Ventilating battery cover
US6828500B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 21, 2003 |
| Grant date | Dec 7, 2004 |
| Priority date | — |
| Expiry date | Jan 21, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K5/0215
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
At least one side wall area of a casing, suitable for small electronic devices such as hearing aid devices e.g. for the use in environment with elevated humidity, is proposed to be porous or perforated. On the outside surface of the casing a fleece is arranged on the said side wall area, which fleece does have a higher porosity or pores with a smaller diameter respectively than the pores or openings within the said side wall area of the casing. The side wall area can be e.g. a cover or lid respectively, which is covered on its outer surface with the said fleece. The fleece preferably is a “non-woven” consisting of polymer fibers such as e.g. polyester fibers. The casing cover or lid respectively can be e.g. a cover of a receptacle for batteries.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.