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(11)

EP 3 774 439 A1

(12)

(43) Date of publication: 17.02.2021 Bulletin 2021/07 (21) Application number: 19726726.3 (22) Date of filing: 01.04.2019

(51) International Patent Classification (IPC):  B60L 53/80(2019.01) B60L 53/30(2019.01) B60S 5/06(2019.01) B60L 53/35(2019.01) (86) International application number: PCT/FI2019/050261 (87) International publication number: WO 2019/193250 (10.10.2019 Gazette 2019/41)

(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 (30) Priority: 03.04.2018 FI 20185306 06.07.2018 FI 20185628 (71) Applicant: Rumbletools OY 55100 Imatra (FI)	(72) Inventor: KOIVUHARJU, Arto 55100 Imatra (FI) (74) Representative: Berggren Oy, Tampere  Visiokatu 1 33720 Tampere 33720 Tampere (FI)