E21D23/0052 - CPC Classification Index

ClassID:

136199 ⎘

E21D23/0052 - 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 with advancing shifting devices connected therewith

Recent Application in this class:

20220136390

2022-05-05

Method and device for monitoring operation of a mining machine unit

20210270134

2021-09-02

CONSTRUCTION METHOD FOR CONTINUOUS MINING MACHINE HAVING DEVICE CONTINUOUSLY PROVIDING PROVISIONAL ROOF SUPPORT

20170152746

2017-06-01

Advancing ram pin retention device

20140369769

2014-12-18

System and method for enabling machine movement

20140030030

2014-01-30

MINE BOLTER

20130193744

2013-08-01

Apparatus for forming an underground tunnel