| 摘要 |
PROBLEM TO BE SOLVED: To provide a wet friction plate of a wet multiple disc clutch, etc., capable of reducing corotation of the clutch at the time of non-fastening by improving a discharging property of lubricating oil existing between the friction plate and a separator plate. SOLUTION: The wet friction plate of the wet multiple disk clutch, etc., to transmit torque by pressure contact of the friction plate 4 and the separator plate 5 by mounting friction materials 4a to transmit torque to the separator plate 5 on a contact surface of the friction plate 4 is devised to form an oil passage 4b to discharge lubricating oil between the adjacent friction materials 4a, 4a by arranging a plural number of the friction materials 4a, etc., with intervals in the circumferential direction and to sequentially increase passage width of the oil passages 4b, etc., toward the outside from the inside in the radial direction.
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