Gear-operated speed change apparatus for automatic transmission

Details Gear-operated speed change apparatus for automatic transmission Gear-operated speed change apparatus for automatic transmission

2005-06-28

2005-06-28

Marmor, Charles A (Department: 3681)

Planetary gear transmission systems or components

With means to vary drive ratio or disconnect drive

Plural elements selectively braked

C475S271000, C475S276000

Reexamination Certificate

active

06910985

ABSTRACT:
A gear-operated speed change apparatus for an automatic transmission, which can make the degree of freedom for selecting a gear ratio higher than that of the case using the Ravigneaux type composite planetary gear train, while achieving a strength advantage of the gear train, an improvement in the fuel economy, coaxial positioning of the input port and output portions and size reduction of the automatic transmission altogether. The apparatus can achieve at least seven forward speeds and one reverse speed by engaging/releasing four clutches and two brakes. One of the three planetary gear sets can reduce the speed of an input rotation always or increase the input rotation always. One of the remaining two planetary gear sets is a double sun gear type planetary gear set including a third carrier having a center member positioned between two sun gears for inputting or outputting a rotation.

REFERENCES:
patent: 3440901 (1969-04-01), Chambers
patent: 3722323 (1973-03-01), Welch
patent: 3835732 (1974-09-01), Mori et al.
patent: 4027551 (1977-06-01), Murakami et al.
patent: 4027552 (1977-06-01), Murakami et al.
patent: 4513634 (1985-04-01), Ohtsuka
patent: 5106352 (1992-04-01), Lepelletier
patent: 6558287 (2003-05-01), Hayabuchi et al.
patent: 6752737 (2004-06-01), Ishimaru et al.
patent: 2002/0091032 (2002-07-01), Hayabuchi et al.
patent: 2004/0077452 (2004-04-01), Ishimaru et al.
patent: 50-160649 (1975-12-01), None
patent: 51-64156 (1976-06-01), None
patent: 51-91465 (1976-08-01), None
patent: 2001-182785 (2001-07-01), None

Affiliated with

Also associated with

Rating

Gear-operated speed change apparatus for automatic transmission does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Gear-operated speed change apparatus for automatic transmission, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gear-operated speed change apparatus for automatic transmission will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3501487