Automatic transmission

Details Automatic transmission Automatic transmission

2004-04-15

2008-03-18

Ho, Ha D. (Department: 3681)

Planetary gear transmission systems or components

With means to vary drive ratio or disconnect drive

Orbit braked

C475S320000, C475S323000

Reexamination Certificate

active

07344471

ABSTRACT:
An automatic transmission comprises a planetary gear train (PG) including a sun gear (S) connected to a first main shaft (3), a carrier (C) and a ring gear (R); a first gear train (G1) including a first drive gear (6) connected to the ring gear (R), and a first driven gear (7) disposed rotatably over a countershaft (5) and meshed with the first drive gear (6); a third gear train (G3) including a third drive gear (10) disposed rotatably with respect to the carrier (C), and a third driven gear (11) connected to the countershaft (5) and meshed with the third drive gear (10); a first brake (B1) for holding the ring gear (R) stationary, a first clutch (C1) for engaging/disengaging the first driven gear (7) to/from the countershaft (5); a third clutch (C3) for engaging/disengaging the third drive gear (10) to/from the carrier (C); and a fourth clutch (C4) for bringing the sun gear (S) and the ring gear (R) into engagement/disengagement with each other.

REFERENCES:
patent: 2812670 (1957-11-01), Winther
patent: 2865232 (1958-12-01), Nardone
patent: 6685595 (2004-02-01), Ohkubo et al.
patent: 6860832 (2005-03-01), Hoher
patent: 6893373 (2005-05-01), Kawamoto et al.
patent: 60-4651 (1985-01-01), None
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patent: 4-73445 (1992-03-01), None
patent: 5-172200 (1993-07-01), None
patent: 6-221389 (1994-08-01), None
patent: 8-210445 (1996-08-01), None
patent: 2000-304107 (2000-11-01), None
patent: 2002-504979 (2002-02-01), None
patent: WO98/57072 (1998-12-01), None

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