Fallbrook Intellectual Property Company LLC

Roulunds Rotrex A/s

Anders Kolstrup

A continuously variable gear is described having an input shaft, a plurality of traction balls distributed radially around the axis, each traction ball is mounted on an axle passing there through, the axles are tiltable in the radial grooves in the housing and support plate. To control the position of the traction balls, the axles are guided in curved slots of a turnable iris plate. To control the axial placement of the traction balls, there is a rotatable input disc positioned adjacent to the traction balls, a rotatable output disc positioned adjacent to the traction balls opposite the input disc, and a pre-spanning ring around the traction balls such that each of the traction balls is making three-point contact with the input disc, the output disc and the pre-spanning ring, the contact surface of the pre-spanning ring having a specific curvature larger than the radius of the traction balls.

Continuously variable gear transmission

A continuously variable gear can include an input shaft, a plurality of traction balls distributed radially around the axis, each traction ball is mounted on an axle passing there through, the axles are tiltable in the radial grooves in the housing and support plate. To control the position of the traction balls, the axles are guided in curved slots of a turnable iris plate. To control the axial placement of the traction balls, there is a rotatable input disc positioned adjacent to the traction balls, a rotatable output disc positioned adjacent to the traction balls opposite the input disc, and a pre-spanning ring around the traction balls such that each of the traction balls is making three-point contact with the input disc, the output disc and the pre-spanning ring, the contact surface of the pre-spanning ring having a specific curvature larger than the radius of the traction balls.

A planetary gear comprising a central, rotatable input/output shaft (), an elastic outer ring () which when being elastically deformed encloses and presses at least three planet wheels () in the form of rollers radially against a centrally mounted sun shaft (), which extends axially in alignment with the input/output shaft (). The planet wheels () have central holes and are rotatably mounted on stays (), the centre lines of the stays () being parallel with the sun shaft (). At least two () of the planet wheels have substantially coinciding centres with the stays () associated with the planet wheels (), while the planet wheel or other planet wheels () as well as the associated stay or stays () is/are constructed such that the centre lines of the stays are positioned a given distance closer to the sun wheel () than the axes of the planet wheels () when the planet wheels () engage the sun shaft (). This results in an optimum transfer of moment, while achieving an accurate positioning of the sun shaft as well as the planet wheel or the other planet wheels against the at least two planet wheels having centres which coincide with the respective stays.

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Valby, Denmark

Anders Kolstrup