(under the class definition) Apparatus in which (1) a single cutting means rotating through recurring cycles, or (2) a combination of cutting means carried on a common support and including at least one cutting means rotating through recurring cycles, is particularly adapted to form in a single advance a bore which is noncircular in a plane perpendicular to the bore axis.
(1) Note. Included in this subclass, for example, are a pair of rotating cutters forming a pair of overlapping,
circular bores.
SEE OR SEARCH THIS CLASS, SUBCLASS:
89+, for cutters carried on a flexible or articulated member and adapted to form a noncircular bore.
108, for common drive or advancing means for concurrently boring along laterally spaced axes.
SEE OR SEARCH CLASS 125, Stone Working,
12+, for stone saws.
299, Mining or In Situ Disintegration of Hard Material,
29+, for a mining machine which may include a rotary cutter and form a noncircular opening and subclasses 79.1+ for a cutter which may be rotary and adapted to form a noncircular opening.
408, Cutting by Use of Rotating Axially Moving Tool,
30, for woodworking augers or cutting square holes.
