Floating roof penetrations with reduced vapor space seal

Details Floating roof penetrations with reduced vapor space seal Floating roof penetrations with reduced vapor space seal

1979-07-02

1981-01-06

Pollard, Steven M.

Receptacles

Closures

Floating closure

220221, B65D 8718

Patent

active

042431514

ABSTRACT:
An improvement in a storage tank for a liquid having a floating roof and at least one stationary vertical member penetrating the floating roof through a well defined by an opening therein surrounded by a well wall partially in and partially above the level of a liquid stored in the tank, with the improvement being a vapor seal, covering the area between the vertical member and the well wall, positioned about at but above the liquid level in the well to thereby reduce the space in which vapor from the liquid can first accumulate and then be dispersed with vertical movement of the floating roof.

REFERENCES:
patent: 1650340 (1927-11-01), Glass
patent: 1674038 (1928-06-01), Glass
patent: 3307733 (1967-03-01), DeBock
patent: 3366266 (1968-01-01), Heartstedt
patent: 3375951 (1968-04-01), Donald
patent: 3493143 (1970-02-01), Thompson et al.
patent: 3583594 (1971-06-01), Belanger et al.
patent: 4014454 (1977-03-01), Nayler et al.
patent: 4173291 (1979-11-01), Hills

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