Monocristalline type mineral stone equipped with a cone for centring a pivot, and manufacturing method thereof
US12386314B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 26, 2020 |
| Grant date | Aug 12, 2025 |
| Priority date | — |
| Expiry date | May 27, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04D3/0071
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method for manufacturing a stone for a timepiece from a mineral body of a monocrystalline type, the stone including a hole, includes ablating the body by scanning at least one face of the body with ultra-short pulse laser radiation from a laser for a duration less than one hundred picoseconds, and guiding a beam of the laser radiation using a precession system of at least three axes configured to at least partially cancel a conical focusing angle of the laser. The ablating includes digging of a cone of entrance to the hole. A mineral stone of monocrystalline type for a timepiece includes a face provided with a hole formed in a body of the stone, and a functional element at an entrance to the hole. The functional element has a shape of a cone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.