An aircraft door, and, more particularly, to an electromechanical door system for operating an aircraft door that closes an opening in the outer hull of an aircraft, as well as to a method of operating an electromechanical door system of an aircraft door that closes an opening in the outer hull of an aircraft. The electromechanical door system may be adapted for operating in a normal opening mode, an emergency opening mode, and a closing mode. If desired, the electromechanical door system may include a lifting and lowering lever, a lifting and lowering electric motor, and a gearbox that transmits a force from the lifting and lowering electric motor to the lifting and lowering lever.

A swing gear set for a large scale or heavy machine can be produced from components of a swing gear set including an internal gear ring assembled from plurality of internal toothed segments and/or an external gear ring assembled from a plurality of external toothed segments. The internal toothed segments and/or the external toothed segments are produced by bisecting a metal block in the shape of a rectangular prism into first and second intermediate blanks. The metal block can be produced by a forging process and the intermediate blanks can be machined by various machining process to produce the finished internal and external toothed segments.

A swing gear set for a large scale or heavy machine can be produced from components of a swing gear set including an internal gear ring assembled from plurality of internal toothed segments and/or an external gear ring assembled from a plurality of external toothed segments. The internal toothed segments and/or the external toothed segments are produced by bisecting a metal block in the shape of a rectangular prism into first and second intermediate blanks. The metal block can be produced by a forging process and the intermediate blanks can be machined by various machining process to produce the finished internal and external toothed segments.

A gear device includes an internal gear and an external gear that meshes with the internal gear, in which the internal gear is made of a resin, the external gear is made of a material having a smaller linear expansion coefficient than the resin, and PCDs of the internal gear and the external gear before use of the gear device are set such that lost motion becomes 0 min or more and 15 min or less due to a difference in a thermal expansion amount between the internal gear and the external gear at a time of use of the gear device.

A gear device includes an internal gear and an external gear that meshes with the internal gear, in which the internal gear is made of a resin, the external gear is made of a material having a smaller linear expansion coefficient than the resin, and PCDs of the internal gear and the external gear before use of the gear device are set such that lost motion becomes 0 min or more and 15 min or less due to a difference in a thermal expansion amount between the internal gear and the external gear at a time of use of the gear device.

Methods and apparatus for mechanically driving components in a desired direction, such as in a moving craft. In one embodiment, the craft comprises a vertical or short takeoff and landing (VSTOL) aircraft comprising one or more rotating rings having airfoils disposed around a periphery thereof. In one variant, the one or more rings are driven by a multi-level drive apparatus having a plurality of angularly offset roller-based drive levels and a plurality of corresponding angularly offset driven members (e.g., rings), the plurality of driven members coupled to e.g., the at least one rotating ring. Advantageously, use of this arrangement provides enhanced reliability as well as opportunities for selective load balancing, and obviates comparatively heavy lubrication components such as seals and liquid lubricants, thereby also saving weight when applied to the host craft.

A rotatable base stand with a rotatable powering source that includes a lower base body, an electrical body plug for powering the rotatable base, an upper base body with a top surface defining an extension outlet port and with an extension electrical outlet coupled thereto, wherein the extension electrical outlet has outlet ports, is disposed within the extension outlet port, is oriented in a longitudinal direction, and is operably configured to electrically couple with the electrical body plug. The stand also includes an electrical extension plug electrically coupled to the extension electrical outlet and operably to provide power to objects supported by the base stand. The base stand also includes a bearing assembly and a motor that is operably coupled to the upper base body and operably configured to selectively rotate the upper base body 360° along a base rotation path with respect to the lower base body.

A rotatable base stand with a rotatable powering source that includes a lower base body, an electrical body plug for powering the rotatable base, an upper base body with a top surface defining an extension outlet port and with an extension electrical outlet coupled thereto, wherein the extension electrical outlet has outlet ports, is disposed within the extension outlet port, is oriented in a longitudinal direction, and is operably configured to electrically couple with the electrical body plug. The stand also includes an electrical extension plug electrically coupled to the extension electrical outlet and operably to provide power to objects supported by the base stand. The base stand also includes a bearing assembly and a motor that is operably coupled to the upper base body and operably configured to selectively rotate the upper base body 360° along a base rotation path with respect to the lower base body.

The invention relates to a transmission structure for a hybrid vehicle with an internal combustion engine, a first electric machine, and a second electric machine. In this case, a first electric machine shaft which is assigned to the first electric machine can be driven by a drive shaft which can be driven by the internal combustion engine via a first gear set. In this case, a travel drive gear of a differential gearing of the vehicle can be driven by a second electric machine shaft assigned to the second electric machine via a second gear set. The transmission structure can thereby be compactly designed and in particular, the use of the installation space and/or the efficiency of the electric machines can be improved in that the first gear set has a ring gear with inner teeth and a spur gear which engages with the inner teeth of the ring gear.

A transmission housing (2) of the type including two housing elements (9) that can be positioned to press against each other and that in the assembled-together state define: a cavity (13); a shaft (6) projecting at least in part from the housing (2); a motion transmission mechanism (30) for transmitting motion to said shaft (6), the motion transmission mechanism (30) being housed at least in part inside the cavity (13) of the housing (2); and sealing means (15) arranged in the zone where the housing elements (9) are pressed together and referred to as a join plane (10), the sealing means (15) surrounding said cavity (13). The housing (2) comprises means (17) for connecting the housing elements (9) together by snap-fastening in order to hold the housing elements (9) pressed against each other and the sealing means (15) comprise adhesive connection means (16) for connecting said housing elements (9) together.