GUARD FOR MOTOR TRANSPORT Russian patent published in 2014 - IPC E01F13/12 

FIELD: transport.

SUBSTANCE: motor transport guard comprises supporting folding structure composed of crossed bands articulated at cross points and at the ends to make scissor mechanism and damaging elements composed by detachable tenons fitted on pins. Said tenons are composed of tubes with the cut made at tenon top at the angle of 15-45 degrees to tenon lengthwise axis. Note here that tenon ID makes 0.50-0.95 of tenon OD Pins feature height of 0.2-0.8 of tenon height and diameter of 0.75-0.95 of tenon ID.

EFFECT: reliable tenon fixing in the guard, efficient penetration in the wheels.