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Class Information
Number: 175/252
Name: Boring or penetrating the earth > With means movable relative to tool to receive, retain, or sever undisturbed core > Core-retaining or severing means > Actuated upon relative movement between tool and tool shaft > Relative rotary movement
Description: Apparatus in which the core retaining or severing means move into core engagement upon relative rotational movement between the tool and tool shaft.

Patents under this class:

Patent Number Title Of Patent Date Issued
8365839 Substantially simultaneous core containment, core retrieval and borehole abatement Feb. 5, 2013
7392856 Rotating drum variable depth sampler Jul. 1, 2008
7121356 Tools and methods for retrieving buried coins and other treasure Oct. 17, 2006
6644424 Core barrel Nov. 11, 2003
6550549 Core break-off mechanism Apr. 22, 2003
6360829 Soil sampling device Mar. 26, 2002
5957221 Downhole core sampling and testing apparatus Sep. 28, 1999
4694916 Continuous coring drill bit Sep. 22, 1987

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