An actuator system including a harmonic drive operable to drive a variable vane system of a gas turbine engine.

An actuator system including a harmonic drive operable to drive a variable vane system of a gas turbine engine.

A gear drive device includes a first gear, and a second gear that meshes with the first gear to allow torque transmission. At least one of the first gear and the second gear includes a fan-type gear. The first gear and the second gear each include a guide portion, and the guide portion is configured to position the first gear and the second gear in a gear rotation direction upon installation thereof.

An actuator system including a harmonic drive operable to drive a variable vane system of a gas turbine engine.

An apparatus for raising and lowering a cutting tool within a decoking drum, a decoking system and a method of raising and lowering a decoking system cutting tool. Instead of using metallic ropes, chains, or a self-propelled gear-based approach, non-metallic belts are secured at respective ends to a crosshead and one or more counterweights to enable vertical movement of the crosshead that in turn permits vertical movement of the cutting tool throughout the height of the drum. A motorized pulley system controls the movement of the belt, and preferably avoids having the motor be carried by the crosshead. The belts on each pulley are preferably arranged as cooperative sets so that within each set, both primary load belts and secondary load belts are present. Enhanced engagement between at least the primary load belts and the pulleys promotes greater load-bearing capability, while the secondary load belts are sufficiently strong to ensure positional stability of the crosshead and decoking tool upon damage to or failure of one or more of the primary load belts.

A drive mechanism to move an optical component sensitive to particles is described. The drive mechanism has high precision in rotation, great reliability and durability life, no backlash, and far less particle contamination. The drive mechanism can be advantageously used in high precision rotation driving processes for opto-mechanical inspection systems that require high movement precision and no-contamination. In one embodiment, two pulleys are used with their axes to be parallel from each other, two bands are used to rotate the pulleys in opposite directions. An eccentric disk mechanism is used to fine-tune the distance between the two pulleys so that tensions on the two bands can be optimized.

The invention relates to a movement mechanism, which is provided with a base element and a support element, which, inserted into each other, form a ball hinge construction, the support element being rotatable relative to the base element about at least a first virtual axis, which passes substantially through a virtual center of the ball hinge construction. The support element is provided with drive means to enable the support element to be moved relative to the base element, which drive means comprise a first electric motor and a first drive train with an output gearwheel. The drive means are housed in the support element in order to move along with the support element when the support element is moved relative to the base element. The output gearwheel of the first drive train engages a non-straight, that is, curved, first drive rod located in the support element, this first drive rod being provided with an anchor part which is connected with the base element so that the first drive rod does not move along with the support element when the latter is moved relative to the base element.

The invention relates to an actuator mechanism for adjusting at least one angular position of a mirror element in an exterior mirror device for a motor vehicle. The actuator mechanism comprises a base element and a mirror element movably coupled with the base element, which comprises a mirror support for supporting a mirror surface. The mirror element is rotatable relative to the base element about at least a first pivoting axis with the aid of a first electric motor provided in the actuator mechanism, which extends in a longitudinal direction that is substantially transverse to a supporting surface of the mirror support. What can be elegantly facilitated by this, for instance also in the case of a relatively small mirror surface that is only a few centimeters wide and/or is only a few centimeters long, is that, as seen from a direction in which during use the mirror surface is being viewed by a driver, such electric motor does not protrude, or hardly protrudes, next to, above and/or below the mirror surface.

A mechanical transmission system, MTS (100), for a steerable tool (500) which steerable tool (500) has a proximal end (20) and distal end (40) and comprises a shaft region (532), a bendable proximal part, BPP (534) that is omnidirectionally moveable, and a bendable distal part, BDP, (530) that is omnidirectionally moveable and moves responsive to movement of the BPP (534), which MTS (100) comprises a plurality of longitudinal members, LM (110) each having a proximal (20) and distal end (40), arranged in a longitudinal direction around a fictive tube (120), and has a corresponding transmission shaft region, TSR (132), transmission bendable proximal part, TBPP (134) and transmission bendable distal part, TBDP (130), wherein a plane section (114) of at least one LM (110) demonstrates an anisotropic area moment of inertia, and the majority of the LMs (110) are each axially rotationally constrained at 1 or more constraining points along the TBDP (130) or along the TSR (132) wherein the LMs are longitudinally slidable with respect to each discrete constraining point, and the MTS (100) is configured such that the BDP (530) tip is axially rotationable in a bent position by a complementary rotation of the BPP (534).

An electromechanical orientation actuator (10) for orientating a sunscreen (SCR) with orientable blades (B1, B2, B3; B′1, B′2, B′3) comprises, in series, a motor (11), at least one first speed reduction module (21), a second speed reduction module (31) and a rocker (4) for orienting the blades (B1, B2, B3; B′1, B′2, B′3). The actuator (10) further comprises at least a third speed reduction module (43) in series between the second speed reduction module (31) and the orientation rocker (4). The actuator preferably belongs to a range of actuators further comprising an electromechanical movement actuator (110) for moving a sunscreen (SCR2) that can be moved between a raised position and a lowered position, comprising, in series, a motor (111), at least a first speed reduction module (121) and at least a winder (140) for a suspension cord (L3) of the first screen (SCR2) or for the first screen (SCR2). Notably, the two actuators have a speed reduction module of the same model. For preference, the motor of the first actuator and the motor (11) of the second actuator (10) have identical voltage/current characteristics.