(19)

(11)

EP 4 816 708 A1

(12)

(43) Date of publication: 07.10.2026 Bulletin 2026/41 (21) Application number: 24898792.7 (22) Date of filing: 27.11.2024

(51) International Patent Classification (IPC):  F16F 1/06(2006.01) F16F 1/18(2006.01) F16F 1/04(2006.01) F16F 1/02(2006.01) (52) Cooperative Patent Classification (CPC): F16F 1/328; B21F 35/04 (86) International application number: PCT/US2024/057814 (87) International publication number: WO 2025/117791 (05.06.2025 Gazette 2025/23)

(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: 27.11.2023 US 202363602864 P (71) Applicant: Smalley Steel Ring Company Lake Zurich, IL 60047 (US)	(72) Inventor: ZABINSKI, Walter Lake Zurich, Illinois 60047 (US) (74) Representative: Harden, Henry Simon  Kilburn & Strode LLP Lacon London 84 Theobalds Road London WC1X 8NL London WC1X 8NL (GB)