| Patents for E21C 31 - Driving means incorporated in machines for slitting or completely freeing the mineral from the seam (738) |
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| 02/05/1980 | CA1071247A1 Take-up for mining machine trim chain |
| 11/27/1979 | CA1067109A1 Locking device for mining machine trim chain |
| 10/30/1979 | US4172616 Cutting head with self-contained power source |
| 10/16/1979 | US4171148 Continuous boring or cutting machine |
| 10/09/1979 | CA1064060A1 Percussive tool mount |
| 09/04/1979 | US4166652 Mining machine, particularly for the working of low mine seams |
| 09/04/1979 | CA1061813A1 Manipulable tool mount |
| 09/04/1979 | CA1061811A1 Method for cutting minerals and cutting machine |
| 07/24/1979 | US4162103 Drive arrangements for mining machines |
| 07/03/1979 | US4159852 Continuous mining machine with improved cutter head slide means |
| 05/22/1979 | US4155598 Longwall mining machine |
| 04/03/1979 | US4147391 Swivel mechanism for kerf-cutting machines |
| 03/06/1979 | CA1050054A1 Cutting machine |
| 03/06/1979 | CA1050053A1 Dividing cutting machine |
| 02/27/1979 | US4141594 Manipulable tool mount |
| 02/20/1979 | US4140951 Mining machine |
| 01/09/1979 | US4133582 Low profile mining machine |
| 12/12/1978 | CA1044260A1 Mining machine |
| 09/05/1978 | US4111488 Method for cutting minerals and cutting machine |
| 08/15/1978 | US4106815 Mining machines |
| 07/04/1978 | US4098539 Cutting machine |
| 04/25/1978 | US4085974 Drum cutter |
| 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 |
| 01/24/1978 | US4070063 Dividing cutting machine |
| 12/13/1977 | US4062593 Mining machines |
| 09/20/1977 | US4049112 Chain drum for chain conveyors |
| 09/13/1977 | US4047763 Mining machine with cutter drum having internal drive motors |
| 08/30/1977 | US4045088 Oscillating disk thin seam mining machine with steering |
| 08/09/1977 | US4040584 Mounting arrangements for mineral displacing tools |
| 05/24/1977 | US4025118 Spill-plate apparatus for a mining machine |
| 11/16/1976 | US3992060 Conveying apparatus |
| 07/13/1976 | US3968995 Continuous mining machine with a chain drive for the cutting head |
| 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 |
| 04/13/1976 | US3950031 Trim chain take-up sprocket assembly for mining machines and the like |
| 02/24/1976 | US3940754 Fluid detector device in a drive motor for an underground mining machine |