Method for operation to excavate underdrain in the field ground and a device for operation to excavate underdrain
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United States of America Patent
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-
Aug 3, 1999
Grant Date -
N/A
app pub date -
Oct 23, 1997
filing date -
Dec 26, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method of operation to effectively excavate an underdrain in the field ground having a long service life and ensuring that the underdrain will not be closed after a long period of time and a device for such operation. The method includes attaching a plurality of buckets to an endless chain, driving the endless chain to excavate a slit in the field ground, reforming inner side walls of the slit by a reformer, pressing soil from both sides of the slit later ally inwardly by a pressing member attached to the reformer to form a block to separate the slit into an upper space and a Iover space, and charging the upper space with discarded dirt.
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