• Patent Title: METHOD OF MANUFACTURING A TIMEPIECE SHAFT
  • Application No.: US17877578
    Application Date: 2022-07-29
  • Publication No.: US20220373977A1
    Publication Date: 2022-11-24
  • Inventor: Vannina Linck
  • Applicant: ROLEX SA
  • Applicant Address: CH Geneva
  • Assignee: ROLEX SA
  • Current Assignee: ROLEX SA
  • Current Assignee Address: CH Geneva
  • Priority: EP16174244.0 20160613
  • Main IPC: G04D3/00
  • IPC: G04D3/00 G04B13/02 G04B17/06
METHOD OF MANUFACTURING A TIMEPIECE SHAFT
Abstract:
The method of manufacturing a timepiece shaft (1) includes grinding a ceramic piece, especially to form a balance shaft (1), having a functional portion (2a; 2b) including at least one part (221a; 221b) of a pivot-shank (22a; 22b) and/or at least one part (211a; 211b) of a pivot (21a; 21b), the first functional portion being made of ceramic and a first outer diameter (D1) of the first functional portion being less than 0.5 mm, or less than 0.4 mm, or less than 0.2 mm, or less than 0.1 mm.
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