| IPC 7 English version |
| E21C-E21C02746 |
E21C 29/00 - E21C 51/00  |
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| SECTION E – FIXED CONSTRUCTIONS |
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| E 21 | EARTH OR ROCK DRILLING; MINING |
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| E 21 C | MINING OR QUARRYING |
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| Subclass Index |
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| CUTTING; SLITTING; DISLODGING |
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| General structure of machines |
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| Details |
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| Other devices |
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| METHODS OF MINING OR QUARRYING; OPEN-PIT MINING |
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| OBTAINING MINERALS FROM UNDERWATER |
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| WINNING MATERIALS FROM EXTRATERRESTRIAL SOURCES |
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1/ | 00 | (covered by E21B 3/00) |
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1/ | 02 | (covered by E21B 3/00) |
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1/ | 04 | (transferred to E21B 3/035) |
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1/ | 06 | (transferred to E21B 3/025) |
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1/ | 08 | (transferred to E21B 3/03) |
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1/ | 10 | (transferred to E21B 19/08, covered by E21B 3/00, E21B 4/00) |
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1/ | 12 | (transferred to E21B 6/02) |
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3/ | 00 | (covered by E21B 1/00) |
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3/ | 02 | (transferred to E21B 1/36) |
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3/ | 04 | (transferred to E21B 1/38) |
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3/ | 06 | (covered by E21B 1/00) |
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3/ | 08 | (transferred to E21B 1/14) |
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3/ | 10 | (transferred to E21B 1/20) |
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3/ | 12 | (transferred to E21B 1/16) |
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3/ | 14 | (transferred to E21B 1/18) |
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3/ | 16 | (transferred to E21B 1/22) |
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3/ | 18 | (transferred to E21B 1/34) |
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3/ | 20 | (transferred to E21B 1/26) |
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3/ | 22 | (transferred to E21B 1/28) |
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3/ | 24 | (transferred to E21B 1/30) |
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3/ | 26 | (transferred to E21B 1/32) |
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3/ | 28 | (transferred to E21B 1/12, E21B 6/06) |
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3/ | 30 | (transferred to E21B 1/12, E21B 6/08) |
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3/ | 32 | (transferred to E21B 44/00) |
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3/ | 34 | (transferred to E21B 17/03) |
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5/ | 00 | (transferred to E21B 19/08) |
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5/ | 02 | (transferred to E21B 19/081) |
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5/ | 04 | (transferred to E21B 19/083) |
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5/ | 06 | (transferred to E21B 19/084) |
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5/ | 08 | (transferred to E21B 19/08) |
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5/ | 10 | (transferred to E21B 19/086, E21B 19/087) |
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5/ | 11 | (transferred to E21B 19/086, E21B 19/087) |
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5/ | 12 | (transferred to E21B 19/089) |
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5/ | 14 | (transferred to E21B 44/08) |
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5/ | 16 | (transferred to E21B 44/00) |
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7/ | 00 | to |
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7/ | 04 | (transferred to E21B 21/00) |
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7/ | 06 | (covered by E21B 21/14) |
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7/ | 08 | to |
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7/ | 10 | (transferred to E21B 21/00) |
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7/ | 12 | (transferred to E21B 21/18) |
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9/ | 00 | (transferred to E21B 19/24) |
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11/ | 00 | (transferred to E21B 7/02, E21B 15/00, E21B 19/08) |
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11/ | 02 | (transferred to E21B 7/02, E21B 15/00, E21B 19/08) |
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| Cutting; Slitting; Dislodging |
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25/ | 00 | Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam (dislodging machines with slitting means E21C 27/02, E21C 27/10, E21C 27/18) |
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25/ | 02 | . | Machines slitting solely by one or more percussive tools moved through the seam |
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25/ | 04 | . | . | Cutting crowns or other tools (percussion drill bits E21B 10/36) |
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25/ | 06 | . | Machines slitting solely by one or more cutting rods or cutting drums which rotate, move through the seam, and may or may not reciprocate |
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25/ | 08 | . | . | Mountings for the rods or drums |
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25/ | 10 | . | . | Rods; Drums [6] |
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25/ | 14 | . | . | with equipment for cleaning the slit (associated with cutter chain machines E21C 25/50) |
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25/ | 16 | . | Machines slitting solely by one or more rotating saws, cutting discs, or wheels |
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25/ | 18 | . | . | Saws; Discs; Wheels |
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25/ | 20 | . | Machines slitting solely by one or more reciprocating sawing implements or reciprocating cutter chains; Shaker conveyers with cutting means |
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25/ | 22 | . | Machines slitting solely by one or more cutter chains moving unidirectionally along jibs |
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25/ | 24 | . | . | with flat jibs only |
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25/ | 26 | . | . | with curved jibs only |
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25/ | 28 | . | . | Chains or chain guides [6] |
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25/ | 30 | . | . | . | Chain guides |
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25/ | 32 | . | . | . | . | specially adapted for curved jibs |
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25/ | 34 | . | . | . | Chains |
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25/ | 36 | . | . | . | . | Couplings for links |
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25/ | 40 | . | . | . | . | having links with integrally formed picks |
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25/ | 50 | . | . | with equipment for cleaning the slit (associated with rotary-rod or rotary-drum machines E21C 25/14) |
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25/ | 52 | . | Machines incorporating two or more of the slitting means according to groups E21C 25/02, E21C 25/06, E21C 25/16, E21C 25/20 and E21C 25/22 |
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25/ | 54 | . | Slitting by unguided cutter cables or cutter chains or by unguided tools drawn along the working face by cables or the like (dislodging by planing means E21C 27/32; propulsion by haulage cables E21C 29/14) |
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25/ | 56 | . | Slitting by cutter cables or cutter chains or by tools drawn along the working face by cables or the like, in each case guided parallel to the face, e.g. by a conveyer, by a guide parallel to a conveyer (pressing the conveyer equipped with tools toward the working face E21C 35/14) |
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25/ | 58 | . | Machines slitting by drilling hole on hole |
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25/ | 60 | . | Slitting by jets of water or other liquid (picks with arrangement of fluid-spraying nozzles E21C 35/187; distribution of spraying fluids in rotating cutter-heads E21C 35/23) [6] |
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25/ | 62 | . | Machines for making slits approximately perpendicular to the seams either level with, or above or below the level of, the machine |
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25/ | 64 | . | Slitting machines guided solely by hand and either carried by hand or mounted on supports (hand-held power-operated tools E21C 37/22) |
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25/ | 66 | . | Machines for making slits with additional arrangements for drilling |
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25/ | 68 | . | Machines for making slits combined with equipment for removing, e.g. by loading, material won by other means (slitting machines combined with planing means E21C 27/18; removing chippings E21C 35/20) |
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27/ | 00 | Machines which completely free the mineral from the seam |
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27/ | 01 | . | specially adapted for removing overhanging coal |
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27/ | 02 | . | solely by slitting (rods, drums, for same E21C 25/10; saws, discs, wheels E21C 25/18; chains, chain guides, for same E21C 25/28) |
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27/ | 04 | . | . | by a single chain guided on a frame with or without auxiliary slitting means |
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27/ | 06 | . | . | . | with a slewing frame |
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27/ | 08 | . | . | with additional means for cutting the mineral into blocks |
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27/ | 10 | . | by both slitting and breaking-down |
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27/ | 12 | . | . | breaking-down effected by acting on the vertical face of the mineral, e.g. by percussive tools |
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27/ | 14 | . | . | breaking-down effected by force or pressure applied to side of slit, e.g. by wedges (breaking-down by means inserted in boreholes E21C 37/00) |
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27/ | 16 | . | . | . | with means for both slitting and breaking-down |
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27/ | 18 | . | by both slitting and planing |
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27/ | 20 | . | Mineral freed by means not involving slitting |
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27/ | 22 | . | . | by rotary drills with breaking-down means, e.g. wedge-shaped drills |
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27/ | 24 | . | . | by milling means acting on the full working face |
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27/ | 26 | . | . | by closely adjacent cutter chains acting on the full working face |
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27/ | 28 | . | . | by percussive drills with breaking-down means, e.g. wedge-shaped tools |
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27/ | 30 | . | . | by jaws, buckets, or scoops that scoop-out the mineral |
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27/ | 32 | . | . | by adjustable or non-adjustable planing means with or without loading arrangements (by percussed planing means E21C 27/46) |
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27/ | 34 | . | . | . | Machine propelled along the working face by cable or chain |
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27/ | 35 | . | . | . | . | Ram-ploughs |
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27/ | 36 | . | . | . | Machine self-propelled along the working face |
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27/ | 38 | . | . | . | Machine stationary while planing in an arc |
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27/ | 40 | . | . | . | Machine and its planing tool making alternative step-wise movements along the working face |
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27/ | 42 | . | . | . | combined with scraper or collector box |
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27/ | 44 | . | . | . | Planing knives (mining picks E21C 35/18) |
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27/ | 46 | . | . | by percussed planing means |
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 | E21C 29/00 - E21C 51/00 |
