(19)

(11)

EP 4 018 126 A1

(12)

(43) Date of publication: 29.06.2022 Bulletin 2022/26 (21) Application number: 20855807.2 (22) Date of filing: 12.08.2020

(51) International Patent Classification (IPC):  F23D 14/58(2006.01) F23G 7/06(2006.01) F23D 14/02(2006.01) (52) Cooperative Patent Classification (CPC): F23D 14/22; F23D 14/32; F23G 5/12; F23G 7/065; F23G 2209/142 (86) International application number: PCT/IB2020/057564 (87) International publication number: WO 2021/033080 (25.02.2021 Gazette 2021/08)

(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: 21.08.2019 KR 20190102247 (71) Applicant: CSK Inc. Yongin-si 17030 (KR)	(72) Inventors: LEE, Pil-Hyong Yongin-si, Gyeonggi-do 17030 (KR) SHIN, Hee Jun Yongin-si, Gyeonggi-do 17030 (KR) LEE, YoungWoong Yongin-si, Gyeonggi-do 17030 (KR) NOH, MyungKeun Yongin-si Gyeonggi-do 17030 (KR) CHO, Hyeon Yun Yongin-si, Gyeonggi-do 17030 (KR) (74) Representative: Norton, Ian Andrew  Edwards Limited Innovation Drive Burgess Hill West Sussex RH15 9TW West Sussex RH15 9TW (GB)