The present disclosure describes innovations to improve the use of noncircular gear pairs in a transmission, e.g., an infinitely variable transmission. The noncircular gear pair includes a first noncircular gear with a first pitch curve; and a second noncircular gear with a second pitch curve. The first pitch curve includes a plurality of elliptical portions, and a curvature of the first pitch curve is positive along the entire first pitch curve; and wherein the second pitch curve is a conjugate of the first pitch curve.

Disclosed herein are multi-turn drive assemblies, systems and methods of use thereof. The multi-turn drive assemblies enable a robot link member to have a maximum rotation of at least 360 degrees about an axis. The multi-turn drive assemblies can be incorporated into a robot arm for enabling 360 degrees rotation of one or more link members about an axis. The robot arm may be located in a transfer chamber of an electronic device processing system. Also disclosed are methods of controlling the multi-turn drive assemblies and related robots.

Disclosed herein are multi-turn drive assemblies, systems and methods of use thereof. The multi-turn drive assemblies enable a robot link member to have a maximum rotation of at least 360 degrees about an axis. The multi-turn drive assemblies can be incorporated into a robot arm for enabling 360 degrees rotation of one or more link members about an axis. The robot arm may be located in a transfer chamber of an electronic device processing system. Also disclosed are methods of controlling the multi-turn drive assemblies and related robots.

Mechanisms for converting rotational motion into other types of motion, in particular uniform translational motion, are disclosed, and can be used as an oscillation compensator for stepping wheel propulsion units. An oscillation compensating device for a stepping wheel propulsion unit including supports fastened symmetrically to an output shaft that is fastened for transverse motion is actuated by an input shaft, the output shaft being fastened on the free end of a crank. The output shaft is set into rotation via a variator, which varies the angular velocity of the output shaft according to the current position of the crank and the angular velocity thereof. The need for cam mechanisms and springs in the device can be obviated, the coefficient of friction and the dimensions of the device can be reduced, and both spatial and speed oscillations can be significantly reduced.

Mechanisms for converting rotational motion into other types of motion, in particular uniform translational motion, are disclosed, and can be used as an oscillation compensator for stepping wheel propulsion units. An oscillation compensating device for a stepping wheel propulsion unit including supports fastened symmetrically to an output shaft that is fastened for transverse motion is actuated by an input shaft, the output shaft being fastened on the free end of a crank. The output shaft is set into rotation via a variator, which varies the angular velocity of the output shaft according to the current position of the crank and the angular velocity thereof. The need for cam mechanisms and springs in the device can be obviated, the coefficient of friction and the dimensions of the device can be reduced, and both spatial and speed oscillations can be significantly reduced.

Gear device for an adjustment drive device of a motor vehicle. The gear device includes an input gearwheel and an output gearwheel driven by the input gearwheel. The input gearwheel includes a first gearwheel and a second gearwheel coaxial to and rotationally fixed relative to the first gearwheel. The output gearwheel includes a third gearwheel and a fourth gearwheel coaxial to and rotationally fixed relative to the third gearwheel. The input gearwheel and the output gearwheel are positioned relative to one another such that in a first circumferential region of the input gearwheel, toothing formed on the first gearwheel is to mesh with toothing formed on the third gearwheel, and in a second circumferential region of the input gearwheel, toothing formed on the second gearwheel is to mesh with toothing formed on the fourth gearwheel.

Gear device for an adjustment drive device of a motor vehicle. The gear device includes an input gearwheel and an output gearwheel driven by the input gearwheel. The input gearwheel includes a first gearwheel and a second gearwheel coaxial to and rotationally fixed relative to the first gearwheel. The output gearwheel includes a third gearwheel and a fourth gearwheel coaxial to and rotationally fixed relative to the third gearwheel. The input gearwheel and the output gearwheel are positioned relative to one another such that in a first circumferential region of the input gearwheel, toothing formed on the first gearwheel is to mesh with toothing formed on the third gearwheel, and in a second circumferential region of the input gearwheel, toothing formed on the second gearwheel is to mesh with toothing formed on the fourth gearwheel.