Watch and crown used in this watch
US7591582B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 14, 2006 |
| Grant date | Sep 22, 2009 |
| Priority date | — |
| Expiry date | Dec 9, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04B3/043
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A watch is offered in which the life of the threadedly engaged portion between the stem pipe and the crown can be improved and which has an internal thread capable of being machined relative to the crown easily and accurately. The watch is based on a watch in which the crown is threadedly locked to a stem pipe mounted to a barrel. The stem pipe has a barrel outside protruding portion provided with an external thread. The crown has a crown shaft and a crown ring having an internal thread removably threaded to the external thread, the ring being connected to the crown shaft. The crown shaft has a barrel insertion cylindrical portion which is smaller in diameter than the crown ring and inserted in the stem pipe and a ring connection portion mounted integrally with this cylindrical portion and connected to one end portion of the crown ring.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.