US PATENT SUBCLASS 175 / 325.6
.~.~.~ Held by a fastener parallel to shaft axis
Current as of:
June, 1999
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175 /
HD
BORING OR PENETRATING THE EARTH
320
DF
WITH TOOL SHAFT DETAIL
{4}
325.1
DF
.~ Shaft carried guide or protector {3}
325.5
DF
.~.~ Surrounding existing shaft section {2}
325.6
.~.~.~ Held by a fastener parallel to shaft axis
DEFINITION
Classification: 175/325.6
Held by a fastener parallel to shaft axis:
(under subclass 325.5) Apparatus where the guide or protector means encircles and is fixed to the shaft by a securing means having a longitudinal axis equidistant to the longitudinal axis of the tool shaft.