US Patent 10900181 Portable drop arm vehicle barrier

A vehicle gate assembly includes a base having a width extending laterally to provide a vehicle passage and a depth extending perpendicular to the width from a front edge to a back edge, a hinge post extending vertically from the base on a first lateral side of the vehicle passage, a latch post assembly extending vertically from the base on a second lateral side of the vehicle passage, the latch post assembly includes first and second latch posts each having an inner face, a J-slot formed on the inner face of each of the first and second latch posts, and a barrier beam having a first end pivotally connected to the hinge post and a second end connectable with the J-slots.