Planetary gear transmission systems or components – Nonplanetary variable speed or direction transmission... – Nonplanetary transmission is friction gearing
Reexamination Certificate
2008-07-08
2008-07-08
Pang, Roger (Department: 3681)
Planetary gear transmission systems or components
Nonplanetary variable speed or direction transmission...
Nonplanetary transmission is friction gearing
C475S216000
Reexamination Certificate
active
07396309
ABSTRACT:
A split power transmission with a variable drive, a brake, a clutch, an integrating transmission containing a planetary set, the internal gear forming the output of the transmission, and an additional planetary set located between the drive shaft and the transmission. A portion of the transmission drive shaft power is transferable to the transmission which includes a secondary shaft located axially parallel to the variable drive. The power of the variable drive is directed towards the integrating transmission via the secondary shaft by using a defined transmission ratio. Torque division in the low cruising range and is achieved by locking the brake connecting the internal gear of the planetary set located between the drive shaft, and the transmission to the unit. Whereas in the high cruising range, by engaging the clutch the sun gear of the transmission is interlocked with the internal gear of the transmission.
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patent: 6155951 (2000-12-01), Kuhn et al.
patent: 6726590 (2004-04-01), Henzler et al.
patent: 2005/0075209 (2005-04-01), Wafzig et al.
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Casals Pedro
Diosi Gabor
Gumpoltsberger Gerhard
Heitz Uwe
Vahlensieck Bernd
Davis & Bujold & Daniels, P.L.L.C.
Pang Roger
Young Edwin A
ZF Friedrichshafen AG
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