Hydrodynamic torque transmitting device

Details Hydrodynamic torque transmitting device Hydrodynamic torque transmitting device

2006-12-12

2006-12-12

Bonck, Rodney H. (Department: 3681)

192 clutches and power-stop control

Vortex-flow drive and clutch

Including drive-lockup clutch

C192S212000

Reexamination Certificate

active

07147090

ABSTRACT:
A hydrodynamic torque transmitting device is disclosed that overcomes problems created by the presence of a thrust washer therein. In a torque converter1according to the present invention, a piston41is disposed between a front cover2and a turbine4to form a front chamber F on a front cover side and a rear chamber R on a turbine side, and can move toward and away from the front cover2by means of a hydraulic pressure differential created between the front and rear chambers F and R. The piston41has a disk shaped body41a, and a frictional coupling portion (friction facing61) disposed on a outer peripheral portion of the body41athat serves to frictionally engage with the front cover2. The turbine hub23and the front cover2have opposing portions (63, 23b) that oppose each other across an axial space. The piston41has a support portion48that axially supports the turbine4when the piston41moves to a position near the front cover. When the piston41moves to a position closest to the front cover2, an axial space is maintained between the opposing portions (63, 23b).

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