A fabric fire rated door is described. The door utilizes a fire resistant fabric curtain with an end lock attachment. A tubular steel shaft is driven by an internal tube motor. The shaft is supported to minimize deflection. Single door shafts can also be joined together with a coupler shaft to create infinitely wide doors. The coupler shaft is spring loaded to act as a take up reel for a coupling curtain which will overlap each adjacent single door shaft. All curtains are attached to the same bottom bar. A hood covers the shaft, curtain, and the supports that run across the width of the door. The curtain travels over these horizontal supports as it drops down through the hood opening. The horizontal supports keep the curtain in position for proper seal during a fire/smoke event.

A fire or smoke barrier (1) having a head box (2) for housing a curtain (4) which is open at its underside to allow the curtain to be deployed and withdrawn. The head box (2) houses a roller (3) for the curtain (4) to be rolled from for deployment and rolled back onto for withdrawal and attached at the bottom of the curtain (4) is a bottom bar (7) for weighing down the curtain (4) when deployed. The head box (2) has one or more apertures (14, 15) for cleaning air circulation and being provided at the, or each, aperture (14,15) with a spring (22) loaded trap (16,17) normally held open by a fusible link (31), the link fusing (31) in event of fire.

An air replenishing fume hood includes a cabinet, a door set, an air replenishing unit and air guiding unit. The cabinet has an inner casing defining an operating chamber and having an air inlet and an air outlet. A side of the cabinet includes an operation window. A first air passage is formed between the inner casing and the cabinet. The door set includes an outer door leaf adapted to open or close the operation window, and an inner door leaf adapted to open or close the air inlet. An end of the air replenishing unit extends into an external space via an outdoor tube, and another end of the air replenishing unit is connected to the first air passage via an extension tube. The air guiding unit includes an end connected to the air outlet, and another end extending into the external space or a collection tank.

A double-walled battery charging cabinet can include: an outer cabinet wall; an inner cabinet wall spaced apart from the outer cabinet wall to form an insulating air gap between the inner cabinet wall and the outer cabinet wall, the inner cabinet wall defining an interior volume; and an air convection port disposed through the outer cabinet wall and the inner cabinet wall. The double-walled battery charging cabinet can further include: a flame arrestor positioned inside or adjacent to the air convection port; a damper positioned adjacent to the air convection port, the damper being biased toward a closed position; a fusible link to hold the damper in an open position, the fusible link having a predetermined melting point at which the damper is released to slide horizontally from the open position to the closed position; and a power outlet disposed inside the interior volume.

A double-walled battery charging cabinet can include: an outer cabinet wall; an inner cabinet wall spaced apart from the outer cabinet wall to form an insulating air gap between the inner cabinet wall and the outer cabinet wall, the inner cabinet wall defining an interior volume; and an air convection port disposed through the outer cabinet wall and the inner cabinet wall. The double-walled battery charging cabinet can further include: a flame arrestor positioned inside or adjacent to the air convection port; a damper positioned adjacent to the air convection port, the damper being biased toward a closed position; a fusible link to hold the damper in an open position, the fusible link having a predetermined melting point at which the damper is released to slide horizontally from the open position to the closed position; and a power outlet disposed inside the interior volume.

A fire damper for a ventilating fan includes a shutter and a frame provided with a flange. An opening is defined through the flange. The frame is further provided with a movable component for opening or closing the preformed opening.

A transport conveyor includes an upstream conveyor section, a downstream conveyor section, and a relay conveyor section having an orientation changeable between a connecting orientation, in which the relay conveyor section in a gap region to connect the upstream conveyor section to the downstream conveyor section, and an open orientation, in which the relay conveyor section is in a non-overlapping region that does not overlap a movement path to open the gap region. A support axis is above a drive axis, and a link mechanism is configured such that when the relay conveyor section is in the connecting orientation, a first pivot axis is below a reference virtual plane connecting the drive axis to a second pivot axis.

A transport conveyor includes an upstream conveyor section, a downstream conveyor section, and a relay conveyor section having an orientation changeable between a connecting orientation, in which the relay conveyor section in a gap region to connect the upstream conveyor section to the downstream conveyor section, and an open orientation, in which the relay conveyor section is in a non-overlapping region that does not overlap a movement path to open the gap region. A support axis is above a drive axis, and a link mechanism is configured such that when the relay conveyor section is in the connecting orientation, a first pivot axis is below a reference virtual plane connecting the drive axis to a second pivot axis.

A system that deploys attic vent covers when there is the immediate threat of fire, as well as methods and device relating thereto, is disclosed. This system includes varied cover types and deployment methods to utilize with a range of attic vents found suitable for use in residential and commercial construction.

A system that deploys attic vent covers when there is the immediate threat of fire, as well as methods and device relating thereto, is disclosed. This system includes varied cover types and deployment methods to utilize with a range of attic vents found suitable for use in residential and commercial construction.