Clutch piston having friction lining for lock-up clutch ...
United States Patent 6401898 . Abstract: In a clutch piston for a lock-up clutch, which has an annular friction lining bonded thereto and provided with an entire flat friction surface, the friction lining is formed of a plurality of fan-shaped lining segments which are made at a good yield by punching from a lining blank sheet and which are ...
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