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Class Information
Number: 175/298
Name: Boring or penetrating the earth > Below-ground (1) hammer, or (2) impact members > Continuous unidirectional rotary motion of one telescoping member effects consecutive impacts
Description: Apparatus in which the telescoping members are provided with means which cooperate to cause repetitive reciprocation of said members relative to each other when one member is continuously turned in the same direction about its axis.










Patents under this class:

Patent Number Title Of Patent Date Issued
8397839 Self-indexing down-the-hole drill Mar. 19, 2013
8307919 Clutch for a jack element Nov. 13, 2012
7882906 Up-down vibratory drilling and jarring tool Feb. 8, 2011
7866416 Clutch for a jack element Jan. 11, 2011
7832502 Methods and apparatus for drilling directional wells by percussion method Nov. 16, 2010
7410013 Boring and drilling apparatus Aug. 12, 2008
7040421 Liquid driven downhole drilling machine May. 9, 2006
7011156 Percussion tool and method Mar. 14, 2006
6761231 Rotary driven drilling hammer Jul. 13, 2004
6736209 Method for vibrational impact on a pipe string in a borehole and devices for carrying out said method May. 18, 2004
6729419 Electro-mechanical drilling jar May. 4, 2004
6588509 Well casing installation and removal apparatus and method Jul. 8, 2003
6588518 Drilling method and measurement-while-drilling apparatus and shock tool Jul. 8, 2003
6543557 Drill hammer assembly Apr. 8, 2003
6488105 Method and apparatus for subsurface exploration Dec. 3, 2002
6371209 Casing installation and removal apparatus and method Apr. 16, 2002
5918690 Bottom rotation shaft actuator Jul. 6, 1999
RE36166 Air percussion drilling assembly for directional drilling applications Mar. 30, 1999
5873579 Protective device for a fluid-operated percussion tool Feb. 23, 1999
5318140 Fluid operated drill apparatus Jun. 7, 1994
5305837 Air percussion drilling assembly for directional drilling applications Apr. 26, 1994
4890682 Apparatus for vibrating a pipe string in a borehole Jan. 2, 1990
4576229 Device for facilitating release of stuck drill collars Mar. 18, 1986
4558749 Anti-jamming core barrels Dec. 17, 1985
4408670 Impact cam subassembly for drills Oct. 11, 1983
4289210 Impact drill bit actuator Sep. 15, 1981
4279315 Apparatus for extracting cores Jul. 21, 1981
4253531 Self-balancing vibratory drill apparatus Mar. 3, 1981











 
 
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