Machine element or mechanism – Gearing – Interchangeably locked
Reexamination Certificate
2009-05-05
2011-12-06
Wright, Dirk (Department: 3655)
Machine element or mechanism
Gearing
Interchangeably locked
C475S209000, C074S331000
Reexamination Certificate
active
08069742
ABSTRACT:
A motor vehicle transmission having at least two transmission groups and a method for operation of the transmission in which a mechanism is provided for maintaining traction force during gearshifts. A first friction clutch is an intermediate-gear clutch connected to a driveshaft of the motor and to a main transmission shaft which is connected with a transmission output shaft, the second friction clutch is a change-under-load clutch connected to the driveshaft and to a loose wheel of a second gear constant of a splitter group, and the third friction clutch is a change-under-load clutch connected with the driveshaft and with a loose wheel of a first gear constant of the splitter group. A direct connection can be formed in the transmission between the driveshaft and the main transmission shaft by way of the intermediate-gear clutch and the gear constants of the splitter group can be shifted, under load, by the change-under-load clutches.
REFERENCES:
patent: 2058802 (1936-10-01), Kamper
patent: 3175411 (1965-03-01), McFarland
patent: 3389614 (1968-06-01), Shiber et al.
patent: 3906817 (1975-09-01), Kreitzberg
patent: 4610177 (1986-09-01), Mahoney
patent: 5435201 (1995-07-01), Preston et al.
patent: 6095001 (2000-08-01), Ruehle et al.
patent: 7976431 (2011-07-01), Bader et al.
patent: 2003/0176257 (2003-09-01), Matsumura et al.
patent: 2003/0209400 (2003-11-01), Organek et al.
patent: 2009/0107289 (2009-04-01), Borntrager
patent: 2009/0264241 (2009-10-01), Dittrich et al.
patent: 3626179 (1988-02-01), None
patent: 102005046899 (2007-05-01), None
patent: 10 2006 024 370 (2007-12-01), None
patent: 102006024370 (2007-12-01), None
patent: 0 933 558 (1999-08-01), None
patent: 1344965 (2003-09-01), None
patent: 191009604 (1911-04-01), None
patent: 58146723 (1983-09-01), None
patent: 2007031193 (2007-03-01), None
Dittrich Alan
Hoffmann Rayk
Davis & Bujold P.L.L.C.
Wright Dirk
ZF Friedrichshafen AG
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