Patent ID: 6076303
Filing Date: 2000-06-20
Classification: E05G,E05Y

Abstract:
A filtering gate for the protection of a site, comprising:two boxes, having a generally rectangular base, arranged side by side and forming two corridors, placed side by side, which allow communication between an inside front of said boxes, for facing an inside of the site, and an external front of said boxes, for facing an exterior of the site;a first pair of leaves, located at said inside front of said boxes arranged side by side, said leaves being movable parallel with respect to each other and transverse to a flow passing in said corridors, each leaf being movable independent of the other leaf of the pair, between a first position in which it blocks passage through one of said corridors and a second position in which it blocks passage through the other of said corridors; anda second pair of leaves, located at said external front of said boxes arranged side by side, said leaves being movable parallel with respect to each other and transverse to the flow passing in said corridors, each leaf being movable independent of the other leaf of the pair, between a first position in which it blocks the passage through one of said corridors and a second position in which it blocks the passage through the other of said corridors,wherein, in a normal operating mode, the movement of one leaf of each pair is immediately followed by the movement of the other leaf of the same pair, as soon as the first leaf of the pair has completed moving between said positions, the movement of each leaf of one of the two pairs of leaves occurring simultaneously with the movement of a corresponding leaf of the other pair of leaves.