E21D23/006 - CPC Classification Index

ClassID:

136201 ⎘

E21D23/006 - 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 provided with essential hydraulic devices

Sub-classes:

E21D23/0065 » {driven, or automatically, e.g. electrically-hydraulically controlled} 2
E21D23/0069 » {without essential advancing shifting devices} 1
E21D23/0073 » {with advancing shifting devices connected therewith} 3
E21D23/0078 » {with individual shifting devices} 3

Recent Application in this class:

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2023-10-26

Distributed coal cutting device for longwall face of coal mine

20220136390

2022-05-05

Method and device for monitoring operation of a mining machine unit

20220090697

2022-03-24

Magnetically controlled material-based magnetorheological pilot operated safety valve for hydraulic support, and applications of the same

20170260859

2017-09-14

Float-swing hydraulic support

20160265685

2016-09-15

Hydraulic assembly for a mining system

20140286713

2014-09-25

Prop head bearing device for shield supports