ATBECHDEDKESFRGBGRITLILUNLSEMCPTIESILTLVFIROMKCYALTRBGCZEEHUPLSKBAHRIS......RS......................JDIM360 Ver 2.15 (14 Jul 2008) - 1620000/01806831EUROPEAN PATENT APPLICATIONA320100623EP06026791.120061222enenenMI2006001520060105IT2010062320102520070711200728H02M 3/10 20060101AFI20070426BHEP H02M 3/28 20060101ALI20070426BHEP A47L 9/28 20060101ALI20070426BHEP deTragbare Luftstromanwendung mit dualer StromversorgungenPortable air-flow appliance with dual electrical power supplyfrAppareil à débit d'air portable avec alimentation électrique double1AMETEK ITALIA S.r.l.0201139144094Via De' Barzi20087 Robecco sul Naviglio (Milano)ITCarioni, Antonio LuigiVia Alemanio Fino 1726013 Crema (CR)ITFaraggiana, Vittorioet al09319251Ing. Barzanò & Zanardo Milano S.p.A. Via Borgonuovo 1020121 MilanoITATBEBGCHCYCZDEDKEEESFIFRGBGRHUIEISITLILTLULVMCNLPLPTROSESISKTRALBAHRMKRS20100623201025

A portable airflow appliance (10) with an impeller (11) rotated by a universal electric motor (12) is powered alternatively by the electrical mains (13) or by an internal battery (14). It includes a DC-DC electronic converter unit (15) which converts the direct low voltage of the batteries (14) into a direct voltage intermediate between the battery voltage and the relatively high mains voltage and switching means (16) allowing sending to the motor (12) alternatively said intermediate voltage or said relatively high mains voltage.