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Class Information
Number: 175/250
Name: Boring or penetrating the earth > With means movable relative to tool to receive, retain, or sever undisturbed core > Core-retaining or severing means > Fluid-actuated
Description: Apparatus in which the core retaining or severing means is moved from one position to another by fluid pressure or flow.










Patents under this class:

Patent Number Title Of Patent Date Issued
8233289 Multilayer wiring substrate and method for manufacturing the same Jul. 31, 2012
7234547 Apparatus and methods for sponge coring Jun. 26, 2007
7231991 Apparatus and methods for sponge coring Jun. 19, 2007
7004265 Apparatus and methods for sponge coring Feb. 28, 2006
6719070 Apparatus and methods for sponge coring Apr. 13, 2004
6644424 Core barrel Nov. 11, 2003
6505693 Soil sampler Jan. 14, 2003
6394192 Methods for seabed piston coring May. 28, 2002
6394196 Core drill May. 28, 2002
6145604 Core Machine Nov. 14, 2000
6116358 Core sampler Sep. 12, 2000
6009960 Coring tool Jan. 4, 2000
5592994 Propulsion seal for wire line core drilling apparatus Jan. 14, 1997
5487433 Core separator assembly Jan. 30, 1996
5411106 Method and apparatus for acquiring and identifying multiple sidewall core samples May. 2, 1995
5253720 Method and apparatus for taking an undisturbed core sample Oct. 19, 1993
5038873 Drilling tool with retractable pilot drilling unit Aug. 13, 1991
4887676 Device for closing a core barrel installed in a drilling rig Dec. 19, 1989
4875531 Core drilling tool with direct drive Oct. 24, 1989
4834198 Positive latch wire line core barrel apparatus May. 30, 1989
4664205 Hydraulic inner barrel in a drill string coring tool May. 12, 1987
4651835 Core catcher for use with an hydraulically displaced inner tube in a coring tool Mar. 24, 1987
4606416 Self activating, positively driven concealed core catcher Aug. 19, 1986
4605075 Shrouded core catcher Aug. 12, 1986
4603749 Apparatus for downward displacement of an inner tube within a coring barrel Aug. 5, 1986
4553613 Hydraulic lift inner barrel in a drill string coring tool Nov. 19, 1985
4552229 Externally powered core catcher Nov. 12, 1985
4545432 Device for retrieving objects from wells Oct. 8, 1985
4518051 Percussion actuated core sampler May. 21, 1985
4518050 Rotating double barrel core sampler May. 21, 1985
4014393 Core receiver and method of use thereof Mar. 29, 1977
3949819 Soil sampling device Apr. 13, 1976











 
 
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