High performance EMC vent panel
US6297446A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 26, 1999 |
| Grant date | Oct 2, 2001 |
| Priority date | — |
| Expiry date | Feb 26, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K9/0041
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The inventive EM panel comprises multiple layers of perforated metal sheets that are electrically connected with each other. Since multiple sheets are used, the holes can be larger than in a single sheet shield, as attenuation improvements from increased panel thickness can be traded for attenuation reductions from increased hole size. The metal sheets are perforated with equal-sized holes in a common pattern. The metal sheets are arranged in a stack such that the equal-sized holes have co-located centers. Also the holes of each sheet are lined up such that air enters the panel through the side of the panel with beveled holes. The bevel is formed from the punch used to make the holes. This prevents dust from clogging the panel. The sheets of the panel are electrically connected at the periphery of the sheets via a rivets or a gasket.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.