Abstract: The pool safety net system incorporates an adjustable flooring in a pool structure. The adjustable flooring installs in the pool structure. The adjustable flooring forms a horizontal surface that supports objects that sink into the pool structure. The adjustable flooring is adjustable such that the depth that an object sinks into the pool structure is adjustable. The pool safety net system further comprises a control circuit. The control circuit controls the adjustment of the adjustable flooring. The control circuit is remotely controlled.

Abstract: A cattle guard assembly includes a cattle guard that is positionable in a depression in a roadway extending along a fence line. In this way the cattle guard inhibits livestock from crossing the fence line in the roadway. The cattle guard is comprised of a resiliently compressible material thereby resisting impact damage. Additionally, the cattle guard is comprised of a non-oxidizing material to resist corrosion. The cattle guard comprises a plurality of modular units thereby facilitating the cattle guard to have a selectable width for accommodating a variety of roadway widths. Each of the modular units is comprised of a molded, unitary structure such that said modular units resist breaking. Each of the modular units includes a base and a grate, and the grate is positionable in an existing cattle guard base for replacing an existing grate in an existing cattle guard.

Abstract: Some implementations of the disclosure are directed to automatically rotating displays to display media content based on metadata extracted from the media content that provides an indication of a target display orientation to display the media content. In one implementation, a method includes: detecting media content for display on a display, wherein the display is mounted on a rotatable display mount; extracting metadata from the detected media content, the extracted metadata providing an indication of a target display orientation to display the media content; using at least the extracted metadata, automatically causing the rotatable display mount to rotate the display to the target orientation; and displaying the media content on the rotated display.

Abstract: An automated rumble strip assembly includes a frame having a top surface configured to support a vehicle tire moving along the frame. The automated rumble strip assembly also includes a plurality of elongate members disposed within the frame, wherein each elongate member includes an elongate member housing, an internal carriage assembly disposed within the elongate member housing and moveable within the elongate member housing, and an actuator assembly coupled to the internal carriage configured to move the internal carriage relative to the elongate member housing.

Abstract: A system including a backfill protector including a skirt having an opening configured to receive a cover therein and a lip extending around a perimeter of the opening. The lip is configured to support the cover thereon, and the skirt further includes an inwardly-extending channel positioned adjacent to the lip.

Abstract: Disclosed is a latching mechanism for a access door. More specifically, the disclosure relates to an access door that can be pivoted between opened and closed orientations and secured in the open position with the aid of a hold open arm. A latching lever, in turn, pivotally engages the hold open arm to selectively secure the access door in an opened orientation. A grip upon the hold open arm can thereafter be used in conjunction with the latching lever to release the access door and permit it to be closed.

Abstract: Tower sections for towers of wind turbines and methods for installing towers of wind turbines are disclosed. A tower includes a preassembled power module having a first cross-sectional area. The tower section includes a wall having an inner surface and an outer surface. The inner surface defines a tower interior and has a first diameter. The tower section further includes a tower flange extending from the wall into the tower interior and having a second diameter less than the first diameter. Further, the tower section includes a platform assembly affixed to the wall and having a third diameter greater than the second diameter. The platform assembly defines an aperture having a second cross-sectional area greater than the first cross-sectional area.

Abstract: An in-ground storm shelter for installation in the floor of a structure. The door is substantially flush with the floor and comprises two panels, one sliding over the other, so as to occupy as little floor space as possible. A spring-biased latch on the leading edge of the sliding door automatically latches the closed door to a rail on the front edge of the enclosure as the door is slid shut. The latch may comprise a pair of handles, each with a grip hole. The latch is releasable from outside the shelter using the end of a handrail that acts on the latch through a latch release window in the sliding door. The shelter may also include a safety chain that extends through the grip holes in the latch handles. A security lock may be included so that the shelter may serve as a safe or secure storage.

Abstract: A cover device for at least partially closing off a cavity includes at least one cover element for closing off the opening of the cavity, and a support structure in the form of an elongate body for supporting and positioning the cover element in or close to the cavity. The cover element is in the form of a pneumatic mattress equipped with return elements for urging it back into a most compact configuration in which it is rolled up about a free one of its sides and forms a spirally wound roll, the free side being formed by the side of the mattress that is opposite from the connecting side of the mattress via which side the mattress is connected to the support structure. This device includes at least one support arm for supporting the mattress while going from its rolled-up most compact configuration to its rolled-out least compact configuration.

Abstract: An energy absorbing system having a stanchion, a linearly extendable energy absorber coupled to the stanchion, a net coupled to the energy absorber, wherein the net transfers force to the energy absorber, and a securing mechanism that maintains tension between the net and the energy absorber until acted upon by tensile forces of at least a minimum threshold force, wherein at least a portion of the system is retractable into the ground.

Abstract: A temporary barricade in the form of a retractable post system. In one configuration, the post is lowered into the ground, such that the top of the post is flush with the ground surface, leaving an unobtrusive configuration that one can walk over, drive over, and so forth. In another configuration, however, the post can be pulled up from the ground, and with a moderate rotational twisting motion, locked into vertical position, thereby providing a strong barrier to traffic and other situations.

Abstract: A pit cover open/close device including a closing limiting stopper for a pit cover which is disposed in a position corresponding to a top of a roller of a chassis dynamometer, guides disposed on a stationary side of the pit in an opposed relation to both side faces of the roller of the chassis dynamometer and extending along a circumferential direction of the roller of the chassis dynamometer, a two-part split pit cover supported by the guides and including two pit cover parts into which the pit cover is split from a portion thereof corresponding to the position of the stopper, the two pit cover parts being movable in an opening direction and a closing direction, respectively, and a cylinder including a movable rod that is connected to one of the two pit cover parts and a body that is connected to the other of the two pit cover parts, the cylinder being driven to allow the two pit cover parts to move along the guides in the opening direction and the closing direction.

Abstract: A heavy duty ground retractable automobile barrier for a railroad crossing. Concrete bunkers are placed at each side of a roadway. An upstanding concrete-filled steel pipe fixed in each bunker has a sleeve for rotational and axial movement. Shock absorbers are mounted on each sleeve. A net extends across the road and is attached to the opposite ends of the shock absorbers. Collision of an automobile with the net creates tensile forces in the net. The shock absorbers expand while rotating about the pipe's axis in response to tensile forces from the net that meet or exceed a minimum threshold. Forces from the net pass through the axis of the steel pipe. The net is stored in a pit transverse the roadway parallel to the railroad tracks and is raised and lowered as appropriate. The net includes a cable that extends across the road in a wave pattern, having peaks, valleys and midpoints, wherein tangents of the wave midpoints are at least 90 degrees from tangents of the peaks and valleys.

Abstract: A manhole cover assembly including a frame defining an opening and a cover sized to engage the opening. A lift pin is retained by the frame, defining a first axis, and includes a bearing portion, and a top end connected to the cover. The lift pin is free to slide axially along the first axis. A spiral cam is retained to the frame by a torque shaft including an upper and lower end, defining a second axis offset from the first axis. The spiral cam includes a cam surface in selective engagement with the bearing portion of the lift pin so that rotation of the torque shaft about the second axis causes rotation of the spiral cam about the second axis and displacement of the lift pin along the first axis.

Abstract: A car-attack defending apparatus includes a pressure-sensitive reaction module, an emergent airbag-inflation module, a crash barrier module, and an integral exterior unit module, wherein the pressure-sensitive reaction module has a pressure-sensitive setting and triggering mechanism, the emergent inflation airbag module has an emergent airbag expansion mechanism, and the crash barrier module has a crash-resistant steel plate. The car-attack defending apparatus can be disposed at entrances of specific buildings or restricted areas, so that at the moment a suspected car ignores warning and attempts to access the site, the emergent airbag expansion mechanism will be triggered, by the weight of the car, so as to expand the airbag simultaneously, and to stretch the crash-resistant steel plate to form a barrier. As such, the suspected car can be prevented from moving further, allowing checkpoint personnel a safe standoff distance from car bombs.

Abstract: The assembly of the mobile swing-gate is installed in the channel that is dug across the entire width of the road, and the sides of the excavation are reinforced by wall (5). The created recess is over-bridged by swing-gate (1). One side of swing-gate (1) is connected onto joint (2) that is fixed onto channel wall (5). The opposite side of swing-gate (1) is supported by support grate (3) that by its upper side leans against swing-gate (1) and by its lower side against the corner of wall (5). Steel rope (4) is attached at the upper side of the support grate. By pulling steel rope (4) the support grate (3) eludes bellow swing-gate (1) that remains without support at that side, rotates about joint (2) and falls into the channel, and in such a way a recess is opened in the road.

Abstract: Anti-break-through safety barrier able to be used in correspondence with a site to be protected. The anti-break-through safety barrier comprises a plurality of modular elements coupled together so as to slide vertically with respect to the other. Each modular element comprises a stiff and armor-plated protecting wall, which is fixed laterally to a pair of supports. Each modular element is further movable between an inactive position, located below a determined trampling reference plane and a lifted position above the trampling reference plane to define a single compact protecting structure, stiff and armor-plated, anchored to the floor or to the ground.

Abstract: A grade level box for use with underground utilities connections having vertical walls reinforced with exterior vertical and horizontal ribs integrally molded with the wall structure.

Abstract: A retractable road median used to divide a road that may be retracted to allow vehicles to cross it in the event of an emergency, comprising a median assembly, a frame assembly, a winch assembly, and a longitudinal base assembly. The retractable road median has means to move the median assembly from a retraced position into an extracted position and vise versa. In the retracted position, a cavity built underneath a road surface, retractably receives the median assembly therein. The longitudinal base assembly includes two angled lateral walls that, in the extracted position, are in a substantially vertical disposition and their longitudinal edges rest on the sidewalls of the median assembly. In the retracted position, the median assembly collapses into the cavity so that the angled lateral walls rotate into a nearly horizontal position to cover the cavity entrance, permitting vehicles to cross to the other side.

Abstract: A pit cover includes a casing, a cross bar and cover plate. The casing has a peripheral wall in the general shape of a rectangle, with open opposite ends and. The cross bar is coupled to and extends across the wall on an inside of the casing. The cover plate is configured to cover the first end of the casing. The cover plate has a first surface which, when the cover plate covers the first end of the casing is located on an outside of the casing. An enclosure is supported on a second opposite side of the cover plate and is provided with a slot through which a part 34 of the cross bar 14 can extend into the enclosure 28. A door 36 is coupled to the cover plate to provide access to the enclosure.

Abstract: A pit cover 10 includes a casing 12, a cross bar 14 and cover plate 16. The casing 12 has a peripheral wall 18 in the general shape of a rectangle, with open opposite ends 20 and 22. The cross bar 14 is coupled to and extends across the wall 18 on an inside 24 of the casing 12. The cover plate 16 is configured to cover the first end 20 of the casing 12. The cover plate 16 has a first surface 26 which, when the cover plate 16 covers the first end 20 of the casing 12 is located on an outside of the casing 12. An enclosure 28 is supported on a second opposite side 30 of the cover plate 16 and is provided with a slot 32 through which a part 34 of the cross bar 14 can extend into the enclosure 28. A door 36 is coupled to the cover plate 16 to provide access to the enclosure 28.

Abstract: A pre-fabricated service bay used for providing service access to the underside of vehicles. The service bay is fabricated as a single monolithic unit and then positioned in an excavated hole within a service building. The service bay has multiple safety cover grids that are hydraulically activated to enclose the bay's opening when not in use. An access stairway is retractable within the bay during use with a deployable safety handrail that collapses upon stairway retraction.

Abstract: A lid lifter mount is installed on the hinge pin of a conventional manway lid, and has a compression spring assembly engaging a lever which is also installed on the hinge pin. The lever has a bar engaging a lid hinge arm. A spring force adjustment screw connected to the mount enables adjustment of the amount of lift assist the bar applies to the hinge arm by cam action against the arm as the operator lifts the lid. Two embodiments are shown for attachment to two types of lid hinges.

Abstract: A pivoting channel like post attached with rivets to a base bolted to the pavement, shaped both from stamped and bent metal sheets with some welding. A rigid metal strut stand has riveted axles on both ends that slide on rails cut into the post and the base. A locking device inside the post also shaped from stamped and bent metal is attached with rivets that slide on rails cut in the post. A pedal like component and a handle are riveted or welded to the post. Pressure fasteners will fit into holes in the post to hold sign. Bent metal strips extending from the post attached with screws will hold sign. Staples welded to post and locking device will hold a padlock. Springs are attached to pins or barbs cut from the metal. A second alternative embodiment has a commercially available lock installed in the post, sliding locking device will engage lock, locking device shape will fit type of lock used.

Abstract: A retractable cover for an opening of an automotive bay pit wherein the retractable cover is formed by movable and stackable panels. The panels are normally positioned adjacent one another. Each panel includes supporting and spanning edges. Positioned on the supporting edges are slide rails. The slide rails are slidable in two horizontal directions in tracks of the automotive bay pit. The ends of the slide rails are inclined, and abutting ends of the slide rails of adjacent panels are parallel to one another. Because the abutting ends are parallel, an operator's application of a strictly horizontal force to a panel causes the panel to wedge under or slide over an adjacent panel. Therefore, the operator is not required to apply any vertical lifting force to a panel to create an opening in the cover. The operator may move any panel in the cover and move it in either horizontal direction to create the opening in the cover.

Abstract: A safety fence for a square hatched formed in a slab of a building is provided. The fence has lids pivotable about opposed sides of the hatch, and has such a size that about half of the opening of the hatch is closed by each of the lids. Side frames having a predetermined height are pivotable about opposed sides of the hatch. A plurality of gear mechanisms is provided, with each mechanism comprising a first gear and a second gear in mesh with each other, a first shaft supporting the first gear, a second shaft supporting the second gear, the first and second shafts extending parallel to the opposed ends of the hatch, the first gears being secured to lower ends of the lids, and counterweights mounted to one of the second shafts. The safety fence is set up by erecting the lids and the side frames. A plurality of brackets each having a pair of bracket portions secured to the inner wall of the hatch.

Abstract: A vehicle security gate apparatus and methods are provided for inhibiting undesired access to a protected area. The vehicle security gate apparatus preferably has a barricade adapted to be positioned adjacent a roadway to thereby block vehicle passage along the roadway into an area desired to be protected. The apparatus also preferably has a barricade rotating mount connected to the barricade for rotating the barricade about a predetermined axis so that the barricade rotates about the predetermined axis between a vehicle passage position which allows a desired vehicle to readily pass along the roadway into the protected area, a vehicle blocking position which blocks the roadway so as to inhibit an undesired vehicle from readily entering into the protected area, and a vehicle arresting position which arrests an undesired vehicle responsive to an attempt by the undesired vehicle to ram the barricade when the barricade is positioned in the vehicle blocking position.

Abstract: A floor hatch with a built-in security fence is described, where access to the understructure can only be provided wherein a pair of doors are pivoted outwardly to an open position and secured, forming two opposite sides of the security fence; a first gate is pivoted outwardly to an open position and secured to each of the doors, forming the rear of the security fence and a second gate, leaving a pivoting door, is pivoted outwardly and secured to each of the doors forming the front of the security fence. The pivoting door of the second gate pivots outwardly to permit access to the opening in the floor. The floor hatch may also include a security grate and telescoping extension on each of the doors. The floor hatch can be locked in the closed position and can be opened, automatically forming a security fence, to permit access to an understructure of a floor.

Abstract: There is disclosed a transportable device for non-destructively impeding the motion of a land vehicle travelling along a pathway. First and second telescoping devices located on either side of the pathway support a barrier. When the telescoping supports are compressed, the vehicles pass over the barrier unimpeded. When the telescoping supports are extended, the barrier impedes the motion of a land vehicle. At least one deceleration cable mechanically couples the barrier to a braking system. The braking system applies a continuous deceleration force to the vehicle of typically less than 2 g, bringing the vehicle to a stop without damaging either the vehicle or vehicle occupants.

Abstract: A vehicle barrier for preventing unauthorized entry of a vehicle to a designated area comprises a frame, penetrating means mounted on the frame and engageable into a ground so as to prevent movement of the barrier upon impact by an unauthorized vehicle; means for puncturing tires of an unauthorized vehicle provided on the frame, means arresting the unauthorized vehicle on the frame when the vehicle enters the barrier, and means for allowing the frame to move on a road surface so that the barrier can be installed at the desired location.

Abstract: A stair and stairwell construction for interconnecting two different decks, especially in an aircraft, includes stair treads, stringers, and a stairwell enclosure or housing. At least one of the just enumerated components is constructed to be positionable or tiltable relative to the planes defined by the decks. One of these components is positionable into an open position, thereby providing a passageway, or into a closed position thereby blocking the passageway. In both positions, this positionable component is lockable.

Abstract: A manhole cover comprises a base and a cover. The base has a first inner rim provided with a first bevel while the cover has a second outer rim provided with a second bevel. When the base is joined with the cover, the first bevel of the base and the second bevel of the cover are caused to make contact with each other such that the base is joined with the cover in an airtight and watertight manner. The first bevel of the base and the second bevel of the cover are of such construction that they enable the cover to be lifted easily to set apart from the base.

Abstract: A road barricade can be swiveled upward from its open position parallel to the road surface, in which its U-shaped cross-section overarches the drive mechanism, about a shaft secured to the ground, into barricade position. To this end it has, on the side nearer the ground in the open position, a pair of guide curves, or a pair of rectilinear guide ramps along which a pair of feed rollers move, which are mounted on a threaded muff which slides on a drive spindle. This drive spindle is guided by running wheels on the base plate of the barrier and carries a protective tube which surrounds the spindle. In an approximately vertical position, the common shaft butt ends of the feed rollers and the running wheels engage in curved grooves in the barricade element; the barricade element is swivelled downward in a controlled manner under its own weight by the co-operation of the guide lines with the feed rollers.

Abstract: A transfer pad cover includes a frame structure covered by a water-proof sheet material. The frame structure is supported by bar joists that are mounted for movement along tracks. The entire structure is moved by hand or motor or by a truck from which a liquid transfer will be made to a position adjacent the transfer pad during the transfer operation. When the material and frame structure are sufficiently weighted down so that it is unsafe to move the cover, the joists will rest on a ground surface, preventing movement of the cover. In an alternate embodiment, the rails are sloped and the truck pushes the cover off of the pad. When the truck leaves the pad, the slope of the rails causes the cover to automatically return to protect the pad under the influence of gravity.

Abstract: A system for automatically opening and closing horizontal covers over standard inspection pit. The system comprises two grates mounted on wheels, the wheels engaging two parallel tracks attached to opposite sides of the pit. An electric motor powers the grates upon command to either move away from each other to an open position to expose the pit, or to move toward each other to a closed position to cover the pit. The system is equipped with both audible and visual warning devices which automatically activate upon movement of the grates. Also, the leading edges of the grates have sensors which cause the grates to stop and retract upon detection of a foreign object caught therebetween.

Abstract: An immproved lid assembly for roll-off sludge containers is provided wher the lid assembly is supported by oppositely disposed lip portions which extend longitudinally along each side of an opening formed in an upper side of the sludge container. The lid assembly comprises a plurality of lid members and a roller assembly connected to each of the lid members so that the lid members can be selectively moved between a first position and a second position relative to the opening of the sludge container. In the first position the lid members are telescopically disposed in adjacent lid members, thus providing access to selected portions of the opening in the sludge container. In the second position, the lid members are extended and close off the opening in the sludge container.

Abstract: A movable safety cover for covering an elongated opening in a floor. Has a plurality of deck carriers positioned adjacently and supported on each elongated side of the opening by a respective carrier track. Has track roller members mounted at each end of the side members of a carrier in a position slightly out of contact with the track member when the side members are in frictional contact and engaging the track in rolling relation when one end of the carrier is lifted up slightly from the frictional contact of the tracks. Has a plurality of low profile rolling ball transfer members mounted on top of the side members to permit the carrier to roll across the top of an adjacent carrier.

Abstract: A collapsible road barrier comprises a foundation pit, a frame located in the foundation pit, an expandable barrier element mounted in the frame, at least one energy absorption element extending from a rear wall of the foundation pit to a rear side of the frame, and at least one stretching element connected between the front side of the frame and the front wall of the foundation pit, such that vehicle impact against the barrier element will cause the frame to first move towards the rear wall of the foundation pit, causing the energy absorption element(s) to compress and the stretching element(s) to extend and eventually break, and then pivot upwardly to stop the vehicle.

Abstract: A vehicle barricade comprises a frame to which a barrier plate is pivotally mounted for being moved between a passage and a blocking position. First and second hydraulic motors operably interconnect the plate and the frame. An hydraulic power supply is operably connected with the hydraulic motors and includes an uninterrupted line for assuring constant power supply to the first hydraulic motor for thereby biasing the first hydraulic motor into extension and control valve means for selectively supplying power to the second motor for thereby causing selective pivoting of the plate.

Abstract: A vehicle security barrier (10) for selectively prohibiting a vehicle from accessing a preselected area and for otherwise controlling vehicular traffic. The security barrier (10) comprises a base (12) defining a travelway (14) over which a vehicle can be driven. The base (12) comprises a forward end portion defining an entryway (20) whereby a vehicle enters onto the travelway (14) and a rearward end portion defining a travelway exit (22) whereby a vehicle exits the travelway (14). The security barrier (10) further comprises a security gate 918) pivotally mounted on the base (12) for being selectively raised to obstruct the travelway (14) and prohibit a vehicle from exiting the travelway via the travelway exit (22). Reciprocal actuating means are also provided for selectively raising and lowering the gate (18). In the preferred embodiment, the reciprocal actuating means comprises a first and second fluid actuated cylinder (64A and B).

Abstract: A vehicle barricade comprises a frame having an open top and bottom, side, front and rear portions. A barrier plate is pivotally associated with the frame for being pivoted between a first and a second position. A cylinder and piston assembly pivots the barrier plate between the positions. A first stop extends from and is carried by the barrier plate. A second stop is connected to the frame and is engageable with the first stop for preventing said barrier plate from pivoting beyond said second position. A plurality of tubes extend forwardly from the front portion and prevent the frame from moving in the event the barrier plate is impacted by a vehicle.

Abstract: A barrier system is provided for blocking a roadway to prevent passage of a vehicle. The barrier system comprises a series of inflatable bags connected to a flexible net, and energy dissipating units connected to ends of the net. The system is normally located in a subterranean chamber when deactivated. When activated, the air bags are inflated and rise above the ground surface while pulling the net upwardly therewith. A vehicle which impacts the barrier is rapidly decelerated under the energy dissipating action of the air bags, energy dissipating units, and net.

Abstract: An anti-terrorist vehicle crash barrier includes side support structures, crushable energy absorbing aluminum honeycomb modules, and an elongated impact-resistant beam extending between, and at its opposite ends through vertical guideways defined by, the side support structures. An actuating mechanism supports the beam at its opposite ends for movement between a lowered barrier-withdrawn position in which a traffic-supporting side of the beam is aligned with a traffic-bearing surface permitting vehicular traffic between the side support structures and over the beam, and a raised barrier-imposed position in which the beam is aligned with horizontal guideways defined in the side support structures above the traffic-bearing surface, providing an obstruction to vehicular traffic between the side support structures. The beam is movable rearwardly in the horizontal guideways with its opposite ends disposed transversely therethrough upon being impacted at its forward side by an incoming vehicle.

Abstract: A hydraulic barricade comprising a support to which a barricade plate is pivotally attached. At least a first hydraulic cylinder and piston assembly is operably connected with the barricade plate for pivoting the barricade plate between an up and a down position. A pump supplies pressurized hydraulic fluid to a primary source and a secondary source of pressurized fluid. A directional control valve is interposed between the cylinder and piston assembly and the sources for causing operation of the cylinder and piston assembly and thereby pivoting of the barricade plate. A first check valve is interposed between the sources for permitting pressurized fluid to flow from the pump and the cylinder and piston assembly to the secondary source and for preventing fluid from flowing from the secondary source to the primary source. The secondary source includes an hydraulic accumulator for storing hydraulic fluid under pressure.

Abstract: A vehicle barrier device 10 for the temporary blocking of a roadway 12 comprises blocking elements 20, 22, 24, 25 with joined conter-elements 26, 28, 30, 31. The blocking elements 20, 22, 24, 25 are pivotable around axles extending parallel to the main direction of the roadway 12 and are arranged either in the main flush with the roadway 12 or can be swung out of it. The barrier elements 20, 22, 24, 25 are inserted exchangeably into a frame 132 which is set into a pit 128 present in the roadway 12.

Abstract: A security barrier device comprises a rectangular container defined by sides, ends and a base. A post is mounted in the container for pivotal movement about a transverse pin with a slot in the post allowing linear movement of the post relative to the container. A recess in the base of the container allows the post to be latched in position in a vertical orientation and in addition the post can be stored by sliding out of the recess and then pivoting into a position lying along the container. A cover is provided by a first fixed part adjacent the pin and the second moveable part which is pivoted at the end of the container remote from the post and which is locked into engagement with a side of the post and a lug on the post by a locking mechanism welded to one side of the container.

Abstract: A vehicle security barrier (10) for selectively prohibiting a vehicle from accessing a preselected area and for otherwise controlling vehicular traffic. The security barrier (10) comprises a base (12) defining a travelway (14) over which a vehicle can be driven. The base (12) comprises a forward end portion defining an entryway (20) whereby a vehicle enters onto the travelway (14) and a rearward end portion defining a travelway exit (22) whereby a vehicle exits the travelway (14). The security barrier (10) further comprises a security gate (18) pivotally mounted on the base (12) for being selectively raised to obstruct the travelway (14) and prohibit a vehicle for exiting the travelway via the travelway exit (22). Reciprocal actuating means are also provided for selectively raising and lowering the gate (18). In the preferred embodiment, the reciprocal actuating means comprises a first and second fluid actuated cylinder (64A and B).

Abstract: A security and defense barrier which comprises a vault buried within and transverse to the roadway. The vault has within a latched plurality of barrier arms that may be raised by any powered means, or manually, and the raised barrier arms being positioned within the vault so that impact forces are transmitted directly to the vault, and to a foundation, and little or no load is supported by a pivoting mechanism. Being very strong, the barrier can be made capable of stopping a speeding vehicle. The raised barrier arms have a hook on the end so that a speeding vehicle attacking the barrier will be snagged, and prevented from inadvertently or intentionally vaulting the barrier.

Abstract: A cattle guard has a grid with a plurality of spaced bars lying transverse to the direction of travel across the guard. The bars are supported by a plurality of spaced beams lying beneath the bars. The grid, in turn, is supported by a base in the ground. The base comprises a pair of side members positioned transverse to the direction of travel across the guard. Each of the side members has a side wall with a box-like flange member lying normal to the side wall and extending into the base. The grid rests on the flange member when the cattle guard is assembled and retained in position with respect to the base by locking elements. A plurality of columns extend between upper and lower walls of the flange member to support the grid. The base has a pair of end walls fastened to the side members during installation to complete the construction of the base.

Abstract: A vehicle traffic-way controller of retractile barrier configuration wherein activation and control is by hydraulics in the form of a pressure source applied from a motor driven pump and directed by a valve to opposite ends of a double acting cylinder and piston actuator to extend and retract the barrier, there being switch control with positive positioning of the barrier and with impact absorbing protection for the hydraulics and structure.