| 摘要 |
A friction disc ( 16 ) for a torque and/or rotational control apparatus includes elongated and shortened fins ( 42, 43 ) upstanding between and equally circumferentially spaced intermediate first and second component discs ( 40, 41 ). The fins ( 42, 43 ) are free of circumferential interconnections to allow air to radially pass freely between the fins ( 42, 43 ). The fins ( 42, 43 ) extend in non-radial directions between the first and second component discs ( 40, 41 ). A mounting ring ( 48 ) is integrally formed with the elongated fins ( 42 ) intermediate and axially spaced from each component disc ( 40, 41 ) and radially inward of the inner edges ( 46 ) of the component discs ( 40, 41 ). The elongated fins ( 42 ) each includes a first elongated portion ( 42 a) and a second shortened portion ( 42 b) extending at an obtuse angle therefrom and on the mounting ring ( 48 ) radially inside of the inner edges ( 46 ). Windows ( 74 ) are formed in the mounting ring ( 48 ) radially inside of the component discs ( 40, 41 ) and of the elongated fins ( 42 ).
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