(under subclass 456) Apparatus also combined with a polymeric or rubberlike substance having elastic properties adapted to provide a frictional retention force.
SEE OR SEARCH CLASS
299, Mining or In Situ Disintegration of Hard Material,
107, for a tooth mounting means having a resiliently biased retaining means.
411, Expanded, Threaded, Driven, Headed, Tool-Deformed, or Locked-Threaded Fastener,
512, for a fastener securing element having an elastomeric material.. [figure] [caption]A - Adaptor; B - Tooth; C - Tooth digging edge; D - Adaptor noise; E - Aligned openings; F - Resilient member; G - Pin or key