CONVEYANCE SYSTEM WITH TOOTHED RACKS (VERSIONS) Russian patent published in 2015 - IPC E21C35/00 

FIELD: transport.

SUBSTANCE: invention relates to conveyance systems with toothed racks and to retainers of the latter used in underground working of long work face. This system comprises toothed racks each having spaced apart teeth extending between side sections arranged at opposite sides of said rack. Retainer has two spaced apart sidewalls secured to the bed and bores extending there through. Note here that one side section has cavity to accommodate one of the holder sidewalls and confined by side section spaced apart beads. Every said bead has through bore. Bores in said beads are aligned with bores in the holder side walls. Pin can be fitted through sidewall bores and side section bead bores. Note here that spaced apart side sections are arranged so that outer boundary composed by said teeth is located approx. at the same level as the pin for retention of said rack in the holder.

EFFECT: decreased height of rack, possibility of header operation in seam seams.

3 cl, 8 dwg