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
1996-01-05
1997-12-09
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 79, 475 80, F16H 4704, B60K 1704, B60K 4116
Patent
active
056954220
ABSTRACT:
A hydrostatic-mechanical infinitely variable transmission for a vehicle includes a hydrostatic unit and a mechanical unit. The mechanical unit is a planetary drum and includes a planetary summation gearing and further planetary transmission gearings. The planetary drum has an input shaft and an output shaft which are concentric to the engine output shaft. The axis of the hydrostatic unit is parallel to and lower than the axis of the planetary drum so that the rotating parts of the planetary drum are above the level of oil in the transmission sump. The sealed hydrostatic unit is immersed in the oil of the sump and cooled thereby The output shaft of the transmission is parallel to the axis of the planetary drum. The output of the planetary drum is coupled to the transmission output shaft by a gear train. This makes it possible to adjust the spacing and the transmission ratio between the planetary drum output and the transmission output shaft as desired.
REFERENCES:
patent: 3293943 (1966-12-01), MacDonald
patent: 3665788 (1972-05-01), Nyman
patent: 3796111 (1974-03-01), Schauer
patent: 3897697 (1975-08-01), Chambers et al.
patent: 5222921 (1993-06-01), Garcia
Deere & Company
Ta Khoi Q.
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