(19)
(11) EP 3 973 227 A1

(12)

(43) Date of publication:
30.03.2022 Bulletin 2022/13

(21) Application number: 20809230.4

(22) Date of filing: 20.05.2020
(51) International Patent Classification (IPC): 
F23L 9/02(2006.01)
F24B 5/02(2006.01)
 F23L 9/06(2006.01)
(52) Cooperative Patent Classification (CPC):
Y02E 20/34; F23L 9/06; F23L 9/02; F23B 60/02; F23B 90/04; F24B 1/19; F24B 5/025
(86) International application number:
PCT/FI2020/050339
(87) International publication number:
WO 2020/234514 (26.11.2020 Gazette 2020/48)
(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: 23.05.2019 FI 20195427

(71) Applicant: NPI-Engineering Oy
20360 Turku (FI)

(72) Inventors:
  • NIELIKÄINEN, Janne
    32200 LOIMAA (FI)
  • LAAKSO, Juuso
    21260 RAISIO (FI)

(74) Representative: Berggren Oy 
P.O. Box 16 Eteläinen Rautatiekatu 10A
00101 Helsinki
00101 Helsinki (FI)

   


(54) A SECONDARY AIR CASING FOR A FIREPLACE