Drop-proof and dust-proof device in rotary operation section of camera
US4440403A · kind A · utility
6Cited by
7References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 17, 1978 |
| Grant date | Apr 3, 1984 |
| Priority date | — |
| Expiry date | May 17, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B17/08
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Eccentricity between an external knob and camera casing is accommodated by providing a flexible rubber ring between the two which will bend during a change in their relative positions so that a good seal is continuously maintained. Sealing can also be enhanced by extending the rubber gripping ring around the circumference of the knob down to the camera casing so that the sealing and operating rings are integral.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.