by cable or chains

Introduced: September 1968

Full Title

Propulsion of machines for slitting or completely freeing the mineral from the seam > by cable or chains

IPC and CPC are identically structured here. All 3 subcodes exist in both systems.

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E21C 29/06 anchored at one or both ends to the mine working face IPC+CPC Available in IPC and CPC
E21C 29/14 by haulage cable or chain pulling the machine along the working face +1 CPC IPC+CPC Available in IPC and CPC
E21C 29/20 with safety devices operating in the event of breakage of the cable or chain IPC+CPC Available in IPC and CPC