Metal working – Method of mechanical manufacture – With testing or indicating
Reexamination Certificate
2006-12-08
2011-10-11
Cozart, Jermie (Department: 3726)
Metal working
Method of mechanical manufacture
With testing or indicating
C029S407050, C029S525010, C029S525020, C029S525110, C073S761000, C411S368000, C411S190000, C081S055000
Reexamination Certificate
active
08033000
ABSTRACT:
A screwed connection has a threaded bolt; a nut; a washer arranged between the nut and a surface of a component to be clamped; a screwing device with a housing, a holding tool connected to the housing, and a tightening tool that engages positively the nut; a measuring element arranged in the washer for measuring a compressive force generated by tightening the screwed connection. The washer has an anti-rotation device oriented toward the surface of the component. The outer periphery of the washer is positive-lockingly engaged by the holding tool. The washer has no positive or frictional connection to the threaded bolt, and the holding tool has no torque supporting action on the threaded bolt or on any other part so that a reaction moment, generated when tightening the nut, is introduced from the housing of the screwing device through the washer into the component to be clamped.
REFERENCES:
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patent: 4159483 (1979-06-01), Bettin
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patent: 6490952 (2002-12-01), Junkers
patent: 2004/0131445 (2004-07-01), Kjellberg
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patent: 2004097232 (2004-11-01), None
Hohmann Frank
Hohmann Jörg
Cozart Jermie
Huckett Gudrun E.
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