(19)

(11)

EP 4 511 565 A1

(12)

(43) Date of publication: 26.02.2025 Bulletin 2025/09 (21) Application number: 23721532.2 (22) Date of filing: 12.04.2023

(51) International Patent Classification (IPC):  F01K 3/00(2006.01) F01K 3/18(2006.01) F01K 25/10(2006.01) (52) Cooperative Patent Classification (CPC): F01K 25/10; F01K 3/18 (86) International application number: PCT/US2023/018295 (87) International publication number: WO 2023/205013 (26.10.2023 Gazette 2023/43)

(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 ME MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA Designated Validation States: KH MA MD TN (30) Priority: 19.04.2022 US 202263363232 P (71) Applicant: Energy Vault, Inc. Westlake Village, CA 91361 (US)	(72) Inventors: PEDRETTI, Andrea Westlake Village, California 91361 (US) ALTWEGG, Peter Westlake Village, California 91361 (US) PFAMMATTER, Daniel, Roger Westlake Village, California 91361 (US) ESCHER, Patrick, Clemens Westlake Village, California 91361 (US) (74) Representative: Herrero & Asociados, S.L.  Edificio Aqua - Agustín de Foxá, 4-10 28036 Madrid 28036 Madrid (ES)