Force sensor for manually operated or pneumatic presses
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United States of America Patent
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Nov 21, 2017
Grant Date -
Nov 17, 2016
app pub date -
Dec 15, 2014
filing date -
Dec 20, 2013
priority date (Note) -
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Abstract
A force sensor for measuring axially occurring forces in manually operated or pneumatic presses has a central axis and an outer diameter and includes a bolt and a nut that preload between them a piezoelectric force washer with a plug connection. The washer has an inner end face defining a first bore having a first diameter with an internal thread. The bolt defines a throughbore with an internal diameter, a head portion and a hollow shaft defining a frontal external thread extending through the force washer and engaging the nut's internal thread. The nut or the head portion defines a second bore with a second diameter measuring smaller than the shafts internal diameter but at least one quarter of the outer diameter and at least as long as its diameter. The inner wall of the second bore defines a center mount for a sliding fit.
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