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Class Information
Number: 175/251
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
Description: Apparatus in which a relative movement between the tool and tool shaft (1) moves the core retaining or severing means into engagement with the core or (2) releases the core retaining or severing means so that they can move into core engagement.










Sub-classes under this class:

Class Number Class Name Patents
175/252 Relative rotary movement 8


Patents under this class:

Patent Number Title Of Patent Date Issued
7934568 Rock core removal method and apparatus May. 3, 2011
7347284 Apparatus and method for hard rock sidewall coring of a borehole Mar. 25, 2008
7314101 Inner core barrel head assembly for core tube within a drill string Jan. 1, 2008
6732818 Oriented core barrel system May. 11, 2004
6695078 Large diameter sampler for gathering an undisturbed sample Feb. 24, 2004
6425449 Up-hole pump-in core barrel apparatus Jul. 30, 2002
6116358 Core sampler Sep. 12, 2000
5031708 Cockable corebreaker apparatus Jul. 16, 1991
4946000 Undisturbed soil sampler Aug. 7, 1990
4930587 Coring tool Jun. 5, 1990
4887676 Device for closing a core barrel installed in a drilling rig Dec. 19, 1989
4629011 Method and apparatus for taking core samples from a subterranean well side wall Dec. 16, 1986
4606416 Self activating, positively driven concealed core catcher Aug. 19, 1986
4573539 Hydraulically pulsed indexing system for sleeve-type core barrels Mar. 4, 1986
4552229 Externally powered core catcher Nov. 12, 1985
4263975 Device for high-speed boring of stepped post-holes Apr. 28, 1981











 
 
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