Piston
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United States of America Patent
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Jan 20, 2015
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N/A
app pub date -
Jul 31, 2012
filing date -
Aug 10, 2011
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Abstract
A piston for a free piston engine generator, comprising one or more elements arranged coaxially along a piston shaft wherein the length of the piston is at least five times its maximum diameter, wherein at least one of the elements is formed from a magnetically permeable composite material having isotropic electrical resistivity at least twice that of electrical steel this arrangement providing improved free piston position control, more consistent combustion and improved electrical conversion efficiency.
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