Patents for E21C 35 - Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups , or (6,127) |
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10/05/1976 | US3984147 Mining machines with extensible probe arm |
09/28/1976 | US3982688 Earth-moving apparatus |
09/14/1976 | US3980340 Method for longwall mining with side-by-side arch sections |
09/14/1976 | US3980338 Method and apparatus for controlling water sprays of an underground extraction machine |
08/17/1976 | US3975056 Longwall canted drum mining machine |
08/17/1976 | US3974907 Flexible mobile conveyor |
07/20/1976 | US3970353 Locking clip |
07/13/1976 | US3968754 Chain drive arrangement for a mining machine |
06/29/1976 | US3967180 Power supply system for extraction machine, especially a drum-cutting machine |
06/29/1976 | US3965797 Control systems and arrangements for use in mineral mining installations |
06/01/1976 | US3961307 Exploration of the boundaries of an underground coal seam |
06/01/1976 | US3960408 Tunnel layout for longwall mining using shields |
05/25/1976 | US3958830 Longwall mining system and archshield for mining tar sands, oil shales and the like |
05/18/1976 | US3957311 Scraper chain conveyor with ventilation parts |
05/18/1976 | US3957307 Rough cutter mining tool |
05/18/1976 | US3957305 In situ values extraction |
05/18/1976 | US3957076 Monorail transportation system |
05/11/1976 | US3955593 Conveyor for flexible slurry hose |
05/04/1976 | US3954302 Apparatus for ventilating cutter heads of mineral mining machines |
05/04/1976 | US3954300 Mining machine longwall propulsion means |
05/04/1976 | US3954299 Longwall mining machine with pivotal body adjustment |
04/20/1976 | US3950948 Automatic remote control apparatus |
03/23/1976 | US3945681 Cutter assembly |
03/09/1976 | US3942838 Bit coupling means |
02/24/1976 | US3940754 Fluid detector device in a drive motor for an underground mining machine |
02/10/1976 | US3937517 Protective canopy |
02/10/1976 | US3937151 Mineral mining equipment |