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CPC
COOPERATIVE PATENT CLASSIFICATION
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E21F
SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
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Guide Heading:
Ventilation of mines or tunnels
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E21F 1/00
Ventilation of mines or tunnels; Distribution of ventilating currents (ventilating rooms or spaces in general F24F)
E21F 1/003
.
{
Ventilation of traffic tunnels (during construction E21F 1/04 to E21F 3/00)
}
E21F 1/006
.
{
Ventilation at the working face of galleries or tunnels
}
E21F 1/02
.
Test models (analogue computers therefor G06G 7/50)
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E21F 1/04
.
Air ducts (suspension devices E21F 17/02)
E21F 1/06
. .
Duct connections (tube connections in general F16L)
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E21F 1/08
.
Ventilation arrangements in connection with air ducts, e.g. arrangements for mounting ventilators (
{
E21F 1/003 takes precedence
}
; ventilators in general F04D)
E21F 1/085
. .
{
using compressed gas injectors
}
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E21F 1/10
.
Air doors (
{
E21F 1/003 takes precedence; air locks E21F 1/145; dam doors E21F 17/12
}
; doors in general E06B)
E21F 1/12
. .
Devices for automatically opening air doors
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E21F 1/14
.
Air partitions; Air locks (
{
E21F 1/003 takes precedence
}
; dams E21F 17/103; air locks for foundations E02D)
E21F 1/145
. .
{
Air locks (air doors E21F 1/10; dam doors E21F 17/12)
}
E21F 1/16
.
Shaft covers
E21F 1/18
.
Gravity flow ventilation (E21F 1/02 to E21F 1/16 take precedence)
E21F 3/00
Cooling or drying of air (air-conditioning rooms or spaces in general F24F)
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Guide Heading:
Safety devices (flue-gas indicators G01N); Rescue devices
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E21F 5/00
Means or methods for preventing, binding, depositing, or removing dust
{
(in combination with mining machines E21C 35/22)
}
; Preventing explosions or fires (dams E21F 17/103; applying liquids or other fluent materials to surfaces in general B05)
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E21F 5/02
.
by wetting or spraying
E21F 5/04
. .
Spraying barriers (spray nipples, spraying in general B05B, B05D; picks with arrangements of fluid-spraying nozzles E21C 35/187)
E21F 5/06
. .
Fluids used for spraying
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E21F 5/08
.
Rock dusting of mines; Depositing other protective substances
E21F 5/10
. .
Devices for rock dusting
E21F 5/12
. .
Composition of rock dust
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E21F 5/14
.
Fluid barriers or rock dusters made to work by, or at the same time as, shots or explosions
E21F 5/143
. .
{
Fluid barriers
}
E21F 5/146
. .
{
Rock dusters
}
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 C09K 3/22)
E21F 5/18
.
Impregnating walls, or the like, with liquids for binding dust
{
(injections for improving soil or rock E21D 9/001; borehole closures, i.e. packers, for use during the injection process E21B 33/12)
}
E21F 5/20
.
Drawing-off or depositing dust (dust-removing while drilling E21C 7/00; while slitting E21C 35/22)
E21F 7/00
Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
E21F 9/00
Devices preventing sparking of machines or apparatus (preventing sparking of electric machines or apparatus H01K, H02K)
E21F 11/00
Rescue devices or other safety devices, e.g. safety chambers, escape ways (respiratory apparatus A62B 7/00; revival apparatus A62B 33/00; breathing aids for curative purposes A61H 31/00)
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E21F 13/00
Transport specially adapted to underground conditions (mine cars B61D; transport in general, loading
{
unless specially adapted to underground conditions
}
 B65G)
E21F 13/002
.
{
Crushing devices specifically for conveying in mines
}
E21F 13/004
.
{
Staff transport system
}
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E21F 13/006
.
{
Equipment transport systems
}
E21F 13/008
. .
{
for mine roof support units for step-by-step movement
}
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E21F 13/02
.
{
Transport of mined mineral
}
 in galleries
E21F 13/025
. .
{
Shuttle cars
}
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E21F 13/04
.
{
Transport of mined material
}
 in gravity inclines; in staple or inclined shafts
E21F 13/042
. .
{
Vertical hydraulic conveying of coal (conveying by water flow in general B65G 53/00)
}
E21F 13/045
. .
{
Bunkers specially adapted for mining purposes (chutes in general B65G 11/00)
}
E21F 13/047
. .
{
comprising helically running channels (chutes of helical form in general B65G 11/06)
}
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E21F 13/06
.
{
Transport of mined material
}
 at or adjacent to the working face
E21F 13/061
. .
{
Chutes and braking conveyers for average and steep slopes, adapted for mining purposes (chutes in general B65G 11/00)
}
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E21F 13/063
. .
{
Loading devices for use in mining
}
E21F 13/065
. . .
{
Scrapers (digging devices guided by cables E02F 3/54; combined with planing means E21C 27/42)
}
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E21F 13/066
. .
{
Scraper chain conveyers (in general B65G 19/00)
}
E21F 13/068
. . .
{
Special adaptations for use at the junction of the working face with the gallery, e.g. driving stations coupled to the driving station of the winning machine
}
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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 E21C 35/12; in combination with mine roof supports for step-by-step movement E21D 23/00)
E21F 13/083
. .
{
Conveyer belts removing methods or devices
}
E21F 13/086
. .
{
Armoured conveyers shifting devices
}
E21F 13/10
.
Anchorings for conveyers
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E21F 15/00
Methods or devices for placing filling-up materials in underground workings (dams E21F 17/103;
{
chocks made of flexible containers filled with backfilling material E21D 15/483
}
)
E21F 15/005
.
{
characterised by the kind or composition of the backfilling material
}
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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
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E21F 15/08
.
Filling-up hydraulically or pneumatically (hydraulic or pneumatic transport devices B65G; pipes, pipe couplings F16L)
E21F 15/10
. .
Hydraulic or pneumatic filling-up machines
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E21F 16/00
Drainage (keeping dry foundation sites or other areas in the ground E02D 19/00)
E21F 16/02
.
of tunnels
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E21F 17/00
Methods or devices for use in mines or tunnels, not covered elsewhere (mine lighting F21, H05B)
E21F 17/02
.
Suspension devices for tubes or the like, e.g. for ventilating ducts (supporting pipes, cables or protective tubing in general F16L 3/00 to F16L 7/00)
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E21F 17/04
.
Distributing means for power supply in mines
E21F 17/06
. .
Distributing electric power; Cable networks; Conduits for cables (circuit arrangements for supplying or distributing electric power in general H02J)
E21F 17/08
. .
Distributing hydraulic power; Pipe networks for hydraulic liquid (pipe-line systems in general F17D)
E21F 17/10
. .
Distributing pneumatic power; Pipe networks for compressed air (pipe-line systems in general F17D)
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E21F 17/103
.
Dams, e.g. for ventilation
E21F 17/107
. .
inflatable
E21F 17/12
. .
Dam doors
{
(air doors E21F 1/10; air locks E21F 1/145)
}
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 B65G 5/00)
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E21F 17/18
.
Special adaptations of signalling or alarm devices (for mine lifts B66B; gas-sensitive devices per se G01N)
E21F 17/185
. .
{
Rock-pressure control devices with or without alarm devices; Alarm devices in case of roof subsidence (props with load-measuring devices E21D 15/46)
}
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Last Modified: 04/16/2013 4:31:16 PM