Boring or penetrating the earth – With below-ground tool drive prime mover – With means to anchor prime movers support to bore wall
Reexamination Certificate
2005-10-18
2005-10-18
Kreck, John (Department: 3673)
Boring or penetrating the earth
With below-ground tool drive prime mover
With means to anchor prime movers support to bore wall
C175S099000, C175S230000, C299S031000, C405S249000
Reexamination Certificate
active
06955232
ABSTRACT:
The invention relates to equipment for drilling a vertical borehole in hard ground, the equipment comprising:casing put successively into place in the borehole;a drilling machine having a rotary cutting head and presenting a structural frame;torque and thrust transmission means having a first end secured to the structural frame of the drilling machine; andsecuring means for securing the second end of the torque and thrust transmission means in translation and in rotation to said casing.
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Compagnie du Sol
Kreck John
Merchant & Gould P.C.
The Robbins Company
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