Load-splitting transmission

A load-splitting transmission comprising:

• a central shaft having coaxial and relatively rotatable input and output parts;
• two outer shafts flanking said central shaft, at least one of said outer shafts having a tube shaft, a core shaft in said tube shaft, and means rotationally interconnecting said core and tube shafts and permitting limited relative twisting of said core and tube shafts remote from said means;
• a plurality of sets of gears each including a central gear on said central shaft and two respective outer gears on said outer shafts each meshing continuously with the respective central gear, one of said outer gears of one of said sets being on said tube shaft and one of said outer gears of another of said sets being on said core shaft;
• means for rotationally coupling one of said central gears to said output part, another of said central gears being freely rotatable on said central shaft;
• and
• means for transmitting torque between said input part and both of said outer shafts, whereby the torque applied to said input end is imparted to both of said outer shafts and then split therebetween by means of said other central gear and is eventually summed by said one central gear and applied to said output part.