Collapsible light diffusing device and diffused lighting apparatus
US6519089B2 · kind B2 · utility
Inventor
Key dates
| Filing date | May 16, 2000 |
| Grant date | Feb 11, 2003 |
| Priority date | — |
| Expiry date | May 16, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21W2131/406
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A collapsible light diffusing device includes a collapsible housing having a folded and an unfolded condition. The housing in the unfolded condition defines a first aperture and a second aperture, the second aperture being larger than the first aperture. The housing is adapted to be mounted to a light source such that the first aperture is nearer to the light source than the second aperture. The device further includes a flexible light diffusing member adapted to cover the second aperture when the housing is in the unfolded condition. The housing includes a plurality of substantially rigid panels of heat resistant material, hinged together to enable the housing to be manipulated between the folded and unfolded conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.