| Patents for E21C 37 - Other methods or devices for dislodging with or without loading (1,249) |
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| 01/02/2004 | EP1375004A1 Crushing apparatus electrode and crushing apparatus |
| 12/10/2003 | CN1461239A Curshing apparatus electrode and crushing apparatus |
| 12/02/2003 | US6655290 Structure of slackening type blasting mat |
| 11/25/2003 | US6651860 Percussive striking electric tool device |
| 11/13/2003 | WO2003092962A1 Hammer moil with water jet |
| 11/12/2003 | EP1009912B1 Method of controlling rock drilling |
| 11/05/2003 | EP0843774B1 Method for controlled fragmentation of hard rock and concrete by the combination use of impact hammers and small charge blasting |
| 10/29/2003 | EP1062406B1 Process and device for splitting stones |
| 10/14/2003 | CA2088924C Controlled fracture method and apparatus for breaking hard compact rock and concrete materials |
| 09/23/2003 | US6622631 Slackening type blasting method |
| 08/27/2003 | EP1338758A1 Apparatus and method for fracturing a hard material |
| 08/20/2003 | EP1336074A1 Drillhole blasting |
| 08/19/2003 | US6608967 Method and apparatus for fracturing brittle materials by thermal stressing |
| 08/07/2003 | US20030146655 Extraction machine for underground ore extraction operations and a method of extracting output products in underground ore extraction operations |
| 07/24/2003 | WO2003060419A1 Method of and apparatus for breaking rock |
| 07/24/2003 | WO2003060290A1 Activated stemming device |
| 07/24/2003 | US20030137182 Method and apparatus for a plasma-hydraulic continuous excavation system |
| 07/24/2003 | CA2472533A1 Activated stemming device |
| 07/17/2003 | WO2003057996A2 Method and apparatus for a plasma-hydraulic continuous excavation system |
| 07/16/2003 | CN1114752C Blasting device |
| 07/15/2003 | US6591731 Method and apparatus for penetrating hard materials using a energetic slurry |
| 07/10/2003 | WO2003056133A1 Element for initiating propellant |
| 07/10/2003 | CA2471716A1 Element for initiating propellant |
| 06/25/2003 | EP0842391B1 Method and apparatus for controlled small-charge blasting of hard rock and concrete by explosive pressurization of the bottom of a drill hole |
| 06/04/2003 | CN1422379A Cartridge shell and cartridge fo blast holes and method of use |
| 05/30/2003 | WO2003044321A1 Rock prying apparatus for hanging roof in mines |
| 04/24/2003 | WO2003033991A1 Method for carrying out drilling and blasting in watered masses |
| 04/01/2003 | US6539933 Process and device for splitting stones |
| 03/27/2003 | WO2003025341A1 Method for automatic generation of a drill pattern |
| 03/18/2003 | US6532874 Method of blasting bench of rock with improved blasting efficiency and reduced blasting nuisance |
| 03/05/2003 | CN1400719A Impact electric machine tool |
| 03/05/2003 | CN1400082A Impact electrical tool |
| 02/26/2003 | CN2537816Y Cutting machine |
| 02/11/2003 | US6517164 Hammer-ripper excavating system |
| 02/05/2003 | EP1281485A1 Portable Electrically Driven Percussive Tool |
| 02/05/2003 | EP1281484A1 Electrical percussion Tool |
| 02/05/2003 | EP1281039A1 Cartridge shell and cartridge for blast holes and method of use |
| 01/30/2003 | US20030019645 Percussive striking electric tool device |
| 01/30/2003 | US20030019644 Rotary-percussion electrical tool |
| 01/30/2003 | US20030019383 Method of blasting bench of rock with improved blasting efficiency and reduced blasting nuisance |
| 01/28/2003 | US6510902 Method and device for determining the operating time and the operating condition of a hydraulic percussion unit |
| 01/13/2003 | WO2002083312A1 Crushing apparatus electrode and crushing apparatus |
| 01/13/2003 | CA2416034A1 Crushing apparatus electrode and crushing apparatus |
| 01/07/2003 | US6502569 No-vibration and no-noise rock splitter of oil hydraulic piston type |
| 01/04/2003 | CA2352274A1 Oil sand spiral surface mining apparatus |
| 01/02/2003 | US20030004603 Apparatus for converting measurement signals into digital signals, the signals having been initiated in a piezo sensor by the impacts of a hydraulic percussion device |
| 01/02/2003 | EP1271105A2 Device for converting measurement signals produced by a piezo-sensor into digital signals |
| 12/27/2002 | WO2002103280A1 Protection of blast holes |
| 12/25/2002 | CN1097130C Device and method for connecting excavation teeth with connector used in civil engineering apparatus, and use thereof |
| 12/19/2002 | WO2002101196A1 A method of excavating a hard material body |
| 12/18/2002 | EP1029151B1 Method and device for crushing rock |
| 12/18/2002 | CN2526493Y High-precision positioning screw jointing structure for rock bit |
| 12/05/2002 | WO2002097239A1 Load-bearing element |
| 11/20/2002 | CN2521396Y Water & electric co-controlling wetted electric coal drill |
| 11/14/2002 | WO2002090872A1 Breaking hard material |
| 11/13/2002 | EP1204841A4 Three dimensional multi-phase tunneling method and equipments thereof |
| 10/24/2002 | WO2002084077A1 Method of fracturing a structure composed of interspersed layers of hard and soft material |
| 10/23/2002 | CN1375680A Rock stepped blasting method of increasing blasting efficiency and reducing blasting damage |
| 10/01/2002 | US6457778 Electro-power impact cell for plasma blasting |
| 09/26/2002 | WO2002075115A1 A method of sinking a shaft |
| 09/24/2002 | US6455808 Pulse power system |
| 09/19/2002 | WO2002073120A1 Mining method |
| 09/11/2002 | CN1369055A Three dimensional multi-phase tunneling method and equipment thereof |
| 08/22/2002 | US20020112600 Method and apparatus for penetrating hard materials |
| 08/20/2002 | US6435096 Method and apparatus for controlled small-charge blasting by decoupled explosive |
| 08/13/2002 | US6431074 Blasting apparatus, blasting method and retainer member used for the blasting method |
| 07/25/2002 | US20020095826 Mining shovel horizontal compensator |
| 06/25/2002 | US6408761 Blasting apparatus |
| 06/20/2002 | US20020074849 Extraction machine for underground ore extraction operations and a method of extracting output products in underground ore extraction operations |
| 06/18/2002 | US6405628 Method and apparatus for penetrating hard materials |
| 06/13/2002 | US20020070600 Three dimensional multi-phase tunneling method and equipments thereof |
| 06/13/2002 | DE10051087C1 Material breaking up process involves creating thermal stresses by applying electromagnetic radiation to at least some regions of material to be broken up |
| 05/30/2002 | WO2002042711A1 Drillhole blasting |
| 05/30/2002 | WO2002042607A1 Device for splitting a block of stone |
| 05/21/2002 | US6390189 Feed apparatus for feeding capsular cartridges into drilled hole |
| 05/15/2002 | EP1204841A1 Three dimensional multi-phase tunneling method and equipments thereof |
| 05/02/2002 | EP0740737B1 Method and apparatus for plasma blasting |
| 04/23/2002 | US6375271 Controlled foam injection method and means for fragmentation of hard compact rock and concrete |
| 04/05/2002 | CA2358273A1 Mining shovel horizontal compensator |
| 04/04/2002 | DE10046497A1 Ore mining equipment with powered support and conveyor uses demountably fitted drill and loader on unit riding face conveyor plus fitted blast shields and guard waste-side of conveyor with sealable drawhole in support canopy. |
| 03/13/2002 | CN1080873C Breakdown device |
| 02/27/2002 | CN1079878C Method and apparatus for blasting hard rock |
| 02/19/2002 | US6347837 Slide assembly having retractable gas-generator apparatus |
| 02/07/2002 | US20020014176 Cartridge shell and cartridge for blast holes and method of use |
| 01/22/2002 | US6339992 Small charge blasting apparatus including device for sealing pressurized fluids in holes |
| 01/17/2002 | US20020005135 Slackening type blasting method |
| 01/16/2002 | EP1172630A1 Electric discharge breaking system and manufacturing method thereof |
| 01/16/2002 | EP1172629A1 Electric discharge breaking system |
| 01/16/2002 | EP1171749A1 A method and apparatus for fly rock control in small charge blasting |
| 01/16/2002 | CN1331378A Shooting breakdown method for blast mining face in coal mine |
| 01/16/2002 | CN1077951C Coal underground gasifying tech |
| 01/03/2002 | US20020000173 Structure of slackening type blasting mat |
| 12/05/2001 | EP1159581A1 A method and apparatus for pressure wave suppression in small-charge blasting |
| 12/05/2001 | CN1325014A Relaxation type blasting method and protection cover structure for blasting |
| 11/28/2001 | CN1075430C Discharge hydraulic pressure destroying method |
| 11/22/2001 | US20010042485 Blasting apparatus, blasting method and retainer member used for the blasting method |
| 11/22/2001 | DE10124123A1 Discharge-type explosion method; involves boring even blast holes, distributing explosive substance and using explosion mat with steel plate, elastic component and weight-reinforcement component |
| 11/15/2001 | DE10032077A1 Device for adapting externally applied hydraulic power to hydraulic hammer power demand converts external volumetric flow to output flow adapted to maximum permitted input flow |
| 10/23/2001 | US6305753 Hydraulic expansion tube |
| 10/23/2001 | US6305752 Pneumatic blasting device |