Watchcase having resilient snap-fit for rigid crystal
US4473305A · kind A · utility
1Cited by
3References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 18, 1982 |
| Grant date | Sep 25, 1984 |
| Priority date | — |
| Expiry date | May 18, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04B39/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A watchcase (1) comprises a flat crystal (3) of hard material held by pressure between elastically deformable opposite side walls (4) of a recess (5) formed at the top of the body (2) of the watchcase. The bottom face (8) of the crystal (3) compresses a seal (9) arranged around the opening of the body. The restoring force exerted on the bevel of the crystal by the facing surface of the walls (4) as well as the rigidity of the crystal make it possible to make tightly sealed watchcases in which the crystal is held on the body over a portion of its margins only.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.