Steerable boring machine
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United States of America Patent
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-
Jul 20, 1999
Grant Date -
N/A
app pub date -
May 21, 1997
filing date -
May 21, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
With a boring machine having a multistrand rod assembly (3) for producing boreholes in the ground, comprising a rotatable inner rod (29), an outer rod (19), at least one steering and digging tool (5; 33, 35, 36) driven by the inner rod and having an axis of rotation (22) inclined at an angle of for example 90.degree. to the axis of the rod (23), and a linear drive for the rod assembly (3, 19, 20), it is possible to perform both straight-ahead boring and, if only the steering and digging tool is driven, curve boring.
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