Liquid storage tank with floating roof structure
In a cylindrical wall storage tank for containing a liquid, said tank is described having a floor, a floatable roof supportable by said contained liquid, said roof including a peripheral seal for engaging the cylindrical wall to maintain a fluid-tight sliding seal therewith, and support means associated with said roof including, the improvement in said tank of, at least one cylindrical guide sleeve extending downwardly from said floatable roof; a shoe depending laterally from said at least one cylindrical guide sleeve's lower end for engaging the tank floor when the level of contained liquid is insufficient to support said floatable roof, said shoe having means forming a passage there through to register a support column and, an elongated support column removably positioned in said at least one cylindrical guide sleeve, of being sufficient length to extend downward beyond the shoe to engage the tank floor, whereby to sustain the floatable roof a predetermined distance above said floor after the contained liquid has drained from the tank.
- Assignee:
- Texaco Inc., White Plains, NY (United States)
- Patent Number(s):
- A; US 5230436
- Application Number:
- PPN: US 7-890202
- OSTI ID:
- 6323713
- Country of Publication:
- United States
- Language:
- English
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