(19)

(11)

EP 3 857 134 A1

(12)

(43) Date of publication: 04.08.2021 Bulletin 2021/31 (21) Application number: 19864478.3 (22) Date of filing: 24.09.2019

(51) International Patent Classification (IPC):  F24F 11/00(2018.01) (86) International application number: PCT/US2019/052569 (87) International publication number: WO 2020/068730 (02.04.2020 Gazette 2020/14)

(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: 24.09.2018 US 201862735382 P (71) Applicant: Ravti Corporation Tampa, Florida 33609 (US)	(72) Inventors: RANGEL, Alexander Luis Tampa, Florida 33609 (US) KNALL, Laurence Wade Tampa, Florida 33609 (US) (74) Representative: Ernest Gutmann - Yves Plasseraud S.A.S.  c/o Plasseraud IP 66, rue de la Chaussée d'Antin 75440 Paris Cedex 09 75440 Paris Cedex 09 (FR)