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 E21C 27/02, E21C 27/10, 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 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 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 E21C 25/14)
 E21C 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
 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 E21C 27/32; propulsion by haulage cables 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 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 E21C 35/187; distribution of spraying fluids in rotating cutter-heads 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 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 E21C 27/18; removing chippings 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 E21C 25/10; saws, discs, wheels E21C 25/18; chains, chain guides, for same 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 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 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 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 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 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 E21C 25/00-E21C 33/00, E21C 37/00 or 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 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 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 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 E21C 35/187; methods or apparatus for flushing boreholes 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 G05)
P:50 E21C 37/00
Other methods or devices for dislodging with or without loading (breaking-down by means inserted in slits 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 E21C 25/60; blasting by explosives 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 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 E21C 25/64)
 E21C 37/24
·  ·  Pick hammers (pneumatic hammers in general B25D; percussion drilling 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
P:40 E21C 41/00
Methods of underground or surface mining (E21C 45/00 takes precedence); Layouts therefor (for peat E21C 49/00)  [5]
 E21C 41/16
·  Methods of underground mining (winning machines therefor 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 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 A01B 77/00, A01B 79/00; machines for back-filling E02F 5/22)  [5]
P:30 E21C 45/00
Methods of hydraulic mining; Hydraulic monitors (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 E21C 49/00)
 E21C 47/02
·  for coal, brown coal, or the like (dredgers or soil-shifting machines in general 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 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 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 E02F 3/88; equipment for conveying or separating excavated material E02F 7/00; dippers G01N 1/12)  [5]
 E21C 50/02
·  dependent on the ship movements (vessels or floating structures adapted for special purposes B63B 35/00)  [5]
P:0 E21C 51/00
Apparatus for, or methods of, winning materials from extraterrestrial sources (cosmonautics B64G)  [2]