Watch having a case formed at least partially from a hard material
US4956830A · kind A · utility
18Cited by
4References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 26, 1987 |
| Grant date | Sep 11, 1990 |
| Priority date | — |
| Expiry date | Oct 26, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04B37/10
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The setting stem 27 of a watch is engaged in a radial hole 29 of an inner metallic caseband 16 with a packing 31 to assure fluid tightness. An outer caseband 3 of hard material includes a radial hole 28 aligned with the hole in the inner caseband. A crown 32 of the same material as the outer caseband may cap the stem. This arrangement enables uniting the wear resistant properties of the hard material with good fluid tightness of the stem.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.