An aircraft seat includes an actuator and a movement transmission device. The transmission device includes a frame provided with an immobilizing portion and a drive shaft. The transmission device further includes a gear wheel provided with coupling teeth having inclined side walls and a sleeve with an immobilizing portion complementary to the immobilizing portion of the frame, and coupling teeth having inclined side walls. The transmission device also has an elastic member configured to push the sleeve. The stiffness of the elastic member and the inclination of the side walls of the coupling teeth of the gear wheel and sleeve are chosen such that, when a torque greater than a threshold torque is applied to the gear wheel, the sleeve slides on the drive shaft from a position of coupling the sleeve to the gear wheel to a position of immobilizing the sleeve relative to the frame.

A transmission assembly includes a cavity in a female U-joint having a groove that extends radially outward from an inner diameter thereof and bounded by three planar drive surfaces. A male U-joint member includes a drive end includes a longitudinal rectangular extension protruding radially outward from a periphery and positioned within the groove of the cavity. The drive end includes a longitudinal rectangular insert has a portion forming the extension positioned within the groove and retained within the drive end. The extension includes (1) opposing longitudinal sides, each forming a side crest disposed between a pair of angular side surfaces that extend axially from the side crest inward toward a center of the extension, and (2) a top side forming a top crest disposed between a pair of angular top surfaces that extend axially from the top crest downward toward the center of the extension.

A transmission assembly includes a cavity in a female U-joint having a groove that extends radially outward from an inner diameter thereof and bounded by three planar drive surfaces. A male U-joint member includes a drive end includes a longitudinal rectangular extension protruding radially outward from a periphery and positioned within the groove of the cavity. The drive end includes a longitudinal rectangular insert has a portion forming the extension positioned within the groove and retained within the drive end. The extension includes (1) opposing longitudinal sides, each forming a side crest disposed between a pair of angular side surfaces that extend axially from the side crest inward toward a center of the extension, and (2) a top side forming a top crest disposed between a pair of angular top surfaces that extend axially from the top crest downward toward the center of the extension.

A rotor shaft assembly for a torque-transmitting connection of a gearbox unit to a generator unit includes an output shaft for the gearbox unit, a rotor shaft for the generator unit, and a curved tooth coupling designed to connect the output shaft and the rotor shaft to one another The curved tooth coupling includes a releasably fastened supporting element designed to axially position the curved tooth coupling and including a mating face to support an axial force of the curved tooth coupling, with the mating face being designed to slide on a corresponding support face of the output shaft or of the rotor shaft when the output shaft is tilted relative to the rotor shaft.

A clutch as used, for example, in vehicle drives, in particular rail vehicle drives. A clutch is specified, by way of which the electric contact between the drive side and the output side of the clutch is prevented reliably, and a simple and inexpensive method for the production thereof is also specified. The problem is solved by way of a clutch, at least consisting of a clutch half on the drive side and a clutch half on the output side, wherein at least one clutch half has at least two hollow cylinders which are arranged above one another and are arranged in a bore of the clutch half, wherein the second hollow cylinder consists of electrically insulating material, and wherein at least the first hollow cylinder, at least on its outer circumferential surface, and at least the inner circumferential surface of the bore have knurling at least in part.

There is disclosed a coupling unit (100) for transmission of a rotary driving force, comprising a first coupling member (110) having a curved first bearing surface (116) and a second coupling member (150) having a main coupling body (154) and a curved second bearing surface engaging the first bearing surface thereby enabling rotation of the second coupling member (150) relative to the first coupling member (110). The second coupling member comprises at least two carrying elements (158) which are each provided with a respective one of at least two second bearing surface segments (160) of the second bearing surface that engage the first bearing surface. At least two connecting elements (156) of the second coupling member (150) each connect a respective one of the at least two carrying elements (158) with the main coupling body (154) and comprise an elastically deformable material. In a first deformed condition the elastically deformable material provides a first biasing force urging the at least two second bearing surface segments (160) into contact with the first bearing surface. A blocking element (120) of the first coupling member (110) is arranged between the first bearing surface (116) and the main coupling body (154) and is configured to prevent passage of the carrying elements (158) along the blocking element at least in the first deformed condition. In a second deformed condition of the elastically deformable material, wherein the elastically deformable material provides a second biasing force larger than the first biasing force, the carrying elements (158) are able to pass along the blocking element.

A print bar for inkjet printing includes print heads disposed in a row, adjustment devices for adjusting the print heads relative to one another in which each of the adjustment devices includes at least one screw and at least one shaft for rotating the at least one screw, and a compensation coupling interconnecting the screw and the shaft. The compensation coupling includes a first coupling half and a second coupling half configured to fit together under elastic deformation. The first coupling half includes spring claws having a first pitch and the first coupling half is disposed on the shaft. The second coupling half including a toothing having a second pitch and the second coupling half is disposed on the screw. The first and second pitches differ from one another.

A print bar for inkjet printing includes print heads disposed in a row, adjustment devices for adjusting the print heads relative to one another in which each of the adjustment devices includes at least one screw and at least one shaft for rotating the at least one screw, and a compensation coupling interconnecting the screw and the shaft. The compensation coupling includes a first coupling half and a second coupling half configured to fit together under elastic deformation. The first coupling half includes spring claws having a first pitch and the first coupling half is disposed on the shaft. The second coupling half including a toothing having a second pitch and the second coupling half is disposed on the screw. The first and second pitches differ from one another.

An aircraft seat includes an actuator and a movement transmission device. The transmission device includes a frame provided with an immobilizing portion and a drive shaft. The transmission device further includes a gear wheel provided with coupling teeth having inclined side walls and a sleeve with an immobilizing portion complementary to the immobilizing portion of the frame, and coupling teeth having inclined side walls. The transmission device also has an elastic member configured to push the sleeve. The stiffness of the elastic member and the inclination of the side walls of the coupling teeth of the gear wheel and sleeve are chosen such that, when a torque greater than a threshold torque is applied to the gear wheel, the sleeve slides on the drive shaft from a position of coupling the sleeve to the gear wheel to a position of immobilizing the sleeve relative to the frame.

The present disclosure is directed to a flexible supporting structure that includes a linkage mechanism capable of being bent for adjustment. The linkage mechanism includes at least one row of a linkage plate assembly, and the linkage plate assembly includes at least two linkage toothed plates which are meshed and connected in sequence. At least one end portion of each of the at least two linkage toothed plates is provided with a meshing tooth portion such that a first meshing tooth portion of a first linkage toothed plate is meshed with a second meshing tooth portion of a second linkage toothed plate. The flexible supporting structure is applicable to various products and provides a function of adjusting an angle or a bending degree in a wide range by using linkage between the linkage toothed plates.