Machine element or mechanism – Gearing – Interchangeably locked
Reexamination Certificate
2008-02-20
2010-11-02
Wright, Dirk (Department: 3655)
Machine element or mechanism
Gearing
Interchangeably locked
Reexamination Certificate
active
07823473
ABSTRACT:
The electro-hydraulic control system comprises a gear shift control device and a hydraulic control circuit. The gear shift control device includes four shift forks, operatively associated each to a respective engagement sleeve of the transmission to cause this latter to move between first and second engagement positions, and an operating unit comprising four double-acting hydraulic actuators arranged to control each the displacement of a respective shift fork. The hydraulic control circuit comprises a supply unit, a distributor valve adapted to select every time one of the four hydraulic actuators and two solenoid valves adapted to control the hydraulic actuator selected by the distributor valve. The distributor valve has four operating positions, each of which corresponds to the selection of a respective hydraulic actuator. The two solenoid valves are arranged to be connected each to a respective pressure chamber of the hydraulic actuator selected by the distributor valve.
REFERENCES:
patent: 7073407 (2006-07-01), Stefina
patent: 7127961 (2006-10-01), Braford et al.
patent: 7418885 (2008-09-01), Muller et al.
patent: 7464618 (2008-12-01), Mohlmann et al.
patent: 2006/0185458 (2006-08-01), Gerlofs et al.
patent: 101 25 172 (2002-11-01), None
patent: 1 216 371 (2002-06-01), None
patent: 1 596 104 (2005-11-01), None
patent: 1 619 422 (2006-01-01), None
Baret Carlo Emilio
Caenazzo Dario
Garabello Marco
Pastorello Valter
Pregnolato Gian Luigi
C.R.F. Societa Consortile per Azioni
Sughrue & Mion, PLLC
Wright Dirk
LandOfFree
Electro-hydraulic control system for a motor-vehicle... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Electro-hydraulic control system for a motor-vehicle..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electro-hydraulic control system for a motor-vehicle... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4177502