Triple walled lamp
US8008844B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 2, 2009 |
| Grant date | Aug 30, 2011 |
| Priority date | — |
| Expiry date | Oct 15, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J5/48
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A lamp in which an inner bulb containing a light emitting tube or a light emitting filament and an outer bulb containing the inner bulb are attached coaxially to a base, and a spacer made of a thin metal sheet is attached to an exhaust tube protruding from a central region at the top end of the inner bulb coaxially supporting the inner bulb to the outer bulb. The spacer has a central plate formed with an aperture allowing the exhaust tube to be inserted through the central plate, and a plurality of fingers protruding inward along the inner periphery of the aperture, and three or more strips, each branched radially outward from the central plate and formed in a curved shape coaxially supporting the inner bulb and the outer bulb.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.