US PATENT SUBCLASS 173 / 87
.~.~ Drive is oscillating cable drum

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

81  DF  MEANS TO CONTROL ADVANCE AND CYCLICALLY RECIPROCATE A CABLE-OPERATED HAMMER OR TOOL {5}
86  DF  .~ Relatively elevated guide engaging cable between drive and hammer or tool {2}
87.~.~ Drive is oscillating cable drum

DEFINITION

Classification: 173/87

(under subclass 86) Apparatus in which the means causing the cable or similar flexible element to reciprocate comprises a drum receiving plural turns of the cable, the drum being oscillated about an axis to cause the reciprocation.