Prestressed Specimen Patents (Class 73/785)
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Patent number: 11733134Abstract: A sample preparation mould and a sample preparation method for the triaxial test of MSW are provided. In the present invention, the cylindrical main mould comprises two curved steel pieces, and the two sides of each curved steel piece have a stretched connection part; the two curved steel pieces are connected with each other and clamped by two steel clamps; porous stones are arranged at two ends of the cylindrical main mould and fixed separately by a top limiting lantern ring and a bottom lantern ring; the top limiting lantern ring is detachably connected to the top hopper, from which MSW materials are input; the cylindrical main mould is radially constrained in four positions, and the two ends thereof are axially constrained, thereby significantly improving stability during compacting and hence ensuring the axial and radial sizes of the MSW sample.Type: GrantFiled: February 21, 2021Date of Patent: August 22, 2023Assignee: Zhejiang Sci-Tech UniversityInventors: Zhenying Zhang, Guoyang Fan, Jiayue Zhang, Jiahe Zhang, Qiaona Wang, Bang Wang, Min Wang
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Patent number: 10641692Abstract: An apparatus for measuring a degree of cure and a specific volume of a packaging material is provided, including: an upper load module configured for driving the rotation of an upper ball screw via an upper servo motor such that a force plate coupled to the upper ball screw moves downward and is thus positioned; a lower load module having a lower ball screw operating and moving via a lower servo motor such that a load joint group connected to the lower ball screw generates a corresponding displacement; an upper film cavity module connected to the upper load module; and a lower film cavity module disposed on the lower load module. The displacement of the load joint group enables a push rod to move upward. A heating pipe keeps constant the temperature of a subject to be measured in a cavity of the lower film cavity module.Type: GrantFiled: January 12, 2018Date of Patent: May 5, 2020Assignee: U-CAN DYNATEX INC.Inventor: Sheng-Jye Hwang
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Patent number: 10589484Abstract: The invention relates to a press drive for a press or a press having a press drive. The invention also relates to a method for controlling the press drive by means of a control unit. The press drive is used for moving a ram of the press in a stroke direction H between an upper return point OT and a lower return point UT. It comprises a knee lever gear having a first lever and a second lever. A connecting rod engages on the knee lever of the two levers and is connected on the other end to an eccentric of an eccentric drive. The control unit can drive the eccentric drive in a first operating mode B1 or a second operating mode B2 or, in particular, also a third operating mode B3. In the first and the second operating modes B1, B2, the eccentric oscillates in a respectively different angle region W1, W2 about a rotation axis D of the eccentric drive, thus resulting in different force and movement states of the ram in both operating modes.Type: GrantFiled: September 22, 2014Date of Patent: March 17, 2020Assignee: SCHULER PRESSEN GMBHInventors: Rainer Hedler, Marcus Kosse, Joachim Beyer
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Patent number: 10060901Abstract: A concrete temperature stress testing machine system and a testing method are provided, in which the concrete temperature stress testing machine system includes: a concrete temperature stress testing machine and a walk-in environment simulation laboratory system; and the concrete temperature stress testing machine includes a testing machine host and a concrete test specimen area. The testing machine host includes a rear fixed end, a front fixed end, and a pair of steel shafts connected between the rear fixed end and the front fixed end. The concrete test specimen area includes a moveable cross-head, a fixed cross-head, and a left side formwork, a bottom formwork and a right formwork connected between the moveable cross-head and the fixed cross-head.Type: GrantFiled: December 27, 2017Date of Patent: August 28, 2018Assignees: TSINGHUA UNIVERSITY, CHANGCHUN CITY CHAOYANG TEST INSTRUMENTS CO., LTD.Inventors: Yu Hu, Qingbin Li, He Zhu, Ge Wang
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Patent number: 9744975Abstract: An apparatus transforms vehicle operator intentions to wheel propulsion controls using an operator interface, sensors, a torque budgeting circuit, at least four motor controllers, and a vehicle/operator personality profile store. The store provides instructions and parameters which control dynamic vehicle responsiveness and reflect an operator's personality. The instructions and parameters are accessible by an application programming interface (API). Vehicle characteristics may be recorded by operating the vehicle through a prescribed route or evolution. A revised performance profile of a vehicle can be installed when the vehicle is reconfigured. Performance of a vehicle is modified to mimic a different vehicle by installing a new software dynamic performance profile. The API enables an open architecture for developers to customize vehicle dynamics without cutting metal.Type: GrantFiled: March 10, 2015Date of Patent: August 29, 2017Assignee: R MOTOR COMPANYInventors: Dean Drako, Shivinder Singh Sikand
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Publication number: 20140338463Abstract: A method of analysing a load bearing member (12), comprises providing the load bearing member in a condition in which it is secured to a formation with a securing assembly (14). A predetermined load is applied to the load bearing member, thereby stressing the securing assembly. A signal is transmitted through a component (24, 108) of the securing assembly transverse to the direction at which the load is applied, and a measurement is taken of an effect on the signal to determine the aforesaid load.Type: ApplicationFiled: September 17, 2012Publication date: November 20, 2014Applicant: Strainsonics LimitedInventors: Peter Seaman, Philip Brian Harper
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Publication number: 20140298917Abstract: The invention relates mainly to a test bench (10) for a radial bearing (14) suitable for being interposed between two members (12, 16) that are movable relative to each other in rotation, the test bench being characterized in that it comprises a radial force measurement device (18) for measuring radial forces exerted on said bearing (14), a radial acceleration measurement device (20) for measuring radial accelerations to which said bearing (14) is subjected, and an electronic calculation unit (26) in communication with the radial force measurement device (18) and with the radial acceleration measurement device (20). The invention also relates to a method of establishing a behavior relationship for the radial bearing (14).Type: ApplicationFiled: April 4, 2014Publication date: October 9, 2014Applicants: CENTRE NATIONAL D'ETUDES SPATIALES CNES, SNECMAInventors: Philippe NIVET, Fabien Tessier, Laurent Fabbri, Valerie Begin
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Patent number: 8800380Abstract: A tension monitoring assembly or device permanently installed between a connection or anchor point and a guy cable line or structural rod allows constant monitoring and increase confidence that the guy cable or structural tension rod remains tensioned to the proper value. The device includes a plurality of compression members and a connecting member that are arranged between connection points such that the tension between a first connecting point and a second connection point may be set to a selected value. The tension on the device is determined by the distance between two members of the device such that a change in the tension from a set amount will result in a change of the distance between the two members. This change in distance can be determined by indicia that are visible as the two members move with respect to each other.Type: GrantFiled: March 27, 2012Date of Patent: August 12, 2014Assignee: Tomcat USA, Inc.Inventor: Harry William Todd, IV
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Patent number: 8683871Abstract: A process for manufacturing a laminated glazing, in which a lamination interlayer is interposed between two substrates having a glass function, including: making a measurement of Young's modulus E on a sample of the interlayer, using a viscoanalyzer, by varying temperature and frequency while imposing a constant dynamic displacement; making a numerical treatment of curves obtained, using WLF (Williams-Landel-Ferry) equations, to establish a law E(f) governing behavior of a material constituting the interlayer sample at a given temperature; producing a numerical model based on a finite-element method in bending of a laminated glazing panel, wherein mechanical properties of the sample result from the preceding operations; comparing results of the numerical calculation with those obtained with analytical formulae in which participation of the interlayer in transferring shear in the laminated glazing is represented by a transfer coefficient ?; varying the transfer coefficient ? in the analytical formulae until reType: GrantFiled: September 30, 2009Date of Patent: April 1, 2014Assignee: Saint-Gobain Glass FranceInventors: Romain Decourcelle, Fabien Levasseur, Jean-Clement Nugue
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Publication number: 20140076060Abstract: The remaining serviceable life of a component of a gas turbine engine can be predicted by monitoring one or more topographical features of the component which are arranged so as to cause a non-hazardous crack to be initiated at one or more of the topographical features during the course of operation of the gas turbine engine.Type: ApplicationFiled: August 7, 2013Publication date: March 20, 2014Applicant: ROLLS-ROYCE PLCInventor: Quentin Luc BALANDIER
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Publication number: 20130286138Abstract: A ribbon includes a substrate film, wherein the film comprises a tensionable material; and an ink disposed on the ribbon. A length of the ribbon includes portions that have been tensioned to provide a code readable from the ribbon by measuring the tension over the length of the ribbon.Type: ApplicationFiled: January 17, 2012Publication date: October 31, 2013Applicant: VIDEOJET TECHNOLOGIES INC.Inventors: Martin McNestry, Gary Pfeffer
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Patent number: 8429960Abstract: The invention relates to a structure and a process for measuring an energy of adhesion between two substrates bonded in a transverse direction. The method involves providing for at least one of the two substrates to have a plurality of elementary test cells within a test layer each being capable of locally applying, in the transverse direction, a preset mechanical stress (?), dependent on the temperature (T), to a bond interface between the substrates in a direction tending to separate them, applying a test temperature to the substrates and identifying debonded regions of the bond interface so that the local adhesion energy at the test temperature in the regions may be deduced therefrom, the local adhesion energy in a region of the bond interface being deduced from the stress applied by the test cells that caused debonding in the region.Type: GrantFiled: October 22, 2010Date of Patent: April 30, 2013Assignee: SoitecInventor: Didier Landru
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Patent number: 7519481Abstract: A method and system for selecting fluids for compatibility with specified metals exposed to oil field environments. Metal specimens are tested for corrosion and/or cracking behavior by exposing them to fluids under stressful test conditions. The testing is conducted under variable temperature, pressure, pH, fluid density, metallurgical stress, additives, cover gases and combinations thereof. The results from the stress testing are stored in a database. The test results are evaluated using encoded logic embedded in software media. Fluid compatibility evaluation software, developed from the stress test results, is executed to determine the cracking susceptibility of metals exposed to fluids under stressful conditions. A cracking susceptibility index can be developed to provide a quantitative indicator of cracking susceptibility. Fluid recommendation reports utilize the cracking susceptibility index values to rank compatible fluids. The reports also list optional additives to be used with the fluids.Type: GrantFiled: September 11, 2006Date of Patent: April 14, 2009Inventors: Glenn Perrin, Jeffrey McKennis, Thomas S. Carter, Surendra K. Mishra
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Patent number: 6513389Abstract: Techniques for evaluating curvatures in line features embedded in a different material layer formed on a substrate. A model based a uniform layer formed over a substrate may be used to represent a structure with parallel line features embedded in a layer formed over the substrate. The curvatures of the uniform layer due to an elastic distortion along a first direction substantially parallel to the line features and along a second direction orthogonal to the first direction are determined. Next, the curvatures of the uniform layer may be used as respective curvatures of each of the line features.Type: GrantFiled: April 25, 2001Date of Patent: February 4, 2003Assignee: California Institute of TechnologyInventors: Subra Suresh, Tae-Soon Park
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Patent number: 6371698Abstract: A structural pier assembly includes a cementitious pier and pressurized grout contained beneath the pier in the shaft so as to exert an upward force on the pier. An enclosure, such as a bladder or bellows, is filled with grout from a reservoir via a conduit which preferably extends axially along the length of the pier and is left in place after the grout hardens. A pressure gauge measures the pressure of the grout within the enclosure, permitting the direct measurement of end bearing and side bearing capacities of the resulting pier assembly. The load bearing capacity of the pier is enhanced by the pressurized grout, and is preferably at least twice the end bearing capacity of an unpressurized pier.Type: GrantFiled: November 8, 1999Date of Patent: April 16, 2002Assignee: A. H. Beck Foundation Company, Inc.Inventors: August H. Beck, III, Philip G. King
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Patent number: 5699274Abstract: The invention is a performance testing system, i.e., performance of a material under a load concentrated in a single area. The system is computerized and automatically applies a load to a panel to be tested, reads and records deflection of the panel without operator involvement, and provides a printed test report.Type: GrantFiled: November 16, 1995Date of Patent: December 16, 1997Assignee: Timberco, Inc.Inventor: Edward J. Starostovic, Jr.
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Patent number: 5589640Abstract: In a boiling water reactor having a core shroud disposed within a reactor vessel and a plurality of tie rods installed between vertically spaced sites on the core shroud as part of a core shroud repair, a method of measuring tie rod preload after installation includes the steps of lowering a tool into the reactor vessel from a remote location positioned externally of the reactor vessel, attaching the tool to an upper portion of a tie rod, using the tool to apply a tensile load along a longitudinal axis of the tie rod, measuring the tensile load applied to the tie rod, measuring axial displacement of the tie rod in response to the applied tensile load, plotting the applied load versus the axial displacement measured, and identifying a change in slope on the load-displacement plot occurring at a load corresponding to the tie rod preload.Type: GrantFiled: April 3, 1996Date of Patent: December 31, 1996Inventor: Patrick J. Butler
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Patent number: 5569857Abstract: The present invention is intended to provide a stress detecting and measuring method wherein in order to measure a shearing strain alone associated with a stress acting in an intended direction, the stress being one of the stresses acting on an axle of a vehicle or a structure having a fixed support point adjacent the axle, the conditions for the optimum position where a stress sensor is to be mounted are indicated. Further, the invention is intended to provide a stress detecting device which accurately measures a shearing strain alone associated with a stress acting in an intended direction by further separating a plurality of stresses acting on a stress sensor. For example, in the case where stresses are applied in two directions to a structure having a fixed support point, in order to measure a shearing strain alone associated with a stress acting in an intended direction, a stress sensor should be mounted in a position which is a transformation knot zone for the other stress strain, i.e.Type: GrantFiled: January 13, 1995Date of Patent: October 29, 1996Assignee: Japan Electronics Industry, LimitedInventor: Nagao Miyazaki
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Patent number: 5520057Abstract: The present invention has an object of simply and accurately measuring a load applied to a mechanical press. A test billet obtained from material of which the mechanical strength is uniform and which is finished precisely is placed on the press and pressed between a slide and a bed of a press, whereby an upsetting amount and a pressure at that time of pressing the billet are measured by a load cell. As a result, a press load, which may be calculated by establishing as functions such elements as material, deformation amount, and working speed of a test billet, can be accurately obtained by a simple measurement of the test billet to which established properties have preliminarily been given.Type: GrantFiled: September 22, 1995Date of Patent: May 28, 1996Assignee: Kurimoto, Ltd.Inventor: Masatoshi Nakamura
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Patent number: 5292481Abstract: A crack propagation test specimen has a base metal and a clad metal. The base metal has an upper surface and a bottom surface with a hole extending from the bottom surface toward the upper surface. The cladding metal is supported on the upper surface of the base metal and has a first slot cut therethrough which is in fluid flow communication with the hole in the base metal. A second slot is cut in the cladding metal adjacent to the first slot for receiving a wedge. The first slot and the second slot define a wall which closes over the first slot when a wedge is forced into the second slot to simulate a hairline crack. A mechanically deformed metal sample is disposed in the hole in the base metal to simulate a stressed base metal supporting a cladding metal subject to hairline cracking.Type: GrantFiled: February 8, 1993Date of Patent: March 8, 1994Assignee: Westinghouse Electric Corp.Inventors: Robert G. Aspden, Thomas G. Bengel
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Patent number: 4257265Abstract: Two radial cuts are made in a disc-shaped solid, the wedge (or sector) thereby produced is removed, and the exposed faces of the radial cuts are forced into contact with each other. By bonding (or welding) together the faces of the radial cuts, a self-stressed disc, capable of propagating a pure mode 1 crack, is created.Type: GrantFiled: September 19, 1979Date of Patent: March 24, 1981Assignee: The United States of America as represented by the Secretary of the Air ForceInventor: Kenneth H. G. Ashbee
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Patent number: 4199994Abstract: An erect cylindrical pressure vessel, especially for a nuclear reactor, is constituted from cast-iron or cast-steel elements and is stressed by axially extending angularly spaced axial stressing elements and by axially circumferential peripheral stressing elements or cables. At least one of the axially stressing cables and at least one of the peripheral stressing cables serving for sustaining the operating load of the pressure vessel, i.e. the working elements rather than the addition or additional elements, is provided with a measuring device which triggers an alarm upon the detection of a change in the force developed at the respective stressing element or the length change thereof reaching 90% of the corresponding change at the pressure rating of the vessel.Type: GrantFiled: June 15, 1978Date of Patent: April 29, 1980Assignee: Siempelkamp Giesserei GmbH & Co.Inventors: Burkhard Beine, Hermann Ostendorf, Gunter Schmidt