Grounding system for floating roofs in flammable storage tanks
US7078621B1 · kind B1 · utility
8Cited by
7References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 25, 2001 |
| Grant date | Jul 18, 2006 |
| Priority date | — |
| Expiry date | Apr 13, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02G11/02
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Lightning at or near the site of an oil storage tank can cause a charge build up in the tank. This charge must be discharged to ground at rapid speeds to prevent arcing, sparks and fire. The tank has a metal floating roof which can be used to discharge the charge to ground by connecting a low impedance braided wire to the floating roof, and then connecting the wire to a take up reel at the top rim of the tank. The take up reel keeps any slack out of the wire. The path to ground is liquid to floating roof, to braided wire, to take up reel, to wall of tank, to earth ground.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.