Transmission with a steplessly adjustable transmission...

Details Transmission with a steplessly adjustable transmission... Transmission with a steplessly adjustable transmission...

2007-12-25

2007-12-25

Le, David D. (Department: 3681)

Planetary gear transmission systems or components

Nonplanetary variable speed or direction transmission...

Nonplanetary transmission is belt or chain gearing

C475S198000, C475S207000, C475S214000, C074S66500G, C074S66500G

Reexamination Certificate

active

10744945

ABSTRACT:
A branched power transmission having several transmission ratio ranges with a steplessly adjustable transmission ratio. A drive shaft is connected to both shafts of a variable speed unit through a distributor transmission, which shafts in turn are connected with the input shafts of a parallel gearbox through respective clutches. Two transmission ratio ranges differ from each other through the transmission ratio of an input shaft of the parallel gearbox and its output shaft. Additionally, the power-producing transmission can include an electrical machine. A further embodiment includes a variable speed unit, a first planetary transmission connected with a drive shaft, the input shaft of the variable speed unit and a connecting shaft, and a second planetary transmission that is connected with the connecting shaft of the output shaft of the variable speed unit and an output shaft, and an electrical machine that is non-rotatably connected with the connecting shaft.

REFERENCES:
patent: 5045028 (1991-09-01), Rattunde et al.
patent: 5643131 (1997-07-01), Kuhn et al.
patent: 5720686 (1998-02-01), Yan et al.
patent: 6056661 (2000-05-01), Schmidt
patent: 6293888 (2001-09-01), Moon
patent: 6447422 (2002-09-01), Haka
patent: 6566826 (2003-05-01), Imai et al.
patent: 2004/0082421 (2004-04-01), Wafzig

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