(19)

(11)

EP 3 658 712 A1

(12)

(43) Date of publication: 03.06.2020 Bulletin 2020/23 (21) Application number: 18837287.4 (22) Date of filing: 25.07.2018

(51) International Patent Classification (IPC):  E01F 9/673(2016.01) E01F 9/685(2016.01) E01F 9/677(2016.01) E04H 12/22(2006.01) (86) International application number: PCT/FI2018/050553 (87) International publication number: WO 2019/020867 (31.01.2019 Gazette 2019/05)

(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: 25.07.2017 FI 20170127 U (71) Applicant: RENTTO, Seppo Edvard 02750 Espoo (FI)	(72) Inventor: RENTTO, Seppo Edvard 02750 Espoo (FI) (74) Representative: Heinonen & Co  Attorneys-at-Law Ltd Fabianinkatu 29 B 00100 Helsinki 00100 Helsinki (FI)