| Patents for E21C 27 - Machines which completely free the mineral from the seam (1,602) |
|---|
| 07/10/1979 | US4160566 Mining apparatus |
| 07/03/1979 | US4159852 Continuous mining machine with improved cutter head slide means |
| 07/03/1979 | US4159850 Mineral mining installation with face end winning |
| 07/03/1979 | US4159849 Holding device for a chain |
| 06/26/1979 | US4159149 Coal mining auger |
| 06/26/1979 | US4159055 Gathering head |
| 06/26/1979 | CA1057317A1 Method and apparatus for in-cutting and out-cutting during coal mining |
| 05/22/1979 | US4155598 Longwall mining machine |
| 05/22/1979 | US4155597 Mineral winning/detaching machines |
| 05/15/1979 | US4154480 Mineral mining installation |
| 05/15/1979 | US4154479 Hauling system for underground workings |
| 04/03/1979 | US4147391 Swivel mechanism for kerf-cutting machines |
| 03/27/1979 | CA1051195A1 Machine for cleaning up the walls of underground galleries |
| 03/13/1979 | US4143919 Mining machinery with guideway for relatively movable cutting units |
| 03/06/1979 | CA1050055A1 Mining machine having rectangular thrust transmitting conveyor column |
| 03/06/1979 | CA1050054A1 Cutting machine |
| 03/06/1979 | CA1050053A1 Dividing cutting machine |
| 02/27/1979 | US4141593 Coal plane with chain operated turning head |
| 12/26/1978 | US4131317 Mining machine having advancing mine roof supports |
| 12/19/1978 | CA1044711A1 Latch mechanism for auger string couplings |
| 12/12/1978 | CA1044260A1 Mining machine |
| 11/28/1978 | CA1043362A1 Bucket wheel reclaimers |
| 10/10/1978 | US4119347 Coal plough having separately adjustable cutters and flexible fluid power and control lines therefor |
| 10/03/1978 | US4118072 Variable wall mining machine |
| 09/05/1978 | US4111489 Stacked mineral mining plows independently driven or coupled |
| 09/05/1978 | US4111488 Method for cutting minerals and cutting machine |
| 08/22/1978 | US4108495 Guides for mineral mining machines |
| 08/22/1978 | US4108494 Cutting machine |
| 08/15/1978 | US4106815 Mining machines |
| 08/01/1978 | US4103975 Mining machine particularly a drum-cutter mining machine |
| 07/18/1978 | US4101173 Roof prop and platform movably mounted on boom of tunnelling machine |
| 07/04/1978 | US4098539 Cutting machine |
| 06/20/1978 | US4095845 Method of and apparatus for the mining of coal |
| 05/23/1978 | US4090736 Detachable cab construction for mining machines |
| 05/23/1978 | US4090601 Mining machine conveyor and apparatus for controlling the tension thereon |
| 05/09/1978 | US4088371 Boom stabilizer for an underground mining machine |
| 05/02/1978 | US4087131 Drag bit excavation |
| 04/25/1978 | US4085974 Drum cutter |
| 04/18/1978 | US4084854 Drag bit excavation |
| 04/04/1978 | US4082362 Apparatus for coal mining in-cutting and out-cutting |
| 03/21/1978 | US4080002 Locking device for mining machine trim chain take-up |
| 03/21/1978 | US4080001 Take-up for mining machine trim chain |
| 03/14/1978 | US4078452 Drive systems for mining apparatus |
| 02/28/1978 | US4076318 Cutter bit assemblies for coal ploughs |
| 02/28/1978 | US4076317 Device for guying a movable cutting machine |
| 02/28/1978 | US4076316 Continuous mining machine with laterally movable cutter drum member |
| 02/21/1978 | US4074920 Mining apparatus and method for an augered seam |
| 01/31/1978 | US4071095 Methods of and apparatus for winning reef |
| 01/24/1978 | US4070063 Dividing cutting machine |
| 01/10/1978 | US4067620 Rack-driven mining machine with pivotal guide shoe |
| 01/10/1978 | US4067619 Longwall machine guide with detachable cover plate |
| 12/27/1977 | US4065184 Plow cutter assembly |
| 12/20/1977 | US4063781 Apparatus for loading material |
| 12/13/1977 | US4062595 Automatic face transfer linear cutting rotary head continuous mining machine and method |
| 12/06/1977 | US4061399 Mining by insertion of cutting modules into shaft for connection and actuation |
| 11/22/1977 | US4059163 Mine drilling apparatus and method |
| 11/01/1977 | US4056284 Machines for use in mining or tunnelling work |
| 11/01/1977 | US4056189 Material gathering device for a mining machine |
| 10/04/1977 | US4052107 Hydraulic hammers hydraulically driven impactor |
| 09/13/1977 | US4047763 Mining machine with cutter drum having internal drive motors |
| 09/06/1977 | US4046431 Water lubricated bearing assembly for mining machine |
| 09/06/1977 | US4046424 Continuous mining machine with hinged cutter guide extensions |
| 08/30/1977 | US4045089 Apparatus for controlling the position of a mining machine |
| 08/16/1977 | US4041799 Power actuated lazy-tongs arrangement |
| 07/26/1977 | US4037876 Tightening arrangement for longwall mining machine cable and conveyor |
| 07/26/1977 | US4037875 Full face miner |
| 07/19/1977 | US4036529 Support system for a unitized pair of auger conveyors |
| 07/12/1977 | US4035025 Mineral winning ploughs |
| 07/05/1977 | US4033626 Method and apparatus for controlling a tunneling machine |
| 06/07/1977 | US4027918 Longwall coal mining machine with plural cutters on sub-ranging arm |
| 05/24/1977 | US4025117 Coal planer |
| 05/24/1977 | US4025116 Method of operating a constant depth linear cutting head on a retrofitted continuous mining machine |
| 05/03/1977 | US4021076 Wire communications channel for a pair of unitized augers |
| 05/03/1977 | US4021075 Excavators |
| 04/05/1977 | US4015674 Apparatus for unitizing a pair of augers |
| 03/29/1977 | US4014574 Mining machine having rectangular thrust transmitting conveyor column |
| 03/22/1977 | US4013320 Hook plough apparatus for longwall mining |
| 03/15/1977 | US4012077 Linear cutting rotary head continuous mining machine |
| 02/15/1977 | US4007965 Method of recovering useful minerals from subterranean deposits thereof |
| 01/18/1977 | US4003602 Method and apparatus for in-cutting and out-cutting during coal mining |
| 12/28/1976 | US3999805 Articulated support |
| 12/28/1976 | US3999651 Conveyors for use in mining |
| 12/14/1976 | US3997216 Apparatus for continuous mining |
| 12/07/1976 | US3995908 Hydraulic-mechanical coal mining combine |
| 12/07/1976 | US3995907 Underground excavating machine having independently movable half-frames |
| 12/07/1976 | US3995344 Low profile soaking pit machine |
| 11/23/1976 | US3993355 Mining machine having pneumatic conveyance and cutter head floor driven about anchor |
| 10/05/1976 | US3983949 Auger section positioning means |
| 09/28/1976 | US3982688 Earth-moving apparatus |
| 09/21/1976 | US3981540 Rock breaking apparatus |
| 09/14/1976 | US3980342 Auger type mining machine |
| 07/13/1976 | US3968995 Continuous mining machine with a chain drive for the cutting head |
| 07/06/1976 | US3967854 Endless bucket type excavator |
| 06/29/1976 | US3966258 Mining boom linkage for separate sump and swing cutting |
| 06/29/1976 | US3966257 Driving arrangement for rotary mining heads of mining machines |
| 06/22/1976 | US3964265 Method and apparatus for mining and supporting the mine roof |
| 05/18/1976 | US3957305 In situ values extraction |
| 05/04/1976 | US3954299 Longwall mining machine with pivotal body adjustment |
| 04/13/1976 | US3950031 Trim chain take-up sprocket assembly for mining machines and the like |
| 04/13/1976 | US3949815 Shallow-hole kerf boring machine with auger on side-arm elevating assembly |