CUTTER FOR GRADER AND GRADER FOR GRADING DEVICES Russian patent published in 2015 - IPC E21C27/34 

FIELD: process engineering.

SUBSTANCE: set of inventions relates to cutters to be attached to grader body element and to underground extraction graders, particularly, to development of steeply inclined coal seams. Grader comprises body with means to guide it in its guides, cutters with multiples seats for individual cutters. Grader comprises split body with two main elements and body mid element to be fitted between said main elements and tool plate attached to grader body mid element. Tool plate front has recesses for fixation of cutter seats while its rear has slitted recess for rigid connection of fixation ledge made at grader body mid element. Tool plate rear part front end has longer top part and shorter locking part with slitted recess made there between.

EFFECT: reliable attachment of cutters, optimized development of minerals.

16 cl, 9 dwg