Patent ID: 8020603

Claim:
A blocking element for a gate used as a checkpoint, which comprises two blocking vanes each of which are in a form of a circle sector and are mounted, by way of a tapering sector inner side of the blocking vanes and such that the blocking vanes can pivot about a horizontally directed pivot axis, on a support which is arranged in a housing and in response to a signal, in a manner driven by a drive motor, can slide one into the other in a telescopic manner from a position which blocks a passage of the gate, in order to open the passage of the gate, and can be drawn apart from one another in order to again block the passage of the gate, characterized in that the two blocking vanes ( 4 , 4 ′) are mounted close to a floor of the gate such that the blocking vanes ( 4 , 4 ′) can pivot about the common horizontally directed pivot axis ( 5 ) and a radius of the blocking vanes ( 4 , 4 ′) corresponds approximately to a height of the support ( 2 ) and a height of the housing, and in that the two blocking vanes ( 4 , 4 ′) can be driven by the drive motor ( 7 ) in a manner controlled only by means of a lever system ( 10 , 13 , 14 ).