US PATENT SUBCLASS 175 / 114
.~ Constant rotation rate permitted regardless of (1) release of feed force, or (2) change in feed rate

Current as of: June, 1999
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175 /   HD   BORING OR PENETRATING THE EARTH

113  DF  WITH MEANS TO SIMULTANEOUSLY FEED AND ROTATE TOOL FROM A SINGLE MECHANICAL ELEMENT {3}
114.~ Constant rotation rate permitted regardless of (1) release of feed force, or (2) change in feed rate

DEFINITION

Classification: 175/114

(under subclass 113) Apparatus in which the mechanical movement, or means coupling the mechanical movement to the rotary drive and/or feed is adapted to rotate the tool at a uniform speed while permitting (1) complete disconnection of the feed drive or (2) a change in the speed at which the tool is being fed into the work.

SEE OR SEARCH THIS CLASS, SUBCLASS:

27, for automatic control of tool advance.