(19)

(11)

EP 4 739 879 A1

(12)

(43) Date of publication: 13.05.2026 Bulletin 2026/20 (21) Application number: 24840335.4 (22) Date of filing: 05.07.2024

(51) International Patent Classification (IPC):  E21B 19/16(2006.01) B25B 13/50(2006.01) E21B 7/02(2006.01) B62D 33/06(2006.01) (52) Cooperative Patent Classification (CPC): E21B 19/161 (86) International application number: PCT/US2024/036921 (87) International publication number: WO 2025/014815 (16.01.2025 Gazette 2025/03)

(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: GE KH MA MD TN (30) Priority: 07.07.2023 US 202363512561 P (71) Applicant: Joy Global Surface Mining Inc Milwaukee, Wisconsin 53204 (US)	(72) Inventors: FOUST, Zachary Fort Worth, Texas 76104 (US) REGGIATORE, Aaron Twisp, Washington 98856 (US) OFTEDAHL, Kristofor Big Bend, Wisconsin 53103 (US) WALGREN, Timothy Paul Dousman, Wisconsin 53118 (US) (74) Representative: Appleyard Lees IP LLP  G Mill Dean Clough Industrial Park Halifax HX3 5AH Halifax HX3 5AH (GB)