|  | 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 Fulltext... Hierarchy... Expanded...E21B; for sinking shafts Fulltext... Hierarchy... Expanded...E21D; for tunnelling Fulltext... Hierarchy... Expanded...E01G; for working stone Fulltext... Hierarchy... Expanded...B28D; for working metal Fulltext... Hierarchy... Expanded...B23B; for woodworking Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...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 (Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...E21C 35/22; exhausting dust from mines Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...E21C 5/11; slitting machines mounted on supports Fulltext... Hierarchy... Expanded...E21C 25/64; guiding, slitting, or dislodging machines Fulltext... Hierarchy... Expanded...E21C 35/08)

|  | E21C 11/02 |
· | Drill wagons (trucks for slitting or dislodging machines Fulltext... Hierarchy... Expanded...E21C 29/24)

|  | E21C 13/00 |
Drill cutting blades, crown bits, or roller-cutter bits (for deep-drilling Fulltext... Hierarchy... Expanded...E21B 9/00); Wear-resisting inserts for blades or bits (uniting inserts to blades or bits Fulltext... Hierarchy... Expanded...B23, e.g. Fulltext... Hierarchy... Expanded...B23K, Fulltext... Hierarchy... Expanded...B23P 3/26; materials Fulltext... Hierarchy... Expanded...C21D, Fulltext... Hierarchy... Expanded...C22C)

|  | E21C 13/01 |
· | Wear-resisting inserts (Fulltext... Hierarchy... Expanded...E21C 13/02, Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...E21C 13/06-E21C 13/12 take precedence; for deep-drilling Fulltext... Hierarchy... Expanded...E21B 9/36)

|  | E21C 13/02 |
· | for rotary drilling; for core boring (dislodging machines with rotary drills Fulltext... Hierarchy... Expanded...E21C 27/22; augers for making post-holes for foundation purposes Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...E21B 17/00, Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...E21C 37/16; for deep-drilling Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...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 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 (crowns for percussion drilling Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...E21C 35/18)

|  | 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; 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 Fulltext... Hierarchy... Expanded...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 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, etc. (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, 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 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

|  | 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 Fulltext... Hierarchy... Expanded...E21C 11/00; 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)

|  | 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 Fulltext... Hierarchy... Expanded...E21C 25/10; saws, discs, wheels Fulltext... Hierarchy... Expanded...E21C 25/18; chains, chain guides, picks 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

|  | 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 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 per se 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

|  | 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 Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...E21C 25/12, Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...E21C 7/00)

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

|  | 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, 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 Fulltext... Hierarchy... Expanded...E21C 25/60; blasting by explosives Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...E21C 25/64)

|  | E21C 37/24 |
· · | Pick hammers (drilling machines with reciprocating tool Fulltext... Hierarchy... Expanded...E21C 3/00; pneumatic hammers in general Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...E21D 19/00); Lay-outs («for peat Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...E21C 49/00)

|  | E21C 47/02 |
· | for coal, brown coal, or the like (dredgers Fulltext... Hierarchy... Expanded...E02F)

|  | E21C 47/04 |
· · | Conveyer bridges used in co-operation with the winning apparatus (overburden conveyer bridges Fulltext... Hierarchy... Expanded...B65G)

|  | 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

|  | 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