A shift system related to an improved continuously variable transmission (CVT) may include a power output assembly, a power input assembly, a collar assembly, and a connecting assembly to connect the power output assembly and power input assembly. The shift system is advantageous because it employs only gears and hydraulics for the transmission of power, which can be used in any torque scenario, from low-torque to heavy-duty scenarios such as large passenger automobiles, large trucks and heavy-duty machinery. Furthermore, there is no need to use additional energy to keep the transmission tight enough to engage and to prevent any slipping, and the overall efficiency of power transmission would be increased.

A linear stage assembly comprising a nut having a wall defining a bore which has a nut helical thread which includes: a crest, a root, and a flank between the crest and root; a screw having a screw helical thread about an exterior which includes: a crest, a root, and a flank between the crest and the root; wherein the nut and the screw are in a mating relationship so that the nut flank and the screw flank are in contact with one another defining a contact interface which imposes a frictional force that is sufficiently small to allow generally longitudinal movement in response to an actuation load of the screw or the nut relative to the other and sufficiently large to prevent back drive of the screw or the nut relative to the other after the actuation load is removed and in response to an opposing reaction force.

An engagement chain has two chain members. Each of the chain members includes link plates, each of which has two pin holes, and coupling pins. The two pin holes are aligned in the advancing/retreating direction and are sized differently from each other. Each of the coupling pins of each chain member is tightly received in the smaller pin hole of the two pin holes of one of any adjacent two of the link plates in the advancing/retreating direction and is loosely received in the larger pin hole of the two pin holes of the other one of the two adjacent link plates. In a state in which the chain members are integrated with each other, any two of the coupling pins that are opposed to each other are in the same received states in the corresponding pin holes.

An engagement chain has two chain members. Each of the chain members includes link plates, each of which has two pin holes, and coupling pins. The two pin holes are aligned in the advancing/retreating direction and are sized differently from each other. Each of the coupling pins of each chain member is tightly received in the smaller pin hole of the two pin holes of one of any adjacent two of the link plates in the advancing/retreating direction and is loosely received in the larger pin hole of the two pin holes of the other one of the two adjacent link plates. In a state in which the chain members are integrated with each other, any two of the coupling pins that are opposed to each other are in the same received states in the corresponding pin holes.

A linear motion guide device has a high rigidity, a good linear motion guiding accuracy, and as little rattling as possible. The linear motion guide device prevents sand, water or other contaminants from entering its actuator main body, and features low maintenance requirement. A linear motion member of the linear motion guide device includes a plurality of axially divided segments. Each of these segments supports a plurality of guided members which make contact with two, mutually paired, guide surfaces of a housing. A preload can be applied between the guide surfaces and the guided member. The housing has a sealed structure, with a pressure inside the housing higher than an external pressure, for preventing external sand and water from entering the housing.

A linear motion guide device has a high rigidity, a good linear motion guiding accuracy, and as little rattling as possible. The linear motion guide device prevents sand, water or other contaminants from entering its actuator main body, and features low maintenance requirement. A linear motion member of the linear motion guide device includes is constituted by a plurality of axially divided segments. Each of these segments supports a plurality of guided members which make contact with two, mutually paired, guide surfaces of a housing. A preload can be applied between the guide surfaces and the guided member. The housing has a sealed structure, with a pressure inside the housing higher than an external pressure, for preventing external sand and water from entering the housing.

A micro-movement subassembly as a precise driving screw for angle adjustment, comprising a shank, a turnbuckle, and a central cylindrical shaft. The subassembly is precise for linear displacement, good orientation, stable and reliable adjustment, which can be used for a variety of precision-oriented precision micro-angle adjustment of the drive screw.

An apparatus for opening and closing a deck lid of a vehicle body includes a jack-screw type drive unit having two elongated relatively rotatable drive elements which are threadably engaged for bi-directional displacement. An electric motor engages the rotatable drive element. A first mounting device pivotally connects the rotatable drive element to a relatively fixed point on the vehicle. A second mounting device pivotally connects the non-rotatable drive element to the deck lid, or vice versa. The motor is energized to affect bi-directional control of the drive unit while enabling low back-drive effort. A concentric spring counters loading due to the weight of the deck lid.

A ball screw device includes a screw shaft, a nut, a ball train including a plurality of main balls, and a plurality of coil springs disposed in the ball train. The nut moves from a first axial side to a second axial side while an axial force is applied to the nut by rotation of the screw shaft. The plurality of coil springs are more densely arranged on the first axial side than on the second axial side in the ball train.

A gear assembly for a seat adjuster includes a gear housing, a worm gear, a helical gear meshed with the worm gear, a wobble gear carried on an eccentric lobe of the helical gear, a pinion disc, a first ring gear disposed in the gear housing, a second ring gear disposed in the pinion disc, and a pinion member carrying the helical gear and the pinion disc. The wobble gear includes first and second sets of wobble gear teeth that mesh with the first and second ring gears, respectively. A housing side gear ring disposed in the gear housing defines part of the first ring gear and the gear housing defines another part of the first ring gear. A pinion disc gear ring disposed in the pinion disc defines part of the second ring gear and the pinion disc defines another part of the second ring gear.