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Class Information
Number: 175/253
Name: Boring or penetrating the earth > With means movable relative to tool to receive, retain, or sever undisturbed core > Core-retaining or severing means > With element holding retaining or severing means inactive
Description: Apparatus including a means to positively hold the core retaining or severing means out of core contact position until a certain condition or manipulation takes place, said holding means generally being deactivated upon the formation of a substantial length of core.

Patents under this class:

Patent Number Title Of Patent Date Issued
6394196 Core drill May. 28, 2002
6116358 Core sampler Sep. 12, 2000
5353940 Alignment system for crane works and method of alignment Oct. 11, 1994
5101917 In-place soil sampler Apr. 7, 1992
4946000 Undisturbed soil sampler Aug. 7, 1990
4930587 Coring tool Jun. 5, 1990
4671367 Pole hole digger with percussive core drilling Jun. 9, 1987
4664205 Hydraulic inner barrel in a drill string coring tool May. 12, 1987
4553613 Hydraulic lift inner barrel in a drill string coring tool Nov. 19, 1985
4552229 Externally powered core catcher Nov. 12, 1985
4440240 Method of making holes in the soil and apparatus for performing this method Apr. 3, 1984
4015433 Method for settling anchoring device in the ground Apr. 5, 1977
3949497 Releasable latching apparatus for a benthic grab Apr. 13, 1976

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