Adaptive cooling unit for a power tool
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United States of America Patent
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Dec 18, 2012
Grant Date -
Apr 29, 2010
app pub date -
Oct 13, 2009
filing date -
Oct 13, 2008
priority date (Note) -
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Abstract
A cooling unit for a power tool comprises a fan wheel (10) to be supported on an armature shaft (3) of a motor (1) of the power tool. The cooling unit comprises a torque transfer means as well as an actuating means (20, 22) for actuating this torque transfer means so as to selectively transfer the rotation of the armature shaft (3) to the fan wheel (10) during operation of the power tool.
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