Bolt
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United States of America Patent
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Jan 11, 2011
Grant Date -
Mar 5, 2009
app pub date -
Jun 13, 2005
filing date -
Jun 13, 2005
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
In a bolt of the present invention, a guide portion having a small diameter is formed at the distal end of a shaft portion and ridge having an inverted direction screw configuration relative to the ridge formed on a constant diameter portion is formed. When the bolt is inserted obliquely into a nut and the ridge gets into engagement with a female screw portion of the nut, an effect of floating the bolt is generated, and the bolt cannot be driven into the nut unless it is set in an appropriate tightening posture. Consequently, biting and seizing of the bolt to the nut can be prevented securely. If the ridge is formed into a double threaded screw having an inverted direction screw configuration, the effect can be further intensified.
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