Screw instrumented with extensometric strain gauges to measure the tensile and/or shear strain experienced by the screw
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United States of America Patent
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Aug 4, 2020
Grant Date -
Jul 12, 2018
app pub date -
Jul 8, 2016
filing date -
Jul 9, 2015
priority date (Note) -
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status (Latency Note)
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Abstract
Screw having a head and a threaded cylindrical body, the head being provided with strain gauges arranged so as to be deformed in order to measure a stress within the screw, the gauges being connected or able to be connected to a power supply and to a determination unit for determining the value of at least one inner stress from the deformations of the gauges. The head has, on the upper face thereof, a conical hole having a revolution axis that is aligned with the revolution axis of the cylindrical body. The gauges are arranged on the wall of the conical hole so as to be deformed together with the conical hole and are oriented to measure at least one type of inner stress selected among the tension and the shearing.
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