US PATENT SUBCLASS 173 / 6
.~.~.~ With additional control by means sensing condition of advance means

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

2  DF  AUTOMATIC CONTROL OF POWER OPERATED MEANS {4}
4  DF  .~ Tool advance causing or controlling means {2}
5  DF  .~.~ Responsive to torque or speed condition of drive {3}
6.~.~.~ With additional control by means sensing condition of advance means

DEFINITION

Classification: 173/6

(under subclass 5) Apparatus in which the sensing means includes a means to also sense the condition of the means which causes or controls forward movement of the tool.