Secondary seal for floating roof storage tank

Details Secondary seal for floating roof storage tank Secondary seal for floating roof storage tank

1980-05-21

1981-09-08

Hall, George T.

Receptacles

Closures

Floating closure

B65D 8842

Patent

active

042879990

ABSTRACT:
A floating roof storage tank having an upstanding tank shell for containing liquid to be stored and having therein a floating roof floating on the surface of the stored liquid, a metal shoe carried by the floating roof and extending around the tank shell, a primary seal interconnecting the floating roof and the metal shoe, a plurality of seal support members shiftably mounted upon the metal shoe at the upper end thereof, a secondary seal extending between the upper rim of the floating roof and the seal support members and beyond the seal support members and against the inner surface of the tank shell; the seal support members are shiftable away from the tank shell a distance to permit inspection of the primary seal therebelow; limit structure acting between the metal shoe and the seal support members limit movement thereof to prevent the seal support members from contacting the tank shell.

REFERENCES:
patent: 2427171 (1947-09-01), Wiggins
patent: 2540801 (1951-02-01), Wiggins
patent: 2540802 (1951-02-01), Wiggins
patent: 2754026 (1956-07-01), Wiggins
patent: 3595432 (1971-07-01), Heijden
patent: 4004708 (1977-01-01), Boyd

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