Vibration damping apparatus for power tool e.g. chain saw has anti vibration device that is switched between two positions based on engine speed

摘要

An anti vibration device (34) is switched between two positions based on engine speed. The handle is connected to the internal combustion engine of the power tool through the anti vibration device. The anti vibration device has a characteristic curve in one position and a different characteristic curve in another position in a predetermined frequency range.