Patent ID: 9664260
Date: 2017-05-30
CPC Classifications: F16H

Claim:
1. A rotational power transmission apparatus, comprising: a. a first shaft coupled to a second shaft and a third shaft, b. a fourth shaft; c. a fifth shaft; d. a multiport differential; e. said third shaft coupled to one port of said multiport differential so that said third shaft is between said first shaft and said multiport differential, f. said fourth shaft and said fifth shaft coupled to respective ports of said multiport differential; g. a differential engine coupled to the multiport differential so that said fourth shaft is between said differential engine and said multiport differential, and the second shaft is between the first shaft and the differential engine, the differential engine applying a variable speed conversion ratio between its input and its output, the differential engine being controllable to set the variable speed conversion ratio to a speed conversion ratio within a range of speed conversion ratios, and wherein input and output of said differential engine are bi-directional.