Boring or penetrating the earth – Enlargement of existing pilot throughbore requiring...
Reexamination Certificate
1997-09-30
2001-06-26
Lillis, Eileen D. (Department: 3673)
Boring or penetrating the earth
Enlargement of existing pilot throughbore requiring...
C175S062000, C405S184000
Reexamination Certificate
active
06250403
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates generally to devices for enlarging bores and particularly to backreaming devices used in the horizontal boring industry. The present invention further relates to methods of enlarging a borehole and installing and constructing utility lines, pipe lines and the like.
SUMMARY OF THE INVENTION
The present invention is directed to a device for making or enlarging a bore. The device comprises an elongate body connectable to a source for moving the device through the bore and a plurality of blades, each blade defining a plane. The blades are supported on the body so that the planes of the blades intersect.
The present invention further is directed to a method for enlarging a bore using a boring machine adapted to bore a pilot bore in the earth from a point of entry to an exit point distant from the boring machine. The method comprises the steps of connecting an enlarging device to the distal end of the boring machine, the enlarging device comprising an elongate body connectable to a source for moving the device through the bore and a plurality of blades, each blade defining a plane, wherein the blades are supported on the body so that the planes of the blades intersect, and moving the enlarging device through the bore in a manner to enlarge the bore.
Finally the present invention is directed to a method for installing utility lines and the like by using a boring machine adapted to bore a pilot bore in the earth from a point of entry to an exit point distant from the boring machine. The method comprises the steps of connecting an enlarging device to the distal end of the boring machine, the enlarging device comprising an elongate body connectable to a source for moving the device through the bore and a plurality of blades, each blade defining a plane, wherein the blades are supported on the body so that the planes of the blades intersect, moving the enlarging device through the bore in a manner to enlarge the bore, and simultaneously pulling in the utility line into the bore while moving the enlarging device through the bore.
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Ditch Witch 4/40A (Jet Trac® Boring System), Issue No. 5/PL-8/96, 1993, pp. 801-171.
Lillis Eileen D.
McKinney & Stringer, P.C.
Singh Sunil
The Charles Machine Works, Inc.
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