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| Number | Title | Issue Date |
| 7430922 | Sensor device for indicating wear states on contact bodies The invention relates to a sensor device for indicating wear states on contact bodies of pantographs of electrically driven vehicles, said contact bodies being fixed to metallic supports. The aim of the invention is to provide a sensor device that permits, at practi... | 10/07/2008 |
| 7347105 | Method for the analysis of a test specimen of reducible material that contains iron A method for the analysis of the properties of a test specimen comprises: arranging a test specimen between contact surfaces; continuously reducing the distance between the contact surfaces; measuring the diameter of the test specimen when the test specimen makes co... | 03/25/2008 |
| 7347104 | Arrangement and method for the analysis of the strength of a specimen of reducible material that contains iron A method for the analysis of the strength of a test specimen of reducible material that contains iron during the use of an arrangement comprises: a) arranging a test specimen between adjacent contact surfaces of first and second devices of the arrangement; b) contin... | 03/25/2008 |
| 7320242 | Tensile impact apparatus The present invention generally relates to a tensile impact apparatus that is designed to give dynamic stress-strain curves and fracture characteristics for a rubber specimen undergoing tensile impact loading. More particularly, this invention relates to a tensile i... | 01/22/2008 |
| 7024323 | Control system for a failure mode testing system A control system for a failure mode testing system is described. The control system employs at least one control algorithm that enables the testing system to be operated at optimal pressure and frequency levels in order to generate a desired system response, such as... | 04/04/2006 |
| 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 |
| 6457370 | Method and device for measuring working force of mechanical press Pressurized oil is charged into a hydraulic chamber (12) formed within a slide (3) of a mechanical press (1). relationship between a working force (F) during a press working and a pressure (P) of the pressurized oil is preliminarily measured for every pre... | 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 |
| 6370970 | Cargo handling machine including force control The present invention aims at improving operability of a cargo handling machine by applying thereto a force control method. According to the force control method, a force sensor detects an anti-gravitational lift force that makes it possible to raise the ... | 04/16/2002 |
| 6324906 | Double chamber container for metering liquid flow The container includes a first chamber connected to the liquid source through an inlet port of a given cross-sectional area and a second chamber connected to a drain through an outlet port of at least equal size. The chambers are separated by a partition ... | 12/04/2001 |
| 5700951 | Testing apparatus of steering system A testing apparatus of a steering system is provided to correctly detect load in a direction in which steering reaction force acts, the load being applied to the steering system. A tie rod connected to a rack of the steering system is connected to a steer... | 12/23/1997 |
| 5585570 | Rising step-load test apparatus A rising step-load test apparatus for subjecting the notched region of a fracture specimen to tension by applying four-point bending to the specimen, and having an adaptor that can fit into the test apparatus in four-point bending and convert the bending ... | 12/17/1996 |
| 5576494 | Method and apparatus for subterranean load-cell testing A method and apparatus for testing the load-bearing capacity of a subterranean formation surrounding a concrete shaft and is made up of an expansion chamber at the bottom of the hole containing the shaft and fluid pressure and return lines which extend do... | 11/19/1996 |
| 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 |
| 5425276 | Material testing system providing simultaneous force loads A material test system capable of applying multiple force load components simultaneously includes a first actuator connected in parallel with a spring element. The first actuator and the spring element in turn are connected in series with the test specime... | 06/20/1995 |
| 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 |
| 5379645 | Test cell for applying directionally variable three dimensional stress fields to a test specimen The present invention relates to a test cell 1 suitable for use in applying directionally variable three dimensional stress fields to cylindrical test specimens 6 normally obtained by conventional coring techniques used for sample recovery. The test cell ... | 01/10/1995 |
| 4802365 | Multi-axial fatigue testing machine A machine for testing ball joints, elastomer bushings or other parts has a pair of mutually rotated gimbals attached to the outer shell or element for applying rotational displacements about two axes and a linear input attached to the inner element to app... | 02/07/1989 |
| 4297892 | Process and apparatus for the measurement of the anisotropy value of form changes in normal direction in sheet metals The invention concerns a process and an apparatus for measuring the anisotropy value of form changes in normal direction in sheet metals (the r-value). In course of a standard tensile test, the longitudinal change of dimension of the test piece is measure... | 11/03/1981 |
| 4136557 | Panty hose testing apparatus and method A panty hose testing apparatus in which a manikin conforming substantially to the lower portion of a human torso is provided with waist, leg, and hip portions for receiving thereon panty hose garments and the like. The garment is retained upon the manikin... | 01/30/1979 |
| 4109516 | Cam plastometer A cam plastometer in which deformation compressive forces are applied to a specimen by a cam follower engaging a cam which is rotated by a hydraulic motor. By rotating the motor at a predetermined speed, and employing a particular profile of the cam perip... | 08/29/1978 |
| 4099407 | Method for measuring the pre-stress in hoop-bound anuluses of rectangular cross-section and made of piezoelectric ceramic material A static stress and a sinusoidal dynamic stress are applied to the internal urface of the anulus. The electric voltage between the internal surface and the external surface of the anulus is measured for each value of the static stress. The static stress at... | 07/11/1978 |
| 4096742 | Flexing device for testing resilient articles and method of compression testing A method of compression testing resilient articles comprising the steps of cutting a sample to desired predetermined dimensions, placing the sample in a preflexing machine to provide preflexing at test specifications, and testing the preflexed sample in a... | 06/27/1978 |
| 4075885 | Rock borehole shear tester An expansible shear head device within a pulling cradle is lowered into a bore hole; and the device is expanded hydraulically to exert a predetermined normal pressure on the side walls of the bore hole. The pressure plates of the device are ribbed for per... | 02/28/1978 |
| 4018080 | Device for tensioning test specimens within an hermetically sealed chamber A device for tensioning test specimens within an hermetically sealed chamber. The device is characterized by a support column adapted to be received within an insulated, hermetically sealable chamber, a plurality of anchor pins mounted on the column for r... | 04/19/1977 |
| 3965729 | Load crack testing device A sustained constant load cantilever loading type specimen testing machine. he machine includes a rigid grip which grips one end of a specimen. The other end of the specimen is secured rigidly to a cantilever. A hydraulic piston is connected to the cantile... | 06/29/1976 |
| 3955408 | Fluidless bottle testing method and apparatus A fluidless bottle testing method and apparatus are disclosed. After being subjected to a squeeze test for side wall strength, bottles are moved to a bottle bottom tester which places the outer surfaces of the bottom and of the lower side wall of the bott... | 05/11/1976 |
| 3942362 | Roof truss testing machine A truss to be tested is laid on its side on a table having an upstanding flange along one side. A load cell is interposed between one end of the bottom chord of the truss and the table flange and a block is interposed between the opposite end of the botto... | 03/09/1976 |
