Safety device for portable tools with a heat engine, capable of stopping the operation thereof after sudden, violent movements
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United States of America Patent
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Nov 12, 2013
Grant Date -
Aug 4, 2011
app pub date -
Aug 25, 2009
filing date -
Aug 29, 2008
priority date (Note) -
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Abstract
A safety apparatus for a portable tool having an internal combustion engine has at least one accelerometer providing a measurement of an acceleration of the portable tool in at least one plane or axis. An electronic controller is connected to an output of the accelerometer so as to receive analog or digital information. A generator is driven by the internal combustion engine so as to supply power to the accelerometer. A management card processes the analog or digital information so as to activate the system acting on an ignition exciter box so as to nearly instantaneously stop the internal combustion engine when the acceleration of the portable tool exceeds a predetermined level.
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