Countershaft planetary transmissions

Details Countershaft planetary transmissions Countershaft planetary transmissions

2006-09-12

2006-09-12

Bonck, Rodney H. (Department: 3681)

Planetary gear transmission systems or components

With means to vary drive ratio or disconnect drive

Nonplanetary gearing combined with planetary

C475S218000, C475S329000

Reexamination Certificate

active

07104917

ABSTRACT:
A multi-speed power transmission includes a countershaft portion and a planetary gearset portion. The countershaft portion is controlled by synchronizer torque-transmitting mechanisms, and the planetary gearset portion is controlled by selectively engageable friction-type torque-transmitting mechanisms. The selective operation of these torque-transmitting mechanisms permit eight forward speed ratios and three reverse speed ratios.

REFERENCES:
patent: 5310390 (1994-05-01), Shirataki
patent: 5823051 (1998-10-01), Hall, III
patent: 5971883 (1999-10-01), Klemen
patent: 6066062 (2000-05-01), Pigozzi
patent: 2003/0040388 (2003-02-01), Sakamoto et al.
patent: 02225844 (1990-09-01), None

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