US PATENT SUBCLASS 173 / 148
.~ Tool advances relative to drive

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

141  DF  ADVANCE CAUSING OR CONTROLLING MEANS {6}
148.~ Tool advances relative to drive {3}
149  DF  .~.~> Advance means engageable with tool shaft at any point
150  DF  .~.~> Advance motor working member coaxial with tool shaft
151  DF  .~.~> Cable means controls advance

DEFINITION

Classification: 173/148

(under subclass 141) Apparatus in which the tool drive remains substantially axially fixed during operation while the tool axially moves forward relative thereto.