Planetary gear transmission systems or components – Fluid drive or control of planetary gearing – Fluid controlled mechanical clutch or brake
Reexamination Certificate
2007-10-16
2007-10-16
Lorence, Richard M. (Department: 3681)
Planetary gear transmission systems or components
Fluid drive or control of planetary gearing
Fluid controlled mechanical clutch or brake
C475S123000, C192S085060
Reexamination Certificate
active
11073594
ABSTRACT:
A hydraulic control apparatus of an automatic transmission. The hydraulic control apparatus of the automatic transmission has a hydraulic servo for controlling an engaging state of a clutch C-1on the basis of supplied oil pressure, a linear solenoid valve for C-1for outputting signal pressure by adjusting the oil pressure, a control valve for outputting control pressure provided by adjusting line pressure PLon the basis of the signal pressure of the linear solenoid valve for C-1, and a C-1apply relay valve for inputting, selectively switching and outputting the control pressure and the line pressure PLto the hydraulic servo. An orifice for regulating the flow rate of the oil is arranged in an oil path g for inputting the line pressure PLto this C-1apply relay valve.
REFERENCES:
patent: 5005444 (1991-04-01), Kimura et al.
patent: 2002-266995 (2002-09-01), None
Ishikawa Kazunori
Shibayama Yoshinori
Shimizu Tetsuya
Suzuki Akitomo
Tsuchida Kenichi
Aisin AW Co. Ltd.
Lorence Richard M.
Young Edwin A
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