Back to results
US 2024/0295853 A1Published application
Timepiece shaft
AssigneeRolex SA
InventorVannina Linck
Life of this patent
Estimating the term…
Abstract
A timepiece shaft (1), especially a balance shaft (1), comprising a first 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.
Claims23
A timepiece shaft, comprising:
- a first functional portion including at least a tribological part of a pivot, a first outer diameter of the first functional portion being less than 0.5 mm, and
- a second functional portion, which is a toothed wheel,
- wherein the first functional portion and the second functional portion are made entirely in a same homogeneous ceramic material,
- wherein a surface of the first functional portion is a tribological surface having a hardness in a range of 1100-1600 HV1,
- wherein the tribological surface is obtained without having subjected the first functional portion to a heat treatment nor rolling.
2 more elements
Dependencies are inferred from the claim text.