| Patents for E21C 37 - Other methods or devices for dislodging with or without loading (1,249) |
|---|
| 06/20/1995 | US5425570 Method and apparatus for plasma blasting |
| 05/24/1995 | CN1102868A Impactor |
| 04/26/1995 | EP0649973A2 Hydraulic excavator for shield tunneling machine |
| 04/25/1995 | US5409300 For dislodging of unstable rocks in galleries of subterranean mines |
| 04/18/1995 | US5407252 Method and apparatus for scaling mine roofs and ribs |
| 03/22/1995 | CN2192723Y Pneumatic hand pinch machine |
| 03/21/1995 | US5398998 Pressure actuated fracture device |
| 03/08/1995 | CN1099835A Device and process for bending wearing parts at the ends of tools and receptacles used on civil engineering plant |
| 02/19/1995 | CA2130391A1 Blast expansion tube and its method of use in mining ore |
| 02/16/1995 | WO1995004871A1 Hydraulic wedge device |
| 02/16/1995 | CA2146771A1 Hydraulic wedge device |
| 02/07/1995 | US5386877 Apparatus to assist an earthmoving vehicle |
| 01/05/1995 | DE4335753C1 Hydraulically driven mining excavator for a driving apparatus for underground driving |
| 12/08/1994 | WO1994028255A1 Device for removing lateral vertical material walls |
| 10/12/1994 | EP0619416A1 Method to dig out stone blocks and apparatus to carry out said method |
| 10/05/1994 | EP0618334A1 Device and method for coupling wear parts to implement borders for earth moving machines |
| 08/03/1994 | CN1090234A Apparatus for retaining a device |
| 08/02/1994 | US5333937 Excavation machine having combined impact hammers and static ripper pick |
| 07/27/1994 | EP0407467B1 Hammer-swinging mechanism |
| 07/06/1994 | EP0377052B1 Power element |
| 05/03/1994 | US5308149 Non-explosive drill hole pressurization method and apparatus for controlled fragmentation of hard compact rock and concrete |
| 04/15/1994 | CA2108390A1 Excavation machine |
| 04/06/1994 | EP0590527A1 Method for driving a tunnel and tunnel driving machines equipped for carrying out the method |
| 04/03/1994 | CA2107536A1 Process for the driving of a tunnel and tunnel borers therefore |
| 02/17/1994 | WO1994003707A1 Apparatus for retaining a rock-breaking device in a hole |
| 01/11/1994 | US5277264 Hydropneumatic hammer |
| 11/18/1993 | EP0569478A1 High voltage ripping apparatus. |
| 10/14/1993 | WO1993020323A1 Method and device for electrothermomechanical drilling |
| 10/06/1993 | CN1076983A High voltage ripping apparatus |
| 09/15/1993 | EP0559658A1 A method of fracturing rock or similar material |
| 09/01/1993 | CN2141464Y Plastic safety passive tube |
| 08/25/1993 | CN2140956Y Movable sliding hammer for drilling |
| 08/11/1993 | CN2139990Y Rock cutting gun |
| 07/28/1993 | CN2139174Y Explosion-proof air gun |
| 07/22/1993 | DE4227065A1 Hydropneumatic hammer drill for mining and road construction - has stepped diameter striking piston which divides cylinder into four chambers and permits short passages between valve and cylinder |
| 07/21/1993 | CN1074506A Technology for raising wet fatigue life of drill rod |
| 06/03/1993 | WO1993011309A1 High voltage ripping apparatus |
| 06/03/1993 | CA2101270A1 High voltage ripping apparatus |
| 05/27/1993 | WO1993010330A1 Fracturing device |
| 05/27/1993 | DE4204001C1 Scraper for handling boxed goods - has boom fitted with scraper chain and rippers which extend to sides to wall of material |
| 05/19/1993 | EP0494257A4 Demolition hammer |
| 04/20/1993 | CA1316548C Powered member |
| 03/31/1993 | EP0534369A1 Implement mounting bracket for earth working machines |
| 03/24/1993 | CA2078756A1 Mounting bracket |
| 02/03/1993 | CN2126722Y Hydraulic pressure drilling machine |
| 02/02/1993 | US5183316 Mounting bracket for a working device |
| 12/09/1992 | CN2124307U Hydraulic drill rod drawing machine |
| 11/25/1992 | CN1019224B Powered member |
| 10/27/1992 | US5159179 Heating device for accelerating the action of expansive mortars |
| 10/01/1992 | DE4102607A1 Machine for cutting concrete or stone - has oscillating half disc which has diamond segments attached to its periphery |
| 09/16/1992 | EP0504106A1 Device for mechanically fracturing rock, in particular rock blocks in quarries, and method for producing the wedge surfaces of the jaws |
| 09/16/1992 | CN1018253B Hydraulic impact tool |
| 08/19/1992 | CN2113342U Gas blast device operated by three person for mining |
| 08/11/1992 | CA1306243C Cartridge to expel fluids under pressure |
| 07/22/1992 | CN1062952A Method for increasing heat of coal |
| 07/15/1992 | EP0494257A1 Demolition hammer |
| 06/23/1992 | US5123710 Impact assisted segmented cutterhead |
| 05/27/1992 | CN1061460A Method of demolition incavity with expanded bottom and slots, and its cutter |
| 05/26/1992 | US5116104 Method and equipment for loosening and/or winning minerals especially coal and aggregated materials by using compressed air breaking |
| 05/20/1992 | CN2104931U Locking blasting means |
| 05/19/1992 | US5113950 For percussive tools, a housing, a pneumatic distributor, and a hammer piston means therefor |
| 05/12/1992 | US5111888 Hammer-swinging mechanism |
| 05/12/1992 | US5111801 Apparatus for forming slit in rock and concrete surface |
| 04/29/1992 | EP0482218A1 Process for the directed destruction of monolithic objects |
| 04/28/1992 | US5107937 Channelling a mineral body |
| 04/21/1992 | US5106164 Plasma blasting method |
| 04/18/1992 | WO1992007169A1 A method of fracturing rock or similar material |
| 04/18/1992 | CA2094729A1 Method of fracturing rock or similar material |
| 03/24/1992 | US5098163 Controlled fracture method and apparatus for breaking hard compact rock and concrete materials |
| 03/05/1992 | WO1992003635A1 Splitting apparatus |
| 02/20/1992 | WO1992002709A1 Controlled fracture method and apparatus for breaking hard compact rock and concrete materials |
| 02/20/1992 | DE3844774C2 Sand removal from castings |
| 02/11/1992 | US5087100 Method of fracturing rock or similar material and apparatus therefore |
| 01/14/1992 | US5080018 Cartridge for expelling fluids under pressure |
| 01/02/1992 | DE4020773A1 Drilling and chisel hammer - incorporates fluid container, fluid being activated by compressed air or pump for spraying against dust produced |
| 12/27/1991 | EP0462520A1 Resonant beam suspension pads |
| 12/25/1991 | CN2091351U Dilated machine |
| 12/21/1991 | CA2044883A1 Resonant beam suspension pads |
| 12/12/1991 | WO1991019076A1 Impact ripper apparatus |
| 11/12/1991 | CA1291985C Barrel for rock breaking tool |
| 10/23/1991 | EP0453076A1 Plasma blasting method |
| 09/25/1991 | EP0447552A1 Striking device |
| 09/18/1991 | CN2084980U Hydraulic static expander |
| 09/05/1991 | WO1991013238A1 Force element |
| 08/13/1991 | US5039170 Resonant beam suspension pads |
| 08/13/1991 | US5038668 Hydraulic striking mechanism |
| 08/06/1991 | US5037160 Flooring remover |
| 07/02/1991 | US5028092 Impact kerfing rock cutter and method |
| 06/18/1991 | US5024388 Stonework crusher |
| 06/04/1991 | US5020859 Apparatus for disintegrating monolythic entities |
| 05/14/1991 | US5015039 Hydraulically actuated mechanical rock excavator |
| 05/07/1991 | US5013093 Universal ripper miner |
| 05/07/1991 | US5012649 Power actuator |
| 05/03/1991 | WO1991006744A1 Linear impact ripper apparatus |
| 05/03/1991 | CA2072648A1 Linear inpact ripper apparatus |
| 04/10/1991 | EP0377052A4 Power element |
| 04/04/1991 | WO1991004455A1 Method for making cavities in hard ground |
| 03/30/1991 | WO1991005136A1 Demolition hammer |
| 03/26/1991 | US5003144 Microwave assisted hard rock cutting |
| 03/19/1991 | US5000517 Powered member for splitting rock and other bodies |