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(11)

EP 3 906 384 A1

(12)

(43) Date of publication: 10.11.2021 Bulletin 2021/45 (21) Application number: 19748980.0 (22) Date of filing: 28.06.2019

(51) International Patent Classification (IPC):  F28D 9/00(2006.01) F28F 3/08(2006.01) F28F 21/06(2006.01) F28F 3/04(2006.01) F28F 3/10(2006.01) F28F 21/08(2006.01) (52) Cooperative Patent Classification (CPC): F28F 21/086; F28F 3/10; F28F 2275/025; F28F 2275/04; F28F 2275/06; F28D 2021/0068; F28F 21/065; F28F 2275/20; F28D 9/0006; F28F 21/083; F28D 9/005; F28F 3/083; F28F 2255/06; F28F 2215/10; F28F 3/046; F28D 2021/0042; F28D 2021/0059; F28D 2021/0022 (86) International application number: PCT/PL2019/000048 (87) International publication number: WO 2020/141982 (09.07.2020 Gazette 2020/28)

(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: 04.01.2019 PL 12794519 U (71) Applicant: Secespol Spólka Zo.o 82-100 Nowy Dwór Gdanski (PL)	(72) Inventors: SIEMIE CZUK, Bart omiej 80-516 Gda sk (PL) MICIAK, Wojciech 82-300 Elbl g (PL)