US PATENT SUBCLASS 173 / 93.6
.~.~.~ Hammer head reciprocates along rotary axis

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

90  DF  IMPACTING DEVICES (E.G., HAMMERS) {19}
93  DF  .~ With anvil arranged to transmit torsional impact to tool {2}
93.5  DF  .~.~ Rotary tool drive having torque responsive impact {1}
93.6.~.~.~ Hammer head reciprocates along rotary axis

DEFINITION

Classification: 173/93.6

(under subclass 93.5) Apparatus in which the hammer head reciprocates on a line coincident with or parallel to the axis of rotation of the tool.