Hole forming tool

Details Hole forming tool Hole forming tool

2006-03-14

2006-03-14

Novosad, Christopher J. (Department: 3671)

Boring or penetrating the earth

Miscellaneous

C111S007300, C111S007400

Reexamination Certificate

active

07011168

ABSTRACT:
A hole forming tool is disclosed utilizing compressed gas discharged into a shaped shroud resulting in minimal disturbance to the surrounding ground.

REFERENCES:
patent: 1173355 (1916-02-01), Jones
patent: 3674100 (1972-07-01), Becker
patent: 3753408 (1973-08-01), Zimmerman
patent: 3916634 (1975-11-01), Woodruff
patent: 6231270 (2001-05-01), Cacossa
patent: 6457905 (2002-10-01), Nickell

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