Multi-stage planetary gear train

Details Multi-stage planetary gear train Multi-stage planetary gear train

2006-09-19

2006-09-19

Ho, Ha (Department: 3681)

Planetary gear transmission systems or components

With means to vary drive ratio or disconnect drive

Plural elements selectively braked

C475S284000, C475S285000

Reexamination Certificate

active

07108629

ABSTRACT:
A multi-stage planetary gear train has an upper-side planetary set comprising a sun gear, a ring gear, an outer pinion meshed with the ring gear, an inner pinion meshed with the outer pinion and the sun gear, and a carrier rotatably supporting the pinions; and a lower-side planetary set comprising first, second, third and fourth members that are rotatable. The sun gear is connected with the input shaft, the first member is connected with the ring gear at first-forward speed, the second member is held to the transmission case by connection with the carrier at the first-forward speed and a reverse position and connected with the input shaft at forward speeds higher than 3rd speed, the third member is held to the transmission case by connection with the carrier at second-forward speed and connected with the ring gear at third-forward speed, the fourth member is connected with the output shaft.

REFERENCES:
patent: 2003/0232685 (2003-12-01), Sugihara et al.
patent: 2005/0130789 (2005-06-01), Samie et al.
patent: 2005/0130791 (2005-06-01), Raghavan et al.
patent: 3-199766 (1991-08-01), None

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