Patent ID: 7765889
Filing Date: 2010-08-03
Classification: F16H,Y10T

Abstract:
1. A coaxial mechanical reduction gearset with a continuously decreasing reduction ratio, the comprising a plurality of variable-radius gears for a phase of starting up a rotary machine, wherein said gears have uniformly varying radii, the reduction ratio at the end of the start-up phase is 1:1 in direct drive, and the reduction gearset at that point then no longer has any internal moving part, and wherein the variable-radius gears are symmetric and exhibit a radius varying up to a maximum of the radii, wherein the reduction gearset comprises two pinions which have axes common to said gears and a respective radius, the ratio between said pinions being the same as the ratio between the maximum of the radii of the variable-radius gears; and a device which blocks the rotation of the variable-radius gears and pinions at the end of the start up phase at the minimum reduction point of 1:1 and enables the rotation for reengagement at the point of maximum reduction.