E21D23/0017 - CPC Classification Index

ClassID:

136191 ⎘

E21D23/0017 - 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 Pile type supports

Sub-classes:

E21D23/0021 » {comprising two walking elements} 0
E21D23/0026 » {comprising three walking elements} 0
E21D23/003 » {consisting of a rigid pile} 0

Recent Application in this class:

20110006586

2011-01-13

Longwall mining roof supports