chipping hammer drill and practice in internal combustion engine

摘要

To enable a portable power tool (such as a drilling and chiselling tool) of the kind which is powered by an internal-combustion engine, to be constructed with a relatively small flywheel 15, and to ensure that the flywheel has adequate kinetic energy at slow speeds of the engine, the flywheel 15 is mounted upon the engine crankshaft 4 by way of a step- up gearing. In the illustrated use, such gearing comprises a planetary system. IMAGE