Measuring and testing – Specimen stress or strain – or testing by stress or strain... – Specimen clamp – holder – or support
Patent
1998-04-02
1999-09-07
Noori, Max
Measuring and testing
Specimen stress or strain, or testing by stress or strain...
Specimen clamp, holder, or support
73857, 73796, G01N 302
Patent
active
059489944
ABSTRACT:
A multi-functional test machine is provided. The machine includes a frame with a pair of upright columns parallel extended upward from a foundation, an upper crosshead system slidably engaged on the columns and actuated by a pair of hydraulic jacks butting the columns, a ball bearing suspending from a hollow sphere casing in the upper crosshead system to connect with an upper specimen grip and fastened by a plurality of hydraulic buckles, a lower crosshead system fixed to a lower part of the columns including a rotatable hydraulic cylinder and a linear hydraulic cylinder disposed in alignment in the system to rotatably or slidably actuate a actuator shaft to which a lower specimen grip is engaged so that the test machine in capable of self-alignment and carrying out both torsion and tension-compression test for a specimen, this disclosure further includes a series of detective apparatus such as stress sensors, rotatable and linear displacement detectors which send the tension and displacement information of the specimen grips to a computer and automatically make stress compensations to the upper specimen grip.
REFERENCES:
patent: 4846888 (1989-07-01), Gram et al.
patent: 4854997 (1989-08-01), Shimada
patent: 4869112 (1989-09-01), Gram et al.
patent: 4928532 (1990-05-01), O'Connor et al.
patent: 5138887 (1992-08-01), Pohl
Jen Ming-Hwa R.
Lin Wei-Hwang
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