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| Number | Title | Issue Date |
| 7921729 | Disconnect sensor A sensor assembly for sensing relative movement between adjacent panels includes a base and first and second arms pivotally mounted to the base. An electrical connecting element is attached to the first and second arms and holds the first and second arms in a first ... | 04/12/2011 |
| 7340961 | Fixture and method for measuring elongation A fixture for measuring the elongation of a specimen includes a base. The base carries a fixture portion, and the fixture portion is provided with a surface adapted to receive a portion of the specimen. ... | 03/11/2008 |
| 7254492 | Method of computing energy loss generated in viscoelastic material and method for evaluating energy loss of golf ball by using method of computing energy loss A method of computing an energy loss generated in a viscoelastic material, including analyzing a dynamic behavior of a to-be-analyzed object composed of the viscoelastic material by a numerical analysis method; and computing the energy loss of the object momently wh... | 08/07/2007 |
| 7206723 | Method of assisting wiring design of wiring structure, its apparatus and its program A method of assisting a wiring design of a wiring structure includes the steps of: regarding the wiring structure constituted by a plurality of pieces of line streak members as an elastic body which has a circular section and in which a plurality of beam elements a ... | 04/17/2007 |
| 7171314 | Methods and systems for analyzing structural test data Systems and methods for analyzing structural test data are disclosed. In one embodiment, a method includes applying a sequence of loads to a test article, receiving raw test data indicative of the applied loads from at least one sensor operatively associated with th... | 01/30/2007 |
| 7066019 | Cavity stability prediction method for wellbores A method of predicting the failure of a rock formation surrounding a subterranean cavity, including a measuring set of parameters relating to pressure conditions and stresses in the rock formation surrounding the cavity; using the set of parameters to determine a ro... | 06/27/2006 |
| 7025141 | Method of increasing the well rate of exploitation and recharge wells The invention includes a method of increasing of the well rate of exploitation and recharge wells, comprising a means of decreasing the stress state in the well area by constructing of slot-like discharge key seats, wherein the slot-like key seats have a screw-like ... | 04/11/2006 |
| 6915244 | Method for predicting an amount of dimensional accuracy defect at the time of press-forming metal sheet A method in which engineers having no experience and technical storage can preliminarily easily and accurately predict an amount of dimensional accuracy defect which occurs at the time of press-forming a metal sheet before press-forming without having expertise such... | 07/05/2005 |
| 6799463 | Method and system for automated fatigue and structural analysis of an element A method, system and computer program product are provided for automated fatigue and structural analysis of a structural element. The method, system and computer program product consolidate and manage the fatigue and structural analysis tools and are responsive to u... | 10/05/2004 |
| 6757642 | Method for performing wedge analysis for assessing wedge instabilities in underground openings A method is provided for performing wedge analysis for assessing wedge occurrence and instability in underground openings, such as mines, caves, and the like. The method scales full-span wedge predictions, accounting for both occurrence and instability potential of ... | 06/29/2004 |
| 6681622 | Device for and method of determining cut resistance of a material A device implements a method of determining a cut resistance of a sample. The device includes a blade wherein the blade and the sample are relatively movable and a first apparatus that transfers energy to at least one of the sample and the blade to cause ... | 01/27/2004 |
| 6546802 | Evaluation method of golf club and golf club Disclosed is an evaluation method of a golf club, where a rear end portion of a club shaft is vibrated in a state where a tip portion of the club shaft is fastened to measure a frequency per unit time, and a golf club using the club shaft is evaluated bas... | 04/15/2003 |
| 6532805 | Micro-material testing apparatus An atomic force microscope including a cantilever, a transferring device and a displacement detecting device is used for conducting a material test of a test member based on a load amount and a displacement amount. The test member may be fixed to the cant... | 03/18/2003 |
| 6170337 | Method and device for measuring permanent length deformations of materials A method for measuring permanent length deformations in materials includes determining a change of an initial distance between two measuring points on the material surface. A first pair of impressions is formed on a portable impression body that correspon... | 01/09/2001 |
| 6000277 | Method for the prediction of rupture in corroded transmission pipes subjected to combined loads A method of predicting rupture failure for corroded transmission pipelines uses a model that accounts for the effects of residual and thermal stresses, and settlement of the pipe following installation. The pressure required for failure under a fixed bend... | 12/14/1999 |
| 5952580 | Apparatus and method for producing shafts having preselected lengths and flexural properties A golf club shaft blank is clamped at its butt end and deformed at its tip end to establish the longitudinal deformation characteristics of the shaft blank. The shaft is repositioned relative to the clamp and then reclamped at a new location which, when d... | 09/14/1999 |
| 5869768 | Material testing device, material testing apparatus and material testing method A material testing device 1 is constituted by a test piece 2, the mechanical properties of which are to be measured and which is connected to the test piece 2, a pair of torsion bars 4 operating as an elastic support portion of the rotary lever 3 and a fr... | 02/09/1999 |
| 5822876 | Surface displacement measurement gauge A gauge for measuring an out-of-plane surface displacement profile around a cold-worked fastener hole in relation to the distribution of residual compressive stresses around the hole and related fatigue life. The gauge has a deformable strain sensor posit... | 10/20/1998 |
| 5739435 | Two-stage strain-sensing device and method A device for detecting deformations in solids includes a casing constructed and arranged to be insertable in a solid. The casing has walls defining a substantially closed container. The container has an inner dividing wall separating the container into an... | 04/14/1998 |
| 5731523 | Hose fatigue indicator A hose fatigue indicator including a hose fitting defining an opening. A fracturable diaphragm is positioned adjacent the opening. The diaphragm is in communication with fluid flowing through the fitting. The diaphragm fractures upon exceeding a predeterm... | 03/24/1998 |
| 5585555 | Borehole strainmeter A recoverable, multiple position borehole strainmeter is provided. The strainmeter includes at least two anchors having pistons for releasably engaging the borehole whereby to mount the strainmeter in the borehole. A pneumatic actuator for controllably, i... | 12/17/1996 |
| 5576485 | Single fracture method and apparatus for simultaneous measurement of in-situ earthen stress state and material properties A method and apparatus for measuring ambient stress states and material properties in underground media includes a borehole probe having a cylindrical tube formed of soft, elastic polymer material secured about a central mandrel. An upper end cap assembly... | 11/19/1996 |
| 5563458 | Apparatus and method for sensing surface flexure Apparatus for sensing the flexure of a surface includes an array of bistable dome shaped switches within the surface which change their state or position depending on the direction and degree of local flexure of the surface. A flexible sheet parallel to t... | 10/08/1996 |
| 5540101 | Borehole directional dilatometer A device positionable in a borehole for determining rock mass deformability, comprises a generally cylindrical body having at least one pair of diametrically opposed, elongated expandable wall portions for pressure contact engagement with the borehole wal... | 07/30/1996 |
| 5402366 | Method and apparatus for simulating a mechanical operation A method and apparatus for simulating a mechanical operation is based on the finite element method and uses a particle flow model. Evaluation of contact boundary between a die and a material and remeshing operation are unnecessary. Particles (6) are moved... | 03/28/1995 |
| 5381690 | Method and apparatus for measuring three dimensional stress in rock surrounding a borehole A method for measuring the three dimensional stress in rock surrounding a borehole comprises the steps of cutting slots into the wall of a borehole at different angles relative to the borehole axis so as to effect stress relaxation and strain deformations... | 01/17/1995 |
| 5050690 | In-situ stress measurement method and device A method for obtaining in-situ stress measurements in a well is accomplished by installing a membrane packer on a drill string. The packer membrane is attached near the drilling tool and is capable of being radially expanded by fluid pressure to abut agai... | 09/24/1991 |
| 4914591 | Method of determining rock compressive strength A method is disclosed for determining rock compressive strength of a subterranean formation penetrated by a wellbore. A mathematical model of a drill bit and an estimate of rock ductility of a particular subterranean formation in conjunction with weight-o... | 04/03/1990 |
| 4823608 | Method of measuring residual stress in a carrier produced in manufacturing of a belt for continuously variable transmission An endless metal carrier is bent and treated by a heat treatment process to provide residual stress. The product carrier is cut at a portion, and the radius of the cut carrier in the free state is compared with a standard radius of a standard carrier havi... | 04/25/1989 |
| 4823607 | Released film structures and method of measuring film properties Released film structures are employed in measuring the mechanical properties of the film material. By measuring the deformation of thin film structures held under intrinsic tensile stress and then released, these mechanical properties can be accurately me... | 04/25/1989 |
| 4813278 | Method of determining three-dimensional tectonic stresses A complete, three-dimensional stress state of underground rock is determined by a method which includes the steps of: drilling a rock to form a borehole with a substantially spherical bottom; deforming the borehole either by releasing the rock from the st... | 03/21/1989 |
| 4680897 | Method for machining holes in composite materials A method for boring well-defined holes in a composite material such as graphite/epoxy. A slurry of silicon carbide powder and water is projected onto a work area of the composite material in which a hole is to be bored with a conventional drill bit. The s... | 07/21/1987 |
| 4673890 | Well bore measurement tool A caliper is mounted on two springs in a free-floating manner between interlockable upper and lower packers to be set in a well bore. The caliper has radially extendible arms which are extendible in response to independent forces exerted thereon as derive... | 06/16/1987 |
| 4599904 | Method for determining borehole stress from MWD parameter and caliper measurements The present invention is directed to a method for determining the stress at the borehole boundary at a selected location within a borehole. The present invention comprises a method for determining the stress employing a plurality of mechanical properties ... | 07/15/1986 |
| 4510799 | Method of measuring material properties of rock in the wall of a borehole To measure the modulus of elasticity of the rock in the wall of a borehole, a plug is cut in the borehole wall. The plug, its base attached to the surrounding rock, acts as a short column in response to applied forces. A loading piston is applied to the t... | 04/16/1985 |
| 4491022 | Cone-shaped coring for determining the in situ state of stress in rock masses The state of stress in a rock mass surrounding a borehole (21) can be estimated by measuring the initial dimensions of the borehole, cutting a cone-shaped opening extending outwardly from the borehole having a bottom wall (44), and cutting a conical slot ... | 01/01/1985 |
| 4461171 | Method and apparatus for determining the in situ deformability of rock masses Measurements of the deformability of deep rock masses are made by positioning a borehole jack (20) having opposed bearing plates (22, 24) in a borehole at a position at which measurements are to be made, and driving the pressure plates (22, 24) apart to d... | 07/24/1984 |
| 4249423 | Semi-nondestructive residual stress measurement Residual stress measurements are made using a strain gage and stress relief achieved by local melting of a region of the object being tested by a laser beam or other finely directed heat source. Surface strain is measured dynamically before the heat of th... | 02/10/1981 |
| 4248094 | Measurement of residual stresses by local melting Residual stress measurements are made using a strain gage and stress relief achieved by local melting of a region of the object being tested by a laser beam or other focused heat source. Surface strain is measured after the molten region resolidifies, and... | 02/03/1981 |
| 4155264 | Method of determining internal stresses in structural members Method for determining internal stresses in structural members in machine or apparatus manufacturing by machining, around a measuring location provided with strain gages, a circular slot into the surface of the structural member that is to be measured, me... | 05/22/1979 |
