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