(19)

(11)

EP 3 804 074 A1

(12)

(43) Date of publication: 14.04.2021 Bulletin 2021/15 (21) Application number: 19815009.6 (22) Date of filing: 10.04.2019

(51) International Patent Classification (IPC):  H02J 3/46(2006.01) H02J 3/00(2006.01) H02J 3/38(2006.01) H02J 3/32(2006.01) (86) International application number: PCT/US2019/026743 (87) International publication number: WO 2019/236193 (12.12.2019 Gazette 2019/50)

(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: 04.06.2018 US 201815997133 (71) Applicant: Wellhead Power Solutions, LLC Sacramento, CA 95811 (US)	(72) Inventors: MCDANIEL, John Grant Sacramento, CA 95811 (US) DITTMER, Harold Edwin Sacramento, CA 95811 (US) (74) Representative: Dehns  St. Bride's House 10 Salisbury Square London EC4Y 8JD London EC4Y 8JD (GB)