Shear screw
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United States of America Patent
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Nov 27, 2012
Grant Date -
Aug 6, 2009
app pub date -
Nov 17, 2008
filing date -
Dec 11, 2007
priority date (Note) -
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status (Latency Note)
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Abstract
A shear screw has predetermined breaking points in two planes, separated axially from one another, and it has centrally a blind hole extending over a substantial length and having a cross section which is suitable for transmitting a torque to the shear screw by means of a pin-like tool of adapted dimensions which can be inserted into the blind hole. The blind hole extends to about level with the predetermined breaking point which is arranged in the lower region, facing the end face of the shear screw, of the latter and has a strength greater than that of the other predetermined breaking point.
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