(12) EUROPEAN PATENT APPLICATION (11) EP 3 800 012 A1 (43) Date of publication:  07.04.2021 Bulletin 2021/14 (21) Application number:  19200836.5 (22) Date of filing:  01.10.2019 (51) Int Cl.: B25F 5/00 (2006.01) (84) Designated Contracting States:  AL AT BE BG CH CY CZ DE DK EE ES FI FR GB  GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO  PL PT RO RS SE SI SK SM TR Designated Extension States:  BA ME Designated Validation States:  KH MA MD TN (71) Applicant:  Valentini, Guido 20122 Milano (IT) (72) Inventor:  VALENTINI, Guido 20122 Milano (IT) (74) Representative:  Wörz, Volker Alfred Herrmann Patentanwälte  Königstraße 30 70173 Stuttgart (DE) (54) ELECTRICALLY DRIVEN HAND-GUIDED POWER TOOL (57) The invention refersto an electricpowertool(1), in particular a polisher or a sander, comprising a tool housing (2) with a recess (7) for receiving at least a part (9) of a battery pack (6), the battery pack (6) being elec- trically connected to the power tool (1) upon complete insertion of the part (9) of the battery pack (6), in order to operatethe power tool(1) bymeans ofelectric energy originating from the battery pack (6). It is suggested that the power tool (1) comprises an adapter element (4) having an adapter housing (15) at least part (8) of which adapted to be inserted into the recess (7) after removal of the battery pack (6) and to establish an electric connection with the power tool (1), the adapter element (4) being connected to an external power supply unit (40) by means of a first electric cable (5) and the power supply unit (40) being connectable to an electronic mains power supply by means of a second electric cable (41),the powersupplyunit(40)comprising an electric transformer (42) for transforming the electric energy from the mains power supply into electric energy for operation of the power tool (1). Printed by Jouve, 75001 PARIS (FR) EP 800 012 A1 (19)