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US Patent 7470208 Multistep automatic transmission with three planetary gear trains

Patent 7470208 was granted and assigned to ZF Friedrichshafen on December, 2008 by the United States Patent and Trademark Office.

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Patent
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Patent attributes

Current Assignee
ZF Friedrichshafen
ZF Friedrichshafen
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Patent Jurisdiction
United States Patent and Trademark Office
United States Patent and Trademark Office
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Patent Number
74702080
Patent Inventor Names
Armin Gierling0
Peter Tiesler0
Peter Ziemer0
Date of Patent
December 30, 2008
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Patent Application Number
105774830
Date Filed
October 2, 2004
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Patent Primary Examiner
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Sherry L Estremsky
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Patent abstract

A multistep automatic transmission having an input shaft, an output shaft, three planetary gearsets and five shifting elements. A sun gear of the third planetary gearset is affixed above the first shifting element to a transmission housing. The input shaft is bound to a sun gear of the second planetary gearset and is bound above the second shifting element with a sun gear of the first planetary gearset and/or by way of the fifth shifting element with a link of the first planetary gearset. The output shaft is bound together with the internal gear of the first planetary gearset and one of the links of the second or third planetary gearset. The second planetary gearset is located in the middle of the three planetary gearsets and is placed beside the third planetary gearset. The second and fifth shifting elements are placed between the first and second planetary gearsets.

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