Did You Know...
...that Charles Goodyear performed some of his experiments on rubber while in debtor's prison? He was there so often he referred to it as his "hotel". Chronically in debt because of poor business sense and ill health, Goodyear depended on the generosity of friends and family. Even after he unlocked the secret to vulcanizing rubber, he was unable to improve his financial situation. When he died, his estate was $200,000 in debt.
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| Number | Title | Issue Date |
| 7363822 | Technique for applying direct resistance heating current to a specific location in a specimen under test while substantially reducing thermal gradients in the specimen gauge length A technique for imparting direct resistance heating to a gauge length of a conductive metallic specimen under test and which can be used to add an independent dynamic thermal capability to a mechanical material test system. Specifically, a pair of, e.g., conductive ... | 04/29/2008 |
| 7316158 | Test stand with tipping device for motor vehicles A test stand for motor vehicles, having a tipping device. The tipping device has a lower frame unit (13) and an upper frame unit (6) that can be tipped relative to the lower frame unit. The tipping device is further provided with four lifting units ( | 01/08/2008 |
| 7311010 | Gauge restraint measurement system A direct measuring loaded gage axle assembly that measures track strength by directly measuring constant load on split axles as vertical loads are imposed by a hydraulic ram, and horizontal loads being supplied by horizontal rams through split axles and steel wheels... | 12/25/2007 |
| 7246527 | E-fixture A device and a method are disclosed for testing a curved panel assembly, which simulates a segment of an aircraft fuselage barrel section, subjected to combined loading. The device includes an axial load head assembly attached to the test panel assembly via one axia... | 07/24/2007 |
| 7146859 | Method for simulation of the life of a vehicle In a method for simulation and assessment of the life or dynamic strength of components of a vehicle, the vehicle is subdivided into individual components and these components are modeled by means of a finite element method. The finite element models of the individu... | 12/12/2006 |
| 7137306 | Apparatus for providing enhanced self-resistive specimen heating in dynamic material testing systems and accompanying method for use therein Apparatus and an accompanying method for use in a conventional dynamic material testing system to advantageously provide enhanced self-resistive specimen heating. Specifically, a fixture (400) is added to the system. The fixture has two supporting arms (20... | 11/21/2006 |
| 7107857 | Apparatus for an anvil system that provides enhanced self-resistive specimen heating when used in a dynamic thermo-mechanical material testing system Apparatus for use in a conventional dynamic material testing system to advantageously provide uniform self-resistive specimen heating with enhanced temperature uniformity. Specifically, an anvil stack (300) in an anvil assembly (200) has a foil interfa... | 09/19/2006 |
| 7089802 | Method and apparatus for determining hydrogen embrittlement A method and apparatus for determining failure of a test component. The apparatus, according to a selected method, is able to determine the embrittlement potential of a selected procedure for a selected material. The apparatus is able to determine the embrittlement ... | 08/15/2006 |
| 6834551 | Hydraulic servo-type material testing apparatus An adjusting unit in a feedback loop for controlling a hydraulically operated-type load mechanism consists of two portions both adapted to effect proportional action and derivative action. Weights are applied to these two portions independently. Hence, an output y c... | 12/28/2004 |
| 6826963 | Panel testing apparatus A panel testing apparatus is used to test the panel of a mainframe. When the panel is to be opened, the panel separates from the mainframe after the opening apparatus touches the switch. The fastening apparatus can clamp the front side of the panel easily because th... | 12/07/2004 |
| 6718833 | Multiaxial high cycle fatigue test system A multiaxial high cycle fatigue test system for testing bending, torsion, and tension of a test unit, comprises servo-hydraulic components, including a hydraulic service manifold, two small high frequency actuators along a first axis, and one large main actuator alo... | 04/13/2004 |
| 6457369 | Loading assembly having a soft actuator A loading assembly for applying a load to a test specimen includes a container having a volume of compressible fluid for providing a spring. A cylinder having a bore operably connected to the container. A piston is slidable in the bore and is operably cou... | 10/01/2002 |
| 6453750 | Stress testing apparatus A stress testing apparatus includes a cylinder block 2 with twelve cylinders 4, each housing a piston 14. Hydraulic pressure is provided to each of the cylinders 4 by a common supply bore 6 for urging each piston 14 out of its respective cylinder 4. A str... | 09/24/2002 |
| 6247358 | Method for the evaluation of shale reactivity Shale reactivity is evaluated by testing a preserved test plug of shale sample in a triaxial test machine, the test plug being prepared by collecting a downhole shale sample and keeping it all times immersed in a preserving mineral oil so as to avoid dehy... | 06/19/2001 |
| 6247370 | Two dimensional stress relaxation testing device The present invention relates to a two dimensional stress relaxation testing device in which a plus shaped sample is stretched in mutually perpendicular directions simultaneously to monitor the stress and also the relaxation process of any sheet material ... | 06/19/2001 |
| 6089101 | Material testing machine including a control system for feedback-controlling the operation of a servo system A material testing machine includes a control system for feedback-controlling, during material testing, the operation of a servo system including an actuator for applying a load to a test piece. During the mounting of the test piece to the testing machine... | 07/18/2000 |
| 5959215 | Heat build-up/fatigue measuring method for viscoelastic body and hydraulic servo flexometer The major object of this invention is to provide a heat build-up/fatigue measuring method for a viscoelastic body and a hydraulic servo flexometer, that enable direct measurement of a strain (displacement) and a stress (load) applied to a test piece and r... | 09/28/1999 |
| 5641912 | Method for remote application of variable load and/or displacement to specimens, components, or systems A method and apparatus for applying a force, displacement, or both to specimens, components, or systems by using a remote variable load/deflection device. The method enables testing of materials under actual in-service conditions. A displaceable container... | 06/24/1997 |
| 5487301 | Test rig and process for testing motor vehicle assemblies, in particular independent wheel suspension A test rig for testing motor-vehicle assemblies includes a loading device for inducing vertical forces, lateral forces, longitudinal forces and braking or driving forces in the motor-vehicle assembly. The test rig includes a control device for controlling... | 01/30/1996 |
| 5437191 | Hydraulically powered test frame with spindle-actuated valve A test frame has an upper end traverse, a lower end traverse below the upper end traverse, a pair of parallel upright tie rods having upper ends fixed in the upper traverse and lower ends fixed in the lower traverse, and a middle traverse between the uppe... | 08/01/1995 |
| 5424634 | Non-destructive flex testing method and means Describes a process for applying non-destructive cyclical mechanical stress to planar items in order to simulate the effects of cyclical thermal stresses. Latent defects are accelerated and screened early in a manufacturing process.... | 06/13/1995 |
| 5062303 | Encapsulated actuator for testing of specimens An encapsulated actuator for testing specimens includes a housing contain a wall defining first and second chambers. The specimen under test is arranged in one of the chambers and vent holes are provided in the wall in order to equalize the pressure with... | 11/05/1991 |
| 5025669 | Device for carrying out stress tests on rock sample and other materials Device for carrying out tests on materials such as rock samples for example, on which triaxial stresses are exerted. The device comprises an extended body with a central cavity where a first part (6) of a sonic sonde, a sole piece (9) carrying a cubic sample (... | 06/25/1991 |
| 5024102 | Device for testing trailer couplings under loading conditions resembling those occurring in use, preferably with inclusion of the construction for fixing the trailer coupling The invention provides a device for testing trailer couplings which transmit a traction to a trailer by way of a trailer coupling ring on the drawbar of the trailer, the test being carried out under loading conditions similar to those occurring in practic... | 06/18/1991 |
| 4884455 | Method for analysis of failure of material employing imaging Methods are provided for determining mechanical and petrophysical properties (density, porosity, bulk compressibility, Young's modulus, Poisson's Ratio) of a material undergoing mechanical deformation studies with an imaging (CT, NMR) apparatus. The metho... | 12/05/1989 |
| 4856341 | Apparatus for analysis of failure of material Apparatus is provided for performing mechanical deformation studies of a sample of material to determine mechanical and petrophysical properties of such a sample. The apparatus is useful in conjunction with an imaging (NMR or CAT) apparatus.... | 08/15/1989 |
| 4679441 | Pressure balanced loading piston for triaxial test cells A triaxial test cell and pressure balanced piston therefor that includes a housing containing a vessel wherein a test specimen is located, immerged in a confining fluid. The housing includes a passage wherein the piston is installed to slide so as to move... | 07/14/1987 |
| 4658656 | Multiple axis test machine reproducing road excited vehicle vibration A testing machine reproduces road excited vibrations for the purposes of testing vehicle wheel support specimens, for example McPherson strut assemblies used in front wheel drive vehicles, the system permits force inputs of horizontal, steering, vertical,... | 04/21/1987 |
| 4475403 | Device to preload loading connections A device to permit easily preloading a grip used in specimen testing by providing load carrying links and means for stressing the links to a load level higher than that encountered during the normal loading of the grip, and providing mechanical compressiv... | 10/09/1984 |
| 4263809 | Tetraxial vehicle test fixture A test system for testing axles and wheel spindles directly in place on vehicles such as automobiles, which simplifies the loading to obtain the necessary information for testing axles and spindles using two sets of actuators, each set comprising a pair o... | 04/28/1981 |
| 4009606 | Device for the study of materials subjected to alternate tensile and compressive tests A device for subjecting n (n ࣙ 1) test specimens to alternate tensile and compressive stresses comprises an excitation source having a horizontal axis of displacement and a guide rod which is capable of free translational displacement along a horizontal... | 03/01/1977 |
| 3994158 | Hydraulically operated workpiece testing machine Two stationary uprights are mounted on a support and each of them carries a piston. Each upright is surrounded by a vertically movable cylinder whose interior is subdivided by the respective piston with an upper and a lower chamber. Fluid passages are for... | 11/30/1976 |
| 3992928 | Measuring the strength of a rock formation in situ Two hollow cylinders of rock are formed in the rock formation to be tested. A pressure ring is applied to the interior of one of the hollow cylinders of rock, and the ring is pressurized until the cylinder fractures, the highest value of the pressure bein... | 11/23/1976 |
