Telescopable boring rod mechanism

Details Telescopable boring rod mechanism Telescopable boring rod mechanism

2007-01-16

2007-01-16

Thompson, Kenneth (Department: 3672)

Boring or penetrating the earth

With tool shaft detail

C175S321000

Reexamination Certificate

active

10773449

ABSTRACT:
The invention relates to a telescopable boring rod mechanism with at least two mutually displaceable Kelly rods, which are equipped with means for transmitting a torque to the adjacent Kelly rod. At least one of the Kelly rods is constructed from at least two rod segments, which are made from a different material.

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