Grade-level enclosure for electrical apparatus
US4005253A · kind A · utility
Inventor
Key dates
| Filing date | May 14, 1975 |
| Grant date | Jan 25, 1977 |
| Priority date | — |
| Expiry date | May 14, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T292/1099
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A grade-level enclosure for transformers and other electrical apparatus used in utility electric distribution systems, comprising a hollow, open-ended concrete box adapted to be partially embedded in the ground and to extend above ground level, and an open-bottomed cover for the box, whereby to complete the enclosure for the electrical apparatus, special provisions being made for supporting the apparatus in the enclosure, ventilating the enclosure interior efficiently, but preventing the insertion of foreign objects through the ventilation openings, and rendering access for installation, maintenance and servicing of the equipment easy and convenient, while at the same time providing a high degree of security against tampering or entry by unauthorized persons, and a high degree of safety against electrical shock or other injury.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.