A damper providing varying damping force is provided. The damper may include a housing and a rotary member rotatably received the housing. The rotary member may rotate within the housing between defined end points of travel to define an angular range of travel of the rotary member. An outermost surface of the rotary member may be spaced inwardly from an inner surface of the housing defined between the end points of travel to define a gap between the outermost surface of the rotary member and the inner surface of the housing throughout the angular range of travel. The gap may vary in dimension depending on a rotational position of the rotary member to provide varying damping rates within the angular range of travel of the rotary member.

A data centre (10) includes one or more controllable air circulation systems (e.g. air optimiser (11)), one or more cold aisles (15) and/or one or more hot aisles (16), one or more rows of racks (14), the data centre being so arranged that in use cooling air (18) passes, under the control of the one or more controllable air circulation systems, from a cold aisle (15) through the racks (14) and/or through the racks (14) to a hot aisle (16). An access door (20), which provides access to at least one of the aisles, is movable between an open position allowing personnel access to the aisle and a closed position. The door (20) has an aperture (25) in which is provided a controllable air intake arrangement, for example comprising a vent (17) in the form of multiple vertically extending rotatable blades (28). The width (24) of the door is wider than the width (26) of the aisle associated with the door (20), so that the width of the aperture (25) may be larger than or substantially equal to the width (26) of the aisle. Air-flow into the aisle may therefore be subjected to less of a constriction than if the door (20) and aperture (25) were narrower.

A louvre shutter comprising louvres 20 rotatably mounted in a frame on louvre axles, and a louvre drive system that, in summary, comprises a rack and pinion gear system including an externally operable rack assembly and a set of pinion gears 28 mounted to the louvre axles. The rack is externally operable rack and is reciprocably mounted in the drive system housing 42, 48. The pinion gears 28 mounted to the louvre axles are engaged with the rack such that reciprocation of the rack rotates the louvre 20 relative to the frame.

A louvre shutter comprising louvres 20 rotatably mounted in a frame on louvre axles, and a louvre drive system that, in summary, comprises a rack and pinion gear system including an externally operable rack assembly and a set of pinion gears 28 mounted to the louvre axles. The rack is externally operable rack and is reciprocably mounted in the drive system housing 42, 48. The pinion gears 28 mounted to the louvre axles are engaged with the rack such that reciprocation of the rack rotates the louvre 20 relative to the frame.

Embodiments of the present invention relates to a window system that a solar panel provided in the project window is easily detachable, and more particularly, a project type window system according to present invention includes a window frame; a project frame with an upper end hinged to an upper end of the window frame configured to be opened and closed in a project type while moving away or close with respect to the window frame; a louver frame provided inside the project frame; and a solar panel including a solar cell and a photovoltaic frame to support the solar cell; wherein the louver frame includes a supporting plate with a tilt hole elongated in a height direction of the project frame, a panel holder for fixing and holding the solar panel inside of the supporting plate by including a tilt shaft on an opposite side to which the solar panel is held and inserting the tilt shaft into the tilt hole, and a socket for tiltably supporting the solar panel with respect to the louver frame from an outside of the supporting plate by being coupled to the tilt shaft, wherein the photovoltaic frame is slide-inserted through an opened one end of the panel holder, and is supported by the other end of the panel holder, and wherein the photovoltaic frame is coupled to the panel holder in the other end of the panel holder.

A panel includes a panel frame for pivotally supporting louvers. The panel frame includes two vertical planks, two transverse planks and four connectors. Each of the vertical planks includes two ends. Each of the transverse planks includes two ends. Each of the tracks is formed on a corresponding one of the vertical planks. Each of the connectors includes a vertical strip, a horizontal strip, two flank strips and two crooks. The vertical strip is connected to a corresponding one of the ends of a corresponding one of the transverse planks in a detachable manner. The horizontal strip is connected to a corresponding one of the ends of a corresponding one of the vertical planks in a detachable manner. The flank strips extend on two sides of the vertical strip. The crooks extend toward each other from the flank strips, and render the track smoothly movable toward horizontal strip between two flank strips.

A panel includes a panel frame for pivotally supporting louvers. The panel frame includes two vertical planks, two transverse planks and four connectors. Each of the vertical planks includes two ends. Each of the transverse planks includes two ends. Each of the tracks is formed on a corresponding one of the vertical planks. Each of the connectors includes a vertical strip, a horizontal strip, two flank strips and two crooks. The vertical strip is connected to a corresponding one of the ends of a corresponding one of the transverse planks in a detachable manner. The horizontal strip is connected to a corresponding one of the ends of a corresponding one of the vertical planks in a detachable manner. The flank strips extend on two sides of the vertical strip. The crooks extend toward each other from the flank strips, and render the track smoothly movable toward horizontal strip between two flank strips.

A decorative shutter assembly securable to an opening of a building for security and storm protection. The shutter assembly includes a shutter frame that is hingedly mounted within a mounting assembly. The shutter assembly includes a plurality of operable shutter slats that extend between vertical shutter columns. Each shutter slat includes an elongate decorative shell disposed over an inner skeletal structure. The inner skeletal structure includes a pair of spaced-apart lateral louver rods extending the length of the decorative shell and a plurality of end caps which are affixed at respective ends of the lateral louver rods. A central rod extends the length of the decorative shell and is arranged for mounting within the shutter columns to enable pivotal movement of the shutter slats between closed and open positions.

A decorative shutter assembly securable to an opening of a building for security and storm protection. The shutter assembly includes a shutter frame that is hingedly mounted within a mounting assembly. The shutter assembly includes a plurality of operable shutter slats that extend between vertical shutter columns. Each shutter slat includes an elongate decorative shell disposed over an inner skeletal structure. The inner skeletal structure includes a pair of spaced-apart lateral louver rods extending the length of the decorative shell and a plurality of end caps which are affixed at respective ends of the lateral louver rods. A central rod extends the length of the decorative shell and is arranged for mounting within the shutter columns to enable pivotal movement of the shutter slats between closed and open positions.

A shutter system for a window or door is disclosed that includes at least one panel. The at least one panel includes: an inner frame; an outer frame configured for connection to the inner frame; a drive train that is supported by the inner frame; and a plurality of louvers that are connected to the drive train such that operation of the drive train moves the plurality of louvers between open and closed positions. The inner frame includes first segments each defining a longitudinal axis and a plurality of corner stakes that extend between and connecting the first segments. The outer frame includes second segments each defining a longitudinal axis and a plurality of brackets extending between and connecting the second segments.