(19)

(11)

EP 3 924 658 A2

(12)

(88) Date of publication A3: 24.09.2020 (43) Date of publication: 22.12.2021 Bulletin 2021/51 (21) Application number: 20756329.7 (22) Date of filing: 07.02.2020

(51) International Patent Classification (IPC):  F16L 11/00(2006.01) F16L 21/00(2006.01) (52) Cooperative Patent Classification (CPC): F16L 11/00; F16L 21/00 (86) International application number: PCT/RU2020/000061 (87) International publication number: WO 2020/167165 (20.08.2020 Gazette 2020/34)

(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: 12.02.2019 RU 2019103962 (71) Applicant: Yazykov, Andrey Yurievich Moscow 119619 (RU)	(72) Inventor: Yazykov, Andrey Yurievich Moscow 119619 (RU) (74) Representative: Smirnov, Alexander  A. Smirnov & Co Patent and Trademark Agency Alises 10-69 1046 Riga 1046 Riga (LV)