E - Fixed Constructions – 21 – F
Patent
E - Fixed Constructions
21
F
190/38, 116/66.1
E21F 17/16 (2006.01) B65G 3/00 (2006.01)
Patent
CA 1238493
ABSTRACT OF THE DISCLOSURE An aboveground reservoir is connected to the space between inner and outer tanks of an underground double-wall storage container for liquids. Leak detecting liquid fills the space between the tanks and extends to a surface level in the reservoir. Sensing means detects a drop in the level of the liquid in the reservoir and activates a signal when a leak develops in either of the inner and outer tanks.
494277
Clark John M.
Penland William R.
Pugnale Peter J.
Communications Research Laboratory Independent Administrative
G. Ronald Bell & Associates
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