A shade adapted for covering a classroom viewing window and assisting with compliance with emergency protocol during an emergency is disclosed. The shade may include a plurality folds connected to each other by a plurality of hinges configured to cover a classroom viewing window. Emergency related information and status indicators may be revealed upon the unfolding of the shade to assist teachers, school officials, police, and others to comply with established school emergency protocol. The shade further fulfills the requirement that the classroom viewing window be covered during an emergency lockdown. The shade may function as a standard “Exit” sign during non-emergency time. Another shade may include a case holding a material portion with handles that enable the shade to be moved up and down.

A device for reducing impact forces upon a surface includes a base comprising a first contact portion and a transition portion, a contact member disposed between the base and the surface; and a biasing portion disposed between the first contact portion of the base and the surface. At least a first portion of an impact force upon the surface is transferred from the contact member to the base, and a second portion of the impact force is subsequently returned to the surface, the second portion being less than the first portion.

A refrigerator including: a main body forming a storage compartment and a door provided to open and close the storage compartment, wherein the door includes a door frame, a cover arranged in front of the door frame and including a cover fixer, and a door panel arranged in front of the cover, the door panel including a first fixer and a second fixer on a rear surface of the door panel. When the door panel is coupled to a front side of the cover, the first fixer is coupled to the door frame and the second fixer is coupled to the cover.

Blast, ballistic, and entry resistant operable window systems include a sliding exterior glazing panel assembly, a sliding interior glazing panel assembly, an exterior frame assembly that receives the sliding exterior glazing panel assembly, an interior frame assembly that receives the sliding interior glazing panel assembly, an exterior gasket for placement between the exterior frame assembly and the wall of the building, a central gasket for placement between the exterior frame assembly and the interior frame assembly, and an interior gasket for placement between the interior frame assembly and the wall of the building. Methods of installation in a wall of a building are also provided.

Blast, ballistic, and entry resistant operable window systems include a sliding exterior glazing panel assembly, a sliding interior glazing panel assembly, an exterior frame assembly that receives the sliding exterior glazing panel assembly, an interior frame assembly that receives the sliding interior glazing panel assembly, an exterior gasket for placement between the exterior frame assembly and the wall of the building, a central gasket for placement between the exterior frame assembly and the interior frame assembly, and an interior gasket for placement between the interior frame assembly and the wall of the building. Methods of installation in a wall of a building are also provided.

A folding door structure is provided. The folding door structure includes an upright column, upper sliding bracket and a lower sliding bracket. The upright column is hinged to the door leaves. The folding door structure further includes a first lock component. The first lock component includes a first latch mounted inside the upright column, and both ends of which are extended out from the top and bottom of the upright column to insert into the upper slide and/or the lower slide. By providing a first lock component and an upright column, a first latch can lock the position of the upright column relative to a door frame in a direction of wind pressure. Accordingly, the stress environment of the upper sliding bracket and the lower sliding bracket is improved, and the reliability and the resistance to high wind pressure of the connection mounting structure between adjacent door leaves are improved.

A window device comprising: a window, window frame, a window holder element, to which the window is attached along a periphery of the window, a window-motion dampening element, and a coupling device via which the window holder element is in engagement with the window frame. The coupling device comprises a projection and a guide recess and is arranged at the inner periphery of the window frame and, from a normal operation position of window, it allows motion of the window holder element in a first direction in which the window holder element is arranged to compress and deform the dampening element, but prevents the window holder element from moving in an opposite second direction.

A window device comprising: a window, window frame, a window holder element, to which the window is attached along a periphery of the window, a window-motion dampening element, and a coupling device via which the window holder element is in engagement with the window frame. The coupling device comprises a projection and a guide recess and is arranged at the inner periphery of the window frame and, from a normal operation position of window, it allows motion of the window holder element in a first direction in which the window holder element is arranged to compress and deform the dampening element, but prevents the window holder element from moving in an opposite second direction.

A snubber includes an engagement portion with a free end configured to be removably engaged within a groove in a frame. The engagement portion includes a first engagement member and a second engagement member at least partially separated from the first engagement member. The second engagement member deflecting less than the first engagement member when a negative pressure is applied to the sash.

A blast-protected window, including a sash including a glass plate surrounded by a first frame, and being carried by a second frame being fixed to an opening of a structure, and a third frame, being fixed to the structure opening, and including a first peripheral surface shaped for closely covering the room side of the second frame, and being configured to block, thereby blast directed from the external environment onto the glass plate knocks onto the first peripheral surface of the third frame disposed close thereto and being configured to block the blast.