E21C27/32 - CPC Classification Index

ClassID:

135817 ⎘

E21C27/32 - CPC Classification

Classification description:

Machines which completely free the mineral from the seam; Mineral freed by means not involving slitting by adjustable or non-adjustable planing means with or without loading arrangements

Sub-classes:

E21C27/34 » Machine propelled along the working face by cable or chain 15
E21C27/36 » Machine self-propelled along the working face 7
E21C27/38 » Machine stationary while planing in an arc 3
E21C27/40 » Machine and its planing tool making alternative step-wise movements along the working face 0
E21C27/42 » combined with scraper or collector box 1
E21C27/44 » Planing knives 3

Recent Application in this class:

20200049004

2020-02-13

Shearing system for longwall mining

20170292378

2017-10-12

Plow guide assembly for plow guides

20160123145

2016-05-05

Control method for longwall shearer

20160061031

2016-03-03

Pan pitch control in a longwall shearing system

20150204191

2015-07-23

Fluid tank balancing system for mining machine

20140252842

2014-09-11

Mining machine with driven disc cutters

20140203621

2014-07-24

System for controlling speed of travel in a longwall shearer

20130057044

2013-03-07

Mining machine with driven disc cutters

20120038204

2012-02-16

Ploughing device for mining and plough body for said device

#10

20110227397

2011-09-22

Mining machine with driven disc cutters

#11

20100219676

2010-09-02

Roller drill or roller bit

#12

20090058172

2009-03-05

Mining machine with driven disc cutters

#13

20070090677

2007-04-26

Mining plow