(under subclass 20) Apparatus in which the device comprises relatively movable elements, and an inclined face on one element cooperates with a face on another element to generate expansive pressure.
SEE OR SEARCH CLASS
166, Wells,
217, and the subclasses there noted for a wedge operated expanding anchor.
254, Implements or Apparatus for Applying Pushing or Pulling Force,
104, for a wedge type pushing device of general utility.
411, Expanded, Threaded, Driven, Headed, Tool-Deformed or Lock-Threaded Fastener, 15+, for expanding core and sleeve type fasteners.
