(under the class definition) Apparatus in which the tool drive means is adjustably connected to a substantially fixed structure (e.g., support), and means are provided to hold the tool drive means in different positions relative to the fixed structure to provide plural selective positions of the axis along which the driven tool moves forward into the work.
SEE OR SEARCH CLASS
299, Mining or In Situ Disintegration of Hard Material,
29+, for a hard material disintegrating machine having means to adjustably manipulate a chain cutter or the like.
