(19)

(11)

EP 3 953 584 A1

(12)

(43) Date of publication: 16.02.2022 Bulletin 2022/07 (21) Application number: 19725600.1 (22) Date of filing: 09.05.2019

(51) International Patent Classification (IPC):  F04B 39/10(2006.01) F04B 39/14(2006.01) (52) Cooperative Patent Classification (CPC): F04B 39/1013; F04B 39/1066; F04B 39/14 (86) International application number: PCT/US2019/031557 (87) International publication number: WO 2020/226657 (12.11.2020 Gazette 2020/46)

(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 (71) Applicant: Dresser-Rand Company Houston TX 77079 (US)	(72) Inventor: SANFORD, Joel T. Bath, NY 14810 (US) (74) Representative: Horn Kleimann Waitzhofer Patentanwälte PartG mbB  Ganghoferstrasse 29a 80339 München 80339 München (DE)