| Patents for E21D 19 - Provisional protective covers for working space (559) |
|---|
| 07/22/1987 | CN86200754U Pushing-and-pulling stand sustained alternatively by beam and pole |
| 06/30/1987 | US4676697 Movable roof support and bolter system |
| 05/05/1987 | US4662685 Device for sealing a drift cross section driven by means of a cutting machine |
| 03/12/1987 | DE3530482A1 Stringer for the forepoling of the roadway support in underground working |
| 10/07/1986 | US4615644 Prestressed tunnel lining |
| 06/17/1986 | US4595316 Automated temporary roof support system for mining equipment |
| 10/15/1985 | US4546849 Machine operators compartment |
| 07/17/1984 | US4460294 Toggle type temporary roof support for mining machinery |
| 12/13/1983 | CA1158448A1 Pivotal roof bolter and extendable rotatable protective canopy for mining machine |
| 07/26/1983 | US4395163 Mining appliance |
| 05/17/1983 | CA1146369A1 Sliding propping gantry |
| 04/12/1983 | US4379660 Method of and apparatus for applying mat to the roof of a mine working |
| 12/28/1982 | CA1138214A2 Pivotable roof bolter for mining machine |
| 11/09/1982 | US4358224 Continuous sliding support gantry for a large passage |
| 11/09/1982 | US4358159 Apparatus for supporting the roof of an underground mine working |
| 09/07/1982 | US4348138 Sliding supporting gallery |
| 07/13/1982 | US4339216 Equipment for laying a layer of elongate material adjacent to an exposed rock or mineral surface in an underground mine |
| 05/11/1982 | US4328994 Mining apparatus and method |
| 02/16/1982 | CA1118458A1 Method of relieving earth pressure in a working area |
| 12/29/1981 | US4307978 Method of relieving earth pressure in a working area |
| 11/24/1981 | US4302133 Device for supporting a gallery or a tunnel |
| 10/27/1981 | US4297057 Pivotal roof bolter and extendable rotatable protective canopy for mining machine |
| 10/14/1981 | EP0037807A1 Temporary roof supporting device for galleries or tunnels |
| 09/08/1981 | CA1108419A1 Device for supporting a gallery or a tunnel |
| 06/23/1981 | CA1103470A1 Mine roof support system |
| 06/10/1981 | EP0029921A1 Process for the protection against falling rocks or coal from the face breast during underground gallery driving |
| 05/05/1981 | US4265570 Mine roof control |
| 04/21/1981 | US4263005 Device for provisionally consolidating a gallery and suitable consolidating frame |
| 02/24/1981 | US4252475 Vehicle mounted temporary roof support |
| 02/17/1981 | US4251168 Fastening means for roof mats for mine workings |
| 02/03/1981 | CA1094833A1 Device for provisionally consolidating a gallery and suitable consolidating frame |
| 10/28/1980 | US4230371 Equipment for laying a layer of elongate material |
| 10/21/1980 | US4229043 Cowl arrangements for mining machines |
| 09/16/1980 | US4222459 Protective scaffold |
| 04/08/1980 | US4196935 Equipment for laying elongate material |
| 02/26/1980 | US4190385 Protective canopy and temporary roof support for mining machinery |
| 02/26/1980 | CA1072352A1 Methods of and apparatus for applying roof mats to mine workings |
| 02/19/1980 | US4189257 Sheltering apparatus for use in long wall mining |
| 12/11/1979 | CA1067711A1 Mine roof support for a mobile drilling machine |
| 11/06/1979 | US4173421 Shield apparatus for use in tunnelling or mining |
| 11/06/1979 | US4173371 Combination cab and canopy for mine roof bolting machine |
| 03/13/1979 | US4143991 Mine roof support system |
| 01/23/1979 | CA1046780A1 Method and apparatus for supporting the roof of an underground mine working |
| 10/31/1978 | US4122682 Methods of and apparatus for applying roof mats to mine workings |
| 07/11/1978 | US4099785 Method and apparatus for supporting the roof of an underground mine working |
| 06/13/1978 | US4094158 Loading gate for mine roof bolter apparatus |
| 03/21/1978 | US4079792 Mine roof support for a mobile drilling machine |
| 09/27/1977 | US4050259 Safety shield and temporary roof support |
| 09/20/1977 | US4048806 Apparatus for, and a method of, driving tunnels |
| 06/14/1977 | US4029361 Longwall mining roof support for double deck machines |
| 05/31/1977 | US4026118 Movable roof support mechanism |
| 05/10/1977 | US4022026 Safety shield attachment |
| 05/03/1977 | US4021075 Excavators |
| 12/14/1976 | US3996753 Mine roof support |
| 09/14/1976 | US3979921 Tunneling shield |
| 09/07/1976 | US3978675 Mine roof support equipment |
| 07/20/1976 | US3969906 Tunnelling shields |
| 06/22/1976 | US3964265 Method and apparatus for mining and supporting the mine roof |
| 02/10/1976 | US3937517 Protective canopy |