This invention is a new type of gear that will allow any non-planetary multi ratio gearing system to be configured in a superior way by consolidating half of the separate gears into one gear. Example: A five speed transmission needs ten separate gears for each drive ratio. One drive gear and one take-off gear for each speed. This invention consolidates either the five drive or the five take-off gears into a single gear by placing the meshing teeth on the surface of a single plate in concentric circles or rows. Each row will take the place of one gear.

Globular right-angle gearbox consists of two new types of gear that the body encloses them in the shape of a globe. Main gear 1 and flower gear 2 are created from parts of a hypothetical sphere. The new idea of using a diagonal axis causes two flower gears 2 to rotate in one direction by one main gear 1. And for the rotation of the main gear 1 with a diagonal axis, the idea of two gears with different diameters inside each other has been used. The centrality of the input and output shafts, simultaneously changes direction and ratio of the input force, the spherical shape and the multiplicity of effective variables in the design of this gearbox are its unique advantages. These unique properties of this gearbox make it applicable in many cases, including the joints of robot limbs, as well as the joints of human artificial limbs.

This invention discloses uninterrupted shifting in transmissions with the use of controlled rotation to achieve desired profile for input to output ratio, thereby eliminating synchronized clutch. Controlled rotation achieved using non-circular gears or Geneva pin and slot wheel mechanism with a customized path for the slot, is used to achieve multiple speed/infinitely variable transmission ratios and/or to transition from one transmission ratio to another. The transition happens over multiple rotations of the input making it highly suited for high torque applications. Since it is not using sprag or one way bearing engine breaking can be achieved. Infinitely Variable Transmission offers steady and uniform output for a steady and uniform input. With co-axial input and output, using planetary gear system, the output can be made continuous from forward to reverse. Multi-Speed uninterrupted shifting is achieved without the need for synchronizers and using a dog clutch or similar device.

A variable acceleration curved surface spiral gear transmission mechanism for accelerated oscillator damper damping systems is disclosed. Through the orthogonal orbit planetary gear set moving along the parallel circular arc line guide rail, the concave surface spiral gear and the convex surface spiral gear are meshed at different radii, so as to realize the continuous changing of the speed ratio and changing of the acceleration of the additional mass block. The spiral curve limit guide groove is set on the surface of concave surface spiral gear and convex surface spiral gear, and the changing rate of speed changing ratio is adjusted by designing different spiral curves, and then the acceleration changing rate of additional mass block is controlled.

A positively-engaged infinitely-variable transmission (PE-IVT) system employs a gear assembly including a first helical gear and a second helical gear meshed with the first helical gear. The first helical gear is divided into a plurality of gear segments that can individually move axially along a spline shaft. The PE-IVT system further includes a swashplate configured to constrain the axial motion of the plurality of gear segments. In some embodiments, the system further includes one or more thread-aligners configured to axially align a gear segment with one or more additional gear segments. In some embodiments, the second helical gear is also divided into a plurality of gear segments.

This invention relates to a drive system which automatically disengages when a loading above a certain threshold limit is applied to the driven component, thus preventing damage to the drive system and foremost to the gearing between the drive system and the driven component when such a load is applied.

A surgical instrument includes a handle assembly having a gear drive mechanism. The gear drive mechanism includes a variable radius gear to provide a desired mechanical advantage to a user during actuation of a movable handle of the surgical instrument.

A governor and inversion pump drive gear for an integrated drive generator has a gear body extending from a first end to a second end. There is an enlarged disc between the first and second ends. A boss extends from the enlarged disc toward the second end and has an internal bore with spline teeth. The enlarged disc has input gear teeth at an outer periphery. A shaft portion extends from the disc to the first end. A flange is formed at a location intermediate the first end and the enlarged disc. The inner gear teeth and the drive gear teeth have unique tooth profiles. An integrated dive generator and a method are also disclosed.

A transmission comprising: a casing having: a first shaft having a truncated cone portion, a second shaft parallel to and spaced away from the truncated cone portion, a first gear mounted on the second shaft, the first gear being configured for rotation with the second shaft, the first gear being in connection with the first shaft, a linear actuator connected to the first gear, the linear actuator allowing to position the first gear at any one of a plurality of positions along the second shaft, the truncated cone portion having, at its beginning and its end, a respective one of a set of gears with a respective diameter and a respective number of teeth being proportionate to a diameter of the truncated cone portion, at least two counter-wound spiral gear tracks extending between the respective one of the set of gear s and another one of the set of gears.

The present invention is a variable-ratio line gear mechanism. The mechanism forms a transmission pair consisting of a driving line gear and a driven line gear, of which axes intersect at an arbitrary angle. Transmission is generated by point contact meshing movement of line teeth between the driving line gear and the driven line gear. A contact curve of the line tooth is designed in accordance with space conjugate curve meshing theory, and the designing equation is divided into an equal transmission ratio part and a variable transmission ratio part. The equal transmission ratio part provides a uniform transmission, and the variable transmission ratio part makes the transmission ratio smoothly transit. The line gear mechanism is able to provide periodically transmission with variable transmission ratio, to provide a plurality of transmission ratios during a movement period of the driven line gear, and to enable smooth transitions between respective transmission ratios in accordance with movement rules.