Thread forming fasteners for ultrasonic load measurement and control
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United States of America Patent
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May 24, 2011
Grant Date -
Jun 24, 2010
app pub date -
Jan 11, 2010
filing date -
Jan 29, 2001
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Abstract
An ultrasonic load measurement transducer is mated with a thread-forming fastener to provide a load indicating thread-forming fastener that can be used for the precise and reliable assembly of critical bolted joints, such as those in the automobile and aerospace industries, among others. Steps can then be taken to accurately measure and control the load in the thread-forming fastener during tightening, and to inspect the load in the thread-forming fastener after assembly. A similar result can be achieved for a thread-locking fastener by mating an ultrasonic transducer with the thread-locking fastener assembly.
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