| Patents for E21C 37 - Other methods or devices for dislodging with or without loading (1,249) |
|---|
| 08/26/1998 | CN1191587A Method and apparatus for blasting hard rock |
| 08/26/1998 | CN1191504A Discharge hydraulic pressure destroying method |
| 08/19/1998 | EP0858874A1 Discharge destroying device and method of discharge destroy |
| 08/04/1998 | US5789694 Breaking up of rock and the like |
| 07/14/1998 | US5778571 Device and process for bonding wearing parts on an excavator |
| 07/08/1998 | CN1186897A Coal underground gasifying technology |
| 07/01/1998 | EP0850349A1 Method, apparatus and cartridge for non-explosive rock fragmentation |
| 06/30/1998 | US5773750 Rock fragmentation system using gold schmidt method |
| 06/30/1998 | US5772284 For removing covering from a supporting surface |
| 06/24/1998 | CN1185766A Discharge destroying method, discharge destroying device and method of manufacturing the same |
| 06/17/1998 | CN1185130A Discharge destroying device and method of discharge destroy |
| 06/16/1998 | US5765923 Cartridge for generating high-pressure gases in a drill hole |
| 05/27/1998 | EP0843774A1 Method for controlled fragmentation of hard rock and concrete by the combination use of impact hammers and small charge blasting |
| 04/23/1998 | WO1998016713A1 Excavation method using electric pulses, and excavator |
| 04/07/1998 | US5735355 For heating a surrounding geological structure to a molten state |
| 03/12/1998 | WO1998010169A1 Blasting device |
| 03/11/1998 | EP0827813A2 Hydraulically actuated mechanism with automatic stroke change |
| 02/26/1998 | WO1998007960A1 Underground augering machine by electrical crushing, excavator, and its excavating method |
| 02/26/1998 | WO1998007959A1 Method and device for crushing material by discharging pulsed electric energy and method and device for generating high-voltage pulse |
| 02/25/1998 | EP0824625A1 Method and apparatus for blasting hard rock |
| 02/11/1998 | CN1172891A Integral coal mining method |
| 12/17/1997 | EP0494257B1 Demolition hammer |
| 12/10/1997 | EP0811105A1 Plasma blasting probe assembly |
| 11/18/1997 | US5689085 Explosive displacing bore hole tube |
| 11/18/1997 | CA2014217C Drill rod retrieval device |
| 10/30/1997 | WO1997040256A1 Process for blasting of solid materials |
| 10/23/1997 | DE19615624A1 Impulssprengverfahren mittels Flüssigkeiten oder Gasen Pulse blasting using liquids or gases |
| 10/22/1997 | CN1162690A Underground mining process |
| 10/14/1997 | US5676427 Apparatus for hydraulically splitting up rock |
| 09/24/1997 | EP0796384A1 Drilling process and device |
| 09/24/1997 | CN1160191A Rock fragmentation system using gold schmidt method |
| 09/23/1997 | US5670737 Breaking up of rock and the like |
| 08/21/1997 | DE19606228A1 Cutting rectangular stone building blocks in quarry |
| 07/22/1997 | US5650588 Method for setting blasting employing bar-like charge |
| 07/17/1997 | WO1997025520A1 Apparatus for retaining a material breaking device |
| 06/04/1997 | EP0777102A2 Rock fragmentation system using Gold-Schmidt method |
| 06/03/1997 | US5634691 Method for excavating a working face by blasting |
| 05/15/1997 | DE19541539A1 Method for electrodynamically breaking up hard materials |
| 05/07/1997 | CN2253775Y Hydraulic dislodging machine with wedge |
| 05/07/1997 | CN1149101A Method for crushing voerhead coal |
| 04/23/1997 | EP0569478B1 High voltage ripping apparatus |
| 04/03/1997 | WO1997006402A3 Controlled small-charge blasting by explosive |
| 04/02/1997 | CN2251046Y 煤层采样机 Seam Sampler |
| 03/27/1997 | WO1997011257A1 Power element |
| 03/27/1997 | WO1997011256A1 Power element |
| 03/20/1997 | WO1997010414A1 Method, apparatus and cartridge for non-explosive rock fragmentation |
| 03/20/1997 | WO1997010410A1 Drilling process and device |
| 03/20/1997 | CA2231235A1 Method, apparatus and cartridge for non-explosive rock fragmentation |
| 03/20/1997 | CA2205053A1 Drilling process and device |
| 03/18/1997 | US5611605 Method apparatus and cartridge for non-explosive rock fragmentation |
| 03/05/1997 | EP0542876B1 Controlled fracture method and apparatus for breaking hard compact rock and concrete materials |
| 02/20/1997 | WO1997006402A2 Controlled small-charge blasting by explosive |
| 02/20/1997 | WO1997006348A1 Method for controlled fragmentation of hard rock and concrete by the combination use of impact hammers and small charge blasting |
| 02/20/1997 | CA2235676A1 Method for controlled fragmentation of hard rock and concrete by the combination use of impact hammers and small charge blasting |
| 02/20/1997 | CA2228646A1 Method and apparatus for controlled small-charge blasting of hard rock and concrete by explosive pressurization of the bottom of a drill hole |
| 02/13/1997 | WO1997004934A1 Discharge hydraulic pressure destroying method |
| 02/06/1997 | WO1997003797A1 Discharge destroying device and method of discharge destroy |
| 02/06/1997 | WO1997003796A1 Discharge destroying method, discharge destroying device and method of manufacturing the same |
| 01/15/1997 | EP0753096A1 Controlled fragmentation of hard rock by pressurization of the bottom of a drill hole |
| 01/15/1997 | CN2245118Y Rocker-arm sampling mechanism |
| 01/09/1997 | DE19625509A1 Werkzeugkomponente Tool component |
| 12/12/1996 | WO1996039567A1 Method and apparatus for blasting hard rock |
| 12/03/1996 | US5579594 For bonding removable teeth and adapters |
| 11/20/1996 | CN1136130A Method for automation of coal mining at declined gallery |
| 11/13/1996 | EP0742345A2 Method and apparatus for removing a minable product from an underground seam |
| 11/13/1996 | EP0741835A1 Pressure actuated fracture device |
| 11/13/1996 | CN2240043Y Chemical expansion coal mining device |
| 11/13/1996 | CN1135473A Non-gunpowder blasting composition |
| 11/12/1996 | US5573307 Method and apparatus for blasting hard rock |
| 11/06/1996 | EP0740737A1 Method and apparatus for plasma blasting |
| 10/31/1996 | DE19533765C1 Boring hard rocks e.g. granite by hydrogen and fluorine combustion avoiding pollution |
| 10/23/1996 | CN1133935A Water gun crushing method and device |
| 09/17/1996 | CA2067126C Demolition hammer |
| 09/06/1996 | WO1996027066A1 Plasma blasting probe assembly |
| 09/06/1996 | CA2213492A1 Plasma blasting probe assembly |
| 07/24/1996 | CN1127322A Hydraulic mining excavator |
| 07/02/1996 | US5532449 Using plasma ARC and thermite to demolish concrete |
| 07/02/1996 | US5531507 Method of removing a minable product from an underground seam and bottom hole tool |
| 06/26/1996 | EP0717811A1 Process and device for cutting and large surface excavating solid materials |
| 04/30/1996 | CA1338290C Impact kerfing rock cutter and method |
| 04/16/1996 | US5507051 Prospector tool |
| 04/10/1996 | CN1120114A Method for excavating a working face |
| 04/10/1996 | CN1120113A Breaking up of rock and the like |
| 03/12/1996 | US5497838 For channeling a mineral body |
| 02/28/1996 | EP0499602B1 Linear impact ripper apparatus |
| 01/18/1996 | WO1996001361A1 Process and device for cutting and large surface excavating solid materials |
| 01/17/1996 | EP0692611A2 Method for excavating a working face |
| 01/11/1996 | DE4423477A1 Verfahren zum Strahlschneiden mit Explosivstoffen Method for Cutting with explosives |
| 01/10/1996 | CN1030666C Floor-expanding hollow cavity underholing blasting method and cutting tool |
| 01/09/1996 | US5482357 Plasma blasting probe assembly |
| 01/02/1996 | US5479994 Method of electrothermomechanical drilling and device for its implementation |
| 12/27/1995 | CN2216143Y Soundless crush dislodging device |
| 12/12/1995 | US5474364 Shotgun cartridge rock breaker |
| 12/07/1995 | WO1995033124A1 Retaining apparatus for a rock breaking mechanism |
| 10/26/1995 | WO1995028551A1 Controlled fragmentation of hard rock by pressurization of the bottom of a drill hole |
| 09/19/1995 | CA2015102C Plasma blasting method |
| 08/10/1995 | WO1995021318A1 Pressure actuated fracture device |
| 07/27/1995 | WO1995020097A1 Method and apparatus for plasma blasting |
| 07/26/1995 | EP0664375A1 Hydraulic wedge device |
| 07/25/1995 | US5435628 Underground hydraulic mining method and apparatus |