A spindle drive, a spindle nut for the spindle drive, and a louvre window or louvre shutter having a spindle drive for moving louvre elements. The spindle nut is constructed in multiple parts including a screw nut part, having an internal thread to engage on an external thread of the threaded spindle, and a bearing part in which the screw nut part is mounted. The screw nut part includes a driver structure for transmitting a drive force applied by the threaded spindle to the spindle nut onto an element to be driven. Furthermore, the screw nut part is rotatably mounted in the bearing part in such a way that the screw nut part executes a relative movement in relation to the bearing part, and a directional component of the movement is transverse to a thread longitudinal axis of the internal thread.

The invention relates to a refinement of a spindle drive (1), and to a louvered window or a louvered shutter having a spindle drive for moving louver elements such that applied return forces and return torques can be absorbed better, and in particular without placing a load on the drive motor. For this purpose, the spindle drive (1) has a specially designed return stop mechanism (6) arranged between a drive shaft of a drive motor (3) and a threaded spindle (4).

A twin louver bank window assembly for efficient thermal control, the assembly including an assembly surround frame including a head member, a sill member and at least a pair of opposed side channel members and a pair of louver banks mounted relative to the assembly surround frame, each louver bank including a number of louvers, one louver bank located towards an outer side of the assembly surround frame and one louver bank located toward an inner side of the assembly surround frame.

A shutter assembly includes a frame, at least one shutter panel coupled to the frame and configured to pivot about a first axis, and at least one louvered subpanel hinged to the shutter panel and configured to pivot about a second axis, wherein the first axis is not parallel to the second axis.

The invention relates to a refinement of a spindle drive (1), and to a louvered window or a louvered shutter having a spindle drive for moving louver elements such that applied return forces and return torques can be absorbed better, and in particular without placing a load on the drive motor. For this purpose, the spindle drive (1) has a specially designed return stop mechanism (6) arranged between a drive shaft of a drive motor (3) and a threaded spindle (4).

A spindle drive, a spindle nut for the spindle drive, and a louvre window or louvre shutter having a spindle drive for moving louvre elements. The spindle nut is constructed in multiple parts including a screw nut part, having an internal thread to engage on an external thread of the threaded spindle, and a bearing part in which the screw nut part is mounted. The screw nut part includes a driver structure for transmitting a drive force applied by the threaded spindle to the spindle nut onto an element to be driven. Furthermore, the screw nut part is rotatably mounted in the bearing part in such a way that the screw nut part executes a relative movement in relation to the bearing part, and a directional component of the movement is transverse to a thread longitudinal axis of the internal thread.

A twin louver bank window assembly for efficient thermal control, the assembly including an assembly surround frame including a head member, a sill member and at least a pair of opposed side channel members and a pair of louver banks mounted relative to the assembly surround frame, each louver bank including a number of louvers, one louver bank located towards an outer side of the assembly surround frame and one louver bank located toward an inner side of the assembly surround frame.

The system includes a series of operable louvers mounted on a four-sided frame and connected on each side to the operating mechanism that allows for easy opening and closing of the louvers. Every part of the system that is exposing to the exterior of the building is separated from the interior part of the system by a low heat conductivity material as a thermal barrier. Each operable louver is composing of a four-sided main frame, two panes of glass (inner and outer) and a coupling mechanism on each side that connects to the operating mechanism. The main frame acts as the thermal break as well as a system that absorbs the energy created when an outside object impacts the window from the outside. The system incorporates sealing devices between all moving parts to eliminate water and air infiltration. The operating system allows for easy opening and closing of the window by rotating each louver with the crank mechanism assisted by springs.

A venetian blind includes a frame unit, a slat unit, a transmission unit, and an operating unit. The slat unit includes multiple drive axles and a plurality of slats each connected co-rotatably to the drive axles. The transmission unit includes two transmission rollers, a plurality of constant-force coil springs that are linked together and that are coupled to the drive axles, and a belt that cooperates with the constant-force coil springs to form a loop trained on the transmission rollers. The operating unit includes an inner control member connected to the belt, and an outer control member operable to drive the inner control member to move so as to drive rotation of the drive axles via the constant-force coil springs to rotate the slats.

The system includes a series of operable louvers mounted on a four-sided frame and connected on each side to the operating mechanism that allows for easy opening and closing of the louvers. Every part of the system that is exposing to the exterior of the building is separated from the interior part of the system by a low heat conductivity material as a thermal barrier. Each operable louver is composing of a four-sided main frame, two panes of glass (inner and outer) and a coupling mechanism on each side that connects to the operating mechanism. The main frame acts as the thermal break as well as a system that absorbs the energy created when an outside object impacts the window from the outside. The system incorporates sealing devices between all moving parts to eliminate water and air infiltration. The operating system allows for easy opening and closing of the window by rotating each louver with the crank mechanism assisted by springs.