IPC 6 English version Class E21

IPC ⁶ English version

Class E21

SECTION E

– FIXED CONSTRUCTIONS

EARTH DRILLING; MINING

E 21

EARTH DRILLING; MINING

Note

In this class, the following term is used with the meaning indicated:

–

"drilling" covers boring and vice versa.

E 21 B

EARTH DRILLING, e.g. DEEP DRILLING (mining, quarrying E 21 C; making shafts, driving galleries or tunnels E 21 D); OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS [5]

E 21 C

MINING OR QUARRYING

E 21 D

SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS (soil conditioning or soil stabilising materials C 09 K 17/00; drilling or cutting machines for mining or quarrying E 21 C; safety devices, transport, rescue, ventilation or drainage E 21 F) [2,6]

E 21 F

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