(19)

(11)

EP 3 824 161 A1

(12)

(43) Date of publication: 26.05.2021 Bulletin 2021/21 (21) Application number: 19721931.4 (22) Date of filing: 16.04.2019

(51) International Patent Classification (IPC):  F01B 17/02(2006.01) F01B 25/02(2006.01) F01B 21/02(2006.01) F01B 1/08(2006.01) (86) International application number: PCT/US2019/027620 (87) International publication number: WO 2020/018161 (23.01.2020 Gazette 2020/04)

(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: 16.07.2018 ZA 201804722 (71) Applicant: US Air Technology, Inc. Marco Island, Florida 34104 (US)	(72) Inventor: COLE, Barry Walter Marco Island, Florida 34104 (US) (74) Representative: Berggren Oy  P.O. Box 16 Eteläinen Rautatiekatu 10A 00101 Helsinki 00101 Helsinki (FI)