Automatic transmission for vehicles

Details Automatic transmission for vehicles Automatic transmission for vehicles

2008-06-20

2011-10-25

Lewis, Tisha (Department: 3655)

Planetary gear transmission systems or components

Nonplanetary variable speed or direction transmission...

Plural power paths to planetary gearing

C475S215000, C074S330000

Reexamination Certificate

active

08043187

ABSTRACT:
An automatic transmission for vehicles, whose weight, length, and manufacturing cost are reduced as a consequence of simplifying a structure thereof by removing a torque converter. The automatic transmission for vehicles may include a first shift portion outputting three intermediate rotational speeds of a same rotational speed as an input rotational speed, an increased rotational speed, and a reverse rotational speed by using torque received through first and second variable input pathways, and a second shift portion including first, second, third, and fourth gears that respectively achieve first, second, third, and fourth gear ratios, changing each intermediate rotational speed received from the first shift portion into four final rotational speeds, and outputting the same.

REFERENCES:
patent: 2757557 (1956-08-01), Hoffman
patent: 6893373 (2005-05-01), Kawamoto et al.
patent: 7311630 (2007-12-01), Borgerson
patent: 7695390 (2010-04-01), Phillips
patent: 7833120 (2010-11-01), Yang
patent: 2007/0243968 (2007-10-01), Ogata
patent: 2846917 (2004-05-01), None
Machine translation of FR2846917 on Apr. 1, 2011.

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