E21D23/04 - CPC Classification Index

ClassID:

136211 ⎘

E21D23/04 - CPC Classification

Classification description:

Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor 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

Sub-classes:

E21D23/0409 » {Aligning or guiding means for the supports or for the constitutive parts of the supports} 1
E21D23/0418 » {Positioning devices and stabilizing means for the props} 2
E21D23/0427 » {Shield operating devices; Hinges therefor} 3
E21D23/0436 » {Means for inclining the base member of the support} 4
E21D23/0445 » {Extensions of the base member supporting the conveyer} 0
E21D23/0454 » {Trailing plates; Coal face or goaf side sprags } 2
E21D23/0463 » {Hanging or shifting means for tubes, electric feeding cables or the like} 1
E21D23/0472 » {Supports specially adapted for people walking or transporting material} 1
E21D23/0481 » {Supports specially adapted for use in combination with the placing of filling-up materials } 7
E21D23/049 » {Connecting devices between the head or foot of a prop and the cap or base of the roof support} 4
E21D23/06 » Special mine caps or special tops of pit-props for permitting step-by-step movement 8

Recent Application in this class:

20250116192

ASYMMETRIC HYDRAULIC SUPPORTS FOR PSEUDO INCLINED MINING IN STEEPLY DIPPING SEAM

20250003337

Ventilation method for high gas working face based on alternating intake and air return in mine gallery

20240247551

Tunneling System

20230383653

COAL-BASED SOLID WASTE TRANSPORT AND FILLING INTEGRATED MACHINE MINING SYSTEM AND METHOD

20210010373

Hydraulic support monitoring support pose in real time based on inertia measurement unit and detection method thereof

20170260859

Float-swing hydraulic support

20170019641

Longwall face support in an underground mine

20150345293

SUPPORT CHANNEL

20150086272

Self-moving tunnel support canopy

20140286713

Prop head bearing device for shield supports

20120230775

Shield canopy for a shield-type support

20120180467

ADVANCING ASSEMBLY AND POWERED SHIELD SUPPORT HEREWITH

20110097158

Shield support assembly for underground mining and supporting surface element therefor

18095109

Swing arm plow apparatuses and methods

17524992

Similar simulation experimental device of hydraulic energy-absorbing roadway support