E21C - CPC Classification
Classification description:
Sub-classes:
- E21C1/00 » Drilling machines 24
- E21C1/00 » Rotary-drilling machines 24
- E21C11/00 » Supports or guides for drilling machines; Columns to which the machine is clamped 4
- E21C25/00 » Cutting, Slitting, Dislodging 12
- E21C25/00 » Cutting, Slitting, Dislodging 12
- E21C25/00 » Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam 12
- E21C25/00 » Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam 12
- E21C27/00 » Machines which completely free the mineral from the seam 12
- E21C29/00 » Propulsion of machines for slitting or completely freeing the mineral from the seam 2
- E21C3/00 » Drilling machines with reciprocating tool that is intermittently turned when out of contact with the working face 2
- E21C31/00 » Driving means incorporated in machines for slitting or completely freeing the mineral from the seam 2
- E21C33/00 » Trucks or other devices for transporting machines for slitting or completely freeing the mineral from the seam 2
- E21C35/00 » Miscellaneous items relating to machines for slitting or completely freeing the mineral from the seam 80
- E21C37/00 » Other methods or devices for dislodging with or without loading 44
- E21C39/00 » Devices for testing in situ the hardness or other properties of minerals, e.g. for giving information as to the selection of suitable mining tools 57
- E21C41/00 » Methods of mining or quarrying; Open-pit mining; Layouts therefor 41
- E21C41/00 » Methods of mining or quarrying; Open-pit mining; Layouts therefor 41
- E21C41/00 » Methods of underground or surface mining ; Lay-outs therefor 41
- E21C41/00 » Methods of underground or surface mining ; Lay-outs therefor 41
- E21C43/00 » Methods for preparing for the gasification of coal underground 2
- E21C45/00 » Methods of hydraulic mining; Hydraulic monitors 13
- E21C47/00 » Machines for obtaining or the removal of materials in open-pit mines 69
- E21C49/00 » Obtaining peat; Machines therefor 0
- E21C5/00 » Details of drilling apparatus 6
- E21C5/00 » Devices for feeding tool to working face 6
- E21C50/00 » Obtaining minerals from underwater, not otherwise provided for 76
- E21C51/00 » Apparatus for, or methods of, winning materials from extraterrestrial sources 39
- E21C7/00 » Dust eliminating or dust removing while drilling 3
