An improved air tool includes an integrated air motor and electrical generator wherein the stator is positioned on a side of the rotor body opposite the working end of the tool to reduce vibrations transmitted to the stator. The stator is also positioned between the compressed air inlet and the rotor...http://www.google.es/patents/US5525842?utm_source=gb-gplus-sharePatente US5525842 - Air tool with integrated generator and light ring assembly
Air tool with integrated generator and light ring assembly
