(under subclass 592) Devices comprising an elevator in the form of a bucket, skip, box, or similar container having movable means thereon for providing an opening or passageway through which the load may discharge by gravity.
SEE OR SEARCH THIS CLASS, SUBCLASS:
616, for similar devices combined with movable external loading or unloading means.
644, for a tiltable carrier having a controllable discharge.
SEE OR SEARCH CLASS
166, Wells,
69, for well heads combined with a receptacle for insertion into the well, and subclasses 162+ and subclasses there noted for valved well receptacles.
294, Handling: Hand and Hoist-Line Implements, 68.22+, for hoist-line buckets including valved type.
