US PATENT SUBCLASS 175 / 76
.~ Axially spaced opposed bore wall engaging guides

Current as of: June, 1999
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175 /   HD   BORING OR PENETRATING THE EARTH

73  DF  MEANS TRAVELING WITH TOOL TO CONSTRAIN TOOL TO BORE ALONG CURVED PATH {3}
76.~ Axially spaced opposed bore wall engaging guides

DEFINITION

Classification: 175/76

(under subclass 73) Apparatus wherein the means for causing the tool to drill a curved bore comprises means carried by the tool or tool shaft at points axially spaced along the bore axis and extending in opposite directions laterally from the tool or tool shaft to engage the bore wall.

(1) Note. One of the bore wall engaging means may comprise an annular means surrounding the tool or tool shaft.