Cooperative Patent Classification

Indent Level

Version: 2016.11
CPC
COOPERATIVE PATENT CLASSIFICATION
E21D
SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS (soil-conditioning or soil-stabilising materials C09K 17/00; drilling or cutting machines for mining or quarrying E21C; safety devices, transport, rescue, ventilation or drainage E21F) [2016-01]
WARNING

Shafts [2013-01]
E21D 1/00
Sinking shafts [2013-01]
E21D 1/02
.
by hand [2013-01]
E21D 1/03
.
mechanically, {e.g. by loading shovels or loading buckets, scraping devices, conveying screws }(E21D 1/08 takes precedence) [2013-01]
E21D 1/04
. .
with grabs {(boring grabs E21D 1/04, E21B 27/00; grab buckets for digging in general E02F 3/47)} [2013-01]
E21D 1/06
. .
with shaft-boring cutters (drilling machines E21B, E21C) [2013-01]
E21D 1/08
.
while moving the lining downwards {(lowering the lining into a ready shaft E21D 5/01; sheet piles E02D 5/02)} [2013-01]
E21D 1/10
.
Preparation of the ground {(for galleries or tunnels E21D 9/001; improving or preserving foundation soil or rock E02D 3/00)} [2013-01]
E21D 1/105
. .
{by water level modification} [2013-01]
E21D 1/12
. .
by freezing {(freezing of foundation soil E02D 3/115)} [2013-01]
E21D 1/14
. . .
Freezing apparatus [2013-01]
E21D 1/16
. .
by petrification (grouting anchoring-bolts E21D 20/02; {consolidating foundation soil by placing solidifying or pore-filling substances in the soil E02D 3/12}) [2013-01]
E21D 3/00
Raising shafts, i.e. working upwards from the bottom [2013-01]
E21D 5/00
Lining shafts; Linings therefor (E21D 11/00 takes precedence; {sinking with simultaneous lowering of the lining E21D 1/08}) [2013-01]
E21D 5/01
.
using prefabricated lining lowered into a hole filled with liquid or viscous mass [2013-01]
E21D 5/012
.
Use of fluid-tight or anti-friction material on outside of, or between, lining layers [2013-01]
E21D 5/016
.
Bearer curbs [2013-01]
E21D 5/02
.
with wood (E21D 5/01, E21D 5/012, E21D 5/016 take precedence) [2013-01]
E21D 5/04
.
with brick, concrete, stone, or similar building materials (E21D 5/01, E21D 5/012, E21D 5/016 take precedence) [2013-01]
E21D 5/06
.
with iron or steel (E21D 5/01, E21D 5/012, E21D 5/016 take precedence) [2013-01]
E21D 5/08
. .
in the form of profiled parts [2013-01]
E21D 5/10
. .
in the form of tubbing {or of rings composed of profile elements} [2013-01]
E21D 5/11
.
with combinations of different materials, e.g. wood, metal, concrete (E21D 5/01, E21D 5/012, E21D 5/016 take precedence) [2013-01]
E21D 5/12
.
Accessories for making shaft linings, e.g. suspended cradles, shutterings [2013-01]
E21D 7/00
Shaft equipment, e.g. timbering within the shaft {(lifts in hoistways or mines B66B 15/00 - B66B 19/00)} [2016-05]
E21D 7/005
.
{Determination of shaft lining deformation} [2013-01]
E21D 7/02
.
Arrangement of guides for cages in shafts; Connection of guides for cages to shaft walls (guideways or guides for elevators B66B 7/02) [2013-01]
E21D 8/00
Shafts not provided for in groups E21D 1/00 - E21D 7/00 [2016-05]
Tunnels; Galleries; Large underground chambers; Linings therefor (galleries protecting against falling rocks or avalanches E01F 7/04; pressure galleries, galleries specially adapted to house pressure water conduits E02B 9/06; tunnels or galleries specially adapted to house conduits in general E02D 29/10; sewers E03F) [2013-01]
E21D 9/00
Tunnels or galleries, with or without linings; Methods or apparatus for making thereof (E02D 29/045, E02D 29/063 take precedence; linings per se E21D 11/00); Layout of tunnels or galleries [2013-01]
E21D 9/001
.
{Improving soil or rock, e.g. by freezing; Injections (for sinking shafts E21D 1/10; injection of liquids for binding dust E21F 5/18; improving or preserving foundation soil or rock E02D 3/00; borehole closures, i.e. packers, for use during the injection process E21B 33/12)} [2013-01]
E21D 9/002
. .
{Injection methods characterised by the chemical composition used} [2013-01]
E21D 9/003
.
{Arrangement of measuring or indicating devices for use during driving of tunnels, e.g. for guiding machines} [2013-01]
E21D 9/004
. .
{using light beams for direction or position control} [2013-01]
E21D 9/005
.
{by forcing prefabricated elements through the ground, e.g. by pushing lining from an access pit (driving shields E21D 9/06)} [2013-01]
E21D 9/006
.
{by making use of blasting methods (explosive compositions C06B; blasting per se F42)} [2013-01]
E21D 9/008
.
{Driving transverse tunnels starting from existing tunnels} [2016-01]
E21D 9/01
.
Methods or apparatus for enlarging or restoring the cross-section of tunnels, e.g. by restoring the floor to its original level [2016-01]
E21D 9/02
.
Driving inclined tunnels or galleries [2013-01]
E21D 9/03
.
{Driving non-circular tunnels} [2016-01]
E21D 9/04
.
Driving tunnels or galleries through loose materials; Apparatus therefor not otherwise provided for {(E21D 9/005, E21D 9/06 take precedence; soil improvement E21D 9/001; provisional protective covers E21D 19/04)} [2013-01]
E21D 9/06
.
Making by using a driving shield, {i.e. advanced by pushing means bearing against the already placed lining (pushing prefabricated elements through the ground from an access pit E21D 9/005)} [2013-01]
E21D 9/0607
. .
{the shield being provided with devices for lining the tunnel, e.g. shuttering (E21D 9/0873, E21D 9/0879 take precedence; tail sealing means used as end shuttering E21D 9/0635)} [2016-01]
E21D 9/0609
. . .
{with means for applying a continuous liner, e.g. sheets of plastics, between the main concrete lining and the rock} [2016-01]
E21D 9/0621
. .
{Shield advancing devices} [2013-01]
E21D 9/0635
. .
{Tail sealing means, e.g. used as end shuttering} [2013-01]
E21D 9/0642
. .
{the shield having means for additional processing at the front end} [2016-01]
E21D 9/065
. . .
{with devices for provisionally supporting the front face} [2016-01]
E21D 9/0657
. . .
{structurally associated with rock crushers} [2016-01]
E21D 9/0664
. . .
{with means for applying a coating layer to the front face, e.g. by spraying} [2016-01]
E21D 9/0671
. . .
{with means for consolidating the rock in front of the shield by injection of consolidating substances through boreholes} [2016-01]
E21D 9/0678
. . .
{Adding additives, e.g. chemical compositions, to the slurry or the cuttings} [2016-01]
NOTE

  • When classifying in this group, bentonite shall not be classified
E21D 9/0685
. . . .
{Foaming agents} [2016-01]
E21D 9/0692
. .
{Cutter drive shields} [2013-01]
E21D 9/08
. .
with additional boring or cutting means {other than the conventional cutting edge of the shield} [2013-01]
E21D 9/087
. . .
with a rotary drilling-head cutting simultaneously the whole cross-section, i.e. full-face machines [2016-01]
E21D 9/0873
. . . .
{the shield being provided with devices for lining the tunnel, e.g. shuttering} [2016-01]
E21D 9/0874
. . .
{with rotary drilling heads having variable diameter} [2016-01]
E21D 9/0875
. . .
{with a movable support arm carrying cutting tools for attacking the front face, e.g. a bucket} [2016-01]
E21D 9/0879
. . . .
{the shield being provided with devices for lining the tunnel, e.g. shuttering} [2016-01]
E21D 9/093
. .
Control of the driving shield {, e.g. of the hydraulic advancing cylinders (arrangement of measuring or indicating devices for use during driving of tunnels E21D 9/003)} [2016-01]
E21D 9/10
.
Making by using boring or cutting machines (E21D 9/08 takes precedence; mining picks E21C 35/18) [2013-01]
E21D 9/1006
. .
{with rotary cutting tools (for cutting simultaneously the whole cross-section E21D 9/11; drill bits E21B 10/00)} [2013-01]
E21D 9/1013
. . .
{on a tool-carrier supported by a movable boom} [2013-01]
E21D 9/102
. . . .
{by a longitudinally extending boom being pivotable about a vertical and a transverse axis} [2013-01]
E21D 9/1026
. . . . .
{the tool-carrier being rotated about a transverse axis} [2013-01]
E21D 9/1033
. . . .
{by a transversely extending boom being pivotable about a longitudinal axis} [2013-01]
E21D 9/104
. . .
{Cutting tool fixtures (devices with percussive tools E21D 9/106)} [2013-01]
E21D 9/1046
. . . .
{Vibrating} [2013-01]
E21D 9/1053
. .
{for making a slit along the perimeter of the tunnel profile, the remaining core being removed subsequently, e.g. by blasting} [2013-01]
E21D 9/106
. .
{with percussive tools, e.g. pick-hammers} [2013-01]
E21D 9/1066
. .
{with fluid jets (projecting hot gases E21D 9/1073; drilling by liquid or gas jets E21B 7/18; slitting by liquid jets E21C 25/60)} [2013-01]
E21D 9/1073
. .
{applying thermal energy, e.g. by projecting flames or hot gases, by laser beams (flame drilling E21B 7/14)} [2013-01]
E21D 9/108
. .
{Remote control specially adapted for machines for driving tunnels or galleries (for machines for slitting or completely freeing the mineral E21C 35/24)} [2013-01]
E21D 9/1086
. .
{Drives or transmissions specially adapted therefor} [2013-01]
E21D 9/1093
. .
{Devices for supporting, advancing or orientating the machine or the tool-carrier (measuring devices for guiding machines E21D 9/003; anchoring in the borehole E21B 4/18)} [2013-01]
E21D 9/11
. .
with a rotary drilling-head cutting simultaneously the whole cross-section, i.e. full-face machines [2013-01]
E21D 9/111
. . .
{by means of heads or tool-carrying sectors implementing an oscillating rotary motion} [2013-01]
E21D 9/112
. . .
{by means of one single rotary head or of concentric rotary heads (E21D 9/111 takes precedence)} [2013-01]
E21D 9/113
. . . .
{having a central part for making a pilot tunnel and a follow-up part for enlarging the pilot tunnel (E21D 9/115 takes precedence; similar apparatus for enlarging drilled boreholes E21B 7/28)} [2013-01]
E21D 9/115
. . . .
{with cutting tools mounted pivotably or slidable on the head} [2013-01]
E21D 9/116
. . .
{by means of non-concentric rotary heads (E21D 9/111 takes precedence)} [2013-01]
E21D 9/117
. . . .
{mounted for orientating or sideways shifting relative to the frame} [2013-01]
E21D 9/118
. . . .
{with independently driven central head} [2013-01]
E21D 9/12
.
Devices for removing or hauling away excavated material or spoil; Working or loading platforms (underground transport E21F 13/00) [2013-01]
E21D 9/122
. .
{Working or loading platforms (underground transport E21F 13/00)} [2013-01]
E21D 9/124
. .
{Helical conveying means therefor (E21D 9/13 takes precedence)} [2013-01]
E21D 9/126
. .
{Loading devices or installations (loading platforms E21D 9/122; soil-shifting machines E02F 3/00)} [2013-01]
E21D 9/128
. . .
{Loader-conveyors with gathering arms} [2016-05]
E21D 9/13
. .
using hydraulic or pneumatic conveying means [2013-01]
E21D 9/14
.
Layout of tunnels or galleries; Constructional features of tunnels or galleries, not otherwise provided for, e.g. portals, day-light attenuation at tunnel openings [2013-01]
E21D 11/00
Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling (E21D 15/00 - E21D 23/00 take precedence; specially for shafts E21D 5/00; {driving shields in combination with means for lining the tunnel E21D 9/06 }; lining pressure water galleries, linings therefor E02B 9/06) [2016-05]
E21D 11/003
.
{Linings or provisions thereon, specially adapted for traffic tunnels, e.g. with built-in cleaning devices (E21D 11/38 takes precedence)} [2013-01]
E21D 11/006
.
{Lining anchored in the rock (setting anchoring-bolts E21D 20/00; anchoring-bolts E21D 21/00)} [2013-01]
E21D 11/02
.
Lining predominantly with wood [2013-01]
E21D 11/03
. .
using timber- setting machines [2013-01]
E21D 11/04
.
Lining with building materials (E21D 11/02, E21D 11/14 take precedence; {compositions of mortars, concrete or like building materials C04B; placing filling-up materials in underground workings E21F 15/00}) [2013-01]
E21D 11/05
. .
using compressible insertions [2013-01]
E21D 11/06
. .
with bricks [2013-01]
E21D 11/07
. . .
using brick- laying machines {(brick-laying machines per se E04G 21/22)} [2013-01]
E21D 11/08
. .
with preformed concrete slabs {(backfilling the space between the slabs and the rock E21D 11/105)} [2013-01]
E21D 11/083
. . .
{Methods or devices for joining adjacent concrete segments} [2013-01]
E21D 11/086
. . .
{Methods of making concrete lining segments} [2016-01]
E21D 11/10
. .
with concrete cast in situ; Shuttering {also lost shutterings, e.g. made of blocks, of metal plates} or other equipment adapted therefor [2013-01]
E21D 11/102
. . .
{Removable shuttering; Bearing or supporting devices therefor} [2013-01]
E21D 11/105
. . .
{Transport or application of concrete specially adapted for the lining of tunnels or galleries (in building E04F 21/08, E04G 21/02); Backfilling the space between main building element and the surrounding rock, e.g. with concrete} [2013-01]
E21D 11/107
. . .
{Reinforcing elements therefor; Holders for the reinforcing elements} [2013-01]
E21D 11/12
. .
Temporary supports for use during building {(removable shutterings E21D 11/102)}; Accessories {(provisional protective covers E21D 19/04)} [2013-01]
E21D 11/14
.
Lining predominantly with metal {(backfilling the space between the lining elements and the rock E21D 11/105)} [2013-01]
E21D 11/15
. .
Plate linings; Laggings, i.e. linings designed for holding back formation material or for transmitting the load to main supporting members (insulation E21D 11/38) [2013-01]
E21D 11/152
. . .
{Laggings made of grids or nettings} [2013-01]
E21D 11/155
. . .
{Laggings made of strips, slats, slabs or sheet piles (longitudinal struts for mine arches E21D 11/28)} [2013-01]
E21D 11/157
. . .
{Laggings making use of fluid cushions, e.g. the fluid containing a hardenable material (chocks made of flexible containers E21D 15/483)} [2013-01]
E21D 11/18
. .
Arch members; {Network made of arch members (E21D 11/36 takes precedence); Ring elements; Polygon elements; Polygon elements inside arches (caps for arches E21D 17/00)} [2013-01]
E21D 11/183
. . .
{Supporting means for arch members, not provided for in E21D 11/22} [2013-01]
E21D 11/186
. . .
{Pre-stressing or dismantling devices therefor} [2013-01]
E21D 11/20
. . .
Special cross- sections, e.g. corrugated {(for props E21D 15/502; for caps E21D 17/01)} [2013-01]
E21D 11/22
. . .
Clamps or other yieldable means for interconnecting adjacent arch members either rigidly, or allowing arch member parts to slide when subjected to excessive pressure [2013-01]
E21D 11/24
. . .
Knuckle joints or links between arch members [2013-01]
E21D 11/26
. . .
Shoes for connecting arch members to longitudinal struts [2013-01]
E21D 11/28
. .
Longitudinal struts, {i.e. longitudinal connections between adjoining arches} [2013-01]
E21D 11/30
. .
Bases for lower arch members (for props E21D 15/54) [2013-01]
E21D 11/34
. .
Joints between vertical props and horizontal top bars (end caps forming part of the props E21D 15/54; {retaining plates on caps for engaging the tops of pit-props E21D 17/10}) [2013-01]
E21D 11/36
. .
Linings or supports specially shaped for tunnels or galleries of irregular cross-section [2013-01]
E21D 11/362
. . .
{for loading areas (lining shafts E21D 5/00)} [2013-01]
E21D 11/365
. . .
{for intersecting galleries} [2013-01]
E21D 11/367
. . .
{for junction with the longwall coal face (walking supports therefor E21D 23/0091)} [2013-01]
E21D 11/38
.
Waterproofing (in general E02D 31/00); Heat insulating; Soundproofing; Electric insulating (for building constructions in general E04B 1/62) [2013-01]
E21D 11/381
. .
{Setting apparatus or devices} [2013-01]
E21D 11/383
. .
{by applying waterproof flexible sheets; Means for fixing the sheets to the tunnel or cavity wall} [2013-01]
E21D 11/385
. .
{Sealing means positioned between adjacent lining members (for joints in foundation structures E02D 29/16; for sewers E03F 3/04; for building structures in general E04B 1/68)} [2013-01]
E21D 11/386
. . .
{inflatable sealing means} [2016-01]
E21D 11/388
. . .
{having longitudinal cavities communicating with the exterior on the outer side of the lining elements} [2016-01]
E21D 11/40
.
Devices or apparatus specially adapted for handling or placing units of linings {or supporting units} for tunnels or galleries {(combined with tunnelling shields E21D 9/06)} [2013-01]
E21D 11/403
. .
{combined with the head machine} [2013-01]
E21D 11/406
. .
{Placing endless lining elements, e.g. from reels (in combination with a tunneling shield E21D 9/0609)} [2016-01]
E21D 13/00
Large underground chambers; Methods or apparatus for making them (lining E21D 11/00) [2013-01]
Working-face supports [2013-01]
E21D 15/00
Props (in the building art E04G 25/00); Chocks, {e.g. made of flexible containers filled with backfilling material} [2013-01]
E21D 15/002
.
{Auxiliary devices in which the prop type is not essential (setting or withdrawing props or chocks E21D 15/58, E21D 15/60)} [2013-01]
E21D 15/005
.
{characterised by the material} [2013-01]
E21D 15/007
. .
{spark-reducing} [2013-01]
E21D 15/02
.
Non-telescopic props [2013-01]
E21D 15/04
. .
with wooden prop parts joined by double conical connectors [2013-01]
E21D 15/06
. .
with parts joined by a lock, with or without slight axial adjustability [2013-01]
E21D 15/08
. . .
with toggle joint connection [2013-01]
E21D 15/10
. . .
with dog-clutch or pin-and-hole connection [2013-01]
E21D 15/12
. . .
with locking devices located near head or foot {(E21D 15/08 and E21D 15/10 take precedence)} [2013-01]
E21D 15/14
.
Telescopic props (general means for fixing telescopic parts together {F16B 7/10}) [2013-01]
E21D 15/15
. .
Means counteracting entry of dirt; Built-in cleaning devices [2013-01]
E21D 15/155
. . .
{Built-in cleaning devices} [2013-01]
E21D 15/16
. .
with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure [2013-01]
E21D 15/18
. . .
with one part resting on a supporting medium, e.g. rubber, sand, bitumen, lead, located in the other part, with or without expulsion or displacement of the medium upon excessive pressure {(clamping pressure between telescopic prop elements by means of granular material E21D 15/303)} [2013-01]
E21D 15/20
. . .
with pawl, pin, cross-piece, or the like engaging with ratchet teeth, notches, holes, or the like, spaced apart at intervals [2013-01]
E21D 15/22
. . .
with member, pin, cross- piece, or the like, ruptured, sheared through, or permanently deformed upon excessive pressure [2013-01]
E21D 15/24
. . .
with axial screw-and-nut, rack-and-worm, or like mechanism [2013-01]
E21D 15/26
. . . .
with screw, worm, or the like, not self-locking but normally prevented from rotation by friction members which slip upon excessive pressure [2013-01]
E21D 15/28
. .
with parts held relatively to each other by friction or gripping [2013-01]
E21D 15/285
. . .
{by means of wedges or wedge combinations (details of wedges E21D 15/43)} [2013-01]
E21D 15/30
. . .
by means expanded or contracted by pressure applied through the medium of a fluid or quasi- fluid, e.g. rubber {(setting props E21D 15/588, E21D 15/589)} [2013-01]
E21D 15/303
. . . .
{by means of granular material (supporting by means of granular material E21D 15/18)} [2013-01]
E21D 15/306
. . . .
{by means of a liquid} [2013-01]
E21D 15/32
. . .
by a deformable collar {or clamping means applied symmetrically inside a locking ring} [2013-01]
E21D 15/325
. . . .
{by a clamping ring} [2013-01]
E21D 15/34
. . .
by axially- moving balls, rollers, or the like [2013-01]
E21D 15/36
. . .
by a tiltable collar surrounding one or both parts [2013-01]
E21D 15/38
. . .
with longitudinally-divided upper or lower prop parts, e.g. interfitting laminations [2013-01]
E21D 15/40
. . .
Collar or other support gripped to one or both parts by toggle-action, cam, or other member pivoted or similarly mounted [2013-01]
E21D 15/42
. . .
with special parts to influence the friction [2013-01]
E21D 15/43
. . .
Details of wedges (friction linings or pads E21D 15/42) [2013-01]
E21D 15/435
. . . .
{hydraulic} [2013-01]
E21D 15/44
. .
Hydraulic, pneumatic, or hydraulic-pneumatic props {(see also E21D 15/51)} [2013-01]
E21D 15/445
. . .
{comprising a fluid cushion} [2013-01]
E21D 15/45
. . .
having closed fluid system, e.g. with built-in pumps or accumulators [2013-01]
E21D 15/46
. .
with load-measuring devices; with alarm devices [2013-01]
E21D 15/465
. . .
{with essential hydraulic or pneumatic details} [2013-01]
E21D 15/48
.
Chocks or the like [2013-01]
E21D 15/483
. .
{made of flexible containers, e.g. inflatable, with or without reinforcement, e.g. filled with water, backfilling material or the like (laggings making use of fluid cushions E21D 11/157)} [2013-01]
E21D 15/486
. .
{with essential hydraulic or pneumatic details} [2013-01]
E21D 15/50
.
Component parts or details of props (E21D 15/43, E21D 15/58, E21D 15/60 take precedence) [2013-01]
E21D 15/502
. .
Prop bodies characterised by their shape, e.g. of specified cross-section [2013-01]
E21D 15/51
. .
specially adapted to hydraulic, pneumatic, or hydraulic-pneumatic props, e.g. arrangements of relief valves {(not used, see subgroups and E21D 15/44)} [2013-01]
E21D 15/512
. . .
{Arrangement of valves (external control of roof support installations E21D 23/12, E21D 23/26)} [2013-01]
E21D 15/515
. . .
{Particular fluids not covered by any chemical subdivision} [2013-01]
E21D 15/517
. . .
{Extension elements} [2013-01]
E21D 15/52
. .
Extensible units located above or below standard props (for allowing step-by-step movement of cap E21D 23/06; setting props or chocks E21D 15/58) [2015-07]
E21D 15/523
. . .
{with hydraulic or pneumatic control} [2013-01]
E21D 15/526
. . .
{for step-by-step extension of the prop} [2013-01]
E21D 15/54
. .
Details of the ends of props (for permitting step-by-step movement E21D 23/06) [2013-01]
E21D 15/545
. . .
{hydraulic or pneumatic} [2013-01]
E21D 15/55
. . .
of prop heads {or feet} [2013-01]
E21D 15/56
. .
Details of locks of telescopic props [2013-01]
E21D 15/563
. . .
{by which a series of similarly shaped props can obtain an almost equal load-capacity (setting props or chocks E21D 15/584, E21D 15/589)} [2013-01]
E21D 15/566
. . .
{comprising a fluid cushion} [2013-01]
E21D 15/58
.
Devices for setting props or chocks [2013-01]
E21D 15/581
. .
{in which the props are pre- loaded (extensible elements at strut extremities E21D 15/52)} [2013-01]
E21D 15/5813
. . .
{by means of power accumulators to be pre-charged by rock pressure (by means of hydraulically operated devices E21D 15/587)} [2016-01]
E21D 15/5817
. . .
{in which the lock is also activated} [2016-01]
E21D 15/584
. .
{in which a series of similarly shaped props obtain an almost equal load capacity by removable devices (idem for extensible props E21D 15/563)} [2013-01]
E21D 15/585
. .
{by means of hydraulically operated devices for mechanical props, or hydraulic props in which the hydraulic part is not important (hydraulic props in which the hydraulic part is important E21D 15/44)} [2013-01]
E21D 15/586
. . .
{the props being pre-loaded} [2013-01]
E21D 15/587
. . . .
{by means of power accumulators to be pre-charged by rock pressure} [2013-01]
E21D 15/588
. . . .
{the lock also being activated} [2013-01]
E21D 15/589
. . .
{in which a series of similarly shaped props are given almost equal load capacity by removable devices} [2013-01]
E21D 15/60
.
Devices for withdrawing props or chocks [2013-01]
E21D 15/603
. .
{by means of hydraulic devices} [2013-01]
E21D 15/606
. .
{the props being moved systematically (mine roof supports for step-by-step movement E21D 23/00)} [2013-01]
E21D 17/00
Caps for supporting mine roofs [2013-01]
E21D 17/003
.
{with essential hydraulic elements} [2013-01]
E21D 17/006
.
{characterised by the material} [2013-01]
E21D 17/01
.
characterised by the shape of the cap, e.g. of specified cross-section [2013-01]
E21D 17/02
.
Cantilever extension or similar protecting devices [2013-01]
E21D 17/0206
. .
{Hydraulically operated extension devices} [2013-01]
E21D 17/0213
. .
{Assembling devices for pivoting caps upwardly} [2013-01]
E21D 17/03
. .
Brackets for roof-supporting bars [2013-01]
E21D 17/04
. .
for use in longwall working [2013-01]
E21D 17/06
. .
for use in drifting galleries [2013-01]
E21D 17/08
. .
Cap joints for obtaining a coal-face free of pit-props [2013-01]
E21D 17/082
. . .
of sliding type [2013-01]
E21D 17/086
. . .
or articulated type [2013-01]
E21D 17/10
.
Details of mine caps for engaging the tops of pit-props, with or without retaining-plates; Retaining-plates [2013-01]
E21D 19/00
Provisional protective covers for working space (E21D 9/06, E21D 23/00 take precedence) [2013-01]
E21D 19/02
.
for use in longwall working [2013-01]
E21D 19/04
.
for use in drifting galleries [2013-01]
E21D 20/00
Setting anchoring-bolts (anchoring bolts for shafts, tunnels or galleries E21D 21/00; means for anchoring structural elements or bulkheads specially adapted to foundation engineering E02D 5/74; dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose F16B 13/00) [2013-01]
E21D 20/003
.
{Machines for drilling anchor holes and setting anchor bolts} [2013-01]
E21D 20/006
. .
{having magazines for storing and feeding anchoring-bolts (combined feeding from racks and connecting of drill rods or the like E21B 19/20)} [2013-01]
E21D 20/02
.
with provisions for grouting [2013-01]
E21D 20/021
. .
{Grouting with inorganic components, e.g. cement} [2013-01]
E21D 20/023
. . .
{Cartridges; Grouting charges} [2013-01]
E21D 20/025
. .
{Grouting with organic components, e.g. resin} [2013-01]
E21D 20/026
. . .
{Cartridges; Grouting charges} [2013-01]
E21D 20/028
. .
{Devices or accesories for injecting a grouting liquid in a bore-hole (E21D 20/003 takes precedence; improving soil or rock by injections E21D 9/001)} [2013-01]
E21D 21/00
Anchoring-bolts for roof, floor {in galleries or longwall working}, or shaft-lining protection ({ground anchors E02D 5/80; anchorings for building constructions E04B 1/41, E21D 21/00 }; dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose F16B 13/00; {bolts with visible load G01L 1/00}) [2013-01]
E21D 21/0006
.
{characterised by the bolt material} [2013-01]
E21D 21/0013
.
{Protection against corrosion} [2013-01]
E21D 21/002
.
{using explosives charges} [2013-01]
E21D 21/0026
.
{characterised by constructional features of the bolts} [2013-01]
E21D 21/0033
. .
{having a jacket or outer tube} [2013-01]
E21D 21/004
. .
{Bolts held in the borehole by friction all along their length, without additional fixing means} [2013-01]
E21D 21/0046
. .
{formed by a plurality of elements arranged longitudinally} [2013-01]
E21D 21/0053
. .
{Anchoring-bolts in the form of lost drilling rods} [2016-01]
E21D 21/006
. .
{Anchoring-bolts made of cables or wires} [2016-01]
E21D 21/0066
. .
{Anchoring-bolts formed by a bundle of radially arranged rigid elements} [2016-01]
E21D 21/0073
. .
{Anchoring-bolts having an inflatable sleeve, e.g. hollow sleeve expanded by a fluid} [2016-01]
E21D 21/008
.
{Anchoring or tensioning means} [2013-01]
E21D 21/0086
.
{Bearing plates} [2013-01]
E21D 21/0093
.
{Accessories} [2013-01]
E21D 21/02
.
having means for indicating tension (screwed connections specially modified for indicating tensile load F16B 31/02) [2013-01]
E21D 23/00
Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor ({transport of mine roof support units E21F 13/008; } shifting of mine conveyors at the working face E21F 13/08) [2016-05]
E21D 23/0004
.
{along the working face} [2013-01]
E21D 23/0008
. .
{comprising a pair of joined struts} [2013-01]
E21D 23/0013
. .
{Frame type supports} [2013-01]
E21D 23/0017
. .
{Pile type supports} [2013-01]
E21D 23/0021
. . .
{comprising two walking elements} [2013-01]
E21D 23/0026
. . .
{comprising three walking elements} [2013-01]
E21D 23/003
. . .
{consisting of a rigid pile} [2013-01]
E21D 23/0034
. .
{comprising a goaf shield articulated to a base member} [2013-01]
E21D 23/0039
. . .
{and supported by a strut or by a row of struts parallel to the working face} [2013-01]
E21D 23/0043
. . .
{and supported by two or more rows of struts parallel to the working face} [2013-01]
E21D 23/0047
.
{without essential shifting devices} [2013-01]
E21D 23/0052
.
{with advancing shifting devices connected therewith} [2013-01]
E21D 23/0056
.
{with individual advancing shifting devices} [2013-01]
E21D 23/006
.
{provided with essential hydraulic devices} [2013-01]
E21D 23/0065
. .
{driven, or automatically, e.g. electrically-hydraulically controlled} [2013-01]
E21D 23/0069
. .
{without essential advancing shifting devices} [2013-01]
E21D 23/0073
. .
{with advancing shifting devices connected therewith} [2013-01]
E21D 23/0078
. .
{with individual shifting devices} [2013-01]
E21D 23/0082
.
{specially adapted for vertical or steep gradient seams} [2013-01]
E21D 23/0086
.
{in galleries} [2013-01]
E21D 23/0091
. .
{at the junction with the working face} [2013-01]
E21D 23/0095
. .
{Temporary supports at the driving front} [2013-01]
E21D 23/03
.
having protective means, e.g. shields, for preventing or impeding entry of loose material into the working space or support [2013-01]
E21D 23/04
.
Structural features of the supporting construction, e.g. linking members between adjacent frames or sets of props; Means for counteracting lateral sliding on inclined floor (E21D 23/14 takes precedence) [2013-01]
E21D 23/0409
. .
{Aligning or guiding means for the supports or for the constitutive parts of the supports} [2013-01]
E21D 23/0418
. .
{Positioning devices and stabilizing means for the props} [2013-01]
E21D 23/0427
. .
{Shield operating devices; Hinges therefor} [2013-01]
E21D 23/0436
. .
{Means for inclining the base member of the support} [2013-01]
E21D 23/0445
. .
{Extensions of the base member supporting the conveyor} [2016-05]
E21D 23/0454
. .
{Trailing plates; Coal face or goaf side sprags (specially adapted for the placing of filling-up materials E21D 23/0481)} [2013-01]
E21D 23/0463
. .
{Hanging or shifting means for tubes, electric feeding cables or the like} [2013-01]
E21D 23/0472
. .
{Supports specially adapted for people walking or transporting material} [2013-01]
E21D 23/0481
. .
{Supports specially adapted for use in combination with the placing of filling-up materials (placing filling-up materials in underground workings per se E21F 15/00)} [2013-01]
WARNING

E21D 23/049
. .
{Connecting devices between the head or foot of a prop and the cap or base of the roof support} [2013-01]
E21D 23/06
. .
Special mine caps or special tops of pit-props for permitting step-by-step movement [2013-01]
E21D 23/063
. . .
{Retractable cantilever extensions therefor} [2013-01]
E21D 23/066
. . .
{Pivoted cantilever extensions therefor} [2013-01]
E21D 23/08
.
Advancing mechanisms (E21D 23/16 takes precedence) [2013-01]
E21D 23/081
. .
{forming parts of the roof supports} [2013-01]
E21D 23/082
. . .
{acting solely on the elements of the supports} [2013-01]
E21D 23/083
. . .
{acting on a firm abutment adapted thereto} [2013-01]
E21D 23/085
. . .
{acting on a conveyor or a guide for the mining machine} [2016-05]
E21D 23/086
. . . .
{Details of fixing devices therefor} [2013-01]
E21D 23/087
. . .
{acting directly on the walls of the seam} [2013-01]
E21D 23/088
. . . .
{by means of wheels, rollers, caterpillars, belts or worm screws} [2013-01]
E21D 23/10
. .
with advancing devices separate from the supporting construction [2013-01]
E21D 23/12
.
Control, e.g. using remote control (E21D 23/16 takes precedence) [2013-01]
E21D 23/14
. .
Effecting automatic sequential movement of supports, e.g. one behind the other {(advancing of mining machines toward the working face E21C 29/02; advancing of conveyors toward the working face E21D 23/085)} [2016-05]
E21D 23/142
. . .
{Measuring the advance of support units with respect to external points of reference} [2016-01]
E21D 23/144
. . .
{Measuring the advance of support units with respect to internal points of reference, e.g. with respect to neighboring support units or extension of a cylinder} [2016-01]
E21D 23/146
. . .
{Transmission of signals and commands by cable} [2016-01]
E21D 23/148
. . .
{Wireless transmission of signals or commands} [2016-01]
E21D 23/16
.
Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices [2013-01]
E21D 23/18
. .
of advancing mechanisms [2013-01]
E21D 23/20
. . .
for sequential movement, e.g. one behind the other [2013-01]
E21D 23/22
. . .
incorporated in mine caps [2013-01]
E21D 23/24
. . .
the advancing mechanisms being separate from the supporting construction [2013-01]
E21D 23/26
. .
Hydraulic or pneumatic control [2013-01]