A tunable machining tool having a plurality of actuator devices, each operating at a uniform frequency but phase shifted by a controllable amount so as to create an vibratory output at a frequency that is a multiple of the input frequency. ...http://www.google.fr/patents/US20040155558?utm_source=gb-gplus-shareBrevet US20040155558 - Tunable vibratory actuator
Numéro de demande: 10/409,746 Numéro de publication: US 2004/0155558 A1 Date de dépôt: 8 avr. 2003 Brevet délivré: US7259496 ( Date de délivrance 21 août 2007)
