E21D23/0039 - CPC Classification Index

ClassID:

136196 ⎘

E21D23/0039 - 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 along the working face comprising a goaf shield articulated to a base member and supported by a strut or by a row of struts parallel to the working face

Recent Application in this class:

20140097067

2014-04-10

Longwall equipment with a hydrostatic tube balance thereon for determining the height position of individual elements of the longwall equipment

20120180467

2012-07-19

ADVANCING ASSEMBLY AND POWERED SHIELD SUPPORT HEREWITH

20110006584

2011-01-13

Method for automatically producing a defined face opening in plow operations in coal mining