Method for switching the striking stroke of a striking piston of a percussion device
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United States of America Patent
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May 29, 2018
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N/A
app pub date -
Dec 3, 2012
filing date -
Dec 9, 2011
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Abstract
A switching method includes starting up a percussion device in acting on a control device arranged to vary the striking stroke of the striking piston between a short striking stroke and a long striking stroke. The percussion device is forced to operate on a short striking stroke for a predetermined period of time from the starting up of the device, and in acting on the control device so as to allow the percussion device to operate on a long striking stroke, after the expiry of the predetermined period of time.
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