ROAD BLOCKER Russian patent published in 2017 - IPC E01F13/12 

FIELD: transport.

SUBSTANCE: invention relates to the hindering the vehicles traffic means, in particular to anti-ram devices intended to prevent the unauthorized vehicles entry into the protected sites territory by forced stopping of wheeled vehicles. The road blocker includes a steel base, lifting platform, drive, drive shaft and swivel arm. On the drive shaft between the drive and the pivot arm there is at least one annular groove with shaft diameter depth 0.1-0.25, shaft diameter width of 0.1-1.0.

EFFECT: invention provides an increase in the road blocker reliability, protecting the drive and other moving parts of the construction, improving maintainability.