axis in addition to vibration in the direction of the Y axis.

Abstract: A vibration piece includes: a base portion; a first driving arm which extends in a first axis direction from one end of the base portion in the first axis direction; a second driving arm which extends in the first axis direction from the other end of the base portion in the first axis direction; driving electrodes which are respectively provided in the first driving arm and the second driving arm; a detection arm which extends in a second axis direction perpendicular to the first axis direction from the base portion; a detection electrode which is provided in the detection arm; and a support portion which extends from the base portion, wherein the support portion is provided so as to surround the detection arm.

Abstract: A structure having a first movable portion that is displaced perpendicular to a substrate surface and a second movable portion that is displaced parallel to the substrate surface is realized by a laminated structure, and manufacturing cost is reduced by employing a nested structure for the first movable portion and the second movable portion. The laminated structure is provided with a frame-like outer movable portion and an inner movable portion housed within the frame of the outer movable portion. A y spring is connected to the outer movable portion, and the outer movable portion is displaceably supported in a y-axis direction by the y spring at a height apart from an outer substrate. A z spring is connected to the inner movable portion, and the inner movable portion is displaceably supported in a z-axis direction by the z spring at a height apart from the outer substrate.

Abstract: A photoacoustic imaging apparatus includes a signal processor. The signal processor includes an adding unit configured to add received signals obtained by acoustic wave detecting devices to obtain a summed signal, a normalizing unit configured to normalize the summed signal for each acoustic wave detecting device with reference to an amplitude value in the received signal in the acoustic wave detecting device at the time when a maximum amplitude value in the summed signal is obtained to obtain a normalized signal, a reducing unit configured to subtract the normalized signal from the received signal for each acoustic wave detecting device to obtain a reduced signal in which the amplitude value in the received signal at the time when the maximum amplitude value in the summed signal is obtained is reduced, and an imaging unit configured to generate image data using the reduced signals.

Abstract: According to one embodiment, An ultrasonic flaw detecting apparatus comprising: a transducer in which a piezoelectric element array for transmitting ultrasonic waves to and receiving echo signals from a test object; an element driving unit for scanning the piezoelectric element array at a predetermined cycle and causing the ultrasonic waves; a synthesizing unit for synthesizing an internal image of the test object based on the echo signals received by the piezoelectric element array; and a signal replacing unit for replacing the received echo signal with an echo signal in which a bottom echo of the test object is removed.

Abstract: A pressure detecting device includes: a resonator whose oscillation frequency varies depending on a pressure; a first oscillation circuit that oscillates the resonator and outputs a signal of a frequency corresponding to the pressure; an AT-cut quartz crystal resonator; a second oscillation circuit that oscillates the AT-cut quartz crystal resonator and outputs a reference clock signal; a measuring unit that measures the reference clock signal by the use of a reciprocal counting method; a temperature detecting unit that detects a temperature of the resonator; and a storage unit that stores coefficients of a first approximating polynomial for calculating a first correction value used to compensate for a frequency-temperature characteristic of the measuring unit, wherein the frequency-temperature characteristic of the value measured by the measuring unit includes a frequency-temperature characteristic of the AT-cut quartz crystal resonator and a frequency-temperature characteristic of the resonator.

Abstract: Systems and methods of measuring pressure of fluid in a disposable IV set connected to a fluid supply pump is disclosed. At least one sensing arrangement coupled to the fluid supply pump is provided. A chamber having a movable element is provided, the movable element configured to move in response to changes in fluid pressure within the disposable IV set and thereby cause a change in a sensed measurement variable associated with the sensing arrangement without contacting the sensing arrangement. A measuring signal indicative of the sensed measurement variable is generated. The fluid pressure within the disposable IV set is determined based on the measuring signal.

Abstract: Dual piezoresistive transducers formed into a single silicon die, are anodically bonded to a pedestal. Two separate pressure ports extend through a plastic housing. The port openings inside the housing are surrounded by a groove having a shape and size that accepts the pedestal. A thin, liquid adhesive is deposited into the groove and allowed to level out. The pedestal is placed into the adhesive and embeds itself therein. Adhesive overflow into the ports is avoided by dimensioning the groove and depositing an amount of adhesive that will fill the groove but not overflow when the pedestal is placed therein. Once the adhesive cures, the adhesive bond strength is greater due to the adhesive being in shear relative to the groove side walls and pedestal sidewalls. The grooved structure provides an apparatus and methodology for precise die mounting and media sealing.

Abstract: An elastic material for pressure measurement, containing an elastic resin composition having at least either a urethane bond or a urea bond and being obtained by reacting an isocyanate with (A) a linear polyol and then curing the obtained prepolymer with use of a curing agent having two —NH2 groups in one molecule.

Abstract: A sensor apparatus may include an attachment member operatively attached to a closure member of an associated vehicle, a sensor housing substantially enclosing an associated pinching sensor, a neck portion connecting the sensor housing to the attachment member, and a seal extending from the neck portion and contacting a body portion of the associated vehicle when the closure member is in a closed position.

Abstract: The invention relates to a sensor (2) for measuring mechanical stress acting thereon. The invention is characterized in that the sensor has an oscillating, magnetorestrictive resonator plate (3) and the stress to be measured acts on the resonator plate (3) indirectly by way of a variable magnetic field. The variable magnetic field is preferably created by way of a bias plate (5) made of magnetorestrictive material, or at least one permanent magnet (15) as a result of the mechanical stresses acting thereon by the body (7) to be measured.

Abstract: A sealed sensor includes a test body configured as a deformable simple parallelogram, including a one-piece test body having a generally H- or X-shaped central opening extending therethrough, whose shape determines four hinge positions of the parallelogram, between the end of each arm of the opening and one face of the test body, and the thickness thereof. At least one hinge is a measuring hinge on one side of the test body. The outer face of the body has a recess and housing for strain gauges and circuits. At least one pair of side cavities define therebetween the width of the measuring hinge(s) and the thickness of the sheets of material connecting side edges of this measuring hinge to side edges of the test body corresponding to the hinge, preventing strains generated in the measuring hinges from being affected by strains from the side edges of the test body.

Abstract: There are provided a method by which a stress history of an object can be measured with high reliability if the object, which has temporarily been elastically deformed upon receiving an external force, recovers from the elastic deformation, and a composite material containing cement as a main component, of which a stress history can be measured with high reliability without reducing the strength of the material itself and without breaking the structure. To achieve the above-mentioned advantages, the method includes the steps of: acquiring an initial value of a twin density for calcite particles contained in an object to be measured that is elastically deformable upon receiving an external force; and measuring a history of stresses received by the object to be measured on the basis of a difference from the initial value in respect of the twin density for the calcite particles after the object to be measured receives the external force.

Abstract: A strain sensor apparatus for a rotatable shaft including an emitter/receiver, a vibration element attached to the shaft and arranged for receiving and reflecting signals to and from the emitter/receiver wherein the vibration element includes asymmetric stiffness properties between a radial and axial and/or circumferential directions relative to a rotational axis of the shaft.

Abstract: A collision detecting device and a collision detecting method are provided that enable accurate detection of a collision based on pressure change in a pressure chamber. A collision body discriminating system (10) is provided with: a chamber member (18) elongated in the vehicle width direction, having a pressure chamber (24) therein and provided in front of a bumper reinforcement (14); an absorber (20) elongated in the vehicle width direction and provided in front of the bumper reinforcement (14); a pressure sensor (22) for outputting a signal corresponding to a change in the pressure in the pressure chamber (24); and an ECU (26) for discriminating a collision body on the basis of a signal from the pressure sensor (22). The chamber member (18) and the absorber (20) are arranged in a vertical relationship with a gap (C) therebetween, and this allows the chamber member (18) and the absorber (20) to deform independently of each other when the collision body collides with the vehicle.

Abstract: The invention relates to an automatic pipetting device, which comprises at least two pumping units of different capacities and a liquid line, said liquid line opening on one side into a rinsing liquid reservoir and on the other side into a pipetting needle.

Abstract: A method for identifying and/or authenticating a material or an object, especially for the purpose of sorting materials or objects, includes: an excitation step including application of excitation vectors to a material or an object; a detection step in which the responses of the materials or objects subjected to the excitation vectors are detected; and a step of determining at least one item of information relating to the material or object on the basis of the responses obtained and of a pre-established look-up table. These steps will have been preceded by the incorporation, into or on the surface of the materials or objects, of at least one substance selected so as to react to at least one excitation vector and by the generation of a look-up table consisting of a set of one-to-one relationships between a combination of responses and an item of information relating to the material.

Abstract: A deceleration mechanism comprises a driving member, a driven member, an actuator device connected to the driving member, and a transmission member coiling around the driving member and the driven member. The transmission member comprises a positioning portion and a coiling portion extending from opposite sides of the positioning portion. The position portion is fixed to the driving member, the coiling portion coils a plurality of windings on the driving member, and then coils on the driven member. The number of windings of the transmission member coiled around the driving member is equal to or more than the transmission ratio of the deceleration mechanism.

Abstract: A transmission for an internal combustion engine that allows a fit length between a dog and a dog hole to be made longer and gear splines to be made longer, without having to increase an axial length of the transmission. A transmission selectively performs gearshifting by using a shift fork to slidingly move a shift gear of the transmission axially and by using a dog clutch to engage the shift gear with, or disengage the shift gear from, an adjacent gear. When the shift gear slidingly moves, a gear-side spline portion of the shift gear slidingly moves over a shaft-side spline portion.

Abstract: In a device for transmitting a torque to a rotary kiln (13), including a drive shaft driven by a motor and having a drive pinion driving a gear rim connected to the rotary kiln, the drive pinion (5) drives the gear rim (12) via an interposed transmission (6), wherein a gear wheel (7) of the transmission (6) engages with the drive pinion (5) in a manner displaceable in the axial direction.

Abstract: An adjustment device for adjusting a relative rotational angle position of two shafts (particularly a cam shaft and a crank shaft of an internal combustion engine) that has an adjusting gear which is designed as triple shaft gear and has a drive part connected to a first shaft (crank shaft), a driven part connected to a second shaft (cam shaft), and an adjustment shaft connected to a servomotor shaft of an electric servomotor in a rotationally fixed manner. In order to implement a wide temperature range for the operation of the adjustment device, a temperature sensor is arranged in the servomotor. In a method for operating an adjustment device or an actuator, the current of the servomotor or the actuator is controlled depending on the temperature that was determined earlier.

Abstract: A complex reduction mechanism of linear actuator includes a primary reducing unit and a secondary reducing unit arranged in an axial direction of the primary output shaft. The primary reducing unit includes a primary input shaft, a primary output shaft and a primary reducing set. The primary input shaft is rotationally drivingly coupled with a power output shaft of the power source for transmitting rotational power to the primary reducing set. The primary reducing set reduces the rotational speed and transmits the rotational power to the primary output shaft, which transmits the rotational power outward at lower rotational speed. The secondary reducing unit includes a secondary reducing set and a secondary output section. The secondary reducing set serves to reduce the rotational speed output from the primary output shaft and transmit the rotational power to the secondary output section for driving the actuation shaft to linearly axially reciprocally move.

Abstract: A driving force transmitting apparatus has a first division casing member having a first coupling surface, a second division casing member having a second coupling surface, wherein a casing is formed by matching the first and second casing members at the first and second coupling surfaces, a first rotational shaft rotatably supported by the first and the second division casing members, wherein a center of rotation of the first rotational shaft is located in a common plane of the first and second coupling surfaces, a first gear provided on the first rotational shaft, a second rotational shaft rotatably supported with respect to the first division casing member, a second gear provided on the second rotational shaft and being in mesh with the first gear, and a partition wall integrally formed on the second division casing member and extending in a direction intersecting with said common plane.

Abstract: A gearbox assembly for an actuator is provided. The gearbox assembly includes a rack, a spur pinion, a bevel pinion, and a bevel gear. Vertical translation of the rack causes rotation of the spur pinion and bevel pinion around a horizontal axis. The rotation of the bevel pinion causes rotation of the bevel gear around a vertical axis. The gearbox assembly may be coupled to a movable member of a valve so that actuation of the gearbox assembly moves the movable member. Systems including the gearbox assembly and methods of operation are also disclosed.

Abstract: A thrust reverser drive arrangement for driving a thrust reverser cowl for movement relative to first and second guide tracks is described which comprises a first actuator located, in use, close to the first guide track, a second actuator located, in use, close to the second guide track, and a third actuator, the actuators being arranged to be driven in synchronism and at the same speed by a drive motor to drive the cowl for movement, the third actuator being of smaller size and/or weight than the first and second actuators, and wherein the third actuator is provided with a load limiter to limit the transmission of loads through the third actuator in the event that the third actuator is subject to a compressive loading greater than a predetermined level.

Abstract: The invention relates to helical gearing having a spindle and a counterpart, which engages on a thread of the spindle. The counterpart is, for example, tube-shaped, encloses the spindle concentrically, and has rollers on the inside of the counterpart which roll on thread flanks of the thread. By rotation of the spindle, the counterpart is driven like the nut of a spindle drive. The thread of the helical gearing according to the invention is provided with a changing pitch and thus a changing gear ratio.

Abstract: A device and a method are provided for the actuation and for the control of an automatic transmission of a motor vehicle with at least one actuation element arranged on a steering device of the vehicle, which is designed for the manual selecting or activating of an operating state of the vehicle and/or of its transmission, wherein the at least one actuation element is optionally transferred into a rest position or into an actuation position and wherein the actuation element can be exclusively actuated in the actuation position for selecting or activating the transmission or vehicle function, while in its rest position it stays in a position that is not visible to the driver.

Abstract: There is provided, in one aspect of the present description, an automatic transmission. In one example, the automatic transmission comprises a transmission case, a valve body which is arranged in the transmission case, a control valve mechanism which controls oil pressures in parts of the automatic transmission and is installed in the valve body, and a solenoid valve which is attached to the valve body and is arranged at a first side of the valve body and in the transmission case. The automatic transmission further comprises an electronic control unit which controls the solenoid valve, is attached to the valve body, and is arranged at a second side of the valve body that is opposite to the first side across the valve body.

Abstract: A robot arm assembly includes a first robot arm and a second robot arm rotatably connected to the first. The first robot arm includes a first input shaft and a second input shaft. The second robot arm includes a sleeve and an output shaft partially received in the sleeve. The sleeve of the second robot arm is rotated relative to the first robot arm via a pair of bevel gears. The output shaft is rotated relative to the sleeve via a plurality of bevel gears which cooperatively form a polygon.

Abstract: A robot arm assembly includes a first robot arm and a second robot arm rotatably connected to the first robot arm. The first robot arm includes a first sleeve, a first input shaft, and a second input shaft. The first input shaft and the second input shaft are seated in the first sleeve. The second robot arm includes a second sleeve and an output shaft received in the second sleeve. The first input shaft is connected to the second sleeve via a pair of bevel gears, and drives the second sleeve to rotate relative to the first sleeve. The second input shaft is connected to the output shaft via at least two pairs of bevel gears, and drives the output shaft to rotate relative to the second sleeve.

Abstract: A switch for a vehicle includes: a first operating member provided on a mounting surface of the vehicle, the first operating member being operable by tilting; and a plurality of projections provided on the first operating member, the projections being operable by pushing, wherein the first operating member is shaped line symmetrically so that a central part of the first operating member is dented most; and the projection projects forward with respect to the central part of the first operating member, and the projection is uplifted along an outer wall part of the first operating member.

Abstract: A connecting member includes a male screw portion, a cable insertion portion, a locking portion, and a crimping portion. The male screw portion is provided at a first end of the connecting member. The cable insertion portion is provided at a second end, opposite to the first end, of the connecting member, and has a closed-bottomed hole into which one end of an inner cable is to be inserted. The locking portion is provided on outer circumference of the connecting member between a bottom of the closed-bottomed hole and the second end, and has a shape which can be caught with a part of an operation object in a circumferential direction of the male screw portion. The crimping portion is provided on the outer circumference between the bottom of the closed-bottomed hole and the second end, and configured to crimp the one end of the inner cable.

Abstract: A method for coating a steering wheel and a corresponding steering wheel having a steering wheel rim comprising a steering wheel skeleton having a foam layer applied thereto and intended to be encompassed by a cover layer made of leather or plastic are provided. In order to simplify production, the cover layer is positioned on the steering wheel rim as a strip and is fixed to the foam layer on one end. The cover layer strip is then glued onto the foam layer and the lateral edges of the cover layer strip are sewed together in a known manner.

Abstract: A high speed flywheel system, including a flywheel mounted on a shaft, the flywheel being located within an evacuated chamber within a housing, wherein the chamber is sealed by seals including a cavity containing sealing fluid, wherein the seal cavity can be topped up with sealing fluid from a reservoir, the reservoir having an aperture open to the atmosphere for pressure equalization, the flywheel housing being mounted on the shaft via a bearing arrangement including at least one bearing situated externally to the chamber.

Abstract: Disclosed are an anti-abrasion device and a reciprocating compressor having the same, whereby a sleeve is fabricated with an outer diameter smaller than an inner diameter of a connecting rod to be non-press-fitted, thereby facilitating an assembly of the sleeve, and also the deformation of an inner diameter of the sleeve is prevented during the assembly of the sleeve, thereby preventing beforehand an increase in an input load of a motor unit due to the deformation of the sleeve and an abrasion of a pin of a crankshaft.

Abstract: The present invention is related to a manpower driven device being able to perform specific bi-directional pedaling to provide constant directional output for driving the loading wheel train thereof, wherein its pedaling direction is selected by the rider according to his/her operating statuses of the muscles and joints, or further through the input in different driving directions to perform output in the same directional rotation and same speed ratio.

Abstract: A vehicle includes an internal combustion engine configured to power a hydraulic pump to pressurize hydraulic fluid, which is used to power the vehicle directly or is stored in an accumulator. A drive module, including a hydraulic pump/motor and a multi-speed mechanical transmission, is operatively coupled to drive wheels of the vehicle to provide motive power to the vehicle. The drive module can also include a second hydraulic motor (or multiple hydraulic motors) configured to provide motive power. The transmission is configured to progress through its gears at ratio shifts of no less than 2:1 between adjacent gear positions. The transmission is configured to place the hydraulic motor in neutral during some portions of vehicle operation, and to engage the motor during other portions of vehicle operation.

Abstract: The invention discloses a novel and efficient drive mechanism for use in a variety of applications. This novel mechanism replaces traditional stepper motors or another analogous art with shape memory alloys. The drive mechanism so disclosed provides substantial operational benefits over conventional motors and other such traditional drive mechanisms that would be used in similar applications. The drive mechanism includes a high gear-ratio worm gear and worm drive which further provides precise, controlled movement of an output shaft. In the illustrative use elaborated upon herein, the motor is used to drive a photovoltaic panel so that the panel may remain in appropriate alignment with the sun throughout the day.

Abstract: An ore fine agglomerate to be used in a sintering process is disclosed, wherein the ore fine agglomerate is formed by a mixture of ore fine particles and an agglomerating agent, and wherein the particles have diameters between 0.01 mm and 8.0 mm. A production process of ore fines agglomerate is disclosed comprising the steps of using ore fine particles with a granulometry lower than 0.150 mm, mixing the ore fine particles with an agglomerating agent in a ratio of 0.5 to 5.0% by mass of sodium silicate, forming wet particles with diameters between 0.01 mm and 8.0 mm with an addition of water, and drying the wet particles at a temperature varying from 100° C. and 150° C. to form dry particles that are resistant to mechanical efforts and the elements.

Abstract: A process for the recovery of nickel and/or cobalt from laterite or partially oxidised lateritic ores having a substantial proportion of the iron present in the ferrous state, said process including the steps of: a) providing a laterite or partially oxidised laterite ore wherein a substantial proportion of the iron present in the ore is in the ferrous state; b) acid leaching the ore to provide a product leach solution containing at least ferrous iron, nickel and cobalt together with acid soluble impurities; and c) recovering the nickel and cobalt from the product leach solution with a selective ion exchange resin in an ion exchange process leaving the ferrous iron and other acid soluble impurities in the raffinate.

Abstract: A scribing wheel for a brittle material includes a circumferential ridgeline in which two truncated cones have connected bottoms so as to share a rotational axis. Alternating notches and protrusions are formed along the circumference ridgeline. The protrusion are portions of the ridgeline remaining after the ridgeline is notched. The length of the notches is less than that of the protrusions so that a catch on the surface is improved while lowering the high penetrability.

Abstract: A combination beverage can opener and cover comprises a semi-circular sheet of plastic having a top surface and a bottom surface and a straight diametric edge having an arcuate notch located proximate the center of the edge. A tab is connected by a living hinge to a circumferential edge of the device midway along its circular perimeter. When used as an opener for a beverage can having a stay-on tab, the device is first slipped under the can's pull ring and used to lift the pull ring so as to rupture the prescored tab and bend it down into the can. To affect closure, the device is rotated about the can's rivet attachment until the semicircular sheet of plastic overlays the opening through which the contents are dispensed.

Abstract: A wrench for different-sized nuts includes a handle having an opening at a first end thereof and a slot communicated with the opening, an adjustment screw threadedly inserted into the handle and passing through the slot for adjusting a gap of the slot, a first working head rotatably connected with the first end of the handle in such a way that one of first and second mounting portions of the first working head is selectively positionable in the opening of the first end of the handle, and different-sized first and second ratchet sockets rotatably and respectively mounted with the first and second mounting portions. By means of the adjustment screw, the rotationability of the first working head relative to the first end of the handle can be adjusted.

Abstract: A folding tool includes two support plates, a ratchet driver pivotally mounted between the two support plates, a rotation seat rotatably mounted between the two support plates, and a plurality of tips each removably mounted on the rotation seat and each detachably mounted on the ratchet driver. The ratchet driver drives each of the tips to rotate in the operation direction only and idles in the opposite direction so that each of the tips can rotate the screw member in the operation direction successively so as to screw or unscrew the screw member easily and quickly. Thus, when the folding tool is used in a smaller space, each of the tips is driven by the ratchet driver to rotate the screw member in the operation direction successively and to screw or unscrew the screw member easily and quickly.