US PATENT SUBCLASS 175 / 247
.~.~ With fluid pressure-responsive means to remove receiver or operate latch

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


175 /   HD   BORING OR PENETRATING THE EARTH

244  DF  WITH MEANS MOVABLE RELATIVE TO TOOL TO RECEIVE, RETAIN, OR SEVER UNDISTURBED CORE {3}
246  DF  .~ Receiver removable through below-ground tool shaft {2}
247.~.~ With fluid pressure-responsive means to remove receiver or operate latch

DEFINITION

Classification: 175/247

(under subclass 246) Apparatus in which (1) a fluid pressure operated means or surface is provided to move a core receiver toward above ground or (2) a means latching the core barrel in the tool shaft is actuated to engaged or released position by fluid pressure.

SEE OR SEARCH THIS CLASS, SUBCLASS:

60, for a process of transporting a sample to the surface by fluid.

99, and the subclasses there noted for other pressure fluid operated devices.