Hydraulic and earth engineering – Fluid control – treatment – or containment – Flow control
Reexamination Certificate
2006-01-31
2006-01-31
Lee, Jong-Suk (James) (Department: 3673)
Hydraulic and earth engineering
Fluid control, treatment, or containment
Flow control
C405S121000, C210S747300
Reexamination Certificate
active
06991404
ABSTRACT:
A closed modular ditch liner includes a plurality of closed liner sections, a plurality of covers, and at least one alignment key. The cross section of each closed liner section includes at least one trough contour and a single cover retention lip formed on a top end of each side thereof. Each cover is laterally retained between the two cover retention lips. A key slot is preferably formed on at least one side of the closed liner section to receive a single alignment key. However, alignment keys that do not require a key slot may also be used.
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Ersler Donald J.
Lee Jong-Suk (James)
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