HIGH-CAPACITY TRANSPORT FACILITY TIRE TREAD Russian patent published in 2011 - IPC B60C11/04 

FIELD: transport.

SUBSTANCE: proposed tread comprises multiple grooves of lengthwise and main crosswise directions (2b, 2c, 31, 32). Grooves of lengthwise direction comprise G-deep main grooves (2b, 2c) and G'-deep auxiliary grooves, depth G being smaller than depth G of the main grooves. Note here that central tread part (C) formed by two lengthwise direction grooves with width making 0.25-0.5 of tread width W, has, at least, one main lengthwise direction groove (2c) with mean depth G. Note also that depth G' of auxiliary grooves (31, 32) makes 0.4-0.6 of depth G of main grooves (2b, 2c). Crosswise grooves (5c) of the ribs of central part (C) comprise jointing strip (6c) with its surface along radius of outer side located at the distance of He from running surface making 0.4-0.6 of depth G of the main grooves. Crosswise grooves (5b) of the ribs of each edge (B) comprise jointing strip (6c) that prevents closing of crosswise grooves, strip surface along radius of outer side located at distance Hs from running surface equal to 0.3 of depth G of the main grooves.

EFFECT: higher operating performances.

8 cl, 6 dwg