E21D23/081 - CPC Classification Index

ClassID:

136226 ⎘

E21D23/081 - 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; Advancing mechanisms forming parts of the roof supports

Sub-classes:

E21D23/082 » {acting solely on the elements of the supports} 1
E21D23/083 » {acting on a firm abutment adapted thereto} 0
E21D23/085 » {acting on a conveyer or a guide for the mining machine} 2
E21D23/087 » {acting directly on the walls of the seam} 0

Recent Application in this class:

20200049006

2020-02-13

Self-advancing roof support for a longwall mining system