Light fixture for use in hazardous environments having adapter ring for alternative ballast housing
US5477442A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 4, 1992 |
| Grant date | Dec 19, 1995 |
| Priority date | — |
| Expiry date | Dec 4, 2012 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21V23/02
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A lighting fixture for use in hazardous locations and adverse environments, includes a mounting plate and a first ballast housing. A second non-interchangeable ballast housing may be alternately employed by use of an adapter ring removably securable intermediate the mounting plate and the second ballast housing. The adapter ring comprises a top portion specially adapted to engage the mounting plate, with first fastening means associated therewith, and a bottom portion specially adapted to engage the second ballast housing, with second fastening means being associated therewith. The adapter ring allows the replacement of the first ballast housing with the second, wherein the first and second ballast housings are not identical and are produced by different manufacturers. The adaptor ring effectively seals the interfaces with the mounting plate and second ballast housing, thereby maintaining the integrity of the lighting fixture for its intended purpose.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.