Grounding system for floating roofs in flammable storage tanks

Details Grounding system for floating roofs in flammable storage tanks Grounding system for floating roofs in flammable storage tanks

2006-07-18

2006-07-18

Patel, Dhiru R. (Department: 2831)

Electricity: conductors and insulators

Boxes and housings

With grounding means

C174S059000, C174S060000, C174S0400CC, C439S098000

Reexamination Certificate

active

07078621

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.

REFERENCES:
patent: 3453493 (1969-07-01), Godwin, Jr.
patent: 3887254 (1975-06-01), Landis et al.
patent: 3942674 (1976-03-01), Nelson
patent: 4806937 (1989-02-01), Peil
patent: 4940859 (1990-07-01), Peterson
patent: 5159523 (1992-10-01), Claassen et al.
patent: 6127934 (2000-10-01), Powell et al.
Prior sale of earlier and differnet test model in Israel on or about Jul. 28, 1999. (Not prior art act under 102).

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