E21C31/04 - CPC Classification Index

ClassID:

135846 ⎘

E21C31/04 - CPC Classification

Classification description:

Driving means incorporated in machines for slitting or completely freeing the mineral from the seam for cutting or breaking-down devices imparting both a rotary and reciprocating motion

Recent Application in this class:

20240141784

2024-05-02

Roadway/tunnel excavation robot and automatic cutting control method

20210317740

2021-10-14

Gravel excavation system

20170009579

2017-01-12

RECIPROCATING IMPACT SLACK-DROP/ROTATING/RAKING MULTIFUNCTIONAL POWER SHAFT

20170002656

2017-01-05

Non-concentric protruding shaft fixed bearing reciprocating impact part for implementing reciprocating impact part non-concentric protruding shaft fixed bearing method

20120187743

2012-07-26

Method of controlling a miner to cause wobble in the cutting heads

20110181097

2011-07-28

Mining machine with driven disc cutters