E21C25/00	7	Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam (dislodging machines with slitting means E21C27/02, E21C27/10, E21C27/18)	E21C25/00	E21C25/00		134
E21C25/02	8	Machines slitting solely by one or more percussive tools moved through the seam	E21C25/02	E21C25/02		66
E21C25/04	9	Cutting crowns or other tools (percussion drill bits E21B10/36)	E21C25/04	E21C25/04		30
E21C25/06	8	Machines slitting solely by one or more cutting rods or cutting drums which rotate, move through the seam, and may or may not reciprocate	E21C25/06	E21C25/06		464
E21C25/08	9	Mountings for the rods or drums	E21C25/08	E21C25/08		114
E21C25/10	9	Rods; Drums	E21C25/10	E21C25/10		846
E21C25/14	9	with equipment for cleaning the slit (associated with cutter chain machines E21C25/50)	E21C25/14	E21C25/14		45
E21C25/145	10	{Cowls}	E21C25/14	E21C25/14		42
E21C25/16	8	Machines slitting solely by one or more rotating saws, cutting discs, or wheels	E21C25/16	E21C25/16		242
E21C25/18	9	Saws; Discs; Wheels	E21C25/18	E21C25/18		224
E21C25/20	8	Machines slitting solely by one or more reciprocating sawing implements or reciprocating cutter chains; Shaker conveyors with cutting means	E21C25/20	E21C25/20		37
E21C25/22	8	Machines slitting solely by one or more cutter chains moving unidirectionally along jibs	E21C25/22	E21C25/22		34
E21C25/24	9	with flat jibs only	E21C25/24	E21C25/24		54
E21C25/26	9	with curved jibs only	E21C25/26	E21C25/26		14
E21C25/28	9	Chains or chain guides	E21C25/28	E21C25/28		91
E21C25/30	10	Chain guides	E21C25/30	E21C25/30		80
E21C25/32	11	specially adapted for curved jibs	E21C25/32	E21C25/32		8
E21C25/34	10	Chains	E21C25/34	E21C25/34		79
E21C25/36	11	Couplings for links	E21C25/36	E21C25/36		94
E21C25/365	12	{allowing the bending into at least two planes (chains for conveyors which are allowed to bend into at least two planes B65G17/385)}	E21C25/36	E21C25/36		29
E21C25/40	11	having links with integrally formed picks	E21C25/40	E21C25/40		9
E21C25/50	9	with equipment for cleaning the slit (associated with rotary-rod or rotary-drum machines E21C25/14)	E21C25/50	E21C25/50		35
E21C25/52	8	Machines incorporating two or more of the slitting means according to groups E21C25/02, E21C25/06, E21C25/16, E21C25/20 and E21C25/22	E21C25/52	E21C25/52		71
E21C25/54	8	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 E21C27/32; propulsion by haulage cables E21C29/14)	E21C25/54	E21C25/54		87
E21C25/56	8	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 conveyor or by a guide parallel to a conveyor (pressing the conveyor equipped with tools toward the working face E21C35/14)	E21C25/56	E21C25/56		122
E21C25/58	8	Machines slitting by drilling hole on hole	E21C25/58	E21C25/58		198
E21C25/60	8	Slitting by jets of water or other liquid (picks with arrangement of fluid-spraying nozzles E21C35/187; distribution of spraying fluids in rotating cutter-heads E21C35/23)	E21C25/60	E21C25/60		338
E21C25/62	8	Machines for making slits approximately perpendicular to the seams either level with, or above or below the level of, the machine	E21C25/62	E21C25/62		132
E21C25/64	8	Slitting machines guided solely by hand and either carried by hand or mounted on supports (hand-held power-operated tools E21C37/22)	E21C25/64	E21C25/64		128
E21C25/66	8	Machines for making slits with additional arrangements for drilling	E21C25/66	E21C25/66		184
E21C25/68	8	Machines for making slits combined with equipment for removing, e.g. by loading, material won by other means (slitting machines combined with planing means E21C27/18; removing chippings E21C35/20)	E21C25/68	E21C25/68		325
E21C27/00	7	Machines which completely free the mineral from the seam	E21C27/00	E21C27/00		92
E21C27/01	8	specially adapted for removing overhanging coal	E21C27/01	E21C27/01		18
E21C27/02	8	solely by slitting (rods, drums, for same E21C25/10; saws, discs, wheels E21C25/18; chains, chain guides, for same E21C25/28)	E21C27/02	E21C27/02		688
E21C27/04	9	by a single chain guided on a frame with or without auxiliary slitting means	E21C27/04	E21C27/04		62
E21C27/06	10	with a slewing frame	E21C27/06	E21C27/06		58
E21C27/08	9	with additional means for cutting the mineral into blocks	E21C27/08	E21C27/08		31
E21C27/10	8	by both slitting and breaking-down	E21C27/10	E21C27/10		81
E21C27/12	9	breaking-down effected by acting on the vertical face of the mineral, e.g. by percussive tools	E21C27/12	E21C27/12		56
E21C27/122	10	{with breaking-down members having a striking action}	E21C27/12	E21C27/12		71
E21C27/124	10	{with rotatable cutters provided with breaking-down members}	E21C27/12	E21C27/12		163
E21C27/126	10	{with slitting and breaking-down members situated in parallel on an intermediary level}	E21C27/12	E21C27/12		34
E21C27/128	10	{with breaking-down members functioning on the slitting level}	E21C27/12	E21C27/12		67
E21C27/14	9	breaking-down effected by force or pressure applied to side of slit, e.g. by wedges (breaking-down by means inserted in boreholes E21C37/00)	E21C27/14	E21C27/14		32
E21C27/16	10	with means for both slitting and breaking-down	E21C27/16	E21C27/16		39
E21C27/18	8	by both slitting and planing	E21C27/18	E21C27/18		72
E21C27/20	8	Mineral freed by means not involving slitting	E21C27/20	E21C27/20		171
E21C27/22	9	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 E21D9/102)}	E21C27/22	E21C27/22		496
E21C27/24	9	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 E21D9/1026)}	E21C27/24	E21C27/24		628
E21C27/26	9	by closely adjacent cutter chains acting on the full working face	E21C27/26	E21C27/26		91
E21C27/28	9	by percussive drills with breaking-down means, e.g. wedge-shaped tools	E21C27/28	E21C27/28		238
E21C27/30	9	by jaws, buckets or scoops that scoop-out the mineral	E21C27/30	E21C27/30		149
E21C27/32	9	by adjustable or non-adjustable planing means with or without loading arrangements (by percussed planing means E21C27/46)	E21C27/32	E21C27/32		226
E21C27/34	10	Machine propelled along the working face by cable or chain	E21C27/34	E21C27/34		478
E21C27/35	11	Ram-ploughs	E21C27/35	E21C27/35		28
E21C27/36	10	Machine self-propelled along the working face	E21C27/36	E21C27/36		26
E21C27/38	10	Machine stationary while planing in an arc	E21C27/38	E21C27/38		25
E21C27/40	10	Machine and its planing tool making alternative step-wise movements along the working face	E21C27/40	E21C27/40		3
E21C27/42	10	combined with scraper or collector box	E21C27/42	E21C27/42		30
E21C27/44	10	Planing knives (mining picks E21C35/18)	E21C27/44	E21C27/44		80
E21C27/46	9	by percussed planing means	E21C27/46	E21C27/46		126
E21C29/00	7	Propulsion of machines for slitting or completely freeing the mineral from the seam	E21C29/00	E21C29/00		211
E21C29/02	8	by means on the machine exerting a thrust against fixed supports	E21C29/02	E21C29/02		307
E21C29/04	8	by cable or chains	E21C29/04	E21C29/04		68
E21C29/06	9	anchored at one or both ends to the mine working face {(propulsion using fixed racks along which the machine is running E21C29/02)}	E21C29/06	E21C29/06		13
E21C29/08	10	Anchoring arrangements (for anchoring of conveyors only E21F13/00)	E21C29/08	E21C29/08		64
E21C29/10	10	Cable or chain co-operating with a winch or the like on the machine	E21C29/10	E21C29/10		368
E21C29/12	10	Machines propelled by thrust or pull against a part alternately anchored to and released from a cable or chain	E21C29/12	E21C29/12		15
E21C29/14	9	by haulage cable or chain pulling the machine along the working face	E21C29/14	E21C29/14		148
E21C29/145	10	{Means for tensioning the haulage chains or cables}	E21C29/14	E21C29/14		49
E21C29/16	10	Winches or other means for pulling cable or chain (winches in general B66D)	E21C29/16	E21C29/16		146
E21C29/18	10	Coupling and uncoupling machine to cable or chain	E21C29/18	E21C29/18		22
E21C29/185	11	{with coupling or uncoupling of the machine at will}	E21C29/18	E21C29/18		12
E21C29/20	9	with safety devices operating in the event of breakage of the cable or chain	E21C29/20	E21C29/20		56
E21C29/22	8	by wheels, endless tracks or the like {(propulsion using fixed racks along which the machine is running E21C29/02)}	E21C29/22	E21C29/22		576
E21C29/24	9	Trucks carrying the machine while working	E21C29/24	E21C29/24		43
E21C29/26	10	with means for adjustably positioning the machine on the truck	E21C29/26	E21C29/26		19
E21C29/28	11	adjusting the height of the whole machine	E21C29/28	E21C29/28		8
E21C31/00	7	Driving means incorporated in machines for slitting or completely freeing the mineral from the seam	E21C31/00	E21C31/00		507
E21C31/02	8	for cutting or breaking-down devices	E21C31/02	E21C31/02		850
E21C31/025	9	{by another slitting or extracting member}	E21C31/02	E21C31/02		16
E21C31/04	9	imparting both a rotary and reciprocating motion	E21C31/04	E21C31/04		63
E21C31/06	9	actuated by an endless cable or chain	E21C31/06	E21C31/06		37
E21C31/08	8	for adjusting parts of the machines	E21C31/08	E21C31/08		280
E21C31/10	8	for slewing parts of the machines	E21C31/10	E21C31/10		210
E21C31/12	8	Component parts	E21C31/12	E21C31/12		127
E21C33/00	7	Trucks or other devices for transporting machines for slitting or completely freeing the mineral from the seam	E21C33/00	E21C33/00		41
E21C33/02	8	with equipment for loading or unloading the machine on to or from the truck	E21C33/02	E21C33/02		40
E21C33/025	9	{the unloaded machine remaining connected to the transport vehicle}	E21C33/02	E21C33/02		1
E21C35/00	7	Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00	E21C35/00	E21C35/00		1416
E21C35/02	8	Locking equipment for slewable parts	E21C35/02	E21C35/02		32
E21C35/04	8	Safety devices (operating in the event of breakage of a haulage cable or chain E21C29/20)	E21C35/04	E21C35/04		460
E21C35/043	9	{Protection against overload during transfer of machines for slitting or completely freeing the mineral from the seam}	E21C35/04	E21C35/04		101
E21C35/046	9	{Protection of cables or pipes for supplying power}	E21C35/04	E21C35/04		113
E21C35/06	8	Equipment for positioning the whole machine in relation to its sub-structure	E21C35/06	E21C35/06		231
E21C35/08	8	Guiding the machine	E21C35/08	E21C35/08		168
E21C35/10	9	by feelers contacting the working face	E21C35/10	E21C35/10		18
E21C35/12	9	along a conveyor for the cut material	E21C35/12	E21C35/12		523
E21C35/125	10	{Means for inclining the conveyor}	E21C35/12	E21C35/12		117
E21C35/14	10	Equipment for pressing the conveyor towards the working face	E21C35/14	E21C35/14		163
E21C35/16	9	by making use of the timbering, filling, or other supports	E21C35/16	E21C35/16		85
E21C35/18	8	Mining picks; Holders therefor (planing knives E21C27/44)	E21C35/18	E21C35/18		810
E21C35/183	9	with inserts or layers of wear-resisting material {(drill bits with wear-resistant parts E21B10/46)}	E21C35/183	E21C35/183		773
E21C35/1831	10	{Fixing methods or devices}	E21C35/183	E21C35/183		290
E21C35/1833	10	{Multiple inserts}	E21C35/183	E21C35/183		84
E21C35/1835	10	{Chemical composition or specific material}	E21C35/183	E21C35/183		178
E21C35/1837	10	{characterised by the shape}	E21C35/183	E21C35/183		388
E21C35/184	9	{Reversible picks, i.e. having two working ends, one operating, the other in reserve}	E21C35/18	E21C35/18		35
E21C35/186	9	{using a locking piston actuated hydraulically, e.g. by spraying-fluid pressure}	E21C35/18	E21C35/18		5
E21C35/187	9	with arrangement of fluid-spraying nozzles (supply of fluid to the nozzles E21C35/22)	E21C35/187	E21C35/187		282
E21C35/188	9	{characterised by adaptations to use an extraction tool}	E21C35/18	E21C35/18		259
E21C35/19	9	Means for fixing picks or holders	E21C35/19	E21C35/19		742
E21C35/191	10	{for fixing holders}	E21C35/19	E21C35/19		277
E21C35/193	10	using bolts as main fixing elements	E21C35/193	E21C35/193		167
E21C35/1933	11	{the picks having a cylindrical shank}	E21C35/193	E21C35/193		104
E21C35/1936	11	{the picks having a square- or rectangular-section shank}	E21C35/193	E21C35/193		216
E21C35/197	10	using sleeves, rings or the like, as main fixing elements	E21C35/197	E21C35/197		475
E21C35/20	8	General features of equipment for removal of chippings, e.g. for loading on conveyor	E21C35/20	E21C35/20		1170
E21C35/22	8	Equipment for preventing the formation of, or for removal of, dust (picks with arrangement of fluid-spraying nozzles E21C35/187; {removing dust while drilling E21B21/011})	E21C35/22	E21C35/22		764
E21C35/223	9	{Equipment associated with mining machines for sucking dust-laden air from the cutting area, with or without cleaning of the air}	E21C35/22	E21C35/22		297
E21C35/226	9	{Control valves for the spraying liquid used in dust suppression systems}	E21C35/22	E21C35/22		72
E21C35/23	9	Distribution of spraying-fluids in rotating cutter-heads	E21C35/23	E21C35/23		288
E21C35/24	8	Remote control specially adapted for machines for slitting or completely freeing the mineral (control in general G05)	E21C35/24	E21C35/24		823
E21C35/282	8	{Autonomous machines; Autonomous operations}	E21C35/00	E21C35/282		354
E21C35/302	8	{Measuring, signaling or indicating specially adapted for machines for slitting or completely freeing the mineral (measuring or indicating on tunneling machines E21D9/003)}	E21C35/00	E21C35/302		489
E21C37/00	7	Other methods or devices for dislodging with or without loading (breaking-down by means inserted in slits E21C27/14)	E21C37/00	E21C37/00		494
E21C37/005	8	{by projectiles}	E21C37/00	E21C37/00		25
E21C37/02	8	by wedges	E21C37/02	E21C37/02		185
E21C37/04	8	by devices with parts pressed mechanically against the wall of a borehole {or a slit}	E21C37/04	E21C37/04		222
E21C37/06	8	by making use of hydraulic or pneumatic pressure in a borehole	E21C37/06	E21C37/06		165
E21C37/08	9	Devices with pistons, plungers, or the like, pressed locally against the wall of the borehole {(E21C37/10 takes precedence)}	E21C37/08	E21C37/08		193
E21C37/10	9	Devices with expanding elastic casings	E21C37/10	E21C37/10		130
E21C37/12	9	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 E21C25/60; blasting by explosives F42D)	E21C37/12	E21C37/12		629
E21C37/14	9	by compressed air; by gas blast; by gasifying liquids	E21C37/14	E21C37/14		435
E21C37/16	8	by fire-setting or by similar methods based on a heat effect (drilling by use of heat E21B7/14)	E21C37/16	E21C37/16		220
E21C37/18	8	by electricity	E21C37/18	E21C37/18		206
E21C37/20	8	by ultrasonic waves	E21C37/20	E21C37/20		25
E21C37/22	8	Hand tools or hand-held power-operated tools specially adapted for dislodging minerals (slitting machines guided solely by hand E21C25/64)	E21C37/22	E21C37/22		111
E21C37/24	9	Pick hammers (pneumatic hammers in general B25D; percussion drilling E21B1/00)	E21C37/24	E21C37/24		34
E21C37/26	8	Chisels or other cutting tools not mentioned before	E21C37/26	E21C37/26		30
E21C39/00	7	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	E21C39/00	E21C39/00		467
E21C41/00	7	Methods of underground or surface mining (E21C45/00 takes precedence); Layouts therefor (for peat E21C49/00)	E21C41/00	E21C41/00		231
E21C41/16	8	Methods of underground mining (winning machines therefor E21C25/00&#160;-&#160;E21C39/00); Layouts therefor	E21C41/16	E21C41/16		966
E21C41/18	9	for brown or hard coal	E21C41/18	E21C41/18		2897
E21C41/20	9	for rock salt or potash salt	E21C41/20	E21C41/20		184
E21C41/22	9	for ores, e.g. mining placers	E21C41/22	E21C41/22		1272
E21C41/24	9	for oil-bearing deposits	E21C41/24	E21C41/24		406
E21C41/26	8	Methods of surface mining (machines for obtaining, or the removal of, materials in open-pit mines E21C47/00); Layouts therefor	E21C41/26	E21C41/26		459
E21C41/28	9	for brown or hard coal	E21C41/28	E21C41/28		180
E21C41/30	9	for ores, e.g. mining placers	E21C41/30	E21C41/30		148
E21C41/31	9	{for oil-bearing deposits}	E21C41/26	E21C41/31		63
E21C41/32	8	Reclamation of surface-mined areas (machines or methods for treating or working soil for agricultural purposes A01B77/00, A01B79/00; machines for back-filling E02F5/22)	E21C41/32	E21C41/32		270
E21C45/00	7	Methods of hydraulic mining; Hydraulic monitors (E21C25/60 takes precedence)	E21C45/00	E21C45/00		202
E21C45/02	8	Means for generating pulsating fluid jets	E21C45/02	E21C45/02		6
E21C45/04	9	by use of highly pressurised liquid	E21C45/04	E21C45/04		55
E21C45/06	9	by use of compressed gases	E21C45/06	E21C45/06		5
E21C45/08	8	Automatic or remote control of hydraulic monitors	E21C45/08	E21C45/08		15
E21C47/00	7	Machines for obtaining or the removal of materials in open-pit mines (obtaining peat E21C49/00)	E21C47/00	E21C47/00		429
E21C47/02	8	for coal, brown coal, or the like (dredgers or soil-shifting machines in general E02F)	E21C47/02	E21C47/02		355
E21C47/04	9	Conveyor bridges used in co-operation with the winning apparatus	E21C47/04	E21C47/04		60
E21C47/06	9	Cableway conveyors used in co-operation with the winning apparatus (underground hauling E21F13/00)	E21C47/06	E21C47/06		10
E21C47/08	9	Devices for cutting-out partings, e.g. layers of sand between seams of coal	E21C47/08	E21C47/08		19
E21C47/10	8	for quarrying stone, sand, gravel, or clay	E21C47/10	E21C47/10		298
E21C49/00	7	Obtaining peat; Machines therefor (treating peat C10F)	E21C49/00	E21C49/00		319
E21C49/02	8	by excavating	E21C49/02	E21C49/02		92
E21C49/04	8	by digging in the form of peat sods	E21C49/04	E21C49/04		70
E21C50/00	7	Obtaining minerals from underwater, not otherwise provided for (suction dredgers or component parts thereof E02F3/88; equipment for conveying or separating excavated material E02F7/00; dippers G01N1/12)	E21C50/00	E21C50/00		1035
E21C50/02	8	dependent on the ship movements (vessels or floating structures adapted for special purposes B63B35/00)	E21C50/02	E21C50/02		174
E21C51/00	7	Apparatus for, or methods of, winning materials from extraterrestrial sources (cosmonautics B64G)	E21C51/00	E21C51/00		103
E21C2100/00	7	Modeling, simulating or designing mining operations	CPCONLY	E21C2100/00		40
E21C2200/00	7	Mining robots	CPCONLY	E21C2200/00		11
