The present application refers to a closing system for through openings, comprising a quick opening door provided with a vertically moveable flexible panel, running between a pair of vertical guides and being attached by its upper end to a motor driven drum for its actuation, the system having in combination with the quick opening door a fire door mounted with capacity to move between an opening position and closing position, being the quick opening door and the fire door arranged for its alternate actuation.

A sliding door assembly for incorporation within a wall, the assembly comprising a sliding door panel, a top rail guide and a bottom rail guide operatively associated with respective top and bottom ends of the sliding door panel to guide the same within a pair of cooperating guide tracks provided within each of the top rail guides and bottom rail guides, the top and bottom rails guides are not vertically interconnected whereby the pairs of cooperating guide tracks extend in a separate plane from that of the wall so that when the sliding door panel is fully opened it is disposed behind the wall. The invention includes a guide track that is bifurcated to provide multiple sliding door panels.

A personnel access door assembly of an opposing wing of a mine ventilation door. The personnel access door includes a frame including a top portion, a bottom portion, a first post portion and a second post portion, the top frame portion and the bottom frame portion coupled to respective top and bottom ends of the first post and second post portions. The personnel access door further includes sets of trolley wheels affixed to the top or bottom of the frame to engage a top rail or bottom rail affixed on the opposing wing.

A door assembly for selectively interlocking opposing doors each pivotably mounted at a hinge side thereof to a door frame so as to both open and close in the same direction includes a door handle assembly mounted to one door at a latch side thereof opposite the hinge side and carrying a first plurality of magnets, and another door handle assembly mounted to the other door at a latch side thereof opposite the hinge side and carrying a second plurality of magnets. The door handle assemblies are arranged relative to each other with the first and second pluralities of magnets aligned such each aligned pair of the first and second pluralities of magnets have opposite magnetic polarities, and the aligned first and second pluralities of magnets magnetically couple to each other as the door handle assemblies are brought into contact with each other.

A door arrangement including a door frame profile that defines an opening in a passageway. The door arrangement includes at least one door which is openable in opposite directions of the passageway, and which at least one door is suspended with one or more hinges from the door frame profile. The one or more hinges are mounted on the door frame profile outside the opening in the passageway.

A door assembly may include a first sidelite configured to be operably coupled to a first doorjamb, a second sidelite configured to be operably coupled to a second door jamb where the first and second sidelites are disposed in a common plane and define a door opening between the first and second sidelites, a first sliding panel, a second sliding panel where the first and second sliding panels are movable from a closed position disposing the first and second sliding panels to block access through the door opening and an open position in which the first sliding panel is proximate the first sidelite and the second sliding panel is proximate the second sidelite, a first partial door panel, and a second partial door panel. The first and second sliding panels are disposed in a second plane parallel to the common plane in both the open and closed position. The first and second partial door panels are operably coupled to the first and second sidelites, respectively, via hinge assemblies. The first and second partial door panels have a closed state in which the first and second partial door panels are each disposed in the common plane blocking access through the door opening, and an open state in which the first and second partial door panels are each disposed out of the common plane.

Embodiments of this application provide a testing apparatus, configured to test a battery and including a test body and a first door body. The test body may include an accommodating cavity for accommodating the battery, and an opening. The opening may communicate with the accommodating cavity, and the first door body may be connected to the opening and capable of moving relative to the opening. The first door body may have a first state and a second state; in the first state, the first door body may block a part of the opening; and in the second state, the first door body may seal the opening.