US 4,397,399 AGranted

Seal for floating roofs of storage tanks

AssigneeTank Services, Incorporated

InventorRobert B. Wagoner

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Abstract

A sealing assembly comprising a flexible shield having one end rigidly connected to an upper rim portion of a floating roof movably disposed within a storage tank and having the opposite end thereof extending upwardly and outwardly toward the inner periphery of the tank, a flexible wiper blade connected to the outwardly extending end of the shield for engaging the inner surface of the tank wall, the combined shield and wiper blade being of a length greater than the average width of the rim space for assuring an efficient sealing engagement of the wiper blade with the inner periphery of the tank wall even during lateral movement of the floating roof within the tank, and a yieldable film or sheet interposed between the shield and the rim of the roof for assuring an efficient seal therebetween.

Claims9

Dependent claims

Seal means for the rim space of a floating roof movably disposed within a storage tank and comprising flexible shield means having one end rigidly secured to the upper portion of the roof, wiper blade means provided at the opposite end of the shield means and engagable with the inner periphery of the storage tank to provide a seal therebetween, sealing liner means interposed between the shield means and the upper portion of the roof for precluding leakage therebetween, static drain means secured to the shield means and continuously engaged directly between the inner periphery of the storage tank and floating roof for passing any accumulated static electricity from the storage tank to the roof, the sealing liner means comprising yieldable sheet means disposed against and covering one face of the shield means and interposed between the shield means and roof for providing the sealing therebetween.

Dependencies are inferred from the claim text.