Patent ID: 6557685
Filing Date: 2003-05-06
Classification: F16D,F16H

Abstract:
A multiplate lockup clutch for use in fluid, said multiplate lockup clutch being provided with a muliplicity of friction plates, wherein each of said friction plates is provided on a friction surface thereof with a plurality of combined grooves; and each of said combined grooves comprises a first groove, which extends from an inner circumferential edge to an outer circumferential edge of said friction plate and communicates an inner circumference and an outer circumference of said friction plate with each other, and a second groove which intersects said first groove, extends in a circumferential direction of said friction plate, and is closed at opposite ends thereof such that said second groove does not extend to an adjacent combined groove when each of said friction plates is provided with only two combined grooves or to any one of adjacent combined grooves when each of said friction plates is provided with at least three combined grooves.