Method and apparatus for tightening or loosening screw-type connections
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United States of America Patent
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Nov 24, 1987
Grant Date -
N/A
app pub date -
Jun 13, 1986
filing date -
Jun 20, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method and apparatus for tightening or loosening screw-type connections, in which the screw bolt is stimulated to oscillate longitudinally, the natural frequency of the bolt is measured and the excitation frequency is made to follow the changing natural frequency during the bolting process with a minimum, necessary excitation energy, so that the screw bolt attains a permanent state of resonance.
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