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Class Information
Number: 175/293
Name: Boring or penetrating the earth > Below-ground (1) hammer, or (2) impact members
Description: Apparatus comprising (1) a reciprocable member positioned below ground adapted to cause a sudden jar shock or hammer below to the boring apparatus or (2) two telescoping members positioned below ground which members are capable of axial reciprocation with respect to each other and are provided with means to limit said reciprocation, the means for limiting reciprocation being for the purpose of causing an impact or hammer blow or jar to the boring apparatus or a portion thereof.

Sub-classes under this class:

Class Number Class Name Patents
175/294 Combined with safety joint 4
175/298 Continuous unidirectional rotary motion of one telescoping member effects consecutive impacts 28
175/296 Fluid-operated 273
175/299 Resiliently biased 62
175/305 Telescoping members relatively rotatable 23
175/295 With noncutting portion forwardly of sleeve impact member having a cutting portion (e.g., reamer) 10
175/300 With releasable means to detachably retain telescoping members against axial reciprocation 31

Patents under this class:
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Patent Number Title Of Patent Date Issued
8678107 System and method for drilling hammer communication, formation evaluation and drilling optimization Mar. 25, 2014
8657040 Percussion drilling assembly and locking system therefor Feb. 25, 2014
8651202 Percussion drilling assembly having a floating feed tube Feb. 18, 2014
8640794 Pressurized fluid flow system for a normal circulation hammer and hammer thereof Feb. 4, 2014
8636088 Rock drilling machine and axial bearing module Jan. 28, 2014
8631883 Sectorial force balancing of drill bits Jan. 21, 2014
8511403 Steerable ground piercing tools Aug. 20, 2013
8443875 Down hole tool with adjustable fluid viscosity May. 21, 2013
8365827 Fracturing method to reduce tortuosity Feb. 5, 2013
8347988 Down-hole hammer drill Jan. 8, 2013
8307919 Clutch for a jack element Nov. 13, 2012
8256539 Steerable ground piercing tools Sep. 4, 2012
8245798 Female part and a method for manufacturing female parts Aug. 21, 2012
8132631 Method of geothermal loop installation Mar. 13, 2012
8083010 Drilling device for drilling and reaming of a hole Dec. 27, 2011
8051926 Control device Nov. 8, 2011
8051927 Percussive drill bit for rock drilling and method for the manufacture of such a drill bit Nov. 8, 2011
8006784 Backhead and drill assembly with backhead Aug. 30, 2011
7997346 Percussion drilling assembly with annular locking member Aug. 16, 2011
7954565 Thread retention for an earth boring device Jun. 7, 2011
7950475 Percussion drilling assembly having a floating feed tube May. 31, 2011
7921941 Pressurized fluid flow system for a reverse circulation hammer Apr. 12, 2011
7866416 Clutch for a jack element Jan. 11, 2011
7828079 Sonic wireline dry slough barrel Nov. 9, 2010
7766087 Methods and apparatus for placement of well equipment Aug. 3, 2010
7748478 Percussion drilling assembly and hammer bit with an adjustable choke Jul. 6, 2010
7712838 Ground support insertion tool May. 11, 2010
7624822 Thread joint Dec. 1, 2009
7617889 Backhead and drill assembly with backhead Nov. 17, 2009
7428938 Percussion bit drill drive collar with retention mechanism and method of assembling Sep. 30, 2008
7353890 Down-the-hole hammer and components for a down-the-hole hammer, and a method of assembling a down-the-hole hammer Apr. 8, 2008
7347287 Hydraulic timing device Mar. 25, 2008
7299872 Hydraulic-mechanical jar tool Nov. 27, 2007
7290624 Method and device for drilling holes in soil or rock material Nov. 6, 2007
7267176 Downhole resettable jar tool with axial passageway and multiple biasing means Sep. 11, 2007
7255182 Ground drilling tool Aug. 14, 2007
7234548 Hydraulic rotary-percussive hammer drill Jun. 26, 2007
7198120 Down-the-hole drill assembly Apr. 3, 2007
6749031 Drilling system Jun. 15, 2004
6742609 Rotational impact drill assembly Jun. 1, 2004
6626248 Assembly and method for jarring a drilling drive pipe into undersea formation Sep. 30, 2003
6543556 Abnormal torque absorber for drilling Apr. 8, 2003
6540034 Portable seismic shothole drilling system Apr. 1, 2003
6530440 Percussive drilling apparatus Mar. 11, 2003
6412614 Downhole shock absorber Jul. 2, 2002
6183163 Method and apparatus for laying out a pipeline Feb. 6, 2001
6176325 Moling apparatus and a ground sensing system therefor Jan. 23, 2001
6164392 Percussive drilling apparatus Dec. 26, 2000
6148934 Coupling piece for use at simultaneous earth and/or rock drilling with an upper rotary percussion device and a lower percussion device Nov. 21, 2000
6109373 Cable overshot apparatus Aug. 29, 2000

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