Planetary gear transmission systems or components – Fluid drive or control of planetary gearing – Fluid pump and motor in one of plural paths to or from...
Patent
1994-05-31
1996-03-05
Ta, Khoi Q.
Planetary gear transmission systems or components
Fluid drive or control of planetary gearing
Fluid pump and motor in one of plural paths to or from...
475 80, 475 82, F16H 4704, B60K 1706
Patent
active
054962234
ABSTRACT:
A load shift transmission with stepless hydrostatic gearing comprising: a hydrostatic transmission having a displacement machine with an adjustable volume and a displacement machine with a constant volume; a five-shaft planetary gear transmission having: a coupling shaft for the constant volume displacement machine, the coupling shaft formed by a first planet gear section which meshes with a first sun gear and a first ring gear; a start up coupling shaft formed by a second planet gear section which meshes with a second sun gear; a slow running coupling shaft formed by a third planet gear section which meshes with a third sun gear; a fast running coupling shaft formed by the ring gear of the first planet gear section; an input shaft formed by a planet gear carrier on which the first, second and third planet gear sections are mounted; and an output shaft, wherein the coupling shafts alternately transfer the requisite power through subsequent gear shifting steps to the output shaft.
REFERENCES:
patent: 3364790 (1968-01-01), Jean-Jacques Asper et al.
patent: 3969958 (1976-07-01), Miyao et al.
patent: 5052987 (1991-10-01), Hagin et al.
patent: 5403241 (1995-04-01), Jarchow
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