8-speed transmission

Planetary gear transmission systems or components – With means to vary drive ratio or disconnect drive – Plural elements selectively braked

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C475S284000

Reexamination Certificate

active

07628725

ABSTRACT:
The transmission has a plurality of members that can be utilized in powertrains to provide eight forward speed ratios and one reverse speed ratio. The transmission includes four planetary gear sets, five torque-transmitting devices, a grounded member and two fixed interconnections. The powertrain includes an engine and torque converter that is continuously connected to one of the planetary gear members and an output member that is continuously connected with another one of the planetary gear members. The five torque-transmitting devices provide interconnections between various gear members, and the transmission housing, and are operated in combinations of two to establish eight forward speed ratios and one reverse speed ratio.

REFERENCES:
patent: 4070927 (1978-01-01), Polak
patent: 4676116 (1987-06-01), Nerstad et al.
patent: 4709594 (1987-12-01), Maeda
patent: 5106352 (1992-04-01), Lepelletier
patent: 5385064 (1995-01-01), Reece
patent: 5497867 (1996-03-01), Hirsch et al.
patent: 5560461 (1996-10-01), Loeffler
patent: 5599251 (1997-02-01), Beim et al.
patent: 5641045 (1997-06-01), Ogawa et al.
patent: 5651435 (1997-07-01), Perosky et al.
patent: 5975263 (1999-11-01), Forsyth
patent: 6053839 (2000-04-01), Baldwin et al.
patent: 6071208 (2000-06-01), Koivunen
patent: 6083135 (2000-07-01), Baldwin et al.
patent: 6217474 (2001-04-01), Ross et al.
patent: 6354416 (2002-03-01), Eo
patent: 6375592 (2002-04-01), Takahashi et al.
patent: 6422969 (2002-07-01), Raghavan et al.
patent: 6425841 (2002-07-01), Haka
patent: 6471615 (2002-10-01), Naraki et al.
patent: 6558287 (2003-05-01), Hayabuchi et al.
patent: 6623397 (2003-09-01), Raghavan et al.
patent: 6840885 (2005-01-01), Yi et al.
patent: 7226381 (2007-06-01), Klemen
patent: 7364527 (2008-04-01), Klemen
patent: 7524259 (2009-04-01), Raghavan

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

8-speed 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 8-speed transmission, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and 8-speed transmission will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-4127063

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.