|  | E |
SECTION E — FIXED CONSTRUCTIONS

EARTH OR ROCK DRILLING; MINING

|  | E21 |
EARTH OR ROCK DRILLING; MINING

|  | E21 |
Note(s) In this class, the following term is used with the meaning indicated: "drilling" covers boring and vice versa.

|  | E21C |
MINING OR QUARRYING

|  | E21C |
Subclass index
CUTTING; SLITTING; DISLODGING |
General structure of machines | 25/00, 27/00
Details | 29/00, 31/00, 35/00
Other devices | 33/00, 37/00, 39/00
METHODS OF MINING OR QUARRYING; OPEN-PIT MINING | 41/00, 45/00; 47/00, 49/00
OBTAINING MINERALS FROM UNDERWATER | 50/00
WINNING MATERIALS FROM EXTRATERRESTRIAL SOURCES | 51/00

|  | E21C 25/00 - E21C 39/00 |
Cutting; Slitting; Dislodging

P:80 |  | E21C 25/00 |
Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam (dislodging machines with slitting means Fulltext... Hierarchy... Expanded...E21C 27/02, Fulltext... Hierarchy... Expanded...E21C 27/10, Fulltext... Hierarchy... Expanded...E21C 27/18)

|  | E21C 25/02 |
· | Machines slitting solely by one or more percussive tools moved through the seam

|  | E21C 25/04 |
· · | Cutting crowns or other tools (percussion drill bits Fulltext... Hierarchy... Expanded...E21B 10/36)

|  | E21C 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

|  | E21C 25/08 |
· · | Mountings for the rods or drums

|  | E21C 25/10 |
· · | Rods; Drums [6]

|  | E21C 25/14 |
· · | with equipment for cleaning the slit (associated with cutter chain machines Fulltext... Hierarchy... Expanded...E21C 25/50)

|  | E21C 25/16 |
· | Machines slitting solely by one or more rotating saws, cutting discs, or wheels

|  | E21C 25/18 |
· · | Saws; Discs; Wheels

|  | E21C 25/20 |
· | Machines slitting solely by one or more reciprocating sawing implements or reciprocating cutter chains; Shaker conveyers with cutting means

|  | E21C 25/22 |
· | Machines slitting solely by one or more cutter chains moving unidirectionally along jibs

|  | E21C 25/24 |
· · | with flat jibs only

|  | E21C 25/26 |
· · | with curved jibs only

|  | E21C 25/28 |
· · | Chains or chain guides [6]

|  | E21C 25/30 |
· · · | Chain guides

|  | E21C 25/32 |
· · · · | specially adapted for curved jibs

|  | E21C 25/34 |
· · · | Chains

|  | E21C 25/36 |
· · · · | Couplings for links

|  | E21C 25/40 |
· · · · | having links with integrally formed picks

|  | E21C 25/50 |
· · | with equipment for cleaning the slit (associated with rotary-rod or rotary-drum machines Fulltext... Hierarchy... Expanded...E21C 25/14)

|  | E21C 25/52 |
· | Machines incorporating two or more of the slitting means according to groups Fulltext... Hierarchy... Expanded...E21C 25/02, Fulltext... Hierarchy... Expanded...E21C 25/06, Fulltext... Hierarchy... Expanded...E21C 25/16, Fulltext... Hierarchy... Expanded...E21C 25/20 and Fulltext... Hierarchy... Expanded...E21C 25/22

|  | E21C 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 Fulltext... Hierarchy... Expanded...E21C 27/32; propulsion by haulage cables Fulltext... Hierarchy... Expanded...E21C 29/14)

|  | E21C 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 Fulltext... Hierarchy... Expanded...E21C 35/14)

|  | E21C 25/58 |
· | Machines slitting by drilling hole on hole

|  | E21C 25/60 |
· | Slitting by jets of water or other liquid (picks with arrangement of fluid-spraying nozzles Fulltext... Hierarchy... Expanded...E21C 35/187; distribution of spraying fluids in rotating cutter-heads Fulltext... Hierarchy... Expanded...E21C 35/23) [6]

|  | E21C 25/62 |
· | Machines for making slits approximately perpendicular to the seams either level with, or above or below the level of, the machine

|  | E21C 25/64 |
· | Slitting machines guided solely by hand and either carried by hand or mounted on supports (hand-held power-operated tools Fulltext... Hierarchy... Expanded...E21C 37/22)

|  | E21C 25/66 |
· | Machines for making slits with additional arrangements for drilling

|  | E21C 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 Fulltext... Hierarchy... Expanded...E21C 27/18; removing chippings Fulltext... Hierarchy... Expanded...E21C 35/20)

P:90 |  | E21C 27/00 |
Machines which completely free the mineral from the seam

|  | E21C 27/01 |
· | specially adapted for removing overhanging coal

|  | E21C 27/02 |
· | solely by slitting (rods, drums, for same Fulltext... Hierarchy... Expanded...E21C 25/10; saws, discs, wheels Fulltext... Hierarchy... Expanded...E21C 25/18; chains, chain guides, for same Fulltext... Hierarchy... Expanded...E21C 25/28)

|  | E21C 27/04 |
· · | by a single chain guided on a frame with or without auxiliary slitting means

|  | E21C 27/06 |
· · · | with a slewing frame

|  | E21C 27/08 |
· · | with additional means for cutting the mineral into blocks

|  | E21C 27/10 |
· | by both slitting and breaking-down

|  | E21C 27/12 |
· · | breaking-down effected by acting on the vertical face of the mineral, e.g. by percussive tools

|  | E21C 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 Fulltext... Hierarchy... Expanded...E21C 37/00)

|  | E21C 27/16 |
· · · | with means for both slitting and breaking-down

|  | E21C 27/18 |
· | by both slitting and planing

|  | E21C 27/20 |
· | Mineral freed by means not involving slitting

|  | E21C 27/22 |
· · | by rotary drills with breaking-down means, e.g. wedge-shaped drills

|  | E21C 27/24 |
· · | by milling means acting on the full working face

|  | E21C 27/26 |
· · | by closely adjacent cutter chains acting on the full working face

|  | E21C 27/28 |
· · | by percussive drills with breaking-down means, e.g. wedge-shaped tools

|  | E21C 27/30 |
· · | by jaws, buckets, or scoops that scoop-out the mineral

|  | E21C 27/32 |
· · | by adjustable or non-adjustable planing means with or without loading arrangements (by percussed planing means Fulltext... Hierarchy... Expanded...E21C 27/46)

|  | E21C 27/34 |
· · · | Machine propelled along the working face by cable or chain

|  | E21C 27/35 |
· · · · | Ram-ploughs

|  | E21C 27/36 |
· · · | Machine self-propelled along the working face

|  | E21C 27/38 |
· · · | Machine stationary while planing in an arc

|  | E21C 27/40 |
· · · | Machine and its planing tool making alternative step-wise movements along the working face

|  | E21C 27/42 |
· · · | combined with scraper or collector box

|  | E21C 27/44 |
· · · | Planing knives (mining picks Fulltext... Hierarchy... Expanded...E21C 35/18)

|  | E21C 27/46 |
· · | by percussed planing means

P:120 |  | E21C 29/00 |
Propulsion of machines for slitting or completely freeing the mineral from the seam

|  | E21C 29/02 |
· | by means on the machine exerting a thrust against fixed supports

|  | E21C 29/04 |
· | by cable or chains

|  | E21C 29/06 |
· · | anchored at one or both ends to the mine working face

|  | E21C 29/08 |
· · · | Anchoring arrangements (for anchoring of conveyers only Fulltext... Hierarchy... Expanded...E21F 13/00)

|  | E21C 29/10 |
· · · | Cable or chain co-operating with a winch or the like on the machine

|  | E21C 29/12 |
· · · | Machines propelled by thrust or pull against a part alternately anchored to, and released from, a cable or chain

|  | E21C 29/14 |
· · | by haulage cable or chain pulling the machine along the working face

|  | E21C 29/16 |
· · · | Winches or other means for pulling cable or chain (winches in general Fulltext... Hierarchy... Expanded...B66D)

|  | E21C 29/18 |
· · · | Coupling and uncoupling machine to cable or chain

|  | E21C 29/20 |
· · | with safety devices operating in the event of breakage of the cable or chain

|  | E21C 29/22 |
· | by wheels, endless tracks, or the like

|  | E21C 29/24 |
· · | Trucks carrying the machine while working

|  | E21C 29/26 |
· · · | with means for adjustably positioning the machine on the truck

|  | E21C 29/28 |
· · · · | adjusting the height of the whole machine

P:100 |  | E21C 31/00 |
Driving means incorporated in machines for slitting or completely freeing the mineral from the seam

|  | E21C 31/02 |
· | for cutting or breaking-down devices

|  | E21C 31/04 |
· · | imparting both a rotary and reciprocating motion

|  | E21C 31/06 |
· · | actuated by an endless cable or chain

|  | E21C 31/08 |
· | for adjusting parts of the machines

|  | E21C 31/10 |
· | for slewing parts of the machines

|  | E21C 31/12 |
· | Component parts

P:110 |  | E21C 33/00 |
Trucks or other devices for transporting machines for slitting or completely freeing the mineral from the seam

|  | E21C 33/02 |
· | with equipment for loading or unloading the machine on to, or from, the truck

P:130 |  | E21C 35/00 |
Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...E21C 25/00-E21C 33/00, Fulltext... Hierarchy... Expanded...E21C 37/00 or Fulltext... Hierarchy... Expanded...E21C 39/00

|  | E21C 35/02 |
· | Locking equipment for slewable parts

|  | E21C 35/04 |
· | Safety devices (operating in the event of breakage of a haulage cable or chain Fulltext... Hierarchy... Expanded...E21C 29/20)

|  | E21C 35/06 |
· | Equipment for positioning the whole machine in relation to its sub-structure

|  | E21C 35/08 |
· | Guiding the machine

|  | E21C 35/10 |
· · | by feelers contacting the working face

|  | E21C 35/12 |
· · | along a conveyer for the cut material

|  | E21C 35/14 |
· · · | Equipment for pressing the conveyer towards the working face

|  | E21C 35/16 |
· · | by making use of the timbering, filling, or other supports

|  | E21C 35/18 |
· | Mining picks; Holders therefor (planing knives Fulltext... Hierarchy... Expanded...E21C 27/44) [6]

|  | E21C 35/183 |
· · | with inserts or layers of wear-resisting material [6]

|  | E21C 35/187 |
· · | with arrangement of fluid-spraying nozzles (supply of fluid to the nozzles Fulltext... Hierarchy... Expanded...E21C 35/22) [6]

|  | E21C 35/19 |
· · | Means for fixing picks or holders [6]

|  | E21C 35/193 |
· · · | using bolts as main fixing elements [6]

|  | E21C 35/197 |
· · · | using sleeves, rings or the like, as main fixing elements [6]

|  | E21C 35/20 |
· | General features of equipment for removal of chippings, e.g. for loading on conveyer

|  | E21C 35/22 |
· | Equipment for preventing the formation of, or for removal of, dust (picks with arrangement of fluid-spraying nozzles Fulltext... Hierarchy... Expanded...E21C 35/187; methods or apparatus for flushing boreholes Fulltext... Hierarchy... Expanded...E21B 21/00)

|  | E21C 35/23 |
· · | Distribution of spraying-fluids in rotating cutter-heads [6]

|  | E21C 35/24 |
· | Remote control specially adapted for machines for slitting or completely freeing the mineral (control in general Fulltext... Hierarchy... Expanded...G05)

P:50 |  | E21C 37/00 |
Other methods or devices for dislodging with or without loading (breaking-down by means inserted in slits Fulltext... Hierarchy... Expanded...E21C 27/14)

|  | E21C 37/02 |
· | by wedges

|  | E21C 37/04 |
· | by devices with parts pressed mechanically against the wall of a borehole

|  | E21C 37/06 |
· | by making use of hydraulic or pneumatic pressure in a borehole

|  | E21C 37/08 |
· · | Devices with pistons, plungers, or the like pressed locally against the wall of the borehole

|  | E21C 37/10 |
· · | Devices with expanding elastic casings

|  | E21C 37/12 |
· · | by injecting into the borehole a liquid, either initially at high pressure or subsequently subjected to high pressure, e.g. by pulses, by explosive cartridges acting on the liquid (slitting by jets of water Fulltext... Hierarchy... Expanded...E21C 25/60; blasting by explosives Fulltext... Hierarchy... Expanded...F42D)

|  | E21C 37/14 |
· · | by compressed air; by gas blast; by gasifying liquids

|  | E21C 37/16 |
· | by fire-setting or by similar methods based on a heat effect (drilling by use of heat Fulltext... Hierarchy... Expanded...E21B 7/14)

|  | E21C 37/18 |
· | by electricity

|  | E21C 37/20 |
· | by ultrasonics

|  | E21C 37/22 |
· | Hand tools or hand-held power-operated tools specially adapted for dislodging minerals (slitting machines guided solely by hand Fulltext... Hierarchy... Expanded...E21C 25/64)

|  | E21C 37/24 |
· · | Pick hammers (pneumatic hammers in general Fulltext... Hierarchy... Expanded...B25D; percussion drilling Fulltext... Hierarchy... Expanded...E21B 1/00)

|  | E21C 37/26 |
· | Chisels or other cutting tools not mentioned before

P:60 |  | E21C 39/00 |
Devices for testing in situ the hardness or other properties of minerals, e.g. for giving information as to the selection of suitable mining tools

|  | E21C 41/00 - E21C 51/00 |
Methods of mining or quarrying; Open-pit mining; Layouts therefor (methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells Fulltext... Hierarchy... Expanded...E21B 43/00)

P:40 |  | E21C 41/00 |
Methods of underground or surface mining (Fulltext... Hierarchy... Expanded...E21C 45/00 takes precedence); Layouts therefor (for peat Fulltext... Hierarchy... Expanded...E21C 49/00) [5]

|  | E21C 41/16 |
· | Methods of underground mining (winning machines therefor Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...E21C 25/00-E21C 39/00); Layouts therefor [5]

|  | E21C 41/18 |
· · | for brown or hard coal [5]

|  | E21C 41/20 |
· · | for rock salt or potash salt [5]

|  | E21C 41/22 |
· · | for ores, e.g. mining placers [5]

|  | E21C 41/24 |
· · | for oil-bearing deposits [5]

|  | E21C 41/26 |
· | Methods of surface mining (machines for obtaining, or the removal of, materials in open-pit mines Fulltext... Hierarchy... Expanded...E21C 47/00); Layouts therefor [5]

|  | E21C 41/28 |
· · | for brown or hard coal [5]

|  | E21C 41/30 |
· · | for ores, e.g. mining placers [5]

|  | E21C 41/32 |
· | Reclamation of surface-mined areas (machines or methods for treating or working soil for agricultural purposes Fulltext... Hierarchy... Expanded...A01B 77/00, Fulltext... Hierarchy... Expanded...A01B 79/00; machines for back-filling Fulltext... Hierarchy... Expanded...E02F 5/22) [5]

P:30 |  | E21C 45/00 |
Methods of hydraulic mining; Hydraulic monitors (Fulltext... Hierarchy... Expanded...E21C 25/60 takes precedence) [5]

|  | E21C 45/02 |
· | Means for generating pulsating fluid jets [5]

|  | E21C 45/04 |
· · | by use of highly pressurised liquid [5]

|  | E21C 45/06 |
· · | by use of compressed gases [5]

|  | E21C 45/08 |
· | Automatic or remote control of hydraulic monitors [5]

P:70 |  | E21C 47/00 |
Machines for obtaining, or the removal of, materials in open-pit mines (obtaining peat Fulltext... Hierarchy... Expanded...E21C 49/00)

|  | E21C 47/02 |
· | for coal, brown coal, or the like (dredgers or soil-shifting machines in general Fulltext... Hierarchy... Expanded...E02F) [3]

|  | E21C 47/04 |
· · | Conveyer bridges used in co-operation with the winning apparatus [3]

|  | E21C 47/06 |
· · | Cableway conveyers used in co-operation with the winning apparatus (underground hauling Fulltext... Hierarchy... Expanded...E21F 13/00)

|  | E21C 47/08 |
· · | Devices for cutting-out partings, e.g. layers of sand between seams of coal

|  | E21C 47/10 |
· | for quarrying stone, sand, gravel, or clay

P:20 |  | E21C 49/00 |
Obtaining peat; Machines therefor (treating peat Fulltext... Hierarchy... Expanded...C10F)

|  | E21C 49/02 |
· | by excavating

|  | E21C 49/04 |
· | by digging in the form of peat sods

P:10 |  | E21C 50/00 |
Obtaining minerals from underwater, not otherwise provided for (suction dredgers or component parts thereof Fulltext... Hierarchy... Expanded...E02F 3/88; equipment for conveying or separating excavated material Fulltext... Hierarchy... Expanded...E02F 7/00; dippers Fulltext... Hierarchy... Expanded...G01N 1/12) [5]

|  | E21C 50/02 |
· | dependent on the ship movements (vessels or floating structures adapted for special purposes Fulltext... Hierarchy... Expanded...B63B 35/00) [5]

P:0 |  | E21C 51/00 |
Apparatus for, or methods of, winning materials from extraterrestrial sources (cosmonautics Fulltext... Hierarchy... Expanded...B64G) [2]