A pulsed irrigation handpiece comprises a pulsed irrigation liquid outlet for applying liquid pulses to a surgical site, a pump unit reciprocatingly driveable for pumping pulses of irrigation liquid through the outlet, an electric powered drive unit for reciprocatingly driving the pump unit, and a housing...http://www.google.com/patents/US6746419?utm_source=gb-gplus-sharePatent US6746419 - Irrigation handpiece with built in pulsing pump
