|  | E |
SECTION E — FIXED CONSTRUCTIONS

EARTH OR ROCK DRILLING; MINING

|  | E21 |
EARTH OR ROCK DRILLING; MINING

|  | E21 |
Note(s) In this class, the following term is used with the meaning indicated: "drilling" covers boring and vice versa.

|  | E21F |
SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINAGE IN OR OF MINES OR TUNNELS [2]

|  | E21F |
Subclass index
VENTILATION | 1/00, 3/00
DRAINAGE | 16/00
SAFETY DEVICES, RESCUE DEVICES | 5/00 - 11/00
TRANSPORT; FILLING-UP | 13/00; 15/00
OTHER METHODS OR DEVICES | 17/00

|  | E21F 1/00 - E21F 3/00 |
Ventilation of mines or tunnels

P:50 |  | E21F 1/00 |
Ventilation of mines or tunnels; Distribution of ventilating currents (ventilating rooms or spaces in general Fulltext... Hierarchy... Expanded...F24F) [2]

|  | E21F 1/02 |
· | Test models (analogue computers therefor Fulltext... Hierarchy... Expanded...G06G 7/50)

|  | E21F 1/04 |
· | Air ducts (suspension devices Fulltext... Hierarchy... Expanded...E21F 17/02)

|  | E21F 1/06 |
· · | Duct connections (tube connections in general Fulltext... Hierarchy... Expanded...F16L)

|  | E21F 1/08 |
· | Ventilation arrangements in connection with air ducts, e.g. arrangements for mounting ventilators (ventilators per se Fulltext... Hierarchy... Expanded...F04D)

|  | E21F 1/10 |
· | Air doors (doors in general Fulltext... Hierarchy... Expanded...E06B)

|  | E21F 1/12 |
· · | Devices for automatically opening air doors

|  | E21F 1/14 |
· | Air partitions; Air locks (dams Fulltext... Hierarchy... Expanded...E21F 17/103; air locks for foundations Fulltext... Hierarchy... Expanded...E02D) [6]

|  | E21F 1/16 |
· | Shaft covers

|  | E21F 1/18 |
· | Gravity-flow ventilation (Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...E21F 1/02-E21F 1/16 take precedence) [2]

P:30 |  | E21F 3/00 |
Cooling or drying of air (air-conditioning rooms or spaces in general Fulltext... Hierarchy... Expanded...F24F)

|  | E21F 5/00 - E21F 13/00 |
Safety devices (flue-gas indicators Fulltext... Hierarchy... Expanded...G01N); Rescue devices

P:10 |  | E21F 5/00 |
Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires (dams Fulltext... Hierarchy... Expanded...E21F 17/103; applying liquids or other fluent materials to surfaces in general Fulltext... Hierarchy... Expanded...B05) [6]

|  | E21F 5/02 |
· | by wetting or spraying

|  | E21F 5/04 |
· · | Spraying barriers (spray nipples, spraying in general Fulltext... Hierarchy... Expanded...B05B, Fulltext... Hierarchy... Expanded...B05D; picks with arrangement of fluid-spraying nozzles Fulltext... Hierarchy... Expanded...E21C 35/187)

|  | E21F 5/06 |
· · | Fluids used for spraying

|  | E21F 5/08 |
· | Rock dusting; Depositing other protective substances

|  | E21F 5/10 |
· · | Devices for rock dusting

|  | E21F 5/12 |
· · | Composition of rock dust

|  | E21F 5/14 |
· | Fluid barriers or rock dusters made to work by, or at the same time as, shots or explosions

|  | E21F 5/16 |
· | Layers of hygroscopic or other salts deposited on floors, walls, or the like, for binding dust; Deposition of such layers (dust-absorbing materials in general Fulltext... Hierarchy... Expanded...C09K 3/22)

|  | E21F 5/18 |
· | Impregnating walls, or the like, with liquids for binding dust

|  | E21F 5/20 |
· | Drawing-off or depositing dust (methods or apparatus for flushing boreholes Fulltext... Hierarchy... Expanded...E21B 21/00; while slitting Fulltext... Hierarchy... Expanded...E21C 35/22) [1,7]

P:40 |  | E21F 7/00 |
Methods or devices for drawing-off gases with or without subsequent use of the gas for any purpose

P:0 |  | E21F 9/00 |
Devices preventing sparking of machines or apparatus (preventing sparking of electric machines or apparatus Fulltext... Hierarchy... Expanded...H01K, Fulltext... Hierarchy... Expanded...H02K)

P:20 |  | E21F 11/00 |
Rescue devices or other safety devices, e.g. safety chambers, escape ways (breathing aids for curative purposes Fulltext... Hierarchy... Expanded...A61H 31/00; respiratory apparatus Fulltext... Hierarchy... Expanded...A62B 7/00; revival apparatus Fulltext... Hierarchy... Expanded...A62B 33/00)

P:60 |  | E21F 13/00 |
Transport specially adapted to underground conditions (mine cars Fulltext... Hierarchy... Expanded...B61D; transport in general, loading Fulltext... Hierarchy... Expanded...B65G)

|  | E21F 13/02 |
· | in galleries

|  | E21F 13/04 |
· | in gravity inclines; in staple or inclined shafts

|  | E21F 13/06 |
· | at or adjacent to the working face

|  | E21F 13/08 |
· | Shifting conveyers or other transport devices from one location at the working face to another (guiding mining machines along conveyers for the cut mineral Fulltext... Hierarchy... Expanded...E21C 35/12; in combination with mine roof supports for step-by-step movement Fulltext... Hierarchy... Expanded...E21D 23/00)

|  | E21F 13/10 |
· | Anchorings for conveyers [2]

P:70 |  | E21F 15/00 |
Methods or devices for placing filling-up materials in underground workings (dams Fulltext... Hierarchy... Expanded...E21F 17/103) [6]

|  | E21F 15/02 |
· | Supporting means, e.g. shuttering, for filling-up materials

|  | E21F 15/04 |
· · | Stowing mats; Goaf wire netting; Partition walls

|  | E21F 15/06 |
· | Filling-up mechanically

|  | E21F 15/08 |
· | Filling-up hydraulically or pneumatically (hydraulic or pneumatic transport devices Fulltext... Hierarchy... Expanded...B65G; pipes, pipe couplings Fulltext... Hierarchy... Expanded...F16L)

|  | E21F 15/10 |
· · | Hydraulic or pneumatic filling-up machines

P:80 |  | E21F 16/00 |
Drainage (keeping dry foundation sites or other areas in the ground Fulltext... Hierarchy... Expanded...E02D 19/00) [2]

|  | E21F 16/02 |
· | of tunnels [2]

P:90 |  | E21F 17/00 |
Methods or devices for use in mines or tunnels, not covered elsewhere (mine lighting Fulltext... Hierarchy... Expanded...F21, Fulltext... Hierarchy... Expanded...H05B) [2]

|  | E21F 17/02 |
· | Suspension devices for tubes or the like, e.g. for ventilating ducts (supporting pipes, cables or protective tubing in general Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...F16L 3/00-F16L 7/00)

|  | E21F 17/04 |
· | Distributing means for power supply [2]

|  | E21F 17/06 |
· · | Distributing electric power; Cable networks; Conduits for cables (circuit arrangements for supplying or distributing electric power in general Fulltext... Hierarchy... Expanded...H02J)

|  | E21F 17/08 |
· · | Distributing hydraulic power; Pipe networks for hydraulic liquid (pipe-line systems in general Fulltext... Hierarchy... Expanded...F17D)

|  | E21F 17/10 |
· · | Distributing pneumatic power; Pipe networks for compressed air (pipe-line systems in general Fulltext... Hierarchy... Expanded...F17D)

|  | E21F 17/103 |
· | Dams, e.g. for ventilation [6]

|  | E21F 17/107 |
· · | inflatable [6]

|  | E21F 17/12 |
· · | Dam doors

|  | E21F 17/16 |
· | Modification of mine passages or chambers for storage purposes, especially for liquids or gases (storing fluids in natural or artificial cavities or chambers in the earth Fulltext... Hierarchy... Expanded...B65G 5/00)

|  | E21F 17/18 |
· | Special adaptations of signalling or alarm devices (for elevators, escalators or moving walkways Fulltext... Hierarchy... Expanded...B66B; gas-sensitive devices per se Fulltext... Hierarchy... Expanded...G01N)