Method and apparatus for moving material
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United States of America Patent
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Dec 11, 2012
Grant Date -
Jun 24, 2010
app pub date -
Dec 29, 2009
filing date -
Feb 9, 2007
priority date (Note) -
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Abstract
An apparatus and method for providing ground fault protection to a lifting device utilizing an electromagnet and powered by a generator. The apparatus and method rectifies an AC voltage emanating from the generator source and monitors unsafe operating conditions of the generator's circuit wherein operation of the lifting device is ceased when predetermined electrical operating parameters are exceeded.
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