US PATENT SUBCLASS 173 / 166
.~.~ With advance stopping means having selectively operable actuating mechanism

Current as of: June, 1999
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173 /   HD   TOOL DRIVING OR IMPACTING

213  DF  MEANS TO DRIVE TOOL ABOUT AN AXIS {7}
165  DF  .~ Relatively fixed drive for an advancing tool {2}
166.~.~ With advance stopping means having selectively operable actuating mechanism

DEFINITION

Classification: 173/166

(under subclass 165) Apparatus combined with a means which is selectively useable to prevent relative tool advance, said means including a motor or a relatively movable operating element to actuate the means into advance preventing condition.