Switching-valve arrangement for a shifting system of an...

Details Switching-valve arrangement for a shifting system of an... Switching-valve arrangement for a shifting system of an...

2006-04-05

2008-08-12

Le, David D. (Department: 3681)

Planetary gear transmission systems or components

Fluid drive or control of planetary gearing

Fluid controlled mechanical clutch or brake

C475S127000, C192S003580, C192S083000, C192S083000, C192S083000, C192S083000

Reexamination Certificate

active

07410438

ABSTRACT:
The invention relates to a switching-valve arrangement for a shifting system of an automatic transmission having a first actuator for engaging and releasing gears, at least a second actuator for engaging and releasing gears, a first activatable switching valve, a second activatable switching valve, a first signal element, and a second signal element. By means of the signal elements and switching valves the first and second actuators can be pressurized. In case of failure of one of the signal elements one of the actuators can always be pressurized and even in case of erroneous operation of the first and second signal elements only one of the actuators can be pressurized at the same time.

REFERENCES:
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patent: 2006/0046897 (2006-03-01), Mohlmann et al.
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Office Action issued by the EPO dated Oct. 2, 2007 for EP Application 05 102 756.3.
English translation of Office Action issued by the EPO dated Oct. 2, 2007 for EP Application 05 102 756.3.

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