GATES WITH INCREASED ANTI-RAM STRENGTH Russian patent published in 2015 - IPC E06B5/11 

FIELD: construction.

SUBSTANCE: gates include two flat wings 1, 2 arranged inside rectangular steel frame 3 stiffly attached along the outline to protected object 4 and to ground 5. Wings of gates are suspended by means of loops 7 to lateral sides of the frame so that they can be turned and provided with an impact energy diverting device mounted on them, which represents a system of blind holes 9, 10 in end faces of the wings and through-type holes 11 along the whole outline of the frame, which are coaxial to the corresponding holes in the wings. One end of helical spring 12 is attached to the bottom of the blind holes, and the other end of the same spring is attached to longitudinal cylindrical limit stop 13 freely inserted into the hole. The spring is fixed in the hole in a pre-stressed compressed state by means of annular sleeve 14 tightly recessed with a pre-load into the edge of the hole, which is made from brittle material destructed at the pre-specified force of impact action on the gates.

EFFECT: increasing anti-ram strength.

1 dwg