| Patents for E21D 9 - Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries (7,097) |
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| 09/20/1977 | US4049112 Chain drum for chain conveyors |
| 09/20/1977 | US4048806 Apparatus for, and a method of, driving tunnels |
| 09/13/1977 | US4047762 Gathering arms for a mining machine |
| 09/13/1977 | US4047761 Mining machine |
| 08/30/1977 | US4045088 Oscillating disk thin seam mining machine with steering |
| 08/30/1977 | US4044565 Apparatus for and a method of laying a pipe line |
| 08/23/1977 | US4043600 Adjustable bucket for an earth boring machine |
| 08/23/1977 | US4043137 Apparatus for and a method of constructing a tunnel |
| 08/16/1977 | US4041713 Method and apparatus for starting a tunneling machine from an initial placement within a vertical shaft sunk into the ground and provided with a starting port |
| 08/09/1977 | US4040669 Self propelled excavating vehicle |
| 08/09/1977 | US4040666 Apparatus and method of shield excavation |
| 08/09/1977 | US4040584 Mounting arrangements for mineral displacing tools |
| 08/09/1977 | US4040493 Rock boring cutter with thread-on replaceable cutting element |
| 08/09/1977 | US4040355 Excavation apparatus and method |
| 07/26/1977 | US4037875 Full face miner |
| 07/12/1977 | US4035024 Hard rock trench cutting machine |
| 07/05/1977 | US4033626 Method and apparatus for controlling a tunneling machine |
| 06/21/1977 | US4030566 Hydraulic system for rock breaker |
| 05/31/1977 | US4027210 Method and control system to limit shifting movement of a winning tool for a tunneling machine |
| 05/24/1977 | US4024721 Method and apparatus for laying pipes in the ground |
| 05/17/1977 | US4023861 Method and apparatus for controlling a tunneling machine |
| 05/10/1977 | US4022029 Useful improvements in apparatus for, and in methods of, constructing a tunnel |
| 04/12/1977 | US4017121 Longwall mining of trona with prefracturing to prevent slabbing |
| 04/05/1977 | US4015979 Bonding of particulate materials |
| 03/22/1977 | US4013319 Tunneling machine with massive guide for impact tools |
| 03/22/1977 | US4013134 Portable earth boring machine with steering head |
| 03/22/1977 | US4012916 Apparatus for constructing underground tunnels |
| 03/01/1977 | US4009909 Upward tunneling |
| 03/01/1977 | US4009579 Method for constructing a tunnel or underpass |
| 02/22/1977 | US4008922 Method and a machine for advancing an underground face of a geological formation |
| 02/15/1977 | US4007693 Trackless train system |
| 02/01/1977 | US4005905 Excavating machine |
| 01/25/1977 | US4004737 Continuous high velocity fluid jet system |
| 01/25/1977 | US4004645 Disc cutting units for use on rock boring machines |
| 01/25/1977 | US4004644 Roller cutter |
| 01/18/1977 | US4003440 Apparatus and process for drilling underground arcuate paths utilizing directional drill and following liner |
| 01/18/1977 | US4003429 Apparatus for loading gas-conveyed particulate solids into a borehole |
| 01/18/1977 | US4003211 Methods and apparatus for constructing tunnels |
| 12/28/1976 | US3999805 Articulated support |
| 12/28/1976 | US3999616 Method and apparatus for establishing the drilling line of an overhead boring machine |
| 12/28/1976 | US3999384 Thrust generator |
| 12/21/1976 | US3998493 Combined milling and impact apparatus for tunneling |
| 12/21/1976 | US3998067 Continuous shoring machines for tunnel construction |
| 12/21/1976 | US3998066 Tunnel shield |
| 12/14/1976 | US3996758 Method for placement of production casing under obstacle |
| 12/14/1976 | US3996751 Method of blasting and reinforcing rock cavities |
| 12/07/1976 | US3995908 Hydraulic-mechanical coal mining combine |
| 12/07/1976 | US3995907 Underground excavating machine having independently movable half-frames |
| 12/07/1976 | US3995829 Tube driving apparatus |
| 11/30/1976 | US3994139 Apparatus for and a method of laying a pipe line |
| 11/16/1976 | US3991886 Shaft mucker |
| 11/09/1976 | US3990746 Apparatus for and a method of storing and transporting lining sections in an underground tunnel driving installation |
| 11/09/1976 | US3990371 California type platform |
| 11/02/1976 | US3989303 Tunneling machine |
| 11/02/1976 | US3989302 Continuous roof support system for tunnel boring |
| 11/02/1976 | US3989115 Adjustable gage cutter scraper for tunneling machines |
| 10/19/1976 | US3986568 Apparatus for making underground passages |
| 10/12/1976 | US3985390 Tunnel excavator |
| 10/05/1976 | US3984015 Crushed rock loading machine |
| 09/28/1976 | US3982595 Rock boring cutter with replaceable cutting elements |
| 09/21/1976 | US3981540 Rock breaking apparatus |
| 09/21/1976 | US3981370 Disc cutting unit for use on rock boring machines |
| 09/14/1976 | US3979921 Tunneling shield |
| 09/14/1976 | US3979920 Sealing means |
| 09/14/1976 | US3979917 Omnidirectional drilling system |
| 09/07/1976 | US3979321 Mixture of liquid crystals exhibiting positive dielectric anisotropy and a wide mesomorphic range |
| 09/07/1976 | US3979151 Rock excavating arched tunnel forming machine |
| 09/07/1976 | US3978675 Mine roof support equipment |
| 08/17/1976 | US3974656 Method and apparatus for excluding water or other material from a blast hole in rock |
| 08/10/1976 | US3973497 Directed-thrust blasting process |
| 08/03/1976 | US3972429 Dividing cutting machine |
| 08/03/1976 | US3972200 Tunnelling and lining machine |
| 07/20/1976 | US3970224 Spoil removal devices for tunnelling machines |
| 07/20/1976 | US3969906 Tunnelling shields |
| 07/13/1976 | US3968655 Method of reinforcing tunnels before excavation |
| 07/06/1976 | US3967463 Continuous tunnel boring machine and method |
| 06/29/1976 | US3966256 Tunneling equipment |
| 06/15/1976 | US3963080 Tunneling machine for boring a side drift |
| 06/08/1976 | US3961825 Tunnelling machine |
| 05/25/1976 | US3958832 Drum mining head with cutter pattern |
| 05/25/1976 | US3958831 Tunnel excavator |
| 05/25/1976 | US3958648 Drilling equipment |
| 05/18/1976 | US3957310 Tunnel boring machine with dual support members |
| 05/18/1976 | US3957124 Tunnel-drilling truck |
| 05/18/1976 | US3956900 Method for consolidating coal and/or rock in mining |
| 05/11/1976 | US3955373 Tunnelling shields |
| 04/27/1976 | US3952815 Land erosion protection on a rock cutter |
| 04/27/1976 | US3952656 Device and process |
| 04/27/1976 | US3952384 Pipe jacks |
| 04/20/1976 | US3950956 Driving of tunnels |
| 04/06/1976 | US3948055 Method for controlling stress and increasing the strength of support members in coal mines |
| 03/30/1976 | US3946605 Apparatus and method of measuring fluctuations of excavated mud amount in a slurry line |
| 03/23/1976 | USRE28741 Mining machine gatherer with fence and arcuate disc vanes |
| 03/23/1976 | US3945443 Steerable rock boring head for earth boring machines |
| 03/16/1976 | US3943722 Ground freezing method |
| 02/24/1976 | US3939777 Mobile trackway |
| 01/27/1976 | US3934420 Method of sealing the rock around a rock chamber intended for a medium, the temperature of which is below the natural temperature of the rock |