US PATENT SUBCLASS 173 / 98
.~.~ Hammer head moves out of arcuate or rotary path

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

90  DF  IMPACTING DEVICES (E.G., HAMMERS) {19}
94  DF  .~ Hammer head moves in arcuate path or rotates {3}
98.~.~ Hammer head moves out of arcuate or rotary path {1}
99  DF  .~.~.~> Movement out of path is about rotating pivot

DEFINITION

Classification: 173/98

(under subclass 94) Apparatus including means for permitting or causing the hammer to detour from the path generated about an axis, this movement being usually for permitting the hammer to clear the tool or anvil after the delivery of a blow thereto.