Hydromechanical transmission with power branching

Details Hydromechanical transmission with power branching Hydromechanical transmission with power branching

1978-04-17

1983-05-10

Braun, Leslie

Machine element or mechanism

Elements

Gear casings

74682, F16H 4704, F16H 3706

Patent

active

043823920

ABSTRACT:
This invention is for a hydrostatic-mechanical transmission system of the power-branching type having a "neutral" operating mode. An assembly of a hydrostatic transmission including a variable displacement pump and a hydraulic motor is connected to the input shaft of a mechanical transmission. The mechanical transmission has a speed-range selector defining a first low-speed range for the gearing and a second high-speed range for the gearing. Two planetary gear sets in succession are coupled to the transmission such that the transmission ratios of the hydrostatic transmission and the mechanical transmission establish a neutral mode in each speed range a zero output contribution by the mechanical transmission.

REFERENCES:
patent: 3055233 (1962-09-01), Giles
patent: 3143898 (1964-08-01), Evernden
patent: 3371555 (1968-03-01), Tuck et al.
patent: 3433094 (1969-03-01), Phillips
patent: 3433095 (1969-03-01), Tuck
patent: 3470769 (1969-10-01), Livezey
patent: 3596535 (1971-08-01), Polak
patent: 3626787 (1971-12-01), Singer
patent: 3641843 (1972-02-01), Lemmens
patent: 3665788 (1972-05-01), Nyman
patent: 3675507 (1972-07-01), Takekawa
patent: 3714845 (1973-02-01), Mooney, Jr.
patent: 3783711 (1974-01-01), Orshansky, Jr.
patent: 3969957 (1976-07-01), De Lalio
"Characteristics of Multiple Range Hydromechanical Transmissions", Eli Orsharsky et al., Sep. 11-14, 1972, SAE.
"Leistungsverzweigung bei der Stufenlosen Drehzahlregelung et al.", Gunter Gackstetter, VDI-2, 108/1966/No. 6, Feb. [III].
"Uberlagerungsantriebe", Jean Thoma, 15 [1971], No. 3.

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