A barrier for use with a gate assembly includes a quadrilateral frame comprising top and bottom horizontal members and first and second vertical members, a horizontal gate beam extending longitudinally from a buttress end to a latch end, the gate beam constructed of a W-beam having a web oriented horizontally and extending laterally between first and second flanges, a first stop connected to the buttress end and extending perpendicular to the first and second flanges, a first latch connected to the latch end, the first latch forming a hook comprising a shank extending longitudinally from the latch end, a point located opposite the shank, a gap between the point and the shank, and an opening between the point and the latch end, and the gate beam connected to the frame between the top and bottom horizontal members.

According to an aspect of some embodiments of the present invention there is provided a piston mounted on and fixedly fastened to a ball screw nut, the nut threaded onto a ball screw. By mechanically rotating the piston and preventing the ball screw from rotating, the balls screw nut rotates, thereby raising or lowering the ball screw, thereby raising or lowering the piston, thereby raising or lowering a casing, for example a bollard, mounted on the piston. The casing may be raised or lowered by attaching a handle to the piston and rotating the handle.

A pneumatic drive mechanism for converting linear motion from compressed air into rotational motion for use in fare gates and other applications.

A unidirectionally bendable transmission chain is provided. At a first side thereof, an inner stop plate is fixed between a pair of inner chain plates at both ends of pin shafts, and an outer stop plate is fixed between a pair of outer chain plates at both ends of the pin shafts. Both ends of the inner stop plate are flush with axes of pin holes provided at both ends of the inner chain plates, and both ends of the outer stop plate are respectively provided with extensions beyond the outer chain plates; the extensions of the outer stop plate form a one-sided support for the inner stop plate to prevent the transmission chain from bending toward the first side, thus the transmission chain bends unidirectionally toward a second side opposite to the first side. A hoisting mechanism and a liftable roadblock having the above transmission chain are further provided.

An exemplary crash gate to guard against motor vehicles crossing a roadway in a direction from an attack side to a protected side including a buttress post assembly secured below ground in a first concrete foundation on a side of the roadway, the buttress post assembly having two buttress posts forming a barrier passage, a latch post assembly secured below the ground in a second concrete foundation on an opposite side of the roadway, the latch post assembly having two latch posts forming a latch gap, a barrier with a gate beam disposed in the barrier passage and extending from a buttress end to a latch end, and one of a vertical pin or a hook connected to the latch post assembly and positioned in the latch gap and the other one of the vertical pin or the hook located on the latch end, when the barrier is in a closed position the latch end is located in the latch gap and the vertical pin is positioned outside of the hook.

A bollard device (1) comprising an outer bollard member (2) and an inner bollard member (3) which is provided to be displaceable between a retracted position wherein the inner bollard member (3) substantially extends within an interior space (4) of the outer bollard member (2), and an extended position wherein part of the inner bollard member (3) extends above the outer bollard member (2) wherein the inner bollard member (3) comprises an upper part (5) and a lower part (6), wherein in the extended position the upper part (5) substantially extends above the outer bollard member (2) and the lower part (6) substantially extends within the interior space (4), wherein the lower part (6) of the inner bollard member (3) comprises at least two reinforcement elements (10a, 10b) wherein these reinforcement elements (10a, 10b) form protrusions of the inner bollard member (3).

According to an aspect of some embodiments of the present invention there is provided a piston mounted on and fixedly fastened to a ball screw nut, the nut threaded onto a ball screw. By mechanically rotating the piston and preventing the ball screw from rotating, the balls screw nut rotates, thereby raising or lowering the ball screw, thereby raising or lowering the piston, thereby raising or lowering a casing, for example a bollard, mounted on the piston. The casing may be raised or lowered by attaching a handle to the piston and rotating the handle.

A safety barrier assembly is provided for a parking garage is positioned in proximity to an opening for a VRC and includes a horizontal AGV safety beam and upper and lower pedestrian barriers having horizontal railings and vertical legs. The vertical legs are telescoped into openings at opposite ends of the AGV safety beam. The vertical legs of the upper pedestrian barrier are longer than those of the lower pedestrian barrier. The AGV safety beam can be moved vertically between a lower position where the AGV safety beam is substantially adjacent a floor of the parking garage and an upper position where the AGV safety beam is elevated from the floor. The horizontal railings of the pedestrian barriers are parallel to and spaced above the AGV safety beam in the lower position. However, the horizontal railings abut the AGV safety beam in the upper position.

A deployable vehicle barrier includes an upper structure forming a vertical passage, opposed legs extending vertically downward from the upper structure, each of the legs having a channel, a bollard disposed in the passage, parallel plates having a vertical section inside of the bollard and a horizontal section positioned outside of a bottom end of the bollard with the horizontal sections located in the channels, a first belt connector attached to and extending normal to the horizontal section, a second belt connector attached to and extending normal to the horizontal section in an opposite direction from the first belt connector, a first belt attached to the first belt connector, the upper structure via a first pulley, and a first counterweight, and a second belt attached to the second belt connector, the upper structure via a second pulley, and a second counterweight.

A bollard device including a frame insertable in a horizontal plane. A base plate is disposed on the frame and has a hole. A movable part is received within the hole and moves vertically between a retracted position, wherein an upper end thereof is flush with the base plate, and an extended position wherein the upper end of the movable part extends beyond the base plate to create an obstacle. The frame includes a plurality of metallic supports defining an underground housing for the movable part and guides by which the movable part slides vertically. Actuating element is housed either in the frame or in the movable part and is configured to permit the vertical movement of the movable part. The movable part includes a stem and a protective tubular member disposed on the stem and constrained thereon by removable coupling element permitting the protective tubular member to be removed.