E21C27/28 - CPC Classification Index

ClassID:

135815 ⎘

E21C27/28 - CPC Classification

Classification description:

Machines which completely free the mineral from the seam; Mineral freed by means not involving slitting by percussive drills with breaking-down means, e.g. wedge-shaped tools

Recent Application in this class:

20210156250

2021-05-27

Advance and Retreat Automatic Control Method Based on Hydraulic Sensing Conversion and Advance and Retreat Automatic Control System Based on Hydraulic Sensing Conversion

20210140316

2021-05-13

RECIPROCATING IMPACT BEVEL TOOTH DISCHARGING SHOVEL OF RECIPROCATING IMPACT MINING MACHINE

20200032649

2020-01-30

Rock cutting assembly

20180195388

2018-07-12

Drilling and bursting heading machine

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

20160265355

2016-09-15

METHOD FOR RECIPROCATING PUNCHING/RAKING/LOADING BY POWER BOX ON EXCAVATOR, AND EXCAVATOR HAVING POWER BOX CAPABLE OF RECIPROCATING PUNCHING/RAKING/LOADING

20150322784

2015-11-12

METHOD OF DEVICE FOR CONVERTING ROTARY MOTION TO RECIPROCATING PERCUSSION MOTION AND DEVICE FOR CONVERTING ROTARY MOTION TO RECIPROCATING PERCUSSION MOTION THAT IMPLEMENTS THE METHOD