US PATENT SUBCLASS 175 / 244
WITH MEANS MOVABLE RELATIVE TO TOOL TO RECEIVE, RETAIN, OR SEVER UNDISTURBED CORE

Current as of: June, 1999
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175 /   HD   BORING OR PENETRATING THE EARTH

244WITH MEANS MOVABLE RELATIVE TO TOOL TO RECEIVE, RETAIN, OR SEVER UNDISTURBED CORE {3}
245  DF  .~> Core bit closure relative upwardly movable by core
246  DF  .~> Receiver removable through below-ground tool shaft {2}
249  DF  .~> Core-retaining or severing means {5}

DEFINITION

Classification: 175/244

(under the class definition) Apparatus including a means which, during normal operation, is displaceable or rotatable relative to the working face of a tool, said means being adapted to have physical contact with a core of material such as is formed by a core type bit to (1) accommodate the core as it is formed, (2) grasp the core after it is formed, or (3) cut or break the already formed core from the formation.

SEE OR SEARCH THIS CLASS, SUBCLASS:

3, for core severing by explosive means.

44, for a core receiver provided with means to mark the core while being taken for the purpose of orienting the core to its original position while in situ.

46, for a core receiver provided with means to signal or indicate a condition of the core being taken relative to the receiver.

239+, for means movable in tool or tool shaft to stop flow toward bore bottom, combined with an undisturbed sample receiver. 403+, and the search there noted for core forming type bits.

SEE OR SEARCH CLASS

299, Mining or In Situ Disintegration of Hard Material,

63, for a mining machine having an endless loop chunk severing cutter.