Leading body for ground drilling and ground drilling machine
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United States of America Patent
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Jul 5, 2005
Grant Date -
Dec 11, 2003
app pub date -
Jun 2, 2003
filing date -
Jun 7, 2002
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A leading body for a ground drilling machine is provided which includes a main body which is tapered at a front end thereof to form a first sloped surface and a second sloped surface on opposite sides of the front end of the main body. A slant-cutting section extends from the main body substantially along the first sloped surface. And injection ports which are adapted to inject digging liquid are positioned in the slant-cutting section such that the injection ports inject digging liquid rearward with respect to a propelling direction of the leading body along an obtuse angle with respect to a rotation axis of the leading body and substantially along the second sloped surface.
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