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Class Information
Number: 175/296
Name: Boring or penetrating the earth > Below-ground (1) hammer, or (2) impact members > Fluid-operated
Description: Apparatus in which (1) the hammer or impact device is acted upon and propelled by a body of fluid to deliver a blow (2) a body of fluid acts directly upon the hammer or impact device, or on holding means therefor to restrain said device against movement, and means to relieve the device or holding means from the influence of the restraining fluid to deliver a blow or (3) a means for holding the hammer or impact device against movement is released by a body of fluid to deliver a blow.
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 |
| 7581599 |
Percussive device for a rock drilling machine, method for achieving a reciprocating piston movement and rock drilling machine |
Sep. 1, 2009 |
| 7581602 |
Downhole hammer drill |
Sep. 1, 2009 |
| 7555854 |
Earth auger head and excavation method |
Jul. 7, 2009 |
| 7549485 |
Expandable reamer apparatus for enlarging subterranean boreholes and methods of use |
Jun. 23, 2009 |
| 7467675 |
Device for channeling solids and fluids within a reverse circulation drill |
Dec. 23, 2008 |
| 7467674 |
Rock drilling equipment |
Dec. 23, 2008 |
| 7461706 |
Drilling apparatus with percussive action cutter |
Dec. 9, 2008 |
| 7451834 |
Impact enhancing apparatus and method |
Nov. 18, 2008 |
| 7426965 |
Power transmission unit of an impactor, a hydraulic jet impactor and the application thereof |
Sep. 23, 2008 |
| 7419015 |
Rock drilling machine and axial bearing |
Sep. 2, 2008 |
| 7404458 |
Rotary percussive drilling device |
Jul. 29, 2008 |
| 7395883 |
Keyed connection for drill bit |
Jul. 8, 2008 |
| 7377338 |
Downhole percussion tool |
May. 27, 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 |
| 7293614 |
Multiple impact jar assembly and method |
Nov. 13, 2007 |
| 7290626 |
Transmission sleeve |
Nov. 6, 2007 |
| 7240744 |
Rotary and mud-powered percussive drill bit assembly and method |
Jul. 10, 2007 |
| 7234548 |
Hydraulic rotary-percussive hammer drill |
Jun. 26, 2007 |
| 7198120 |
Down-the-hole drill assembly |
Apr. 3, 2007 |
| 7163058 |
Hydraulic jar device |
Jan. 16, 2007 |
| 7159674 |
Method and device for directional down-hole drilling |
Jan. 9, 2007 |
| 7159676 |
Fluid distributor device for down-hole-drills |
Jan. 9, 2007 |
| 7104344 |
Percussion drilling head |
Sep. 12, 2006 |
| 7096980 |
Rotary impact well drilling system and method |
Aug. 29, 2006 |
| 7093671 |
Pneumatic rock-boring device and method for starting such a device |
Aug. 22, 2006 |
| 7090038 |
Bedrock drilling and excavating apparatus |
Aug. 15, 2006 |
| 7066251 |
Hydraulic jar lock |
Jun. 27, 2006 |
| 7066279 |
Pneumatic ground piercing tool |
Jun. 27, 2006 |
| 7048074 |
Control system for a percussion drive |
May. 23, 2006 |
| 7040421 |
Liquid driven downhole drilling machine |
May. 9, 2006 |
| 7040417 |
Drilling systems |
May. 9, 2006 |
| 7036611 |
Expandable reamer apparatus for enlarging boreholes while drilling and methods of use |
May. 2, 2006 |
| 7028785 |
Pneumatic impact piercing tool |
Apr. 18, 2006 |
| 7011156 |
Percussion tool and method |
Mar. 14, 2006 |
| 6994175 |
Hydraulic drill string |
Feb. 7, 2006 |
| 6923270 |
Pneumatic impact piercing tool |
Aug. 2, 2005 |
| 6892829 |
Two string drilling system |
May. 17, 2005 |
| 6889777 |
Implement for driving posts |
May. 10, 2005 |
| 6883618 |
Variable timing for front chamber of pneumatic hammer |
Apr. 26, 2005 |
| 6814165 |
Hard rock drilling device and method |
Nov. 9, 2004 |
| 6745836 |
Down hole motor assembly and associated method for providing radial energy |
Jun. 8, 2004 |
| 6742605 |
Percussion tool for generic downhole fluid motors |
Jun. 1, 2004 |
| 6712134 |
Modular bi-directional hydraulic jar with rotating capability |
Mar. 30, 2004 |
| 6702045 |
Drilling apparatus |
Mar. 9, 2004 |
| 6698537 |
Bit retention system |
Mar. 2, 2004 |
| 6675909 |
Hydraulic jar |
Jan. 13, 2004 |
| 6659202 |
Steerable fluid hammer |
Dec. 9, 2003 |
| 6588518 |
Drilling method and measurement-while-drilling apparatus and shock tool |
Jul. 8, 2003 |
| 6557652 |
Method for performing ground or rock work and hydraulic percussion device |
May. 6, 2003 |
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