.~.~ Movable means adapted to underlie severed core
DEFINITION
Classification: 175/240
(under subclass 239) Apparatus in which the movable means is adapted to admit the core of material to the core receiver, and then move to flow stopping position to block movement of the core toward bore bottom.
SEE OR SEARCH THIS CLASS, SUBCLASS:
233, for means movable to seal a sample receiver at bore bottom pressure.
249, for means movable relative to bit to retain or sever a core, but which, per se, are incapable of stopping downward flow of fine material.
