Tool driving or impacting – Automatic control of power operated means – Tool advance causing or controlling means
Reexamination Certificate
2005-11-01
2005-11-01
Smith, Scott A. (Department: 3721)
Tool driving or impacting
Automatic control of power operated means
Tool advance causing or controlling means
C173S152000, C175S057000
Reexamination Certificate
active
06959770
ABSTRACT:
A drilling apparatus for drilling underground, small diameter bore holes wherein a support frame of the apparatus is formed in part by a pair of hydraulic cylinders arranged parallel one to another. A head mounting plate that carries the drill motor is releaseably attached to a barrel portion of each hydraulic cylinder and the barrel portion is urged by fluid pressure along a support rod extending axially through the barrel. The ends of the support rods are attached by front and rear supports to form a frame that is anchored in position relative to the movable barrel.
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Aceto, Esq. Roger
Dynadrill, Inc.
Harter Secrest & Emery LLP
Salai Esq. Stephen B.
Smith Scott A.
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