192 clutches and power-stop control – Vortex-flow drive and clutch – Including drive-lockup clutch
Reexamination Certificate
2006-09-05
2006-09-05
Rodriguez, Saul (Department: 3681)
192 clutches and power-stop control
Vortex-flow drive and clutch
Including drive-lockup clutch
C192S085060
Reexamination Certificate
active
07100753
ABSTRACT:
A replacement torque converter clutch (TCC) apply valve for regulating the application of the torque converter clutch within an automatic transmission. The present TCC apply valve includes a valve piston having an expandable seal located at the primary wear location within the valve body to reduce hydraulic leakage. The valve piston also includes an internal fluid gallery formed therein in fluid communication with an annular groove wherein the expandable seal resides. Whenever the present TCC apply valve is actuated, TCC signal pressure enters the fluid gallery in the valve piston under pressure and urges the expandable seal in a radially outward direction into contact with the mating bore to minimize hydraulic fluid leakage during the apply cycle of the torque converter clutch. The valve piston also includes a control land having a substantially increased axial length with annular lubrication grooves, which improves stability and accuracy in operation.
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Rey Clifford F.
Rodriguez Saul
Sonnax Industries, Inc.
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