Boring or penetrating the earth – With above-ground means to advance or retract boring means
Reexamination Certificate
2006-06-06
2006-06-06
Tsay, Frank S. (Department: 3672)
Boring or penetrating the earth
With above-ground means to advance or retract boring means
C175S118000, C173S028000
Reexamination Certificate
active
07055630
ABSTRACT:
A truck mounted crane is equipped with an earth boring bit apparatus which can be attached to the end of a crane boom to excavate holes prior to the erection of signs or other elevated pole mounted structures. The earth boring bit apparatus includes a earth boring bit attachable to a gearbox which may include an extension shaft to permit its use on the crane. The crane also includes high capacity hydraulic lines suitable for actuating the earth boring bit, which also includes a drum for collecting earth as the hole is bored so that the crane can be used to remove the debris as part of the same operation in which the hole is bored.
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Pitts Robert W.
Tsay Frank S.
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