Water-resisting structure for a watch
US4479724A · kind A · utility
8Cited by
3References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 22, 1983 |
| Grant date | Oct 30, 1984 |
| Priority date | — |
| Expiry date | Aug 22, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04B39/02
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A water-resistant device for a watchcase of a diver's watch having a case body, a back and a glass. The device comprises an O-ring for sealing the watchcase, an annular leaf spring having an elasticity in the axial direction of the watchcase, and a bezel for the glass for compressing the leaf spring so as to urge the glass to the O-ring for maintaining watertightness of the watchcase. The O-ring and leaf spring are such that when the glass is moved by the difference between the pressure in the watchcase and atmospheric pressure, gases in the watchcase leak out through a gap formed by the movement of the glass.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.