Closed modular ditch liners
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United States of America Patent
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Jan 31, 2006
Issued Date -
N/A
app pub date -
Aug 12, 2004
filing date -
Sep 17, 2002
priority date (Note) -
Expired
status (Latency Note)
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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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