Hydraulic and earth engineering – Fluid control – treatment – or containment – Flow control
Reexamination Certificate
2006-11-22
2009-11-10
Lagman, Frederick L (Department: 3672)
Hydraulic and earth engineering
Fluid control, treatment, or containment
Flow control
C405S109000
Reexamination Certificate
active
07614826
ABSTRACT:
A sheathing of elastically deformable waterproofing sheet material (11) is applied and sealingly secured to a surface area of a hydraulic structure (10; 31; 36, 39) to be protected. The seeped water, which collects behind the waterproof sheathing (11), is discharged by gravity through one-way drainage valves (13), provided in pre-established drainage positions of the waterproof sheathing (11); the drainage valves (13) are automatically opened and closed by the differential pressure of the water acting on opposite faces of a flexible sheet like flat valving member (M) of the drainage valve (13).
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GSI B.V.
Lagman Frederick L
Young & Thompson
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