Patent ID: 9540994
Date: 2017-01-10
CPC Classifications: F01B,F02B,F16H

Claim:
1. A gearset, comprising: a fixed internal ring gear having a pitch diameter, a plurality of internal teeth, and a central axis, the plurality of internal teeth comprising a first quantity of teeth; a first pinion gear having a pitch diameter, a plurality of teeth and a hole through a central axis thereof, the first pinion gear being disposed within the internal ring gear such that the plurality of teeth of the first pinion gear mesh with the plurality of internal teeth of the internal ring gear, the plurality of teeth of the first pinion gear comprising a second quantity of teeth, the second quantity of teeth being half the first quantity of teeth of the internal ring gear, the pitch diameter of the first pinion gear being half the pitch diameter of the internal ring gear; a disc having a substantially circular cross-section, a central axis collinear with the central axis of the internal ring gear, a first side facing toward the internal ring gear, a second side facing away from the internal ring gear, and an output shaft extending from the second side, the output shaft having a central axis that is collinear with the central axis of the disc, the disc being free to rotate about the central axis and restrained from displacement or rotation other than rotation about the central axis, the disc further including at least one slot along a portion of a diameter of the first side of the disc, the at least one slot having a first end, a second end, and a depth that is less than a thickness of the disc; a first pinion shaft having a first end and a second end, and extending through the hole of the first pinion gear, the second end of the first pinion shaft engaging the first end of the at least one slot of the disc; a second pinion gear having a plurality of teeth and a hole through a central axis thereof, the second pinion gear being disposed within the internal ring gear such that the plurality of teeth of the second pinion gear mesh with the plurality of internal teeth of the internal ring gear, the second pinion gear being axially offset from the first pinion gear such that the plurality of teeth of the second pinion gear do not mesh with the plurality of teeth of the first pinion gear and rotationally offset from the first pinion gear by half a rotation about the internal ring gear, the plurality of teeth of the second pinion gear comprising the second quantity of teeth; and a second pinion shaft having a first end and a second end and extending through the hole of the second pinion gear, the second end of the second pinion shaft engaging with the second end of the at least one slot of the disc.