Class / Patent application number | Description | Number of patent applications / Date published |
073009000 | FRICTIONAL RESISTANCE, COEFFICIENT OR CHARACTERISTICS | 62 |
20080202202 | Tactile Sensor and Use Thereof - A tactile sensor of an embodiment of the present invention includes: a sensing section having an elastic member at a portion which contacts a measurement target; an image acquiring section for acquiring as image information the state of a contact surface of the measurement target and the elastic member, before and after application of an external force tangential to the contact surface; a deformation analyzing section for analyzing deformation information of the contact surface, based on the image information acquired by the image acquiring section; an external force detecting section for detecting the external force applied tangential to the contact surface; and an estimating section for estimating a slippage margin between the measurement target and the elastic member, based on (I) the deformation information of the contact surface, which information acquired by the deformation analyzing section, (II) the external force detected by the external force detecting section, and (III) an object constant of the elastic member. With this tactile sensor, slippage margin can be simply but accurately estimated. | 08-28-2008 |
20080202203 | Piston delamination testing apparatus - A piston testing apparatus is provided including a housing having an inner wall and defining a cavity therethrough; a piston disposed in the housing cavity and having a polymer coating deposited thereon, wherein the polymer coating of the piston contacts the housing inner wall; a connecting rod coupled to the piston; and an actuating means coupled to the connecting rod and configured to provide a reciprocating movement of the piston through the cavity. An injection plate for the piston testing apparatus and a method for challenging an adhesion of the polymer coating to the piston are also described. | 08-28-2008 |
20080250843 | Method For Calculating a Friction-Slippage Curve For a Tire - A method for calculating a μ-slippage curve for a tire based on laboratory data derived from characteristic values of a used compound, of the road surface and a vehicle without producing a complete tire, and a method for calculating a μ-slippage curve for a tire include the steps: calculating a friction force between rubber compound and a rough surface based on a friction coefficient for different slippage values and lateral positions of the tire wherein the friction coefficient is calculated depending on a sliding velocity between the rough surface and a tread block and on a temperature of the tire. After calculating the friction force, the motion of a tread block depending on pressure distribution during the movement of the tread block through the contact area and on characteristics of a tire body is calculated. The resulting μ-slippage curve is composed from effective μ-slippage values for different slippage values wherein effective μ-slippage values are calculated based on the friction force and a nominal force derived from the pressure distribution. | 10-16-2008 |
20090071228 | Method for Measuring Surface Smoothness of Hair - A method for measuring the surface smoothness of hair comprising the steps of:
| 03-19-2009 |
20090107210 | Portable Friction Testing Device - A portable device for measuring friction, especially friction between tire treads and road surfaces is disclosed. The portable friction tester is shaped as an equilateral triangle providing three points of contact for samples in the road surface. | 04-30-2009 |
20090139302 | RESONANCE RESPONSE TESTING ON A BEARING - An apparatus and associated method is provided for holding an inner race of a bearing stationary with respect to rotational movement while leaving a hub that is fixed in rotation with an outer race of the bearing unencumbered. The hub is excited by contactingly engaging it with a predetermined mechanical force. The resonance response of the hub to the excitation is determined and used to characterize the bearing qualitatively. | 06-04-2009 |
20090173137 | Roadway Grip Tester and Method - A method for measuring road surface friction of a road surface uses a vehicle that moves across the road surface wherein (1) an auxiliary independent wheel assembly is towed behind the vehicle and is in contact with the road surface, an auxiliary wheel of the wheel assembly is freely rotatable by movement of the vehicle and is one or more of toed in or toed out with respect to a direction of travel of the vehicle so as to create an isolated axial force on the auxiliary wheel: (2) the axial force on the auxiliary wheel is measured while the vehicle moves across the road surface, and the measured axial force is correlated with the road surface friction. The independent wheel assembly is load isolated from the weight of the towing vehicle and the independent wheel assembly is loaded by placing ballast thereon. | 07-09-2009 |
20090293586 | Device for Measuring Coefficient of Friction - A device for measuring the coefficient of friction between a test surface and a test material, comprising a frame, a skid pad comprising the test material and attached to an underside of the frame to contact the test surface, a longitudinal force measuring device attached to the frame and having an axis, and a longitudinal pulling assembly exerting a longitudinal pulling force on the drag sled and the longitudinal force measuring device. The longitudinal force measuring device is capable of outputting data indicative of the longitudinal force applied to the device. The longitudinal pulling force is vertically aligned with the axis of the longitudinal force measuring device. | 12-03-2009 |
20090320555 | TEST DEVICE FOR TRIBOLOGICAL EXAMINATION OF MATERIALS - A test device for the tribological examination of materials, including at least one first test body that has a first test surface, a drive unit for this at least one first test body that can be driven in oscillating and/or rotating fashion, a measurement device for measuring forces that act on the one hand essentially parallel to the direction of an oscillating introduction of force and/or in the circumferential direction of a rotational introduction of force of the drive unit of the at least one second test body and on the other hand for acquiring the test forces that act between the at least one first test body and the at least one second test body, in addition, a load regulating device is provided that regulates the test force acting between the two test bodies, the prespecified test force being applied to the test bodies with the aid of a decoupled bearing of the drive unit. | 12-31-2009 |
20090320556 | MONITORING APPARATUS - The invention provides a device for measuring the dynamic coefficient of friction of a surface. The device includes a track having an arcuate portion which is shaped to mimic an arc of travel of a pendulum; a shoe mounted so as to be movable along the track, and a biasing device for biasing part of the shoe into contact with the surface as it moves along the arcuate portion of the track; a propulsion device for providing an initial propulsion force to propel the shoe along the track; a velocity detector for measuring the velocity of the shoe at a plurality of points during its travel along the track; and computing means for calculating the coefficient of friction from changes in velocity of the shoe as it moves along the track. | 12-31-2009 |
20090320557 | MEMS Stiction Testing Apparatus and Method - A MEMS stiction testing method applies a first electrical signal to a MEMS device having two opposing surfaces to cause the two opposing surfaces to make physical contact. The two opposing surfaces produce a second electrical signal when in physical contact. The method then substantially mitigates the first electrical signal after detecting that the second electrical signal has reached a prescribed maximum value. | 12-31-2009 |
20100089119 | FORMING CONDITION DETERMINATION METHOD AND FORMING CONDITION DETERMINATION SYSTEM - A forming speed determination method for determining a forming speed of a press-processing device with a plurality of measurement points on a sheet material to conduct press-forming of the sheet material with a press-processing device at a predetermined forming speed. Strain states at respective points on the press-formed sheet material are plotted on a forming limit diagram including the forming limit curve of a sheet material to produce a strain distribution chart. Subsequently, the closest point to the forming limit curve among the points is defined as a specific measurement point. When this specific measurement point is located in the bulge region, the forming speed of a press-processing device is decreased to be slower than the above-mentioned predetermined forming speed. Meanwhile, when this specific measurement point is located in the draw region, the forming speed of a press-processing device is increased to be faster than the above-mentioned predetermined forming speed. | 04-15-2010 |
20100107726 | DEVICE FOR DETERMINING THE COEFFICIENT OF FRICTION OF DIAMOND CONDITIONER DISCS AND A METHOD OF USE THEREOF - A device for determining the coefficient of friction of diamond conditioner discs and a method of use thereof. The device is a solid base means comprising a block of granite with a smooth flat upper surface, a diamond conditioner disc counter surface means comprising a removable sheet of polycarbonate, a means for moving the diamond conditioner disc comprising an assembly parallel to and perpendicular to the surface of the said slab and overlain material along which a plate, the surface of which is parallel to the surface of the assembly and perpendicular to the surface of the said slab and overlain material, is moved by a screw, a means for securing the diamond conditioner disc comprising a holder bolted to the said plate that is capable of riding just above the surface of the slab and overlain material with an anterior face with respect to the direction of motion that is concave and capable of securely holding a diamond conditioner disc placed grinding face down upon the said overlain material the top of which is open so that load may be applied to the diamond conditioner disc and a means for measuring the shear force imparted by the moving diamond conditioner disc comprising a load cell. Shear force and down force are determined using the above apparatus and the coefficient of friction of the diamond conditioner disc and the said sheet are calculated therefrom. | 05-06-2010 |
20100192665 | Friction Measuring Device - Friction against a road surface is measured by a friction measuring device that is pulled along behind a car. At the side of a main unit ( | 08-05-2010 |
20100223977 | METHODS FOR ASSESSING MOUTHFEEL ATTRIBUTES OF FOODS USING A TRIBOLOGY DEVICE - The invention relates to a method for differentiating foods with respect to mouthfeel, a method for identifying a composition having the ability to improve the mouthfeel of a food, and a method for predicting mouthfeel attributes of a food using a novel tribology device. | 09-09-2010 |
20100229625 | TRIBOLOGY DEVICE FOR ASSESSING MOUTHFEEL ATTRIBUTES OF FOODS - This invention relates to a tribology device for assessing mouthfeel-related tribological properties of a food sample, comprising a measuring surface composed of a thermoplastic polymer as an integral part. | 09-16-2010 |
20110000278 | DEVICE FOR MEASURING THE INFLUENCE OF FRICTION FORCE ON THE WEAR CHARACTERISTICS OF A MATERIAL SURFACE - A device for the measurement of the influence of friction force on the wear characteristics of a material surface comprises a frame with a cover. A shaft is installed in the frame. A moveable element of a friction pair is fixed on the shaft. A holder of a pressed element of the friction pair and a clamp which applies a regulated load on the holder with the pressed friction element are installed in the cover. The holder of the pressed friction element is installed in a holder frame with first membranes which allow the motion only perpendicular to the axis of holder frame. The holder-frame is installed in the cover also with second membranes that allow it to move only in its axial direction. The system of the membranes damps the impact of inertial forces on the friction pair. | 01-06-2011 |
20110209521 | DEVICE AND METHOD FOR ESTIMATING FRICTIONAL CONDITION OF GROUND SURFACE WITH WHICH VEHICLE IS IN CONTACT - Apparatus (or method) for estimating a gripping characteristic of a vehicle wheel of a vehicle on a ground contact surface includes first input section (or step), a second input section (or step) and an output section (or step). The first input section sets a first input which is a ratio of a first wheel force acting on the vehicle wheel in the ground contact surface in a first direction, and a first wheel slip degree. The second input section sets a second input which is a ratio of a second wheel force acting on the vehicle wheel in the ground contact surface in a second direction, and a second wheel slip degree of the vehicle wheel. The output section determines, from the first and second inputs, an output which is a grip characteristic parameter indicative of the gripping characteristic of the vehicle wheel. | 09-01-2011 |
20110252863 | On-Board Water Spray System For Aircraft - A system for simulating wet runway conditions by using a liquid container that is placed inside an aircraft. The liquid container is connected to a nozzle that sprays water in front of the wheels of the aircraft. A valve is used to control the flow of water from the nozzle. Systems, such as the braking system of the aircraft, can then be tested in wet runway conditions simulated by the system. The amount of water sprayed from the nozzle can also be electronically controlled in relation to the speed of the aircraft, such that the nozzle sprays a nearly uniform layer of liquid in front of the wheels. The system can also be modified to include two tanks to manipulate the center of gravity of the aircraft. | 10-20-2011 |
20120024038 | METHOD FOR DETERMINING THE COEFFICIENT OF FRICTION IN A VEHICLE - A method and an arrangement for determining the coefficient of friction in a vehicle are proposed. In the method, the lateral guidance force at the at least one steered wheel is determined, wherein a steering rack force is sensed and a restoring torque at the steered wheel is determined as a function of the steering rack force and the lateral guidance force as a function of a caster, and the coefficient of friction is determined on the basis of the restoring torque. | 02-02-2012 |
20120031164 | METHOD FOR FRICTION COMPENSATION IN A DEVICE WITH FORCE FEEDBACK PROVIDED WITH CABLE TRANSMISSION - A method of compensating friction in a force-feedback device comprising a control member manipulated by a user and coupled to a tensioned cable that is actuated by a motor and gearbox unit. The method includes the steps of (1) detecting a variation in the sag of the cable caused by a manipulation of the control member, and (2) in response to such a detection, controlling the unit so that it develops a force (Fa) that compensates, at least in part, for the internal friction (Rsa) of the unit that opposes movement of the control member manipulated by the user. | 02-09-2012 |
20120144896 | APPARATUS TO DETERMINE COEFFICIENT OF FRICTION - The invention provides an apparatus for the continuous measurement of the dynamic coefficient of friction and/or static coefficient of friction of a material, which comprises at least the following: A) two rotating rollers, R | 06-14-2012 |
20120167662 | METHODS TO DETERMINE THE DURABILITY AND WEAR-RESISTANCE OF SOFT ARMOR - Methods to determine the durability and wear-resistance of soft armor. Observations on field tested articles of soft body armor indicate that the materials are subject to a combination of flexing, tensile, compressive and abrasive forces. The forces and stresses to which soft armor articles are subjected to can be duplicated in a controlled, isolated, measurable, appropriate and intuitive manner, to correlate ballistic performance with durability and wear characteristics. The tests closely approximate the forces and stresses experienced in the end use of ballistic resistant composite articles. | 07-05-2012 |
20120167663 | LASER-BASED METHOD FOR FRICTION COEFFICIENT CLASSIFICATION IN MOTOR VEHICLES - A sensor arrangement for capturing the coefficient of friction from a roadway surface, wherein the sensor arrangement is arranged on a motor vehicle and includes at least one radiation emitter unit and at least one electronic evaluation circuit, wherein the radiation emitter unit emits electromagnetic radiation toward the roadway surface and the radiation is at least to some extent reflected and/or scattered at the roadway surface and the reflected and/or scattered radiation is at least to some extent captured in the radiation emitter unit and/or in one or more additional sensor units, wherein the electronic evaluation circuit is designed such that it ascertains a piece of coefficient-of-friction information for the roadway surface from the intensity of the reflected and/or scattered radiation or a variable which is dependent thereon. | 07-05-2012 |
20120186325 | DEVICE AND METHOD FOR DETERMINING THE FRICTION BETWEEN PLASTIC HOLLOW BODIES OF THE SAME MATERIAL COMPOSITION | 07-26-2012 |
20120192616 | CLAMPING JIG, A FRICTION TESTING DEVICE HAVING THE CLAMPING JIG, AND FRICTION TEST METHOD - A clamping jig for clamping a test object includes a first clamping member extending in a left-right direction, two second clamping members connected to and extending transversely of the first clamping member and spaced apart from each other in the left-right direction, and a third clamping member connected to and extending transversely of the second clamping members. The third clamping member is movable along the second clamping members in a front-rear direction to adjust a distance between the first and third clamping members. The first, second, and third clamping members are adapted to clamp therebetween the test object. | 08-02-2012 |
20120222466 | DEVICE - Device for measuring hair damage comprising a handle ( | 09-06-2012 |
20120240660 | INTRINSICALLY-CALIBRATED TRIBOMETER - Intrinsically calibrating friction mensuration device has a drive unit with controllable motive member, configured to receive a controllable propulsion force, and to apply tractive force to a test piece on a surface. A force engine couples to the motive member, and applies the controllable propulsion force. The device includes a controller imposing a propulsion control signal actuating the force engine to produce the propulsion force. A force sensor is between the drive unit and the test piece, producing a force signal responsive to a sensed force between the drive unit and the test piece. The drive unit can self-propelled or stationary. A method includes applying an increasing tractive force to a test piece at rest; measuring the tractive force; identifying the maximum tractive force applied at incipient motion; identifying the transition between the resting test piece and incipient motion; determining the SCOF; continue motion and determine the DCOF. | 09-27-2012 |
20120266651 | GOLF BALL - On the basis of a surface shape appearing at a predetermined point moment by moment during rotation of a golf ball having numerous dimples on its surface, a data constellation regarding a parameter dependent on a surface shape of the golf ball is calculated. A preferable parameter is a distance between an axis of the rotation and the surface of the golf ball. Another preferable parameter is a volume of space between a surface of a phantom sphere and the surface of the golf ball. Fourier transformation is performed on the data constellation to obtain a transformed data constellation. On the basis of a peak value and an order of a maximum peak of the transformed data constellation, an aerodynamic characteristic of the golf ball is determined. The peak value and the order of the maximum peak are calculated for each of PH rotation and POP rotation. | 10-25-2012 |
20130067986 | SHAVING MEASUREMENT METHOD AND APPARATUS - A shaving measurement apparatus, comprising a pad having a top surface, an arm configured to hold a cartridge, the cartridge having a contact surface, and the arm being moveable relative to the pad to bring the contact surface of the cartridge into contact with and/or away from the top surface of the pad, and to move the cartridge along the pad with the contact surface in contact with the top surface, and a sensor coupled to the cartridge for measuring a load on the cartridge as it is moved relative to the pad, and a method of using the same. | 03-21-2013 |
20130074576 | ROAD FRICTION COEFFICIENT ESTIMATING UNIT AND ROAD FRICTION COEFFICIENT ESTIMATING METHOD - A road friction coefficient estimating unit calculates a tire sideslip angle and a cornering force, and estimates a road friction coefficient on the basis of the ratio of the calculated cornering force to the calculated tire sideslip angle. A vehicle travels on multiple road surfaces that differ in road friction coefficient, and tire sideslip angles and cornering forces on the road surfaces are detected in advance. The road friction coefficient estimating unit stores, in a memory, a correlation among the detected tire sideslip angles, the detected cornering forces, and the road friction coefficients in the form of numerical values or a mathematical expression, and estimates a road friction coefficient using the correlation stored in the memory. | 03-28-2013 |
20130167614 | FRICTION SENSOR FOR POLISHING SYSTEM - A system method and apparatus to monitor a frictional coefficient of a substrate undergoing polishing is described. A polishing pad assembly includes a polishing layer including a polishing surface, and a substrate contacting member flexibly coupled to the polishing layer having a top surface to contact an exposed surface of a substrate. At least a portion of the top surface is substantially coplanar with the polishing surface. A sensor is provided to measure a lateral displacement of the substrate contacting member. Some embodiments may provide accurate endpoint detection during chemical mechanical polishing to indicate the exposure of an underlying layer. | 07-04-2013 |
20130180313 | APPARATUS FOR DETERMINING THE INTER-FIBER FRICTIONAL COEFFICIENT - Disclosed is an apparatus for determining the inter-fiber frictional coefficient of staple fibers. The apparatus comprises a pair of clamps, one fixed and the other mobile wherein, each clamp receives an end portion of a sliver therewithin. The apparatus further comprises a pair of predetermined weights, each mounted over a clamp in order to exert normal force on either end of the sliver whereby the movement of the sliver within the clamps is resisted as the mobile clamp is moves away from the fixed clamp until the sliver is severed off, a force sensor for sensing the tensile force exerted by the sliver, and a means for computing the inter-fiber frictional coefficient, which is a function of the normal force and the amount of tensile force exerted by the sliver which overcomes the inter-fiber frictional force of the sliver. | 07-18-2013 |
20130180314 | Apparatus for Measuring the Relative Speed of a Golf Putting Green - The measuring apparatus is in form of a bar having inclined parallel surfaces on each longitudinal side to define a ramp for rolling of a golf ball thereon with three notches in the ramps at different distances from the ends of the bar. Each notch is associated with a scaling factor to obtain the speed of a level green. The longest notch from one end of the bar is marked with a scaling factor of 1.00, the middle notch is marked with a scaling factor of 1.83, and the shortest notch from an end of the bar is marked with a scaling factor of 3.34. | 07-18-2013 |
20130233049 | METHOD FOR ASSESSMENT OF FRICTION PROPERTIES OF FIBERS OR SUBSTRATES UPON MECHANICAL TREATMENT - Method for assessment of friction properties of fibers or substrate. The method is useful for assessing the degree of damage of hair fibers, for demonstrating the efficacy of a composition for minimizing the friction properties of fibers or substrate and/or for supporting advertising claims. | 09-12-2013 |
20130255355 | Method of Use of Substrate Having Properties of Keratinous Tissue - Method of evaluating a product by applying a substance to the surface of an artificial substrate to form a substance-coated surface and performing an analysis of the substance-coated surface. The surface of the substrate may have one or more of the following properties: a total surface energy of from about 15 mJ/m | 10-03-2013 |
20130276511 | METHODS AND APPARATUS FOR ANALYZING EFFECTS OF FRICTION ON PROCESS CONTROL DEVICES - Methods and apparatus for analyzing effects of friction on process control devices are disclosed herein. An example method includes determining a value corresponding to friction of an actuator and a process control device to be operated by the actuator, and determining a value indicative of an effect of the friction on operation of the process control device via the actuator based on the value corresponding to the friction and a predetermined value. | 10-24-2013 |
20130291621 | CONTROL DEVICE, CONTROL METHOD AND PROGRAM - A control device includes a force detector configured to detect a force in a normal direction and a force in a shearing direction of fingertips of a robot hand device respectively as a normal force and a shearing force, and an object detector configured to calculate a friction coefficient using the normal force and the shearing force detected by the force detector and to detect whether or not a thin-film object having a maximum friction coefficient different from a maximum stationary friction coefficient between the fingertips is grasped between the fingertips on the basis of the calculation result. | 11-07-2013 |
20140013821 | Method of Evaluating Friction Stir Welding Defects - A method of evaluating defects in a friction stir welded seam is provided, the method including: providing a welded sheet of metallic stock, the sheet having a top edge and a bottom edge, opposed side edges, and a joining seam formed between the opposed side edges by means of friction stir welding; isolating a preselected test specimen from the sheet of welded metallic stock, the specimen comprising either the top edge or the bottom edge and a test portion of the seam, with the test portion extending from an intermediate point to either the top or bottom edge and having a longitudinal axis, so that said test portion is disposed perpendicularly to the longitudinal axis, thereby establishing a test specimen face and a weld root; and detaching the specimen from the sheet and then testing the integrity of said weld root. | 01-16-2014 |
20140013822 | INTRINSICALLY-CALIBRATED TRIBOMETER - Intrinsically calibrating friction mensuration device has a drive unit with controllable motive member, configured to receive a controllable propulsion force, and to apply tractive force to a test piece on a surface. A force engine couples to the motive member, and applies the controllable propulsion force. The device includes a controller imposing a propulsion control signal actuating the force engine to produce the propulsion force. A force sensor is between the drive unit and the test piece, producing a force signal responsive to a sensed force between the drive unit and the test piece. The drive unit can self-propelled or stationary. A method includes applying an increasing tractive force to a test piece at rest; measuring the tractive force; identifying the maximum tractive force applied at incipient motion; identifying the transition between the resting test piece and incipient motion; determining the SCOF; continue motion and determine the DCOF. | 01-16-2014 |
20140060149 | APPARATUS FOR DETERMINING COEFFICIENTS OF FRICTION - The apparatus for determining coefficients of friction collects data required for determining static and dynamic coefficients of friction between various materials. The apparatus includes a ramp with adjustable slope and a plurality of test masses for placement on the ramp. Upslope lights and sensors, downslope lights and sensors, and a digital angle meter are installed on the ramp. The apparatus has a timing device having a display to show the elapsed time between a test mass passing the upslope sensor and the downslope sensor. The operator can determine the static coefficient of fraction from the tangent of the angle displayed on the digital angle meter when a test mass first begins to slide, and can compute the kinetic coefficient of friction from the angle displayed on the digital angle meter and the elapsed time shown on the timing device. | 03-06-2014 |
20140109647 | System for Determining Coefficients of Seal Friction - A system for determining a hydraulic seal coefficient of friction of a hydraulic cylinder includes a force sensor to provide a force signal indicative of a force of the cylinder. A controller is configured to receive a plurality of first force signals at a first load and determine a first friction force and receive a plurality of second force signals at a second load and determine a second friction force. A hydraulic seal coefficient of friction is determined based at least in part upon the first friction force and the second friction force. A method is also disclosed. | 04-24-2014 |
20140116109 | INTRINSICALLY-CALIBRATED TRIBOMETER - Intrinsically calibrating friction mensuration device has a drive unit with controllable motive member, configured to receive a controllable propulsion force, and to apply tractive force to a test piece on a surface. A force engine couples to the motive member, and applies the controllable propulsion force. The device includes a controller imposing a propulsion control signal actuating the force engine to produce the propulsion force. A force sensor is between the drive unit and the test piece, producing a force signal responsive to a sensed force between the drive unit and the test piece. The drive unit can self-propelled or stationary. A method includes applying an increasing tractive force to a test piece at rest; measuring the tractive force; identifying the maximum tractive force applied at incipient motion; identifying the transition between the resting test piece and incipient motion; determining the SCOF; continuing motion; and determining the DCOF. | 05-01-2014 |
20140202230 | A FRICTION TESTING POSITIONING DEVICE - A friction testing positioning device ( | 07-24-2014 |
20140290330 | FILTER CAKE DRAG TESTER - A method that includes pulling a sled disposed on a trough across a first filtercake at a constant speed, measuring a force versus distance or time based on the pulling; and outputting a frictional force curve is described. An apparatus that includes a base, a pulley attached to the base, a trough attached to the base, a sled disposed on the trough, a cable connecting the pulley and the sled, the cable connected to an arm capable of being moved at a constant speed, and a system to measure the force required to move the sled is also described. | 10-02-2014 |
20140290331 | WAFER LEVEL CENTRIFUGE FOR MEMS STICTION DETECTION AND SCREENING SYSTEM AND METHOD - A wafer level centrifuge (WLC) system and method of testing MEMS devices using the system. The wafer level centrifuge (WLC) system can include a base centrifuge system and a cassette mounting hub coupled to the base centrifuge system. The method can include applying a smooth and continuous acceleration profile to two or more MEMS wafers via the base centrifuge system. Each of the two or more MEMS wafers can have one or more MEMS devices formed thereon. The two or more MEMS wafers can be provided in two or more wafer holding cassettes configured on the cassette mounting hub. The method can also include identifying one or more target MEMS wafers, which can include identifying stiction in one or more MEMS devices on the one or more MEMS wafers. | 10-02-2014 |
20140311210 | Test Methods and Device for Measuring Transient Resistance to Movement - A device for transient measurement of motion resistance between test substance and one or two test surfaces, comprising a tension/compression force transducer, a speed and/or torque controlled motor with position encoder, rails for mounting a movable sled, method for applying a normal force on the test specimen and computerized data acquisition. The tension/compression force transducer is capable of measuring the transient resistance to motion of the sample mounted to the movable sled in either horizontal direction or in reversible motion oscillatory pull/pull direction at variable frequency and amplitude. The force transducer is capable of precise measurement of the full motion record of the test material from the initiation of motion to the steady state movement. | 10-23-2014 |
20140352403 | CENTRIFUGE MEMS STICTION TEST SYSTEM AND METHOD - A system for testing a device under a high gravitational force including a centrifuge with a rotating member and method of operation thereof. An operating power can be applied to a device, which can be coupled to the rotating member. The system can include a rotational control that can be coupled to the centrifuge. This rotational control can be configured to rotate the rotating member in response to a controlled number of revolutions per time period. The system can also include an analysis device for monitoring one or more signals from the device with respect to the controlled number of revolutions per time period. The analysis device can be configured to determine a stiction force associated with the DUT (Device Under Test) in response to the time-varying gravitational forces and to the one or more signals from the DUTs. | 12-04-2014 |
20150068273 | TRIBOMETER, RHEOMETER, MODULE AND A METHOD FOR TRIBOLOGICAL MEASUREMENTS - A method and a device determine tribological measured values of samples with a rheometer. Wherein the measuring parts of the rheometer are replaced by samples and the surfaces of the samples are moved into frictional contact relative to each other. Accordingly, it is provided that all parts of the rheometer holding the samples in frictional connection and frictional contact or forming the rheometer power circuit, including the spring unit pressing the samples against each other, are regarded as an oscillatory circuit. The oscillation properties of the spring unit are regarded as relevant to the oscillation properties of the oscillatory circuit, and that the oscillation properties of the spring unit are adjusted taking into consideration the resonance oscillations or effects produced by changing, different measurement conditions expected with the respective measurement. | 03-12-2015 |
20150082860 | TESTBENCH DEVICE, IN PARTICULAR TRIBOMETER, FOR PISTON RING / CYLINDER RUNWAY SYSTEMS - A testbench device for the analysis and/or optimisation of tribological properties in a piston ring/cylinder runway system, includes a cylinder segment-holding device for holding a cylinder runway segment as a testpiece, and a piston ring-holding device holding at least one piston ring element and capable of bringing the at least one piston ring element into bearing contact with the cylinder runway segment. An actuation device actuates the cylinder runway segment and/or the piston ring element such that relative displacement with respect to one another takes place in at least one defined direction of space, in particular in the form of an oscillating movement. The piston ring-holding device has a piston having a ring-shaped outer contour and with at least one circumferentially continuous piston ring groove, in which a piston ring is held as a piston ring element. | 03-26-2015 |
20150344037 | METHOD AND DEVICE FOR PREDICTIVE DETERMINATION OF A PARAMETER VALUE OF A SURFACE ON WHICH A VEHICLE CAN DRIVE - A method for predictive determination of a parameter value of a surface on which a vehicle can drive, includes the steps of detecting a total surface that is provided for the vehicle to drive on, determining a partial region within the total surface, on which the vehicle can actually drive, determining the parameter value only for the partial region, and providing the parameter value to at least one driver assistance system of the vehicle. A control device for performing the method is also disclosed. | 12-03-2015 |
20160033361 | RADIAL ROLLING-BEARING TESTING DEVICE - A radial rolling-bearing testing device includes a rotary shaft which an inner ring of a radial rolling bearing is fitted, a rotational driving section which rotates a rotary shaft, a lubricant reservoir which is configured so as to retain lubricant in which a portion of the radial rolling bearing is immersed, and a load applying section which is configured so as to apply a radial load to the radial rolling bearing. A bottom surface of the lubricant reservoir is a curved concave surface which has a partially cylindrical form which is concentric to a central axis of the rotary shaft. An entirety of a housing which supports the rotary shaft may be integrally formed. | 02-04-2016 |
20160061713 | METHOD OF EVALUATING OPERATIONAL FEEL OF SUBSTRATE AND SUBSTRATE - A method of evaluating an operational feel of a substrate includes a step of preparing a substrate having a first surface; a step of measuring a plurality of kinetic friction coefficients μ (μ | 03-03-2016 |
20160069791 | GREEN SPEED METER AND GREEN SPEED METER CONTAINER - The present invention discloses an apparatus for measuring golf putting green speed. The apparatus comprises a body and a head. The body includes a U-shaped channel having rounded sections on sides thereof. Further, the body includes an insert fitting down inside the U-shaped channel and having a hole. The rounded sections and the hole configured for holding a golf ball when the body is in rest position. Further, the head includes a plug and a golf ball lifting handle at one end. The plug allows one end of the body for snugly fitting therein. The golf ball rolls down along the top rails of the U channel and onto a golf putting green when the lifting handle is elevated to a preset angle, and thereby allowing for measuring green speed based on a distance covered by the ball on the golf putting green. Further, a corresponding method and a container for carrying the apparatus are also disclosed. | 03-10-2016 |
20160097708 | DRAG SLED AND METHODS OF USING THE SAME - A drag sled having a sled body defining a curved front end and a lower surface to which tire samples are removable affixed is disclosed, as are methods of employing the drag sled to calculate coefficient of friction and vehicle speeds. In some embodiments, the tire sample is substantially similar to the tire in question. | 04-07-2016 |
20160116395 | FRICTION TESTER - A friction tester is provided which can measure the friction provided by a surface at a slip speed independent to the speed of travel of the friction tester. The friction tester comprises a vehicle which can travel over a surface at a first speed, and a test element which is driven to a second speed, and a measuring device, wherein the second speed is independently controllable; test element is engaged with the surface; and the first and second speeds are different so that the test element slips over the surface with a slip speed. | 04-28-2016 |
20160123866 | METHOD AND SYSTEM FOR ESTIMATING THE POTENTIAL FRICTION BETWEEN A VEHICLE TYRE AND A ROLLING SURFACE - A method and system for estimating the potential friction between a tyre and a rolling surface in which: a first and second engaged-friction/kinematic-quantity reference curve respectively corresponding to a first and to a second reference value μρ | 05-05-2016 |
20160161396 | FRICTION COEFFICIENT MEASURING METHOD OF SURFACE OF SPECIMEN - A method of measuring a friction coefficient of a surface of a specimen includes: obtaining surface information of the specimen by using an atomic force microscope (AFM); calculating data of a friction coefficient of the surface of the specimen by using the surface information of the specimen; and mapping the data of the friction coefficient of the specimen to an image. The method of measuring a friction coefficient of a surface of a specimen may prevent a probe part of an atomic force microscope from being worn out and secure high reliability of the friction coefficient value by correcting the atomic force microscope using a specimen to be actually measured and measuring a fiction coefficient at the same time. | 06-09-2016 |
073010000 | Lubricant testing | 4 |
20080202204 | CHUCK FOR FRICTION TEST APPARATUS - A friction test apparatus includes a base structure and a receptacle secured to the base structure. At least three lower test balls are positioned in the receptacle. The friction test apparatus includes a motor having a rotatable shaft providing powered rotation of the shaft. An upper test ball is positioned on the shaft in a chuck, and contracts the at least three test balls in the receptacle in use. The chuck may include tapered inner surfaces that frictionally engage the upper test ball along a substantially continuous ring of contact to prevent rotation of the upper test ball relative to the chuck during operation. The receptacle may include a fluid inlet and a fluid outlet to permit fluid in the receptacle to be changed. | 08-28-2008 |
20090199617 | Apparatus and methods for management of fluid condition - A method is provided for invoking condition monitoring and predicting parametric equipment and lube condition among a plurality of machines; relying on individual or multiple machine and or lube combinations; comprising establishing a based routine accepting information from multiple sources to simultaneously calculate and compare measured and projected conditions relative to parameters selected to be critical; including multiple condition monitoring techniques like: lube analysis, vibration analysis, thermography, ultrasound and equipment lube monitoring techniques whereas parameters monitored are variables and a specific parametric value represents condition or a group of variables together represents a condition; said variables are not to be confused with attribute data indicating pass/fail without identifying a specific parametric value. The process outputs the specific parameter and days to exceed specified condemning limit for each combination of equipment and lube selected. | 08-13-2009 |
20160053884 | Monitoring and Prognostic System and Method for Determining a Remaining Useful Life of Lubricant in Wet Clutch Transmissions - A system and a method for monitoring a lubricant in a transmission are provided. The system comprises a first speed sensor, a temperature sensor, and a processing unit. The first speed sensor is positioned adjacent a first clutch, which forms a portion of the transmission. The first speed sensor is configured to detect a rotational difference between portions of the first clutch. The temperature sensor is disposed within the transmission. The temperature sensor is configured to measure a temperature of the lubricant. The processing unit is in communication with the first speed sensor and the temperature sensor. In response to information from the first speed sensor and the temperature sensor, the processing unit determines a condition of the lubricant used in the transmission. | 02-25-2016 |
20160061703 | Wear Testing Machine - To simulate various rolling and sliding conditions, a wear testing machine can include a load roller arrangement having at least a first load roller, a second load roller, and a third load roller arranged in a triangular layout. A test roller can be disposed between and in simultaneous contact with the first, second, and third load rollers along at least three points of contact. The load rollers and the test roller can be configured to rotate with respect to each other at a same rotational speed or at different rotational speeds. In an embodiment, the wear testing machine can introduce lubricant to the points of contact between the three load rollers and the test roller. | 03-03-2016 |