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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:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 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 |
| 5836408 |
Rotary percussion blow assisted drill |
Nov. 17, 1998 |
| 5813484 |
Casing tube with casing shoe |
Sep. 29, 1998 |
| 5494119 |
Core sampling device |
Feb. 27, 1996 |
| 5337841 |
Hammer type soil excavating machine |
Aug. 16, 1994 |
| 5325926 |
Reversible casing for a down-the-hole percussive apparatus |
Jul. 5, 1994 |
| 5125462 |
Quick-change ram boring head |
Jun. 30, 1992 |
| 5065827 |
Hammer bit retention tool |
Nov. 19, 1991 |
| 5018590 |
Electromagnetic drilling apparatus |
May. 28, 1991 |
| 5004056 |
Percussion-rotary drilling tool |
Apr. 2, 1991 |
| 5002139 |
Drilling tool |
Mar. 26, 1991 |
| 4961469 |
Drill string element |
Oct. 9, 1990 |
| 4903785 |
Drilling and chiseling tool bit |
Feb. 27, 1990 |
| 4727944 |
Percussion drill string assembly |
Mar. 1, 1988 |
| 4722402 |
Electromagnetic drilling apparatus and method |
Feb. 2, 1988 |
| 4658901 |
Method of and apparatus for removing stuck well pipe |
Apr. 21, 1987 |
| 4613003 |
Apparatus for excavating bore holes in rock |
Sep. 23, 1986 |
| 4440245 |
Gravity percussion drill with upper end cocking spring and method of assembly |
Apr. 3, 1984 |
| 4387776 |
Well case driving anvil |
Jun. 14, 1983 |
| 4368785 |
Well point and method of driving same |
Jan. 18, 1983 |
| 4106779 |
Automatic sequential dual action sealing system |
Aug. 15, 1978 |
| 4094364 |
Percussion drill rod |
Jun. 13, 1978 |
| 3952819 |
Fatigue resistant anvil bit for percussion rock drill |
Apr. 27, 1976 |
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