Power transmission with preselected ratios and a preselected...

Details Power transmission with preselected ratios and a preselected... Power transmission with preselected ratios and a preselected...

2006-07-04

2006-07-04

Ho, Ha (Department: 3681)

Planetary gear transmission systems or components

Nonplanetary variable speed or direction transmission...

Nonplanetary transmission is friction gearing

C475S207000, C475S218000, C074S745000, C074S331000

Reexamination Certificate

active

07070534

ABSTRACT:
A power transmission includes a plurality of ratio gear members, a planetary splitter, and a plurality of splitter control gear members. The ratio gear members are divided between two countershafts and two input clutches such that two power paths are provided from the transmission input. The splitter control gear members are disposed on the output of each of the ratio gears to establish input power paths to the planetary splitter, which delivers power to the transmission output shaft. By providing selective engagement of two selectively operable input clutches, a plurality of mechanical clutches and the planetary splitter gearset eight forward speed ratios are provided. A ninth forward ratio is provide by a mechanical clutch directly interconnecting one of the input clutches with the transmission output shaft in bypassing relation to the planetary splitter.

REFERENCES:
patent: 3589483 (1971-06-01), Smith
patent: 4461188 (1984-07-01), Fisher
patent: 5383374 (1995-01-01), Reynolds
patent: 5492034 (1996-02-01), Bogema
patent: 5823051 (1998-10-01), Hall, III
patent: 5971883 (1999-10-01), Klemen
patent: 6056661 (2000-05-01), Schmidt
patent: 2004/0144190 (2004-07-01), Hall
patent: 10037134 (2002-06-01), None

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