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Outline
Indent Level
Color Curly Brackets (indicating CPC extensions to IPC) References Date Revised

CPC
COOPERATIVE PATENT CLASSIFICATION
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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)
WARNING
-
The following IPC groups are not used in the CPC scheme. Subject matter covered by these groups is classified in the following CPC groups:

E21D9/01 covered by E21D 9/00
E21D9/087 covered by E21D 9/00
E21D9/093 covered by E21D 9/00
E21D13/02 covered by E21D 13/00
E21D13/04 covered by E21D 13/00
E21D15/582 covered by E21D 15/58
E21D15/59 covered by E21D 15/44, E21D 15/58
E21D17/022 covered by E21D 17/02
E21D17/05 covered by E21D 17/0206, E21D 17/04
E21D17/054 covered by E21D 17/04
E21D19/06 covered by E21D 19/02, E21D 19/04


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Guide Heading:
Shafts
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Sinking shafts
E21D 1/02
.
by hand
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E21D 1/03
.
mechanically,
{
e.g. by loading shovels or loading buckets, scraping devices, conveying screws
}
(E21D 1/08 takes precedence)
E21D 1/04
. .
with grabs
{
(boring grabs E21D 1/04, E21B 27/00; grab buckets for digging in general E02F 3/47)
}
E21D 1/06
. .
with shaft-boring cutters (drilling machines E21B, E21C)
E21D 1/08
.
while moving the lining downwards
{
(lowering the lining into a ready shaft E21D 5/01; sheet piles E02D 5/02)
}
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E21D 1/10
.
Preparation of the ground
{
(for galleries or tunnels E21D 9/001; improving or preserving foundation soil or rock E02D 3/00)
}
E21D 1/105
. .
{
by water level modification
}
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E21D 1/12
. .
by freezing
{
(freezing of foundation soil E02D 3/115)
}
E21D 1/14
. . .
Freezing apparatus
E21D 1/16
. .
by petrification (grouting anchoring-boltsE21D 20/02;
{
consolidating foundation soil by placing solidifying or pore-filling substances in the soilE02D 3/12
}
)
Raising shafts, i.e. working upwards from the bottom
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Lining shafts; Linings therefor (E21D 11/00 takes precedence;
{
sinking with simultaneous lowering of the lining E21D 1/08
}
)
E21D 5/01
.
using prefabricated lining lowered into a hole filled with liquid or viscous mass
E21D 5/012
.
Use of fluid-tight or anti-friction material on outside of, or between, lining layers
E21D 5/016
.
Bearer curbs
E21D 5/02
.
with wood (E21D 5/01, E21D 5/012, E21D 5/016 take precedence)
E21D 5/04
.
with brick, concrete, stone, or similar building materials (E21D 5/01, E21D 5/012, E21D 5/016 take precedence)
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E21D 5/06
.
with iron or steel (E21D 5/01, E21D 5/012, E21D 5/016 take precedence)
E21D 5/08
. .
in the form of profiled parts
E21D 5/10
. .
in the form of tubbing
{
or of rings composed of profile elements
}
E21D 5/11
.
with combinations of different materials, e.g. wood, metal, concrete (E21D 5/01, E21D 5/012, E21D 5/016 take precedence)
E21D 5/12
.
Accessories for making shaft linings, e.g. suspended cradles, shutterings
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Shaft equipment, e.g. timbering within the shaft
{
(lifts in hoistways or mines B66B 15/00 to B66B 19/00)
}
E21D 7/005
.
{
Determination of shaft lining deformation
}
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)
Shafts not provided for in groups E21D 1/00 to E21D 7/00
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Guide Heading:
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)
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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
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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)
}
E21D 9/002
. .
{
Injection methods characterised by the chemical composition used
}
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E21D 9/003
.
{
Arrangement of measuring or indicating devices for use during driving of tunnels, e.g. for guiding machines
}
E21D 9/004
. .
{
using light beams for direction or position control
}
E21D 9/005
.
{
by forcing prefabricated elements through the ground, e.g. by pushing lining from an access pit (driving shields E21D 9/06)
}
E21D 9/006
.
{
by making use of blasting methods (explosive compositions C06B; blasting per se F42)
}
E21D 9/007
.
{
Methods or devices for restoring the cross-section of tunnels, e.g. by equalising the floor
}
E21D 2009/008
.
{
Driving transverse tunnels starting from existing tunnels
}
E21D 9/02
.
Driving inclined tunnels or galleries
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)
}
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.
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)
}
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E21D 9/0607
. .
{
the shield being provided with devices for lining the tunnel, e.g. shuttering (E21D 9/082, E21D 9/087 take precedence; tail sealing means used as end shuttering E21D 9/0635)
}
E21D 2009/0614
. . .
{
with means for applying a continuous liner, e.g. sheets of plastics, between the main concrete lining and the rock
}
E21D 9/0621
. .
{
Shield advancing devices
}
E21D 9/0628
. .
{
Control of the shields, e.g. of the hydraulic advancing cylinders (arrangement of measuring or indicating devices for use during driving of tunnels E21D 9/003)
}
E21D 9/0635
. .
{
Tail sealing means, e.g. used as end shuttering
}
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E21D 2009/0642
. .
{
the shield having means for additional processing at the front end
}
E21D 2009/065
. . .
{
with devices for provisionally supporting the front face
}
E21D 2009/0657
. . .
{
structurally associated with rock crushers
}
E21D 2009/0664
. . .
{
with means for applying a coating layer to the front face, e.g. by spraying
}
E21D 2009/0671
. . .
{
with means for consolidating the rock in front of the shield by injection of consolidating substances through boreholes
}
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E21D 2009/0678
. . .
{
Adding additives, e.g. chemical compositions, to the slurry or the cuttings (bentonite shall not be coded)
}
E21D 2009/0685
. . . .
{
Foaming agents
}
E21D 9/0692
. .
{
Cutter drive shields
}
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E21D 9/08
. .
with additional boring or cutting means
{
other than the conventional cutting edge of the shield
}
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E21D 9/081
. . .
{
with a rotary drilling head cutting simultaneously the whole front face
}
E21D 9/082
. . . .
{
the shield being provided with devices for lining the tunnel, e.g. shuttering
}
E21D 2009/084
. . . .
{
with rotary drilling heads having variable diameter
}
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E21D 9/085
. . .
{
with a movable support arm carrying cutting tools for attacking the front face, e.g. a bucket
}
E21D 9/087
. . . .
{
the shield being provided with devices for lining the tunnel, e.g. shuttering
}
E21D 2009/088
. . .
{
for driving non-circular tunnels
}
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.
Making by using boring or cutting machines (E21D 9/08 takes precedence; mining picks E21C 35/18)
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E21D 9/1006
. .
{
with rotary cutting tools (for cutting simultaneously the whole cross-section E21D 9/11; drill bits E21B 10/00)
}
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E21D 9/1013
. . .
{
on a tool-carrier supported by a movable boom
}
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E21D 9/102
. . . .
{
by a longitudinally extending boom being pivotable about a vertical and a transverse axis
}
E21D 9/1026
. . . . .
{
the tool-carrier being rotated about a transverse axis
}
E21D 9/1033
. . . .
{
by a transversely extending boom being pivotable about a longitudinal axis
}
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E21D 9/104
. . .
{
Cutting tool fixtures (devices with percussive tools E21D 9/106)
}
E21D 9/1046
. . . .
{
Vibrating
}
E21D 9/1053
. .
{
for making a slit along the perimeter of the tunnel profile, the remaining core being removed subsequently, e.g. by blasting
}
E21D 9/106
. .
{
with percussive tools, e.g. pick-hammers
}
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)
}
E21D 9/1073
. .
{
applying thermal energy, e.g. by projecting flames or hot gases, by laser beams (flame drilling E21B 7/14)
}
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)
}
E21D 9/1086
. .
{
Drives or transmissions specially adapted therefor
}
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)
}
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E21D 9/11
. .
with a rotary drilling-head cutting simultaneously the whole cross-section, i.e. full-face machines
E21D 9/111
. . .
{
by means of heads or tool-carrying sectors implementing an oscillating rotary motion
}
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E21D 9/112
. . .
{
by means of one single rotary head or of concentric rotary heads (E21D 9/111 takes precedence)
}
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)
}
E21D 9/115
. . . .
{
with cutting tools mounted pivotably or slidable on the head
}
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E21D 9/116
. . .
{
by means of non-concentric rotary heads (E21D 9/111 takes precedence)
}
E21D 9/117
. . . .
{
mounted for orientating or sideways shifting relative to the frame
}
E21D 9/118
. . . .
{
with independently driven central head
}
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E21D 9/12
.
Devices for removing or hauling away excavated material or spoil; Working or loading platforms (underground transport E21F 13/00)
E21D 9/122
. .
{
Working or loading platforms (underground transport E21F 13/00)
}
E21D 9/124
. .
{
Helical conveying means therefor (E21D 9/13 takes precedence)
}
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E21D 9/126
. .
{
Loading devices or installations (loading platforms E21D 9/122; soil-shifting machines E02F 3/00)
}
E21D 9/128
. . .
{
Loader-conveyers with gathering arms
}
E21D 9/13
. .
using hydraulic or pneumatic conveying means
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
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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 to 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)
E21D 11/003
.
{
Linings or provisions thereon, specially adapted for traffic tunnels, e.g. with built-in cleaning devices (E21D 11/38 takes precedence)
}
E21D 11/006
.
{
Lining anchored in the rock (setting anchoring-bolts E21D 20/00; anchoring-bolts E21D 21/00)
}
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E21D 11/02
.
Lining predominantly with wood
E21D 11/03
. .
using timber- setting machines
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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
}
)
E21D 11/05
. .
using compressible insertions
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E21D 11/06
. .
with bricks
E21D 11/07
. . .
using brick- laying machines
{
(brick-laying machines per se E04G 21/22)
}
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E21D 11/08
. .
with preformed concrete slabs
{
(backfilling the space between the slabs and the rock E21D 11/105)
}
E21D 11/083
. . .
{
Methods or devices for joining adjacent concrete segments
}
E21D 2011/086
. . .
{
Making of concrete lining segments
}
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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
E21D 11/102
. . .
{
Removable shuttering; Bearing or supporting devices therefor
}
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
}
E21D 11/107
. . .
{
Reinforcing elements therefor; Holders for the reinforcing elements
}
E21D 11/12
. .
Temporary supports for use during building
{
removable shutterings E21D 11/102
}
; Accessories
{
(provisional protective covers E21D 19/04)
}
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E21D 11/14
.
Lining predominantly with metal
{
(backfilling the space between the lining elements and the rock E21D 11/105)
}
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E21D 11/15
. .
Plate linings; Laggings, i.e. linings designed for holding back formation material or for transmitting the load to main supporting members (insulationE21D 11/38)
E21D 11/152
. . .
{
Laggings made of grids or nettings
}
E21D 11/155
. . .
{
Laggings made of strips, slats, slabs or sheet piles (longitudinal struts for mine arches E21D 11/28)
}
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)
}
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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)
}
E21D 11/183
. . .
{
Supporting means for arch members, not provided for in E21D 11/22
}
E21D 11/186
. . .
{
Pre-stressing or dismantling devices therefor
}
E21D 11/20
. . .
Special cross- sections, e.g. corrugated
{
(for props E21D 15/502; for caps E21D 17/01)
}
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
E21D 11/24
. . .
Knuckle joints or links between arch members
E21D 11/26
. . .
Shoes for connecting arch members to longitudinal struts
E21D 11/28
. .
Longitudinal struts,
{
i.e. longitudinal connections between adjoining arches
}
E21D 11/30
. .
Bases for lower arch members (for props E21D 15/54)
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
}
)
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E21D 11/36
. .
Linings or supports specially shaped for tunnels or galleries of irregular cross-section
E21D 11/362
. . .
{
for loading areas (lining shafts E21D 5/00)
}
E21D 11/365
. . .
{
for intersecting galleries
}
E21D 11/367
. . .
{
for junction with the longwall coal face (walking supports therefor E21D 23/0091)
}
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E21D 11/38
.
Waterproofing (in general E02D 31/00); Heat insulating; Soundproofing; Electric insulating (for building constructions in general E04B 1/62)
E21D 11/381
. .
{
Setting apparatus or devices
}
E21D 11/383
. .
{
by applying waterproof flexible sheets; Means for fixing the sheets to the tunnel or cavity wall
}
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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)
}
E21D 2011/386
. . .
{
inflatable
}
E21D 2011/388
. . .
{
having longitudinal cavities communicating with the exterior on the outer side of the lining elements
}
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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)
}
E21D 11/403
. .
{
combined with the head machine
}
E21D 2011/406
. .
{
Placing endless lining elements, e.g. from reels (in combination with a tunnelling shield E21D 2009/0614)
}
Large underground chambers; Methods or apparatus for making them (lining E21D 11/00)
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Guide Heading:
Working-face supports
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Props (in the building art E04G 25/00); Chocks,
{
e.g. made of flexible containers filled with backfilling material
}
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)
}
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E21D 15/005
.
{
characterised by the material
}
E21D 15/007
. .
{
spark-reducing
}
Collapse
E21D 15/02
.
Non-telescopic props
E21D 15/04
. .
with wooden prop parts joined by double conical connectors
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E21D 15/06
. .
with parts joined by a lock, with or without slight axial adjustability
E21D 15/08
. . .
with toggle joint connection
E21D 15/10
. . .
with dog-clutch or pin-and-hole connection
E21D 15/12
. . .
with locking devices located near head or foot
{
(E21D 15/08 and E21D 15/10 take precedence)
}
Collapse
E21D 15/14
.
Telescopic props (general means for fixing telescopic parts together
{
F16B 7/10
}
)
Collapse
E21D 15/15
. .
Means counteracting entry of dirt; Built-in cleaning devices
E21D 15/155
. . .
{
Built-in cleaning devices
}
Collapse
E21D 15/16
. .
with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure
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)
}
E21D 15/20
. . .
with pawl, pin, cross-piece, or the like engaging with ratchet teeth, notches, holes, or the like, spaced apart at intervals
E21D 15/22
. . .
with member, pin, cross- piece, or the like, ruptured, sheared through, or permanently deformed upon excessive pressure
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E21D 15/24
. . .
with axial screw-and-nut, rack-and-worm, or like mechanism
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
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E21D 15/28
. .
with parts held relatively to each other by friction or gripping
E21D 15/285
. . .
{
by means of wedges or wedge combinations (details of wedges E21D 15/43)
}
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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)
}
E21D 15/303
. . . .
{
by means of granular material (supporting by means of granular material E21D 15/18)
}
E21D 15/306
. . . .
{
by means of a liquid
}
Collapse
E21D 15/32
. . .
by a deformable collar
{
or clamping means applied symmetrically inside a locking ring
}
E21D 15/325
. . . .
{
by a clamping ring
}
E21D 15/34
. . .
by axially- moving balls, rollers, or the like
E21D 15/36
. . .
by a tiltable collar surrounding one or both parts
E21D 15/38
. . .
with longitudinally-divided upper or lower prop parts, e.g. interfitting laminations
E21D 15/40
. . .
Collar or other support gripped to one or both parts by toggle-action, cam, or other member pivoted or similarly mounted
E21D 15/42
. . .
with special parts to influence the friction
Collapse
E21D 15/43
. . .
Details of wedges (friction linings or pads E21D 15/42)
E21D 15/435
. . . .
{
hydraulic
}
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E21D 15/44
. .
Hydraulic, pneumatic, or hydraulic-pneumatic props
{
see also E21D 15/51
}
E21D 15/445
. . .
{
comprising a fluid cushion
}
E21D 15/45
. . .
having closed fluid system, e.g. with built-in pumps or accumulators
Collapse
E21D 15/46
. .
with load-measuring devices; with alarm devices
E21D 15/465
. . .
{
with essential hydraulic or pneumatic details
}
Collapse
E21D 15/48
.
Chocks or the like
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)
}
E21D 15/486
. .
{
with essential hydraulic or pneumatic details
}
Collapse
E21D 15/50
.
Component parts or details of props (E21D 15/43, E21D 15/58, E21D 15/60 take precedence)
E21D 15/502
. .
Prop bodies characterised by their shape, e.g. of specified cross-section
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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
}
E21D 15/512
. . .
{
Arrangement of valves (external control of roof support installations E21D 23/12, E21D 23/26)
}
E21D 15/515
. . .
{
Particular fluids not covered by any chemical subdivision
}
E21D 15/517
. . .
{
Extension elements
}
Collapse
E21D 15/52
. .
Extensible units located above or below standard props (for allowing step-by-step movement of cap E2123/06; setting props or chocks E21D 15/58)
E21D 15/523
. . .
{
with hydraulic or pneumatic control
}
E21D 15/526
. . .
{
for step-by-step extension of the prop
}
Collapse
E21D 15/54
. .
Details of the ends of props (for permitting step-by-step movement E21D 23/06)
E21D 15/545
. . .
{
hydraulic or pneumatic
}
E21D 15/55
. . .
of prop heads
{
or feet
}
Collapse
E21D 15/56
. .
Details of locks of telescopic props
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)
}
E21D 15/566
. . .
{
comprising a fluid cushion
}
Collapse
E21D 15/58
.
Devices for setting props or chocks
Collapse
E21D 15/581
. .
{
in which the props are pre- loaded (extensible elements at strut extremities E21D 15/52)
}
E21D 15/582
. . .
{
by means of power accumulators to be pre-charged by rock pressure (by means of hydraulically operated devices E21D 15/587)
}
E21D 15/583
. . .
{
in which the lock is also activated
}
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)
}
Collapse
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)
}
Collapse
E21D 15/586
. . .
{
the props being pre-loaded
}
E21D 15/587
. . . .
{
by means of power accumulators to be pre-charged by rock pressure
}
E21D 15/588
. . . .
{
the lock also being activated
}
E21D 15/589
. . .
{
in which a series of similarly shaped props are given almost equal load capacity by removable devices
}
Collapse
E21D 15/60
.
Devices for withdrawing props or chocks
E21D 15/603
. .
{
by means of hydraulic devices
}
E21D 15/606
. .
{
the props being moved systematically (mine roof supports for step-by-step movementE21D 23/00)
}
Collapse
Caps for supporting mine roofs
E21D 17/003
.
{
with essential hydraulic elements
}
E21D 17/006
.
{
characterised by the material
}
E21D 17/01
.
characterised by the shape of the cap, e.g. of specified cross-section
Collapse
E21D 17/02
.
Cantilever extension or similar protecting devices
E21D 17/0206
. .
{
Hydraulically operated extension devices
}
E21D 17/0213
. .
{
Assembling devices for pivoting caps upwardly
}
E21D 17/03
. .
Brackets for roof-supporting bars
E21D 17/04
. .
for use in longwall working
E21D 17/06
. .
for use in drifting galleries
Collapse
E21D 17/08
. .
Cap joints for obtaining a coal-face free of pit-props
E21D 17/082
. . .
of sliding type
E21D 17/086
. . .
or articulated type
E21D 17/10
.
Details of mine caps for engaging the tops of pit-props, with or without retaining-plates; Retaining-plates
Collapse
Provisional protective covers for working space (E21D 9/06, E21D 23/00 take precedence)
E21D 19/02
.
for use in longwall working
E21D 19/04
.
for use in drifting galleries
Collapse
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)
Collapse
E21D 20/003
.
{
Machines for drilling anchor holes and setting anchor bolts
}
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)
}
Collapse
E21D 20/02
.
with provisions for grouting
Collapse
E21D 20/021
. .
{
Grouting with inorganic components, e.g. cement
}
E21D 20/023
. . .
{
Cartridges; Grouting charges
}
Collapse
E21D 20/025
. .
{
Grouting with organic components, e.g. resin
}
E21D 20/026
. . .
{
Cartridges; Grouting charges
}
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)
}
Collapse
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
}
)
E21D 21/0006
.
{
characterised by the bolt material
}
E21D 21/0013
.
{
Protection against corrosion
}
E21D 21/002
.
{
using explosives charges
}
Collapse
E21D 21/0026
.
{
characterised by constructional features of the bolts
}
E21D 21/0033
. .
{
having a jacket or outer tube
}
E21D 21/004
. .
{
Bolts held in the borehole by friction all along their length, without additional fixing means
}
E21D 21/0046
. .
{
formed by a plurality of elements arranged longitudinally
}
E21D 2021/0053
. .
{
Anchoring-bolts in the form of lost drilling rods
}
E21D 2021/006
. .
{
Anchoring-bolts made of cables or wires
}
E21D 2021/0066
. .
{
Anchoring-bolts formed by a bundle of radially arranged rigid elements
}
E21D 2021/0073
. .
{
Anchoring-bolts having an inflatable sleeve, e.g. hollow sleeve expanded by a fluid
}
E21D 21/008
.
{
Anchoring or tensioning means
}
E21D 21/0086
.
{
Bearing plates
}
E21D 21/0093
.
{
Accessories
}
E21D 21/02
.
having means for indicating tension (screwed connections specially modified for indicating tensile load F16B 31/02)
Collapse
Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyers, mining machines, or guides therefor (
{
transport of mine roof support units E21F 13/008;
}
shifting of mine conveyers at the working face E21F 13/08)
Collapse
E21D 23/0004
.
{
along the working face
}
E21D 23/0008
. .
{
comprising a pair of joined struts
}
E21D 23/0013
. .
{
Frame type supports
}
Collapse
E21D 23/0017
. .
{
Pile type supports
}
E21D 23/0021
. . .
{
comprising two walking elements
}
E21D 23/0026
. . .
{
comprising three walking elements
}
E21D 23/003
. . .
{
consisting of a rigid pile
}
Collapse
E21D 23/0034
. .
{
comprising a goaf shield articulated to a base member
}
E21D 23/0039
. . .
{
and supported by a strut or by a row of struts parallel to the working face
}
E21D 23/0043
. . .
{
and supported by two or more rows of struts parallel to the working face
}
E21D 23/0047
.
{
without essential shifting devices
}
E21D 23/0052
.
{
with advancing shifting devices connected therewith
}
E21D 23/0056
.
{
with individual advancing shifting devices
}
Collapse
E21D 23/006
.
{
provided with essential hydraulic devices
}
E21D 23/0065
. .
{
driven, or automatically, e.g. electrically-hydraulically controlled
}
E21D 23/0069
. .
{
without essential advancing shifting devices
}
E21D 23/0073
. .
{
with advancing shifting devices connected therewith
}
E21D 23/0078
. .
{
with individual shifting devices
}
E21D 23/0082
.
{
specially adapted for vertical or steep gradient seams
}
Collapse
E21D 23/0086
.
{
in galleries
}
E21D 23/0091
. .
{
at the junction with the working face
}
E21D 23/0095
. .
{
Temporary supports at the driving front
}
E21D 23/03
.
having protective means, e.g. shields, for preventing or impeding entry of loose material into the working space or support
Collapse
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)
E21D 23/0409
. .
{
Aligning or guiding means for the supports or for the constitutive parts of the supports
}
E21D 23/0418
. .
{
Positioning devices and stabilizing means for the props
}
E21D 23/0427
. .
{
Shield operating devices; Hinges therefor
}
E21D 23/0436
. .
{
Means for inclining the base member of the support
}
E21D 23/0445
. .
{
Extensions of the base member supporting the conveyer
}
E21D 23/0454
. .
{
Trailing plates; Coal face or goaf side sprags (specially adapted for the placing of filling-up materials E21D 23/0481)
}
E21D 23/0463
. .
{
Hanging or shifting means for tubes, electric feeding cables or the like
}
E21D 23/0472
. .
{
Supports specially adapted for people walking or transporting material
}
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)
}
WARNING
-
Group E21D 23/0481 is not complete. See also other groups of E21D 23/00

E21D 23/049
. .
{
Connecting devices between the head or foot of a prop and the cap or base of the roof support
}
Collapse
E21D 23/06
. .
Special mine caps or special tops of pit-props for permitting step-by-step movement
E21D 23/063
. . .
{
Retractable cantilever extensions therefor
}
E21D 23/066
. . .
{
Pivoted cantilever extensions therefor
}
Collapse
E21D 23/08
.
Advancing mechanisms (E21D 23/16 takes precedence)
Collapse
E21D 23/081
. .
{
forming parts of the roof supports
}
E21D 23/082
. . .
{
acting solely on the elements of the supports
}
E21D 23/083
. . .
{
acting on a firm abutment adapted thereto
}
Collapse
E21D 23/085
. . .
{
acting on a conveyer or a guide for the mining machine
}
E21D 23/086
. . . .
{
Details of fixing devices therefor
}
Collapse
E21D 23/087
. . .
{
acting directly on the walls of the seam
}
E21D 23/088
. . . .
{
by means of wheels, rollers, caterpillars, belts or worm screws
}
E21D 23/10
. .
with advancing devices separate from the supporting construction
Collapse
E21D 23/12
.
Control, e.g. using remote control (E21D 23/16 takes precedence)
Collapse
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 conveyers toward the working face E21D 23/085
}
)
E21D 2023/142
. . .
{
Measuring the advance of support units with respect to external points of reference
}
E21D 2023/144
. . .
{
Measuring the advance of support units with respect to internal points of reference, e.g. with respect to neighbouring support units or extension of a cylinder
}
E21D 2023/146
. . .
{
Transmission of signals and commands by cable
}
E21D 2023/148
. . .
{
Wireless transmission of signals and commands
}
Collapse
E21D 23/16
.
Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices
Collapse
E21D 23/18
. .
of advancing mechanisms
E21D 23/20
. . .
for sequential movement, e.g. one behind the other
E21D 23/22
. . .
incorporated in mine caps
E21D 23/24
. . .
the advancing mechanisms being separate from the supporting construction
E21D 23/26
. .
Hydraulic or pneumatic control
This page is owned by Office of Patent Classification.
Last Modified: 10/10/2013