Boring or penetrating the earth – With above-ground means for handling drilling fluid or cutting – Fluid or cuttings directing or receiving means engaging bore...
Reexamination Certificate
2011-01-04
2011-01-04
Dang, Hoang (Department: 3672)
Boring or penetrating the earth
With above-ground means for handling drilling fluid or cutting
Fluid or cuttings directing or receiving means engaging bore...
C175S084000, C175S210000
Reexamination Certificate
active
07861803
ABSTRACT:
The invention relates to auxiliary working apparatus (10) for use with drilling apparatus for drilling holes into the ground and where the drilling apparatus has a platform supported by a support structure (50) thereof through which a drill bit (30) passes, the platform serving as a barrier between chippings blown from a hole being drilled into the ground and the drill motor and drill bit displacement mechanism of the drilling apparatus. The auxiliary working apparatus includes a roller-type brush (20) arrangement that, in its operative configuration, is mounted beneath the platform and that is operable for displacing chippings blown from a hole being drilled into the ground to spaced locations from the hole.
REFERENCES:
patent: 3498674 (1970-03-01), Matthews
patent: 3800890 (1974-04-01), Gyongyosi et al.
patent: 4100982 (1978-07-01), Wilkinson et al.
patent: 4429754 (1984-02-01), Cormier
patent: 4440243 (1984-04-01), Howeth
Dang Hoang
Ladas & Parry LLP
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