Sharpener and a lighting fixture
US10458621B2 · kind B2 · utility
1Cited by
3References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 8, 2016 |
| Grant date | Oct 29, 2019 |
| Priority date | — |
| Expiry date | Apr 8, 2036 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21V7/0025
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A sharpener comprises a cylindrical inner louver portion and a cylindrical outer louver portion each disposed concentrically about an axis that extends forward from a center of a light-emitting surface. Respective back ends of the inner louver portion and the outer louver portion are disposed nearer to the light-emitting surface, and respective front ends and are disposed farther from the light-emitting surface, and the front end of the inner louver portion is disposed nearer to the light-emitting surface than the front end of the outer louver portion is.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.