Patent ID: 6565471
Filing Date: 2003-05-20
Classification: F16H

Abstract:
A continuously variable hydro-mechanical transmission coupled to a power source and selectively coupled to a load, the hydro-mechanical transmission comprising:a transmission housing; a hydrostatic power unit associated with the housing and including a pump coupled to a motor with the hydrostatic power unit coupled to a first input shaft and a first output shaft, the hydrostatic power unit selectively coupled to a synchronous lock-up clutch with the first output shaft, wherein a hydrostatic input speed range is selected; a compound planetary gear unit mounted in the housing, the compound planetary gear unit including a second input shaft, a third input shaft, a fourth input shaft and a second output shaft, the compound planetary gear unit selectively coupled to the load, selectively coupled to the hydrostatic power unit and coupled to the power source; a load shaft coupled to the load and mounted for rotation in the housing; and an intermediate shaft supporting a range gear set mounted for rotation in the housing and selectively coupled to the compound planetary gear unit and the load shaft.