Planetary gear transmission systems or components – With means to vary drive ratio or disconnect drive – Plural drive ratios other than unity
Reexamination Certificate
2006-01-31
2006-01-31
Bonck, Rodney H. (Department: 3681)
Planetary gear transmission systems or components
With means to vary drive ratio or disconnect drive
Plural drive ratios other than unity
C475S271000, C475S272000, C475S275000, C475S276000, C475S277000, C475S278000
Reexamination Certificate
active
06991578
ABSTRACT:
A multi-step gear including a drive shaft linked with a non-shiftable front-mounted gear train, an output shaft linked with a shiftable rear-mounted gear train with four free shafts, and shift elements for selective shifting without group shifts. The first free shaft of the rear gear train is linked with a first shift element, the second free shaft with second and third shift elements, the third free shaft with fourth and fifth shift elements and the fourth free shaft with the output shaft. With six shift elements, the first or third free shaft of the rear-mounted gear is additionally linked with a sixth shift element. With seven shift elements, the third free shaft is additionally linked with a sixth shift element and the first free shaft is additionally linked with a seventh shift element.
REFERENCES:
patent: 3956946 (1976-05-01), Murakami et al.
patent: 5049116 (1991-09-01), Asada
patent: 5106352 (1992-04-01), Lepelletier
patent: 5342257 (1994-08-01), Hotta et al.
patent: 5599251 (1997-02-01), Beim et al.
patent: 6053839 (2000-04-01), Baldwin et al.
patent: 6083135 (2000-07-01), Baldwin et al.
patent: 6302820 (2001-10-01), Ried
patent: 6514170 (2003-02-01), Kao et al.
patent: 6558287 (2003-05-01), Hayabuchi et al.
patent: 6648790 (2003-11-01), Raghavan et al.
patent: 6723018 (2004-04-01), Hayabuchi et al.
patent: 6736749 (2004-05-01), Bucknor et al.
patent: 2003/0162623 (2003-08-01), Raghavan et al.
patent: 689 07 338 (1993-11-01), None
patent: 690 10 472 (1995-03-01), None
patent: 199 10 299 (2001-04-01), None
patent: 199 49 507 (2001-04-01), None
patent: 10115987 (2002-10-01), None
patent: 0 427 459 (1990-11-01), None
patent: 1 013 968 (1999-06-01), None
Bonck Rodney H.
Davis & Bujold P.L.L.C.
Le David D.
ZF Friedrichshafen AG
LandOfFree
Multistep gear does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Multistep gear, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multistep gear will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3554339