Fire can spread extremely quickly within structures. To prevent this, fire doors or fire shutters are usually installed. However, security aspects of such doors or shutters are not renown. An attempt to alleviate this problem may be provided by an insulated fire panel shutter including a guide, adapted to receive a shutter and having one or more retractable members moveable between a retracted and extended position; a shutter, moveable between an open and closed position and formed from a plurality of panels each of which is moveable between a stowed and deployed position; their arrangement being such that as the guide receives the shutter during shutter closure, the panel arrangement alters from a stowed side by side relationship to a deployed stacked end to end relationship.

A cupboard has a body and an up-down louvered door. The door comprises a plurality of louvers, and a pair of lift racks to which the louvers are attached. The cupboard also includes a motor transmission apparatus, and two belts. When people need to open the door, the motor is actuated, whereby the lift racks lift and fold up, causing the louvers to fold up, and thus the door is opened. When people need to close the door, the motor is reversed, such that lift racks descend and extend, causing the louvers to extend, and thus the door is closed. The door can open adequately so as to facilitate taking out/putting in articles. No more space is occupied while opening the door, and the door is safe while closing. A small driving force can open/close the door.

A cupboard has an up-down louvered door. Wherein the door comprises a plurality of louvers, and a lift rack in which the louvers are configured. When people need to open the door, the lift rack lifts and folds up, causing the louvers to fold up, and thus the door is opened; and when people need to close the door, the lift rack descends and extends, causing the louvers to extend, and thus the door is closed. The door can open adequately so as to facilitate taking out/putting in articles. No more space is occupied while opening the door, and the door is safe when closing. A small driving force can open/close the door, and the cupboard features easy operation, long lifetime, low cost and good stability.

A hatch cover is provided for a hatch of a nacelle for a wind driven power plant. The hatch cover includes several segments configured to remain within a hatch opening when a hatch is in an open position.

A nut stacking mechanism (-1-) for the displacement of slats between a stacking zone (L2) and a sliding zone (L1), comprising a spindle (2), on which a nut (3) is displaceable between the stacking zone (L2) and the sliding zone (L1), a rotation stop element (4), to form in the sliding zone (L1), in the rotational direction of the spindle (2), an obstacle for the movement of the nut (3), and a stacking element (5), to form in the stacking zone (L2), in the longitudinal direction of the spindle (2), an obstacle for the movement of the nut (3), wherein, by displacement of at least a part of the rotation stop element (4) and the stacking element (5), the boundary between the stacking zone (L2) and the sliding zone (L1) is provided displaceably in the longitudinal direction of the spindle (2).

A barrier latch assembly having a housing including a first locking element, a second locking element, a trigger and a swing plate. The swing plate is coupled to the trigger and to the first and second locking elements. When the trigger is depressed, the swing plate pivots from an unlock position to a lock position over a rear side of the first and second locking element thereby blocking and preventing the first and second locking elements from being depressed inward.

A sectional door comprising a plurality of panels which can be stacked on top of each other in a stacked state, and next to each other in a stored state; a drive system with a cable or chain for moving the bottom panel in the height direction; upright rails for guiding the panels in the stacked state; means for guiding the panels in the stored state comprising a worm wheel with helical groove for guiding the panels in the storage room; wherein the drive system further comprises a lifting mechanism for removing the upper panel from the stack, and for transferring it to the storage zone.

A foldable structure for a sunshade, a shutter or a fence, comprising at least one guiding member (10); a plurality of displaceable elements (20) slidably connected to said guiding member (10) forming a row (2), a stroke end (54), a first actuator (31) connected to fist displaceable element (20) of the row (2), foldable spacers (40) connecting each pair of successive displaceable elements (20), and a spacer guide (50) including successive first portion (51), second portion (52), third portion (53), wherein the second portion (52) urge the foldable spacers (40) from a first folding position to a second folding position; and wherein a second actuator (32) produces a relative movement between the second portion (52) of the spacer guide (50) and the stroke end (54) to adjust the longitude of the third portion (53), said second actuator (32) being in coordination with the first actuator (31).

A door assembly for a shelter, wherein the shelter comprises a frame assembly and a cover for covering the frame assembly, wherein the door assembly includes a door frame; a door coupled to the door frame, wherein the door is preferably of a flexible material that can be lifted to provide an opening into the shelter and can be lowered for enclosing the shelter, wherein the door includes a plurality of pockets; a plurality of elongated door members, each of which includes a first and a second end, wherein each of the plurality of elongated door members is positioned within a respective one of the pockets; a plurality of first couplers, each of which couples the first end of a respective elongated door member to a first side of the door frame; a plurality of second couplers, each of which couples the second end of a respective elongated door member to a second side of the door frame; and a door lifting/lowering assembly for lifting the door to provide the opening into the shelter and for lowering the door for enclosing the shelter. Also disclosed herein is a shelter comprising a frame assembly and a cover for covering the frame assembly; and a door assembly as disclosed above.

The invention refers to a retractable a retractable modular partition wall that may be used to partition residential spaces, or it may operate as a garage door that is mounted on two parallel walls of a premises and consists (FIG. 1.1) of an assembled left-side runway. A, that is fastened with the aid of the some known fastening elements, such as dowels and screws, on the conventionally left wall of the premises, an assembled right-side runway, B, mirroring the left-side runway, A, and which is fastened with some known fastening elements, such as dowels and screws, on the conventionally right-side wall of the premises, a drive mechanism. C, and several assembled movable panels, D. The retractable modular partition wall is conceived so that: i) when used inside or outside a building, in retracted state, it looks like a horizontal beam, whereas in expanded state it operates as a wall; ii) when used outside a building, in retracted state it looks like a horizontal beam, whereas in expanded state, it operates as a garage door; iii) it is operated through electronic command and, in case of power failure, it can be driven manually; iv) when used in a premises, whether inside or outside a building, in expanded state, it can operate as a projection screen or an advertising surface.