The disclosure includes a method and apparatus for protecting an air vent pipe. In one or more embodiments, a cover can include a plurality of sidewalls and a pipe portal disclosed through at lease on of the side walls. The distal end of an air vent pipe can be disposed through the pipe portal and into the internal volume of the cover. A clamp can secure the cover to the air vent pipe. An access door disposed in a side wall can give access to the clamp and distal end of the air vent pipe and closing and locking the access door with a locking mechanism can prevent unauthorized users from accessing the distal end of the air vent pipe.

A closure is provided for a pressure vessel or pipelines that can provide quick and easy access to the interior of a pressure vessel or pipeline, and means for a pressure tight seal between the hub and door. The closure can incorporate means for mechanically fastening the door to the hub using an external split clamp ring actuated by a toggle mechanism. A locking mechanism can be provided to safeguard against unintended closure actuation, and provides a layer of redundancy to the holding characteristics of the toggle mechanism. The locking mechanism can be interlocked to a pressure alert system to ensure any differential pressure condition contained within the closure is detected prior to disengaging the locking mechanism and actuating the toggle mechanism.

A closure is provided for a pressure vessel or pipelines that can provide quick and easy access to the interior of a pressure vessel or pipeline, and means for a pressure tight seal between the hub and door. The closure can incorporate means for mechanically fastening the door to the hub using an external split clamp ring actuated by a toggle mechanism. A locking mechanism can be provided to safeguard against unintended closure actuation, and provides a layer of redundancy to the holding characteristics of the toggle mechanism. The locking mechanism can be interlocked to a pressure alert system to ensure any differential pressure condition contained within the closure is detected prior to disengaging the locking mechanism and actuating the toggle mechanism.

A stop to barricade a door from forced entry. The stop includes an upper portion designed to contact the door to barricade it against forced entry, and a lower portion that fits within a receptacle that is recessed into the floor. The stop can be removed from the receptacle when the user doesn't desire to barricade the door. When the stop is placed in the receptacle, the stop is preferably configurable by the user in two modes: a first that allows the user to slightly open the door by a gap, and a second that barricades the door when it is shut. Barricading the door in this second mode is beneficial because it allows the user to look through the gap to verify the identity of a person on the outside of the door, and/or to receive an item through the gap while not opening the door completely.

A door security apparatus includes a storage container including a slot, a door-locking member and a sensor assembly. The door-locking member is removably disposed within the slot of the storage container. The sensor assembly is associated with the door-locking member. The sensor assembly is configured to detect removal of the door-locking member from the slot of the storage container.

Implementations of detachable window systems may include: a main panel including one or more windows therein, the one or more windows in the main panel each having a window casing, a screen, and a window opening mechanism; an upper panel hingedly coupled to an upper side of the main panel; and a lower panel hingedly coupled to a lower side of the main panel opposing the upper side. The window opening mechanism on each of the one or more windows may be used to open the window to permit air to flow through the screen.

The invention relates to a door assembly (1) for a sealed enclosure, said enclosure comprising a wall having a wall portion (20) defining at least one passage opening therein, said door assembly (1) comprising a flange (3) intended for being attached to the wall portion (20), characterized in that the flange (3) comprises two flange elements (3a, 3b) assembled together, one of the flange elements (3a) defining a ring inside the enclosure, the other flange element (3b) defining a ring outside the enclosure, and means for clamping at least one of the two flange elements (3a, 3b) against the wall portion (20).

The invention relates to a door assembly (1) for a sealed enclosure, said enclosure comprising a wall having a wall portion (20) defining at least one passage opening therein, said door assembly (1) comprising a flange (3) intended for being attached to the wall portion (20), characterized in that the flange (3) comprises two flange elements (3a, 3b) assembled together, one of the flange elements (3a) defining a ring inside the enclosure, the other flange element (3b) defining a ring outside the enclosure, and means for clamping at least one of the two flange elements (3a, 3b) against the wall portion (20).

A profile learning system for cooperative control of a dual actuator applied to opposite sliding doors may include a first position sensor configured to detect a position of a door that operates in a first direction along a rail; a spindle assembly including a spindle that operates in a second direction with respect to the door to prevent the door from rattling; first and second motors engaged to the door and the spindle assembly and configured to provide driving power to the door and the spindle assembly, respectively; a memory unit configured to store the position of the door; and a control unit configured to adjust an output of the second motor configured for a predetermined time period and to determine learning success or learning failure for complete opening or closing of the door based on the position of the door when a stall state is detected due to a difference in stroke between the first motor and the second motor.

The present invention discloses a door bracket assembly in a locked and unlocked position according to a door situation of the either being closed or open. The door bracket includes a locking assembly to perform a locking mechanism with a pair of locking elements. The pair of locking elements is in a first position, where the locking mechanism is disengaged and the door bracket is unlocked. In a second position, where the locking mechanism is engaged and the sliding door latch is locked.