1. CPC Sections
  2. CPC Section E
  3. CPC Class E21
  4. CPC Subclass E21F
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CPC
COOPERATIVE PATENT CLASSIFICATION
​
E21F
SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS [2018-08]
WARNING

  • In this subclass non-limiting references (in the sense of paragraph 39 of the Guide to the IPC) may still be displayed in the scheme.
Ventilation of mines or tunnels [2013-01]
E21F 1/00
Ventilation of mines or tunnels; Distribution of ventilating currents (ventilating rooms or spaces in general F24F) [2013-01]
E21F 1/003
.
{Ventilation of traffic tunnels (during construction E21F 1/04 - E21F 3/00)} [2016-05]
E21F 1/006
.
{Ventilation at the working face of galleries or tunnels} [2013-01]
E21F 1/02
.
Test models (analogue computers therefor G06G 7/50) [2013-01]
E21F 1/04
.
Air ducts (suspension devices E21F 17/02) [2013-01]
E21F 1/06
. .
Duct connections (tube connections in general F16L) [2013-01]
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) [2013-01]
E21F 1/085
. .
{using compressed gas injectors} [2013-01]
E21F 1/10
.
Air doors ({E21F 1/003 takes precedence; air locks E21F 1/145; dam doors E21F 17/12}; doors in general E06B) [2013-01]
E21F 1/12
. .
Devices for automatically opening air doors [2013-01]
E21F 1/14
.
Air partitions; Air locks ({E21F 1/003 takes precedence}; dams E21F 17/103; air locks for foundations E02D) [2013-01]
E21F 1/145
. .
{Air locks (air doors E21F 1/10; dam doors E21F 17/12)} [2013-01]
E21F 1/16
.
Shaft covers [2013-01]
E21F 1/18
.
Gravity flow ventilation (E21F 1/02 - E21F 1/16 take precedence) [2016-05]
E21F 3/00
Cooling or drying of air (air-conditioning rooms or spaces in general F24F) [2013-01]
Safety devices (flue-gas indicators G01N); Rescue devices [2013-01]
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) [2013-01]
E21F 5/02
.
by wetting or spraying [2013-01]
E21F 5/04
. .
Spraying barriers (spray nipples, spraying in general B05B, B05D; picks with arrangements of fluid-spraying nozzles E21C 35/187) [2013-01]
E21F 5/06
. .
Fluids used for spraying [2013-01]
E21F 5/08
.
Rock dusting of mines; Depositing other protective substances [2013-01]
E21F 5/10
. .
Devices for rock dusting [2013-01]
E21F 5/12
. .
Composition of rock dust [2013-01]
E21F 5/14
.
Fluid barriers or rock dusters made to work by, or at the same time as, shots or explosions [2013-01]
E21F 5/143
. .
{Fluid barriers} [2013-01]
E21F 5/146
. .
{Rock dusters} [2013-01]
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) [2013-01]
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)} [2013-01]
E21F 5/20
.
Drawing-off or depositing dust ({dust-removing while drilling E21B 21/011}; while slitting E21C 35/22) [2020-05]
E21F 7/00
Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose [2013-01]
E21F 9/00
Devices preventing sparking of machines or apparatus (preventing sparking of electric machines or apparatus H01K, H02K) [2013-01]
E21F 11/00
Rescue devices or other safety devices, e.g. safety chambers or escape ways (breathing aids for curative purposes A61H 31/00; respiratory apparatus A62B 7/00; breathing apparatus for accidentally buried persons A62B 33/00) [2018-08]
E21F 13/00
Transport specially adapted to underground conditions (mine cars B61D; transport in general, loading {unless specially adapted to underground conditions} B65G) [2013-01]
E21F 13/002
.
{Crushing devices specifically for conveying in mines} [2013-01]
E21F 13/004
.
{Staff transport system} [2013-01]
E21F 13/006
.
{Equipment transport systems} [2013-01]
E21F 13/008
. .
{for mine roof support units for step-by-step movement} [2013-01]
E21F 13/02
.
{Transport of mined mineral} in galleries [2013-01]
E21F 13/025
. .
{Shuttle cars} [2013-01]
E21F 13/04
.
{Transport of mined material} in gravity inclines; in staple or inclined shafts [2013-01]
E21F 13/042
. .
{Vertical hydraulic conveying of coal (conveying by water flow in general B65G 53/00)} [2013-01]
E21F 13/045
. .
{Bunkers specially adapted for mining purposes (chutes in general B65G 11/00)} [2013-01]
E21F 13/047
. .
{comprising helically running channels (chutes of helical form in general B65G 11/06)} [2013-01]
E21F 13/06
.
{Transport of mined material} at or adjacent to the working face [2013-01]
E21F 13/061
. .
{Chutes and braking conveyors for average and steep slopes, adapted for mining purposes (chutes in general B65G 11/00)} [2016-05]
E21F 13/063
. .
{Loading devices for use in mining} [2013-01]
E21F 13/065
. . .
{Scrapers (digging devices guided by cables E02F 3/54; combined with planing means E21C 27/42)} [2013-01]
E21F 13/066
. .
{Scraper chain conveyors (in general B65G 19/00)} [2016-05]
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} [2013-01]
E21F 13/08
.
Shifting conveyors or other transport devices from one location at the working face to another (guiding mining machines along conveyors for the cut mineral E21C 35/12; in combination with mine roof supports for step-by-step movement E21D 23/00) [2016-05]
E21F 13/083
. .
{Conveyor belts removing methods or devices} [2016-05]
E21F 13/086
. .
{Armoured conveyors shifting devices} [2016-05]
E21F 13/10
.
Anchorings for conveyors [2016-05]
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}) [2017-08]
E21F 15/005
.
{characterised by the kind or composition of the backfilling material} [2013-01]
E21F 15/02
.
Supporting means, e.g. shuttering, for filling-up materials [2013-01]
E21F 15/04
. .
Stowing mats; Goaf wire netting; Partition walls [2013-01]
E21F 15/06
.
Filling-up mechanically [2013-01]
E21F 15/08
.
Filling-up hydraulically or pneumatically (hydraulic or pneumatic transport devices B65G; pipes, pipe couplings F16L) [2013-01]
E21F 15/10
. .
Hydraulic or pneumatic filling-up machines [2013-01]
E21F 16/00
Drainage (keeping dry foundation sites or other areas in the ground E02D 19/00) [2013-01]
E21F 16/02
.
of tunnels [2013-01]
E21F 17/00
Methods or devices for use in mines or tunnels, not covered elsewhere (mine lighting F21, H05B) [2013-01]
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 - F16L 7/00) [2016-05]
E21F 17/04
.
Distributing means for power supply in mines [2013-01]
E21F 17/06
. .
Distributing electric power; Cable networks; Conduits for cables (circuit arrangements for supplying or distributing electric power in general H02J) [2013-01]
E21F 17/08
. .
Distributing hydraulic power; Pipe networks for hydraulic liquid (pipe-line systems in general F17D) [2013-01]
E21F 17/10
. .
Distributing pneumatic power; Pipe networks for compressed air (pipe-line systems in general F17D) [2013-01]
E21F 17/103
.
Dams, e.g. for ventilation [2013-01]
E21F 17/107
. .
inflatable [2013-01]
E21F 17/12
. .
Dam doors {(air doors E21F 1/10; air locks E21F 1/145)} [2013-01]
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) [2013-01]
E21F 17/18
.
Special adaptations of signalling or alarm devices (for mine lifts B66B; gas-sensitive devices per se G01N) [2013-01]
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)} [2013-01]