E
SECTION E — FIXED CONSTRUCTIONS
  
BUILDING
 E21
MINING
 E21C
MACHINERY FOR, OR METHODS OF, MINING OR QUARRYING
 E21C 1/00 - 
E21C 3/00
Drilling machines
 E21C 1/00
Rotary-drilling machines (for deep-drilling E21B; for sinking shafts E21D; for tunnelling E01G; for working stone B28D; for working metal B23B; for woodworking B27C)
 E21C 1/02
·  with a continuous rotation of the tool with or without variable speed gearing
 E21C 1/04
·  ·  with slipping or elastic transmission
 E21C 1/06
·  with a to-and-fro rotation of the tool
 E21C 1/08
·  with an intermittent unidirectional rotation of the tool
 E21C 1/10
·  with a built-in feeding device (feeding devices E21C 5/00)
 E21C 1/12
·  with percussive action superimposed on a continuously-rotating tool always in contact with the working face
 E21C 1/14
·  Rotary core-boring machines; Auger drilling machines (blades or crown bits for auger mining machines E21C 13/04)
 E21C 3/00
Drilling machines with reciprocating tool that is intermittently turned when out of contact with the working face (portable percussion tools in general B25D)
 E21C 3/02
·  Machines in which the tool is connected to an impulse member
 E21C 3/04
·  Hammer drilling machines in which the tool is hit by an impulse member
 E21C 3/06
·  Means for driving the impulse member
 E21C 3/08
·  ·  by a rotating mechanism
 E21C 3/10
·  ·  ·  formed as centrifugal hammers
 E21C 3/12
·  ·  ·  with spring-mounted reciprocating masses
 E21C 3/14
·  ·  ·  ·  with elastic joining of the drive to the push-rod by double buffer springs
 E21C 3/16
·  ·  by electromagnets
 E21C 3/18
·  ·  directly by a piston of an internal-combustion engine
 E21C 3/20
·  ·  directly by liquid pressure
 E21C 3/22
·  ·  ·  working with pulses
 E21C 3/24
·  ·  directly by air, steam, or gas pressure
 E21C 3/26
·  ·  ·  working with pulses
 E21C 3/28
·  Intermittent turning of tool obtained by rifled-bar or ratchet device
 E21C 3/30
·  ·  driven by separate motor
 E21C 3/32
·  with arrangements for automatic stopping when the tool is lifted from the working face or suffers excessive bore resistance (pick hammers E21C 37/24)
 E21C 3/34
·  Arrangements for locking the drill to the hammer or to the machine
 E21C 5/00 - 
E21C 23/00
Details of drilling apparatus
 E21C 5/00
Devices for feeding tool to working face (feeding devices for metal-boring machines B23B)
 E21C 5/02
·  Screw-and-nut feed mechanism
 E21C 5/04
·  Cam, rack, or like feed mechanism
 E21C 5/06
·  Flexible drawing means, e.g. cables
 E21C 5/08
·  Means for driving feed mechanism
 E21C 5/10
·  ·  Separate motor, e.g. compressed-air motor or cylinder (E21C 5/11 takes precedence)
 E21C 5/11
·  ·  combined with supporting means, e.g. feed legs
 E21C 5/12
·  ·  Weight or spring drive
 E21C 5/14
·  ·  Automatic feed by jump or recoil of the drilling machine
 E21C 5/16
·  with arrangements for automatically interrupting the feed when the tool suffers excessive bore resistance
 E21C 7/00
Dust eliminating or dust removing while drilling (equipment for preventing the formation of dust by slitting or dislodging machines E21C 35/22; exhausting dust from mines E21F 5/20)
 E21C 7/02
·  by exhausting dust-loaded air
 E21C 7/04
·  using exhaust air from the drill motor for blowing-off the dust
 E21C 7/06
·  by foam
 E21C 7/08
·  by liquids
 E21C 7/10
·  ·  Liquid flushing installations
 E21C 7/12
·  Preventing exhaust air from the drill motor from blowing-off towards the working face
 E21C 9/00
Supporting, guiding or centralising devices for boring rods
 E21C 11/00
Supports or guides for drilling machines; Columns to which the machine is clamped (feed legs E21C 5/11; slitting machines mounted on supports E21C 25/64; guiding, slitting, or dislodging machines E21C 35/08)
 E21C 11/02
·  Drill wagons (trucks for slitting or dislodging machines E21C 29/24)
 E21C 13/00
Drill cutting blades, crown bits, or roller-cutter bits (for deep-drilling E21B 9/00); Wear-resisting inserts for blades or bits (uniting inserts to blades or bits B23, e.g. B23K, B23P 3/26; materials C21D, C22C)
 E21C 13/01
·  Wear-resisting inserts (E21C 13/02, E21C 13/06-E21C 13/12 take precedence; for deep-drilling E21B 9/36)
 E21C 13/02
·  for rotary drilling; for core boring (dislodging machines with rotary drills E21C 27/22; augers for making post-holes for foundation purposes E02D)
 E21C 13/04
·  ·  for auger mining machines with a rotatable and advanceable cutter element having a passage-way for cut material
 E21C 13/06
·  for rotary percussion drilling
 E21C 13/08
·  for percussion drilling
 E21C 13/10
·  for drilling holes for anchor devices
 E21C 13/12
·  for drilling approximately vertical holes of large diameter
 E21C 15/00
Boring rods; Joining rods to one another; Joining rods to driving means; Joining rods to bits; Rods with flushing channels (for deep-drilling E21B 17/00, E21B 21/00)
 E21C 15/02
·  Bit shands; Chisel shanks
 E21C 17/00
Bore reamers
 E21C 19/00
Equipment or accessories for use otherwise than in normal drilling, e.g. in boring test holes, sub-aqueous drilling, boring holes for rescue purposes, drift boring
 E21C 19/02
·  Devices for extracting jammed or broken drill bits from holes; Magnetic fishing devices for drills
 E21C 19/04
·  Devices for removing crown bits from boring rods
 E21C 21/00
Flame piercing (dislodging by fire-setting E21C 37/16; for deep-drilling E21B 7/14)
 E21C 23/00
Enlarging drilled holes; Enlarging by chemical action; Counterboring or forming chambers in boreholes to receive explosive charge (for deep-drilling E21B 9/22; «tamping of boreholes C 06 C 13/02»)
 E21C 25/00 - 
E21C 39/00
Cutting; Slitting; Dislodging
 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 (crowns for percussion drilling E21C 13/08)
 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; Picks
 E21C 25/12
·  ·  ·  Picks (general features of picks E21C 35/18)
 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; Picks for same
 E21C 25/30
·  ·  ·  Chain guides
 E21C 25/32
·  ·  ·  ·  specially adapted for curved jibs
 E21C 25/34
·  ·  ·  Chains
 E21C 25/36
·  ·  ·  ·  Couplings for links
 E21C 25/38
·  ·  ·  Picks (general features of picks E21C 35/18)
 E21C 25/40
·  ·  ·  ·  integral with links of chains
 E21C 25/42
·  ·  ·  ·  Attachment of the picks to the links of chains
 E21C 25/44
·  ·  ·  ·  ·  by wedge or taper
 E21C 25/46
·  ·  ·  ·  ·  by resilient means
 E21C 25/48
·  ·  ·  ·  ·  by means of screws or pins
 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, etc. (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, etc. and 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
 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 (supports or guides for drilling machines E21C 11/00; 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)
 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, picks for same E21C 25/10; saws, discs, wheels E21C 25/18; chains, chain guides, picks 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
 E21C 27/46
·  ·  by percussed planing means
 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
 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 per se 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
 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 part
 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
 E21C 35/00
Miscellaneous items relating to machines for slitting or completely freeing the mineral from the seam
 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 substructure
 E21C 35/08
·  Guiding the machine
 E21C 35/10
·  ·  by feelers contacting the working face
 E21C 35/12
·  ·  along a conveyer for the cut mineral
 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
·  General features of picks, e.g. use of special materials (picks for slitting machines E21C 25/12, E21C 25/38)
 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 (removing dust while drilling E21C 7/00)
 E21C 35/24
·  Remote control specially adapted for machines for slitting or completely freeing the mineral (control in general G05)
 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, etc. 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 C06C)
 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 (flame piercing E21C 21/00)
 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 (drilling machines with reciprocating tool E21C 3/00; pneumatic hammers in general B25D)
 E21C 37/26
·  Chisels or other cutting tools not mentioned before
 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 49/00
Methods of mining or quarrying; Open-pit mining; Layouts therefor
 E21C 41/00
Methods of mining with or without movable mining chambers or shields (working shields E21D 19/00); Lay-outs («for peat E21D 19/00»)
 E21C 41/02
·  for brown coal
 E21C 41/04
·  for hard coal
 E21C 41/06
·  for ores
 E21C 41/08
·  for rock salt; for potash salts (obtaining by dissolving out of boreholes E21B 43/28)
 E21C 41/10
·  for oil-bearing deposits
 E21C 41/12
·  for stone, e.g. marble
 E21C 41/14
·  for other specified minerals, e.g. gold, mercury, other heavy metals, sulphur, slate; for clay
 E21C 43/00
Methods for preparing for the gasification of coal underground (methods for generating gas C10B)
 E21C 45/00
Methods of mining placers; Hydraulic monitors or other hydraulic machines for obtaining minerals out of alluvial deposits
 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 E02F)
 E21C 47/04
·  ·  Conveyer bridges used in co-operation with the winning apparatus (overburden conveyer bridges B65G)
 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
 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