Locking device for public highway infrastructures comprises unit sheltering locking mechanism coupled to driving arm having cavity into which key fits

摘要

The locking device comprises a unit (1) sheltering a locking mechanism coupled to a driving arm (2) emerging from the unit. The arm has a cavity (3) in its emerging part and a key (4) has an expansible diameter shank which fits the cavity and adheres to its wall to cause driving of the arm and an action on the mechanism locking.