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| Number | Title | Issue Date |
| 7389698 | Nutplate bond strength tester unit A bond strength tester unit is provided for testing adhesive bond strength of a nutplate or the like attached to a substrate, such as by adhesive bonded attachment to a blind side of the substrate in substantial alignment with a substrate opening. The nutplate may b... | 06/24/2008 |
| 7363823 | Twin-headed toothbrush A toothbrush includes: a handle shaped and dimensioned to be grasped by a human hand; necks coupled to the handle; bristle supports coupled to the necks; and bristles coupled to the bristle supports. The toothbrush, through the bristles coupled to the bristle suppor... | 04/29/2008 |
| 7249523 | Apparatus and method for measuring mechanical properties A rheological measurement can be made comprising the steps of disposing a sample to be measured between two opposing surfaces of a fixture; coupling two opposing surfaces of the sample with a corresponding adjacent one of the two opposing surfaces of the fixture to ... | 07/31/2007 |
| 6962086 | Rheometer A rheometer 1, an example of which is shown in FIG. 1, comprising an upper die 2 and a lower die 3. Extending on the vertical axis of this die arrangement is a pneumatic cylinder shaft 6, which is connected to the heater element | 11/08/2005 |
| 6877362 | METHOD AND DEVICE FOR EVALUATING PROCESSABILITY OF VISCOELASTIC MATERIAL, METHOD FOR SETTING CONDITION FOR PROCESSING VISCOELASTIC MATERIAL, AND DEVICE FOR PROCESSING VISCOELASTIC MATERIAL; AND METHOD FOR CONTROLLING PROCESSING OPERATION OF VISCOELASTIC MATERIAL A method and a device evaluate a processability of a viscoelastic material. A measuring step and means measure a complex viscosity modulus η* and two complex elasticity moduli G*1, G*2 in respective two shear ranges with different shear speeds, by the following: va... | 04/12/2005 |
| 6783272 | Induction-heated disc tribometer A disc tribometer for measuring tribological, mechanical and thermal phenomena including at least a first rotary support for receiving a test sample, a second rotary support for receiving a second test sample, means for measuring torque applied to each of the suppor... | 08/31/2004 |
| 6612184 | Method and apparatus for testing bonded tubular joints There is provided a method of testing a joint formed by bonding of two tubulars, which method comprises the steps of holding a first tubular; applying a force to displace a second tubular relative to the first tubular; and removing the force. The final po... | 09/02/2003 |
| 6598486 | Portable device for testing the shear response of a material in response to a repetitive applied force A portable device for measuring the shear properties of a material specimen under applied dynamic circumferential forces against the specimen perpendicular to a longitudinal axis of said specimen. The device may further apply a dynamic force against an en... | 07/29/2003 |
| 6178825 | Honeycomb shear testing method A shear test fixture and method determines the shear strength of a honeycomb having elongated cells extending between two ends filled with a filler material with a load applied to one end relative to the other end introducing shear stress without introduc... | 01/30/2001 |
| 6164818 | Method and apparatus for measuring viscous heating of viscoelastic materials Method and apparatus for measuring viscous heating/heat build-up of viscoelastic materials, such as rubber and polymer compounds. Temperature changes in the viscoelastic material are measured during application of a shearing force to the viscoelastic mate... | 12/26/2000 |
| 5882929 | Methods and apparatus for the conditioning of cartilage replacement tissue Apparatus and methods are disclosed for maturing a biopolymer tissue construct in vitro prior to use as a replacement construct in vivo as, for example, a graft, implant, or prosthesis. The tissue is seeded with specific cells, exposed to a maturation flu... | 03/16/1999 |
| 5739436 | Methods and apparatus for measuring double-interface shear in geosynthetics and geomaterials The present invention generally provides a double-interface shear device for measurement of interface strength between geosynthetics and geomaterials. The device provides for the convenient application of normal loads, for the measurement of interface str... | 04/14/1998 |
| 5712431 | Device and method for testing the shear response of a material in response to an applied force A portable device for measuring the shear properties of compacted asphalt mixes under applied dynamic loading conditions. The device includes first and second material retaining members which form a material receiving pocket for containing the compacted a... | 01/27/1998 |
| 5565626 | Simulation of pyroshock environments using a tunable resonant fixture Disclosed are a method and apparatus for simulating pyrotechnic shock for the purpose of qualifying electronic components for use in weapons, satellite, and aerospace applications. According to the invention, a single resonant bar fixture has an adjustabl... | 10/15/1996 |
| 5509298 | Apparatus and method for measuring visco-elastic characteristics of a sample Apparatus for measuring the fluid characteristics of a sample comprises a frame, at least a first stage mounted on the frame for rectilinear movement, first mounting means mounted on the first stage, and a first member carried by the mounting means, a sec... | 04/23/1996 |
| 5349847 | Releasable stationary plate for rheometer A stationary plate assembly for a rheometer that selectively provides steady state and dynamic testing of melt viscoelastic characteristics of a material sample. The stationary plate assembly has a stationary sample plate magnetically coupled to its suppo... | 09/27/1994 |
| 5311767 | Instrument and method for viscoelasticity measurements The invention relates to an instrument and method for measuring the viscoelastic properties of rubber and like materials comprising two opposed dies, each die having a die housing, the dies and housings being moveable between an open position and a closed... | 05/17/1994 |
| 5309768 | Automation of test instruments A method of operating an instrument for testing the physical properties of materials in which each of a series of samples of the material to be tested is placed in a test position located between dies, the dies are closed to mould the material to a test s... | 05/10/1994 |
| 5289723 | Antisymmetric grain support test device and methods A testing apparatus and methods for use with a tensile testing machine for simulating thermal, acceleration, and ignition pressurization loads upon a grain support system of a solid rocket motor during ignition. The apparatus includes a pair of antisymmet... | 03/01/1994 |
| 5280730 | Apparatus for the compressive testing of testpieces for interlaminar shear tests and processes for the shear testing of testpieces, particularly curved testpieces Apparatus for testing testpieces (11) in the form of small plates, in which the testpiece is grasped between two pairs of jaws (12,13), which can be moved together. The jaws (12,13) are mounted on the platens (1,4) without hyperstaticity, which reduces th... | 01/25/1994 |
| 5079956 | Testing of viscoelastic materials In a method of testing a sample of viscoelastic material held under pressure between two opposing, temperature-controlled dies, the sample is subjected to an oscillatory, rotary shearing force which has a predetermined amplitude and a frequency within the... | 01/14/1992 |
| 4552025 | Multifunction processability testing method and apparatus A method and apparatus for testing samples of viscoelastic materials are shown, in which the sample is contained under pressure between two dies and the forces involved in rotating one die with respect to the other. The method uses different frequencies o... | 11/12/1985 |
| 4445387 | Compression shear test jig A compression shear test jig for determining the internal shear strength of the weakest plane of a wood fiber or particle panel product. The test jig comprises an upper and lower loading head adapted to be used in conjunction with a universal testing mach... | 05/01/1984 |
| 4343190 | Moving die rheometer, method of testing materials therewith, and die for use therein The rheological properties of a viscoelastic material are measured by enclosing a sample of the material between two die members which have protrusions extending therefrom and intermeshing to form shear zones therebetween. The sample is sheared by displac... | 08/10/1982 |
| 4092849 | Method and apparatus for measuring melt elasticity of polymers An apparatus and method for measuring the elastic properties of polymer melts and polymer solutions including the placement of a specimen of the material to be tested, within the intervening space between two members both of which are capable of low frict... | 06/06/1978 |
