WebCPC CPC COOPERATIVE PATENT CLASSIFICATION

E21C　MINING OR QUARRYING

E21C 1/00 Rotary-drilling machines (rotary-drilling machines in general B23B; rotary earth drilling E21B 3/00; driving of shafts, galleries or tunnelsE21D){not used, see subgroup and E21B 3/00}

E21C 1/10 ・with a built-in feeding device (feeding devices E21C 5/00)

E21C 3/00 Drilling machines with reciprocating tool that is intermittently turned when out of contact with the working face(portable percussion tools in generalB25D)

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 {(not used, see subgroups and B25D)}

E21C 3/16 ・・by electromagnets

E21C 3/18 ・・directly by a piston of an internal-combustion engine

E21C 3/24 ・・directly by air, steam, or gas pressure

E21C 3/26 ・・・working with pulses

E21C 5/00 Devices for feeding tool to working face (feeding devices for metal-boring machines B23B){not used, see subgroups and E21B 19/08}

E21C 5/08 ・Means for driving feed mechanism {not used, see subgroups and E21B 19/08}

E21C 5/10 ・・Separate motor, e.g. compressed-air motor or cylinder

E21C 7/00 Dust eliminating or dust removing while drilling ({see alsoE21B 21/00}; equipment for preventing the formation of dust by slitting or dislodging machinesE21C 35/22;{by foamE21B 21/14};exhausting dust from minesE21F 5/20)

E21C 7/04 ・using exhaust air from the drill motor for blowing-off the dust

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 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 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

E21C 25/14 ・・with equipment for cleaning the slit (associated with cutter chain machines E21C 25/50)

E21C 25/145 ・・・{Cowls}

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

E21C 25/30 ・・・Chain guides

E21C 25/32 ・・・・specially adapted for curved jibs

E21C 25/34 ・・・Chains

E21C 25/36 ・・・・Couplings for links

E21C 25/365 ・・・・・{allowing the bending into at least two planes (chains for conveyers which are allowed to bend into at least two planes B65G 17/385)}

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 towards 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 arrangements of fluid-spraying nozzles E21C 35/187; distribution of spraying fluids in rotating cutter-heads E21C 35/23)

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, 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 27/122 ・・・{with breaking-down members having a striking action}

E21C 27/124 ・・・{with rotatable cutters provided with breaking-down members}

E21C 27/126 ・・・{with slitting and breaking-down members situated in parallel on an intermediary level}

E21C 27/128 ・・・{with breaking-down members functioning on the slitting level}

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, {i.e. the rotary axis of the tool carrier being substantially perpendicular to the working face, e.g. MARIETTA-type (similar machines for tunneling E21D 9/102)}

E21C 27/24 ・・by milling means acting on the full working face, {i.e. the rotary axis of the tool carrier being substantially parallel to the working face (similar machines for tunneling E21D 9/1026)}

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

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 {(propulsion using fixed racks along which the machine is running E21C 29/02)}

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 29/145 ・・・{Means for tensioning the haulage chains or cables}

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 29/185 ・・・・{with coupling or uncoupling of the machine at will}

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 {(propulsion using fixed racks along which the machine is running E21C 29/02)}

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 31/025 ・・{by another slitting or extracting member}

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

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 33/025 ・・{the unloaded machine remaining connected to the transport vehicle}

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 35/043 ・・{Protection against overload during transfer of machines for slitting or completely freeing the mineral from the seam}

E21C 35/046 ・・{Protection of cables or pipes for supplying power}

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 35/125 ・・・{Means for inclining the conveyer}

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; {pick-like bits for milling stone like materials B28D 1/186})

E21C 35/183 ・・with inserts or layers of wear-resistant material {(drill bits with wear-resistant parts E21B 10/46)}

E21C 35/187 ・・with arrangement of fluid-spraying nozzles (supply of fluid to the nozzles E21C 35/22)

E21C 35/19 ・・Means for fixing picks or holders

E21C 35/193 ・・・using bolts as main fixing elements

E21C 35/1933 ・・・・{the picks having a cylindrical shank}

E21C 35/1936 ・・・・{the picks having a square- or rectangular-section shank}

E21C 35/197 ・・・using sleeves, rings or the like, as main fixing elements

E21C 35/20 ・General features of equipment for removal of chippings e.g. for loading on coveyer

E21C 35/22 ・Equipment for preventing the formation of, or for removal of, dust (removing dust while drilling E21C 7/00; picks with arrangement of fluid-spraying nozzles E21C 35/187)

E21C 35/223 ・・{Equipment associated with mining machines for sucking dust-laden air from the cutting area, with or without cleaning of the air}

E21C 35/23 ・・Distribution of spraying-fluids in rotating cutter-heads

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 37/005 ・{by projectiles}

E21C 37/02 ・by wedges

E21C 37/04 ・by devices with parts pressed mechanically against the wall of a borehole {or a slit}

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 takes precedence)}

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

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 Methods of underground or surface mining (E21C 45/00 takes precedence); Lay-outs therefor (for peat E21C 49/00)

E21C 41/04 ・for hard coal

E21C 41/10 ・for oil-bearing deposits

E21C 41/14 ・for other specified minerals, e.g. gold, mercury, other heavy metals, sulfur, slate; for clay

E21C 41/16 ・Methods of underground mining (winning machines therefor E21C 25/00 to E21C 39/00); Layouts therefor

E21C 41/18 ・・for brown or hard coal

E21C 41/20 ・・for rock salt or potash salt

E21C 41/22 ・・for ores, e.g. mining placers

E21C 41/24 ・・for oil-bearing deposits

E21C 41/26 ・Methods of surface mining (machines for obtaining, or the removal of, materials in open-pit mines E21C 47/00); Layouts therefor

E21C 41/28 ・・for brown or hard coal

E21C 41/30 ・・for ores, e.g. mining placers

E21C 41/31 ・・{for oil-bearing deposits}

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)

E21C 43/00 Methods for preparing for the gasification of coal underground (methods for generating gas C10B)

E21C 45/00 Methods of hydraulic mining; Hydraulic monitors (E21C 25/60 takes precedence)

E21C 45/02 ・Means for generating pulsating fluid jets

E21C 45/04 ・・by use of highly pressurised liquid

E21C 45/06 ・・by use of compressed gases

E21C 45/08 ・Automatic or remote control of hydraulic monitors

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)

E21C 47/04 ・・Conveyer bridges used in co-operation with the winning apparatus

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

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)

E21C 50/02 ・dependent on the ship movements (vessels or floating structures adapted for special purposes B63B 35/00)

E21C 51/00 Apparatus for, or methods of, winning materials from extraterrestrial sources (cosmonautics B64G)

E21C 2035/00 Miscellaneous items relating to machines for slitting or completely freeing the mineral from the seam

E21C 2035/18 ・Mining picks; Holders therefor (planing knives E21C 27/44; {pick-like bits for milling stone like materials B28D 1/186})

E21C 2035/1803 ・・Inserts or layers of wear-resistant material

E21C 2035/1806 ・・・Fixing methods or devices

E21C 2035/1809 ・・・Multiple inserts

E21C 2035/1813 ・・・Chemical composition or specific material

E21C 2035/1816 ・・・characterised by the shape

E21C 2035/182 ・・Reversible picks, i.e. having two working ends, one operating, the other in reserve

E21C 2035/1823 ・・using a locking piston actuated hydraulically, e.g. by spraying-fluid pressure

E21C 2035/1826 ・・characterised by adaptations to use an extraction tool

E21C 2035/19 ・・Means for fixing picks or holders

E21C 2035/191 ・・・for fixing holders

E21C 2035/22 ・Equipment for preventing the formation of, or for removal of, dust (removing dust while drilling E21C 7/00; picks with arrangement of fluid-spraying nozzles E21C 35/187)

E21C 2035/226 ・・Control valves for the spraying liquid used in dust suppression systems