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IPC 7
E21F-E21F01718

SECTION E – FIXED CONSTRUCTIONS


E 21EARTH OR ROCK DRILLING; MINING


E 21 FSAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINAGE IN OR OF MINES OR TUNNELS  [2]


Subclass Index

VENTILATION 

E21F 1/00, E21F 3/00 

DRAINAGE 

E21F 16/00 

SAFETY DEVICES, RESCUE DEVICES 

E21F 5/00 to E21F 11/00 

TRANSPORT; FILLING-UP 

E21F 13/00; E21F 15/00 

OTHER METHODS OR DEVICES 

E21F 17/00 



Ventilation of mines or tunnels


1/

00Ventilation of mines or tunnels; Distribution of ventilating currents (ventilating rooms or spaces in general F24F) [2]

1/

02.Test models (analogue computers therefor G06G 7/50)

1/

04.Air ducts (suspension devices E21F 17/02)

1/

06..Duct connections (tube connections in general F16L)

1/

08.Ventilation arrangements in connection with air ducts, e.g. arrangements for mounting ventilators (ventilators per se F04D)

1/

10.Air doors (doors in general E06B)

1/

12..Devices for automatically opening air doors

1/

14.Air partitions; Air locks (dams E21F 17/103; air locks for foundations E02D)  [6]

1/

16.Shaft covers

1/

18.Gravity-flow ventilation (E21F 1/02 to E21F 1/16 take precedence)  [2]


3/

00Cooling or drying of air (air-conditioning rooms or spaces in general F24F)


Safety devices (flue-gas indicators G01N); Rescue devices


5/

00Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires (dams E21F 17/103; applying liquids or other fluent materials to surfaces in general B05) [6]

5/

02.by wetting or spraying

5/

04..Spraying barriers (spray nipples, spraying in general B05B, B05D; picks with arrangement of fluid-spraying nozzles E21C 35/187)

5/

06..Fluids used for spraying

5/

08.Rock dusting; Depositing other protective substances

5/

10..Devices for rock dusting

5/

12..Composition of rock dust

5/

14.Fluid barriers or rock dusters made to work by, or at the same time as, shots or explosions

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)

5/

18.Impregnating walls, or the like, with liquids for binding dust

5/

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


7/

00Methods or devices for drawing-off gases with or without subsequent use of the gas for any purpose


9/

00Devices preventing sparking of machines or apparatus (preventing sparking of electric machines or apparatus H01K, H02K)


11/

00Rescue devices or other safety devices, e.g. safety chambers, escape ways (breathing aids for curative purposes A61H 31/00; respiratory apparatus A62B 7/00; revival apparatus A62B 33/00)


13/

00Transport specially adapted to underground conditions (mine cars B61D; transport in general, loading B65G)

13/

02.in galleries

13/

04.in gravity inclines; in staple or inclined shafts

13/

06.at or adjacent to the working face

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)

13/

10.Anchorings for conveyers  [2]



15/

00Methods or devices for placing filling-up materials in underground workings (dams E21F 17/103) [6]

15/

02.Supporting means, e.g. shuttering, for filling-up materials

15/

04..Stowing mats; Goaf wire netting; Partition walls

15/

06.Filling-up mechanically

15/

08.Filling-up hydraulically or pneumatically (hydraulic or pneumatic transport devices B65G; pipes, pipe couplings F16L)

15/

10..Hydraulic or pneumatic filling-up machines


16/

00Drainage (keeping dry foundation sites or other areas in the ground E02D 19/00) [2]

16/

02.of tunnels  [2]


17/

00Methods or devices for use in mines or tunnels, not covered elsewhere (mine lighting F21, H05B) [2]

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)

17/

04.Distributing means for power supply  [2]

17/

06..Distributing electric power; Cable networks; Conduits for cables (circuit arrangements for supplying or distributing electric power in general H02J)

17/

08..Distributing hydraulic power; Pipe networks for hydraulic liquid (pipe-line systems in general F17D)

17/

10..Distributing pneumatic power; Pipe networks for compressed air (pipe-line systems in general F17D)

17/

103.Dams, e.g. for ventilation  [6]

17/

107..inflatable  [6]

17/

12..Dam doors

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)

17/

18.Special adaptations of signalling or alarm devices (for elevators, escalators or moving walkways B66B; gas-sensitive devices per se G01N)


  
 

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