(19)

(11)

EP 4 097 299 A1

(12)

(43) Date of publication: 07.12.2022 Bulletin 2022/49 (21) Application number: 21700219.5 (22) Date of filing: 14.01.2021

(51) International Patent Classification (IPC):  E01B 1/00(2006.01) (52) Cooperative Patent Classification (CPC): E01B 1/005; E01B 2204/01 (86) International application number: PCT/EP2021/050638 (87) International publication number: WO 2021/151675 (05.08.2021 Gazette 2021/31)

(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: 28.01.2020 EP 20154091 (71) Applicant: Sonneville AG 4842 Luterbach (CH)	(72) Inventors: LABORENZ, Peter 2576 Lüscherz (CH) PEREZ, Jose David 3008 Bern (CH) (74) Representative: AMMANN PATENTANWÄLTE AG  Schwarztorstrasse 31 3001 Bern 3001 Bern (CH)