Hydraulic and earth engineering – Drainage or irrigation
Reexamination Certificate
2007-04-03
2007-04-03
Kreck, John (Department: 3673)
Hydraulic and earth engineering
Drainage or irrigation
C405S258100
Reexamination Certificate
active
10451309
ABSTRACT:
A system and a method for draining soft soil A bordered with soil B are disclosed. The system includes an airtight sheet10which covers the soft soil A to assist in vacuuming the soft soil A. The system further includes water gathering pipes13and a water drain tank16to receive water from the water gathering pipes13.The water gathering pipes13and the water drain tank16provide water passages and air passages separately so as to expedite the drainage operation.
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Evans P.A. Adams
Kreck John
Maruyama Kougyo Kabushikikaisha
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