E
SECTION E — FIXED CONSTRUCTIONS
  
BUILDING
 E21
MINING
 E21D
SHAFTS; SINKING SHAFTS; GALLERIES; LINING GALLERIES
 E21D 1/00 - 
E21D 7/00
Shafts
 E21D 1/00
Sinking shafts
 E21D 1/02
·  by hand
 E21D 1/03
·  mechanically (E21D 1/08 takes precedence)
 E21D 1/04
·  ·  with grabs
 E21D 1/06
·  ·  with shaft-boring cutters (drilling machines E21B, E21C)
 E21D 1/08
·  while moving the lining downwards
 E21D 1/10
·  Preparation of the ground
 E21D 1/12
·  ·  by freezing
 E21D 1/14
·  ·  ·  Freezing apparatus
 E21D 1/16
·  ·  by petrification (grouting anchoring-bolts E21D 20/02)
 E21D 3/00
Raising shafts, i.e. working upwards from the bottom
 E21D 5/00
Lining shafts
 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)
 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
 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
 E21D 7/00
Shaft equipment, e.g. timbering within the shaft
 E21D 7/02
·  Arrangement of guides for cages in shafts; Connection of guides for cages to shaft walls (guides or shoes fixed on cages B66B)
 E21D 9/00 - 
E21D 13/00
Galleries
 E21D 9/00
Driving galleries, e.g. using ripping machines (driving-machines E21C 25/00-E21C 35/24, especially E21C 27/00; drift boring E21C 19/00)
 E21D 9/02
·  Driving inclined galleries
 E21D 9/04
·  Driving galleries through loose materials
 E21D 11/00
Lining galleries, e.g. supporting linings
 E21D 11/02
·  with wood
 E21D 11/03
·  ·  using timber-setting machines
 E21D 11/04
·  with building materials
 E21D 11/05
·  ·  using compressible insertions
 E21D 11/06
·  ·  with bricks
 E21D 11/07
·  ·  ·  using brick-laying machines
 E21D 11/08
·  ·  preformed concrete or other lagging slabs
 E21D 11/10
·  ·  with concrete cast in situ; Shuttering or other equipment adapted therefor
 E21D 11/12
·  ·  Temporary supports for use during building; Accessories
 E21D 11/14
·  with iron or steel, e.g. with auxiliary parts of other materials, supporting rings
 E21D 11/16
·  ·  Linings specially shaped for galleries of irregular cross-section (road-head supports connected to working-face supports E21D 15/00, E21D 17/00, E21D 23/00)
 E21D 11/18
·  ·  Arch members
 E21D 11/20
·  ·  ·  Special cross-sections, e.g. corrugated
 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
 E21D 11/30
·  ·  Bases for lower arch members (for props E21D 15/54)
 E21D 11/32
·  ·  Laggings
 E21D 11/34
·  ·  Joints between vertical props and horizontal top bars (end caps forming part of the props E21D 15/54)
 E21D 13/00
Driving or making large working spaces, e.g. for pumps, for loading (driving-machines E21C 25/00-E21C 35/24)
 E21D 13/02
·  Methods
 E21D 13/04
·  Special equipment; Accessories
 E21D 15/00 - 
E21D 23/00
Working-face supports
 E21D 15/00
Props (in the building art E04G 25/00); Chocks
 E21D 15/02
·  Non-telescopic props
 E21D 15/04
·  ·  with wooden prop parts joined by double conical connectors
 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 15/14
·  Telescopic props (general means for fixing telescopic parts together F16B)
 E21D 15/15
·  ·  Means counteracting entry of dirt; Built-in cleaning devices
 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. rubbish, sand, bitumen, lead, located in the other part, with or without expulsion or displacement of the medium upon excessive pressure
 E21D 15/20
·  ·  ·  with pawl, pin, cross-piece, etc. engaging with ratchet teeth, notches, holes, etc. spaced apart at intervals
 E21D 15/22
·  ·  ·  with member, pin, cross-piece, etc. ruptured, sheared through, or permanently deformed upon excessive pressure
 E21D 15/24
·  ·  ·  with axial screw-and-nut, rack-and-worm, or like mechanism
 E21D 15/26
·  ·  ·  ·  with screw, worm, etc. not self-locking but normally prevented from rotation by friction members which slip upon excessive pressure
 E21D 15/28
·  ·  with parts held relatively to each other by friction or gripping, e.g. using wedges
 E21D 15/30
·  ·  ·  by means expanded or contracted by pressure applied through the medium of a fluid or quasi-fluid, e.g. rubber
 E21D 15/32
·  ·  ·  by a deformable collar
 E21D 15/34
·  ·  ·  by axially-moving balls, rollers, etc.
 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
 E21D 15/43
·  ·  ·  Details of wedges (friction linings or pads E21D 15/42)
 E21D 15/44
·  ·  Hydraulic, pneumatic, or hydraulic-pneumatic props
 E21D 15/45
·  ·  ·  having closed fluid system, e.g. with built-in pumps or accumulators
 E21D 15/46
·  ·  with load-measuring devices; with alarm devices
 E21D 15/48
·  Chocks or the like
 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
 E21D 15/51
·  ·  specially adapted to hydraulic, pneumatic, or hydraulic-pneumatic props, e.g. arrangements of relief valves
 E21D 15/52
·  ·  Extensible units located above or below standard props
 E21D 15/54
·  ·  Details of the ends of props (for permitting step-by-step movement E21D 23/06)
 E21D 15/55
·  ·  ·  of prop heads
 E21D 15/56
·  ·  Details of locks of telescopic props
 E21D 15/58
·  Devices for setting props
 E21D 15/582
·  ·  for mechanical props
 E21D 15/59
·  ·  for hydraulic, pneumatic, or hydraulic-pneumatic props
 E21D 15/60
·  Devices for withdrawing props or chocks
 E21D 17/00
Caps for supporting mine roofs
 E21D 17/01
·  characterised by the shape of the cap, e.g. of specified cross-section
 E21D 17/02
·  Cantilever extension or similar protecting devices
 E21D 17/022
·  ·  Auxiliary devices for temporary support of roof-supporting beams whilst assembling
 E21D 17/03
·  ·  Brackets for roof-supporting bars
 E21D 17/04
·  ·  for use in longwall working
 E21D 17/05
·  ·  ·  hydraulically extensible
 E21D 17/054
·  ·  ·  hydraulically pivotable
 E21D 17/06
·  ·  for use in drifting galleries
 E21D 17/08
·  ·  Cap joints for obtaining a coal-face free of pit-props
 E21D 17/082
·  ·  ·  of sliding type
 E21D 17/086
·  ·  ·  of articulated type
 E21D 17/10
·  Details of mine caps for engaging the tops of pit-props, with or without retaining-plates; Retaining-plates
 E21D 19/00
Working shields; Protective covers for working space
 E21D 19/02
·  for use in longwall working
 E21D 19/04
·  for use in drifting galleries
 E21D 20/00
Setting anchoring-bolts
 E21D 20/02
·  with provisions for grouting
 E21D 21/00
Anchoring-bolts for roof, floor, or shaft-lining protection
 E21D 21/02
·  having means for indicating tension (screwed connections specially modified for indicating tensile load F16B 31/02)
 E21D 23/00
Mine roof supports for step-by-step movement, e.g. in combination with provisions for shifting of conveyers, mining machines, or guides therefor (shifting of mine conveyers per se at the working face E21F 13/08)
 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 23/06
·  ·  Special mine caps or special tops of pit-props for permitting step-by-step movement
 E21D 23/08
·  Advancing mechanisms (E21D 23/16 takes precedence)
 E21D 23/10
·  ·  with advancing-devices separate from the supporting construction
 E21D 23/12
·  Control, e.g. using remote control (E21D 23/16 takes precedence)
 E21D 23/14
·  ·  Effecting automatic sequential movement of supports, e.g. one behind the other
 E21D 23/16
·  Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices
 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