A sliding window to close off an open surface in a wall separating the inside from the outside. The window includes an opening panel, a frame and a passive acoustic silencer. The silencer includes two parallel and acoustically absorbent slides extending in a median plane normal to the open surface. One slide is attached to the opening panel and the other slide is attached to the frame. The movement of the opening panel relative to the frame creating, between the slides, a slit having a thickness equal to the window opening. Also, a system of windows to acoustically damp between the inside and outside of an open space in a wall.

An energy-saving security composite window comprising a peripheral side frame and glass installed on the side frame, in which the side frame is of composite structure. A rectangular high strength metal pipe is located centrally to serve as a main body of the side frame and a cavity of the rectangular high-strength metal pipe is filled with a filling material. A plurality of non-metal profiles are respectively fixed on an outer surface of the rectangular high-strength metal pipe, and an installation groove for installing glass is formed between the rectangular high strength metal pipe and the non-metal profile. An external profile is a metal alloy material, a wooden material, a plastic material, or a glass material fixed on an outer surface of the non-metal profile. The performances of external windows of buildings, such as heat insulation, heat preservation, energy saving, sound insulation, and wind pressure resistance, is improved.

The invention provides a glass door apparatus with a right and a left glass door leaf (10, 100) and functional end caps (40a, 40b, 240a, 240b), which respectively have a protrusion (52a, 52b, 252a, 252b), which, with respect to a lateral front face of the functional end cap protrudes laterally outwards in a manner at least substantially parallel to a pane face of a glass pane of one glass door leaf as well as away from said glass pane, and/or a cavity (54a, 54b, 254a, 254b) which, with respect to said lateral front face, protrudes laterally inwards in a manner is at least substantially parallel to said pane face and towards said glass pane and which, in the opposite direction, opens laterally outwardly, and wherein, in the closed state of glass door apparatus, the protrusion and/or the cavity is/are overlapped with a complementary counterpiece of the other glass door leaf.

The invention provides a glass door apparatus with a right and a left glass door leaf (10, 100) and functional end caps (40a, 40b, 240a, 240b), which respectively have a protrusion (52a, 52b, 252a, 252b), which, with respect to a lateral front face of the functional end cap protrudes laterally outwards in a manner at least substantially parallel to a pane face of a glass pane of one glass door leaf as well as away from said glass pane, and/or a cavity (54a, 54b, 254a, 254b) which, with respect to said lateral front face, protrudes laterally inwards in a manner is at least substantially parallel to said pane face and towards said glass pane and which, in the opposite direction, opens laterally outwardly, and wherein, in the closed state of glass door apparatus, the protrusion and/or the cavity is/are overlapped with a complementary counterpiece of the other glass door leaf.

A sound damping door system having a door frame, a compression seal, a door slab, a bottom seal, and a concealed hinge assembly. The door frame includes male and female components adapted to engage each other in a rough door opening between first and second wall faces; and at least one isolation gasket adapted to be disposed between the male and female components. The compression seal is mounted to the door frame. The door slab includes an outer skin; an arched constrainment sheet inside the outer skin; a damping fill material inside the outer skin; and an acoustic insert inside the outer skin. The bottom seal is mounted to a bottom surface of the door slab such that the bottom seal is permitted to move relative to the door slab.

A sound damping door system having a door frame, a compression seal, a door slab, a bottom seal, and a concealed hinge assembly. The door frame includes male and female components adapted to engage each other in a rough door opening between first and second wall faces; and at least one isolation gasket adapted to be disposed between the male and female components. The compression seal is mounted to the door frame. The door slab includes an outer skin; an arched constrainment sheet inside the outer skin; a damping fill material inside the outer skin; and an acoustic insert inside the outer skin. The bottom seal is mounted to a bottom surface of the door slab such that the bottom seal is permitted to move relative to the door slab.

Described herein is an acoustic structural panel having a first exposed major surface opposite a second exposed major surface and side surfaces extending between the first and second exposed major surfaces, the acoustic structural panel comprising a first protective layer comprising at least a portion of the first exposed major surface, a second protective layer comprising at least a portion of the second exposed surface, a core structure located between the first and second protective layers, the core structure comprising, a foam body; and a fibrous body, wherein the first major exposed surface of the acoustic structural panel comprises a plurality of apertures exposing the fibrous body.

Disclosed is a sliding door or window. The sliding door or window includes a door/window frame, a swing fastening mechanism is disposed at a lower end of a side of the door/window frame, and a locking structure is mounted on an upper end of the side of the door/window frame. The swing fastening mechanism and the locking structure are each provided with a snakelike groove inside which a shaft operative to slide along a groove orientation is arranged. A handle disposed on the door/window frame is operative to drive the shaft to slide in the snakelike groove, thereby forcing the swing fastening mechanism or/and the locking structure to swing.

A sound proofing window system for use with an acoustic door is disclosed. The system includes 2 fully decoupled acoustic reveal formed between 2 acoustic windows, thereby providing a higher level of sound proofing than is achievable with existing art. A decoupled acoustic reveal means that there is no path of contact between the two acoustic windows that is unbroken by soundproofing material. Further, the acoustic windows may be positioned fully or partially outside the thickness of the door to increase the air gap. Prior art systems may attempt to partially decouple the acoustic reveal. A windowed standard 1.75 inch acoustic door according to the present invention provides an STC rating of 56-57, which is far superior to the 35-47 STC rating comparable prior art. The STC rating of the present invention on a 5 inch thick door is estimated at 64 compared to 54 using conventional technology.

A sound proofing window system for use with an acoustic door is disclosed. The system includes 2 fully decoupled acoustic reveal formed between 2 acoustic windows, thereby providing a higher level of sound proofing than is achievable with existing art. A decoupled acoustic reveal means that there is no path of contact between the two acoustic windows that is unbroken by soundproofing material. Further, the acoustic windows may be positioned fully or partially outside the thickness of the door to increase the air gap. Prior art systems may attempt to partially decouple the acoustic reveal. A windowed standard 1.75 inch acoustic door according to the present invention provides an STC rating of 56-57, which is far superior to the 35-47 STC rating comparable prior art. The STC rating of the present invention on a 5 inch thick door is estimated at 64 compared to 54 using conventional technology.