Boring or penetrating the earth – With above-ground means to feed tool
Reexamination Certificate
1999-06-23
2001-04-17
Batson, Victor (Department: 3671)
Boring or penetrating the earth
With above-ground means to feed tool
C173S188000, C052S157000, C052S158000
Reexamination Certificate
active
06216803
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates generally to an anchor assembly for securing an object to a compressible material, and more particularly to an anchor assembly for securing a boring machine to the earth adjacent the boring site.
SUMMARY OF THE INVENTION
The present invention is directed to an anchor assembly for securing an object to a compressible material. The anchor assembly comprises a shaft having an upper and a lower portion and a helical assembly on the lower portion of the shaft. The helical assembly comprises a helical flight that renders the lower portion insertable into the compressible material by rotating the shaft in a first direction and axially advancing the shaft. The lower portion of the shaft is also thereby rendered removable from the compressible material by rotating the shaft in a second direction opposite the first direction and axially withdrawing the shaft. The helical assembly also includes a wing supported adjacent the lower portion of the shaft and movable between an extended position and a retracted position. The wing is helically aligned with the helical flight in both the extended position and the retracted position. The wing is connected so that, as the shaft is inserted into the compressible material, the wing is urged toward the retracted position. Likewise, as the shaft is rotated in the second direction, the wing is urged toward the extended position thereby expanding the outer diameter of the helical assembly.
Further, the present invention is directed to a boring machine comprising a frame and some means for advancing a drill string from the frame to form a borehole in the earth. The boring machine is equipped with the anchor assembly described above.
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Batson Victor
McKinney & Stringer, P.C.
The Charles Machine Works, Inc.
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