MAGNETIC FLUX LEAKAGE INSPECTION DEVICE
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United States of America Patent
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Issued Date -
Sep 29, 2011
app pub date -
Mar 29, 2010
filing date -
Mar 29, 2010
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Disclosed are a method and an improvement to the existing conventional magnetic flux leakage inspection device that employ some fixed magnets that are fixed inside the magnet yoke and some movably adjustable magnets, allowing their dipole orientation to be adjusted between 0° and 180° relative to that of the fixed magnets. A lever and gear set connected to the adjustable magnets can be operated to achieve desired level of magnetic strength of the device, including turning off the whole magnetic field, by causing the fields of the fixed and adjustable magnets to cancel each other. The disclosed adjustable yoke can also be used in other NDT/NDI applications where providing an adjustable magnetic strength is desirable.
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