Tightening machine having socket unit
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United States of America Patent
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Mar 17, 2015
Grant Date -
Jun 21, 2012
app pub date -
Dec 12, 2011
filing date -
Dec 15, 2010
priority date (Note) -
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status (Latency Note)
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Abstract
A tightening machine has a socket unit which tightens a reaction washer and a nut to each other. The socket unit includes an inner socket whose tip end can engage with the nut, and an outer socket formed concentrically with the inner socket. A tip end of the outer socket can engage with the reaction washer. The socket unit concentrically includes an inner socket holder and an outer socket holder. The inner socket holder and the outer socket holder can rotate in opposite directions from each other, and the outer socket holder is formed around an outer periphery of the inner socket holder. The inner socket is detachably engaged with the inner socket holder, and the outer socket is detachably engaged with the outer socket holder. The inner socket is engaged with the inner socket holder with clearance in its circumferential direction.
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