Plastic electrical box for installation in poured concrete
US5420376A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 6, 1993 |
| Grant date | May 30, 1995 |
| Priority date | — |
| Expiry date | Aug 6, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02G3/20
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electrical box assembly for installation in a poured concrete building partition, such as a ceiling, comprises a base ring member including a ring body having a central through opening and radially extending mounting tabs for permitting the base ring member to be joined to a form over which concrete is to be poured during forming of the building partition. The base ring member further includes an upper edge surrounding the through opening with connection portions lying radially outwardly of the upper edge. A box cover member is provided for connection to the base ring and terminates in a lower edge with a laterally extending shoulder receiving the upper edge of the base ring member. The box cover member further includes releasable connectors joined with the connecting portions on the base ring member for maintaining the box cover member in engagement with the base ring member. Selectively removable knockout portions are provided in the cover member for allowing connecting of the conduit therewith.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.