Floating roof metallic shoe secondary seal

Details Floating roof metallic shoe secondary seal Floating roof metallic shoe secondary seal

B - Operations, Transporting

65

D

20/15.23

B65D 88/00 (2006.01) B65D 88/42 (2006.01) B65D 88/46 (2006.01) B65D 90/00 (2006.01)

Patent

CA 1067664

ABSTRACT OF THE DISCLOSURE In a liquid storage tank having a floating roof, a plurality of shoes adapted to slidably contact the inner side wall of the tank, and means supported by the roof for pressing the shoes against the inner side wall, and a fabric vapor harrier extending from the roof to the shoes, the im- provement comprising: an elastomeric strip, impermeable to vapor, in the form of an annulus connected at its bottom edge portion by an essentially vapor tight joint to the top circumference of the roof and with its top edge portion in movable sealing contact with the tank inner side wall above the top of the shoes, said strip being arced upwardly from the roof and movably supported intermediate its bottom and top edges by support means, mounted on the upper portion of the shoes, in contact with the lower surface of the elasto- meric strip.

300815

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