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Class 73/841 - Shear


Subclass of Class 73 - Measuring and testing
Definition: Subject matter wherein the loading is applied to a section
No. of patents: 78
Last issue date: 04/12/2011


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NumberTitleIssue Date
6431009Dynamic shear test sample and method
A method and apparatus for creating dynamic shear within metallic and non-metallic test sample materials under controlled conditions related to high ballistic impact includes the use of test sample having an end face with non-symmetrically placed surfaces...
08/13/2002
6418795Method of measuring shear friction factor through backward extrusion process
A method of measuring shear friction factor between a workpiece material and a forming tool through a backward extrusion process. The method includes steps of: positioning the workpiece material at a groove previously manufactured on the forming die by tu...
07/16/2002
6408698Sensors and method for measurement of flow rates and cumulative flow in ducts
The present invention relates to a sensor for measuring the instantaneous rate of mass flow and the cumulative mass flow in steady or unsteady flows of single-phase liquids or gases in a duct. By measuring the shear stress or the streamwise pressure gradi...
06/25/2002
6393904Stress test rig for helicopter transmissions
The inventive stress test rig for helicopter transmission comprises a first test rig transmission (16) which is driven by a motor (38) and forms a closed stress circuit via shafts (4, 14, 54), connecting couplings (12) a stress mechanism (40, 42), a secon...
05/28/2002
6341531Method for improving the archiving of dynamic parameters
A method for improving the archiving of a curve plotted from at least N (Nࣙ5) measured experimental values of a dynamic parameter P of a viscoelastic material where this parameter is a function of the deformation q at a given temperature, characterized ...
01/29/2002
6341532Shear force microsensor
A micro-dimensional sensor measures the shear force, both in magnitude and direction, at the surface of a solid boundary as a fluid flows over that boundary. The sensor is a micro-mechanical capacitor-transducer system that includes a micro-dimensioned fl...
01/29/2002
6334362Device for measuring the shearing in the core of a sandwich structure
The invention relates to a device for measuring the shearing action in the core of a sandwich structure, for instance a hull. The device comprises a sensing means, e.g. a cylindrical rod, and a measuring instrument. The rod is adapted to be inserted into ...
01/01/2002
6324916Testing shear bond strength
The present invention provides an apparatus and a method to apply a load to an adherend, which is bonded to a substrate, to allow an accurate measurement of the bond between an adherend and substrate. The strength of the bond is tested by shearing the adh...
12/04/2001
6308579Apparatus and methods for forming a bond strength adherend
Apparatus and methods for forming an adherend and bonding the adherend to a test piece. A bonding and molding platform is used to form a cylindrically shaped adherend that is bonded to the test piece. The bonding and molding platform limits the bond site ...
10/30/2001
6131469Shear force measurement device for beds and method
The present invention is a device to measure the parallel shear force on a mattress. The device has a motor, a weighted object, a high friction material pad, and a load cell. The motor moves by pushing and pulling the weighted object on the high friction ...
10/17/2000
6112600Measuring platform for weight and brake system monitoring
The measuring platform according to the invention, for recessing into road surfaces, consists of a base plate and cover plate supported in cross section on two supporting points fitted with piezoelectric shear crystals, enabling the shear force of an over...
09/05/2000
6003382Computer control shear cell tester
A computer controlled shear cell (CCSC) tester for bulk solids, especially powders, that allows the determination of a Yield Locus curve from a single test procedure. The principle of the CCSC is that yield states can be maintained in a test cell over a r...
12/21/1999
5965849Structure for mounting a sensing element for measuring a load of a vehicle
First and second case assemblies with their respective sensing elements stored into and fixed to the interior portions thereof are respectively stored into the first and second middle diameter portions of a shackle pin which not only are respectively loca...
10/12/1999
5948993Amplified shear transducer
A 15 mode piezoelectric sensor with mechanical amplification is provided. e sensor consists of two piezoelectric members mounted on an electronically inert, rigid substrate. The two members have an electronically inert amplification device connected betwe...
09/07/1999
5872317Method for measuring wall shear stress due to fluid flow in piping systems
A method and apparatus for measuring wall shear stress in pipe as a result of fluid flow therethrough employs a glass flow tube, magnetic particles of sufficiently small size such that the form drag force on the individual particles is orders of magnitude...
02/16/1999
5773717Apparatus and related methods for determining lateral tire tread stiffness
An apparatus for determining lateral tire tread stiffness includes a holding fixture that is coupled to a loading fixture. The holding fixture includes a frame on which is mounted a rotary table that carries the tire tread specimen to be tested. The loadi...
06/30/1998
5739436Methods 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
5712431Device 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
5693889Method for monitoring surface stress
A piece of single crystal silicon is embedded in a material such that the licon is flush with the surface thereof. The silicon is illuminated with infrared radiation having a wavelength in the range of 800-1100 nanometers. Isochromatic fringe patterns pro...
12/02/1997
5658507Method for the pre-estimation of extruding pressure and extruding velocity in the extrusion molding of particle-reinforced composites
The extrusion moldability of particle-reinforced composites under fresh cition relative to the extruding pressure and extruding velocity can be pre-estimated from the cohesion and the coefficient of internal friction of the composite which can be calcula...
08/19/1997
5456119Sensing element for vehicle load measuring device
A sensing element in a load measuring device includes two cylindrical holders, each having a hole along the central axis; and a plate-shaped member provided between the two cylindrical holders, the plate-shaped member having protrusions at both ends, a co...
10/10/1995
5394754Apparatus for testing a hem flange and method for same
A test apparatus for testing hem flanges that join automotive body panels is provided. This testing apparatus operates by engaging a hook member with a first body panel such that the first body panel is maintained in a held relationship with respect to th...
03/07/1995
5379648Method and apparatus for testing chew-out strength of paperboard core
The invention provides a method and apparatus for testing the chew-out strength of paperboard cores. The apparatus of the invention includes a clamping element for clamping a tubular core to prevent rotation thereof; a splined chuck element in the form of...
01/10/1995
5325722Split pipe testing device for the measurement of bond of reinforcement under controlled confinement
A method and apparatus for determining the stress-slip relationship of specimens in concrete including a pipe with a plurality of longitudinal slots evenly spaced around the circumference of the pipe, a specimen and concrete block located in one end of th...
07/05/1994
5221500Mechanical in situ curometer
An in situ curometer has been developed to follow the cure of thick articles during molding, by measuring continuously the dynamic mechanical properties (shear modulus and loss angle). The apparatus is designed to provide cure data on curable articles suc...
06/22/1993
5036709Paving materials testing machine
An electronically instrumented combination kneader compactor and plane-strain, simple-shear testing machine for use in testing paving materials under cyclic loading and over a range of temperatures and various rates of shear has been described. A very sig...
08/06/1991
4854175Simple shear device for testing earthen materials and powders
A simple shear device and method for its use to test stress and strain characteristics of earthen samples and powders. The shear device particularly comprises a stacked plurality of plates which are slidably movable laterally relative to one another, whic...
08/08/1989
4845995Material tester
A material tester which allows for material characterization under hydrodmic loading including very high rates of loading such as found in ballistic applications, and which includes various interchangeable fittings to allow the tester to simultaneously s...
07/11/1989
4819488Apparatus for testing the resistance to cleavage of cardboard tubes
An apparatus for testing the resistance to cleavage of cardboard tubes which have previously been cut into test pieces which includes a key mandrel which is mounted free to rotate, at least one sleeve for each test piece having a different outer diameter,...
04/11/1989
4794788Method and apparatus for rheological testing
A method and apparatus for testing samples of viscoelastic materials are shown, in which the sample is subjected to a sinusoidal excitation and the response to the excitation is measured. By sampling the response at at least three data points equally spac...
01/03/1989
4680897Method 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
4633712Apparatus for, and method of, testing and pulverizing particulate material
Apparatus for determining the mechanical properties of particulate material comprises an outer member defining a cylindrical cavity, and an inner member rotatable in the cavity, the inner and outer members together defining a pulverizing chamber. The inne...
01/06/1987
4539838Variable volume dual action rheometer
The invention comprises a device which performs the functions of both a Mooney Viscometer and an Oscillating Disk Rheometer to measure the visco-elastic properties of rubber and rubber-like materials. Rotational and oscillating motion are transmitted to a...
09/10/1985
4539851Soil and rock shear tester
A device for determining the shear strength of rock and soil is disclosed. The device includes means for supporting the device within a borehole, a primary shaft, a plurality of shearing units slidably attached to the shaft having shear heads which are mo...
09/10/1985
4475392Skin friction gage for time-resolved measurements
A method and a gage for time-resolved skin-friction measurements. The gage is a composite structure comprised of a heated, flush-mounted, guard film and a hot wire mounted to an electrically insulated very low thermal conductivity material plug in the vic...
10/09/1984
4290302Biaxial shear force gauge
A gauge for use with a test specimen that is made of a preselected ablative material to be tested, and that is in a high temperature gaseous flow (i.e., a hot environment) which is capable of ablating the test specimen, and which also is capable of induci...
09/22/1981
4155265Interface shear transducer
A shear transducer having two cylindrical bending beams with two full strain gage bridges so arranged to cancel acceleration induced by forces in the axis of interest....
05/22/1979
4155250Viscometer
A viscometer wherein a sample of the material to be tested is introduced into the annular clearance between a stationary cylinder and a vertical shaft which carries several weights. As the shaft descends at a speed which is a function of the combined mass...
05/22/1979
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