The present subject matter provides a gate for controlling passage of vehicles including: at least one first blocking element configured to swivel about a first pivot axis; and at least one second blocking element configured to swivel about a second pivot axis, wherein the first blocking element and the second blocking element are configured to swivel one opposite the other in a manner that a gap is formed between the first blocking element and the second blocking element, wherein the gap is set to allow or block passage of vehicles through the gap. Additional embodiments of the gate are disclosed herein.

A gate comprises a spring-loaded hinge arrangement defining a rotational axis. A gate structure having a first support arm connected to a first end of the hinge arrangement is also provided. The gate structure is rotatable about the rotational axis. A spring-loaded hinge arrangement includes an outer hinge tube fixedly connectable to an adjacent structure and an inner hinge tube received in the outer hinge tube. The inner hinge tube has a first portion and a second portion movable with respect to each other, the second portion of the inner hinge tube being fixed with respect to the outer hinge tube and the first portion of the inner hinge tube being fixed with respect to the support arm.

A gate comprises a spring-loaded hinge arrangement defining a rotational axis. A gate structure having a first support arm connected to a first end of the hinge arrangement is also provided. The gate structure is rotatable about the rotational axis. A spring-loaded hinge arrangement includes an outer hinge tube fixedly connectable to an adjacent structure and an inner hinge tube received in the outer hinge tube. The inner hinge tube has a first portion and a second portion movable with respect to each other, the second portion of the inner hinge tube being fixed with respect to the outer hinge tube and the first portion of the inner hinge tube being fixed with respect to the support arm.

A retractable fence assembly includes a plurality of lifting units. Each of the lifting units is sunk into a support surface. Each of the lifting units is selectively positioned in a deployed position to extend upwardly from the support surface. Each of the lifting units is selectively positioned in a stored position to be stored beneath the support surface. A fencing unit is operationally coupled to each of the lifting units. Each of the lifting units selectively positions the fencing unit in the deployed position to surround an area. Each of the lifting units selectively positions the fencing unit in the stored position. Thus, the fencing unit is positioned in a trench in the support surface thereby facilitating the fencing unit to be concealed.

A retractable fence assembly includes a plurality of lifting units. Each of the lifting units is sunk into a support surface. Each of the lifting units is selectively positioned in a deployed position to extend upwardly from the support surface. Each of the lifting units is selectively positioned in a stored position to be stored beneath the support surface. A fencing unit is operationally coupled to each of the lifting units. Each of the lifting units selectively positions the fencing unit in the deployed position to surround an area. Each of the lifting units selectively positions the fencing unit in the stored position. Thus, the fencing unit is positioned in a trench in the support surface thereby facilitating the fencing unit to be concealed.

A wildlife access fence or gate may include at least one pass-through section having a guard attached thereto. The pass-through section may be a jump-through section and a jump guard attached thereto that defines a jump height and jump span that selectively allows wildlife to leap over and/or through the fence while preventing cattle from crossing the fence. The fence or gate may include a crawl-through section and a crawl guard that selectively allows wildlife to crawl under and/or through the fence while preventing cattle from crossing the fence.

A wildlife access fence or gate may include at least one pass-through section having a guard attached thereto. The pass-through section may be a jump-through section and a jump guard attached thereto that defines a jump height and jump span that selectively allows wildlife to leap over and/or through the fence while preventing cattle from crossing the fence. The fence or gate may include a crawl-through section and a crawl guard that selectively allows wildlife to crawl under and/or through the fence while preventing cattle from crossing the fence.

There is provided a barrier and a method of opening and closing a barrier. The barrier including a first arm moveable about a first support, a second arm moveable about a second support and at least one coupling. The first and second supports are spaced across an opening and the barrier is arranged between an open and closed position, such that in the closed position, the arms are arranged in combination to traverse the opening. The barrier is further arranged in a locked position, such that the coupling is slidably coupled to the first and second arms. The barrier improves the safety of loading bay areas in order to allow the efficient transfer of goods on freight transportation vehicles.

A system for maintaining thermal separation between first and second adjacent rooms or spaces. The system includes a vestibule with at least a first compartment, and other embodiments may include two or more compartments, such that the vestibule provides a passageway between the first and second rooms. At least one blower draws air from the first room through an air intake, and back into the first room through an exhaust. The system further includes an exhaust port from the first compartment in fluid communication with the exhaust, to exhaust air from the first compartment into the first room. During operation, a vacuum is formed within the first compartment that provides thermal separation between the first and second adjacent rooms.

A screenlet comprising a frame; a flexible flap secured on one edge thereof to the frame; and an arrangement for securing the frame over an aperture in a screen or window. In a specific embodiment, the flap is made of a flexible material (e.g. rubber) designed to cover the aperture when the screenlet is in use. The aperture allows for a power cord or hose to be passed through the screen when the screenlet is in an open position and for the screen to be secured against insects and other pests when the screenlet is in use or closed. Several arrangements are disclosed for securing the flap to the frame including fastener, hook and loop, magnetic and adhesive embodiments.