(19)

(11)

EP 4 066 078 A1

(12)

(43) Date of publication: 05.10.2022 Bulletin 2022/40 (21) Application number: 21712705.9 (22) Date of filing: 19.02.2021

(51) International Patent Classification (IPC):  G05D 1/02(2020.01) (52) Cooperative Patent Classification (CPC): G05D 1/0044; G05D 1/0225; G05D 1/0234; G05D 1/0274; G05D 2201/0208; G05D 1/0219 (86) International application number: PCT/CN2021/076880 (87) International publication number: WO 2021/164738 (26.08.2021 Gazette 2021/34)

(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: 19.02.2020 CN 202010102227 06.07.2020 CN 202010642954 (71) Applicant: Positec Power Tools (Suzhou) Co., Ltd. Suzhou, Jiangsu 215123 (CN)	(72) Inventors: MA, Steven Houghton, MI 49931 (US) HOFFMAN, John Houghton, MI 49931 (US) (74) Representative: Dentons UK and Middle East LLP  One Fleet Place London EC4M 7WS London EC4M 7WS (GB)