.~ Sectional guide or shaft having means to lock sections in angular relation while boring
DEFINITION
Classification: 175/74
(under subclass 73) Apparatus wherein the means for causing the tool to drill a curved bore comprises a tool shaft or a means adapted to direct the course of the tool which is made up of units or segments, generally pivotally connected to one another, movable to be positioned at an angle to one another in the direction of the bore axis and means engageable with the segments to hold them in their angularly related position.
SEE OR SEARCH THIS CLASS, SUBCLASS:
256, for releasable means normally holding joined shaft sections in angular relation.
SEE OR SEARCH CLASS
285, Pipe Joints or Couplings,
118, for knuckle type pipe joints with actuating means.
