IPC 6 English version E21C !A-E21C 27/46

IPC ⁶ English version

E21C-E21C02746

E21C 29/00 - E21C 51/00

SECTION E– FIXED CONSTRUCTIONS

E 21

EARTH DRILLING; MINING

E 21 C

MINING OR QUARRYING

Notes

(1)

This subclass covers methods or apparatus specific to mining or quarrying. [3]

(2)

This subclass does not cover, even though they may be disclosed only for mining or quarrying, drill bits, bore reamers, core taking devices, drilling pipes or rods, handling, racking or connecting arrangements for drilling pipes or rods, counterboring or enlarging drilled holes, flame drilling, or other drilling apparatus, which are covered by subclass E 21 B. [3]

Drilling machines

Rotary-drilling machines (rotary-drilling machines in general B 23 B; rotary earth drilling E 21 B 3/00; driving of shafts, galleries or tunnels E 21 D)

with a continuous rotation of the tool, with or without variable speed gearing

with slipping or elastic transmission

with a to-and-fro rotation of the tool

with an intermittent unidirectional rotation of the tool

with a built-in feeding device (feeding devices E 21 C 5/00)

with percussive action superimposed on a continuously-rotating tool always in contact with the working face

Drilling machines with reciprocating tool that is intermittently turned when out of contact with the working face (portable percussion tools in general B 25 D)

Machines in which the tool is connected to an impulse member

Hammer drilling machines in which the tool is hit by an impulse member

Means for driving the impulse member

by a rotating mechanism

formed as centrifugal hammers

with spring-mounted reciprocating masses

with elastic joining of the drive to the push-rod by double buffer springs

by electromagnets

directly by a piston of an internal-combustion engine

directly by liquid pressure

working with pulses

directly by air, steam, or gas pressure

working with pulses

Intermittent turning of tool obtained by rifled-bar or ratchet device

driven by separate motor

with arrangements for automatic stopping when the tool is lifted from the working face or suffers excessive bore resistance (pick hammers E 21 C 37/24)

Arrangements for locking the drill to the hammer or to the machine

Details of drilling apparatus

Devices for feeding tool to working face (feeding devices for metal-boring machines B 23 B)

Screw-and-nut feed mechanism

Cam, rack, or like feed mechanism

Flexible drawing means, e.g. cables

Means for driving feed mechanism

Separate motor, e.g. compressed-air motor or cylinder (E 21 C 5/11 takes precedence)

combined with supporting means, e.g. feed legs

Weight or spring drive

Automatic feed by jump or recoil of the drilling machine

with arrangements for automatically interrupting the feed when the tool suffers excessive bore resistance

Dust eliminating or dust removing while drilling (equipment for preventing the formation of dust by slitting or dislodging machines E 21 C 35/22; exhausting dust from mines E 21 F 5/20)

by exhausting dust-loaded air

using exhaust air from the drill motor for blowing-off the dust

by foam

by liquids

Liquid flushing installations

Preventing exhaust air from the drill motor from blowing-off towards the working face

Supporting, guiding or centralising devices for boring rods (handling, racking, connecting E 21 B 19/00)

11/

Supports or guides for drilling machines; Columns to which the machine is clamped (feed legs E 21 C 5/11; slitting machines mounted on supports E 21 C 25/64; guiding, slitting, or dislodging machines E 21 C 35/08)

11/

Drill wagons (trucks for slitting or dislodging machines E 21 C 29/24)

Cutting; Slitting; Dislodging

25/

Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam (dislodging machines with slitting means E 21 C 27/02, E 21 C 27/10, E 21 C 27/18)

25/

Machines slitting solely by one or more percussive tools moved through the seam

25/

Cutting crowns or other tools (percussion drill bits E 21 B 10/36)

25/

Machines slitting solely by one or more cutting rods or cutting drums which rotate, move through the seam, and may or may not reciprocate

25/

Mountings for the rods or drums

25/

Rods; Drums [6]

25/

(transferred to E 21 C 35/18)

25/

with equipment for cleaning the slit (associated with cutter chain machines E 21 C 25/50)

25/

Machines slitting solely by one or more rotating saws, cutting discs, or wheels

25/

Saws; Discs; Wheels

25/

Machines slitting solely by one or more reciprocating sawing implements or reciprocating cutter chains; Shaker conveyers with cutting means

25/

Machines slitting solely by one or more cutter chains moving unidirectionally along jibs

25/

with flat jibs only

25/

with curved jibs only

25/

Chains or chain guides [6]

25/

Chain guides

25/

specially adapted for curved jibs

25/

Chains

25/

Couplings for links

25/

(transferred to E 21 C 35/18)

25/

having links with integrally formed picks

25/

(transferred to E 21 C 35/18)

25/

with equipment for cleaning the slit (associated with rotary-rod or rotary-drum machines E 21 C 25/14)

25/

Machines incorporating two or more of the slitting means according to groups E 21 C 25/02, E 21 C 25/06, E 21 C 25/16, E 21 C 25/20 and E 21 C 25/22

25/

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 E 21 C 27/32; propulsion by haulage cables E 21 C 29/14)

25/

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 E 21 C 35/14)

25/

Machines slitting by drilling hole on hole

25/

Slitting by jets of water or other liquid (picks with arrangement of fluid-spraying nozzles E 21 C 35/187; distribution of spraying fluids in rotating cutter-heads E 21 C 35/23) [6]

25/

Machines for making slits approximately perpendicular to the seams either level with, or above or below the level of, the machine

25/

Slitting machines guided solely by hand and either carried by hand or mounted on supports (supports or guides for drilling machines E 21 C 11/00; hand-held power-operated tools E 21 C 37/22)

25/

Machines for making slits with additional arrangements for drilling

25/

Machines for making slits combined with equipment for removing, e.g. by loading, material won by other means (slitting machines combined with planing means E 21 C 27/18; removing chippings E 21 C 35/20)

27/

Machines which completely free the mineral from the seam

27/

specially adapted for removing overhanging coal

27/

solely by slitting (rods, drums, for same E 21 C 25/10; saws, discs, wheels E 21 C 25/18; chains, chain guides, for same E 21 C 25/28)

27/

by a single chain guided on a frame with or without auxiliary slitting means

27/

with a slewing frame

27/

with additional means for cutting the mineral into blocks

27/

by both slitting and breaking-down

27/

breaking-down effected by acting on the vertical face of the mineral, e.g. by percussive tools

27/

breaking-down effected by force or pressure applied to side of slit, e.g. by wedges (breaking-down by means inserted in boreholes E 21 C 37/00)

27/

with means for both slitting and breaking-down

27/

by both slitting and planing

27/

Mineral freed by means not involving slitting

27/

by rotary drills with breaking-down means, e.g. wedge-shaped drills

27/

by milling means acting on the full working face

27/

by closely adjacent cutter chains acting on the full working face

27/

by percussive drills with breaking-down means, e.g. wedge-shaped tools

27/

by jaws, buckets, or scoops that scoop-out the mineral

27/

by adjustable or non-adjustable planing means with or without loading arrangements (by percussed planing means E 21 C 27/46)

27/

Machine propelled along the working face by cable or chain

27/

Ram-ploughs

27/

Machine self-propelled along the working face

27/

Machine stationary while planing in an arc

27/

Machine and its planing tool making alternative step-wise movements along the working face

27/

combined with scraper or collector box

27/

Planing knives (mining picks E 21 C 35/18)

27/

by percussed planing means

E21C 29/00 - E21C 51/00