Friction clutch, especially for motor vehicles

Claim 1

A FRICTION CLUTCH FOR MOTOR VEHICLES, WHICH INCLUDES: AN OUTPUT SHAFT, A FLYWHEEL ADAPTED TO BE CONNECTED TO A DRIVING SHAFT OF AN ENGINE AND PROVIDED WITH A PERIPHERAL ANNULAR FLANGE, ANNULAR COVER PLATE MEANS CONNECTED TO THE FREE END FACE OF SAID FLANGE, FOLLOWER DISC MEANS ARRANGED WITHIN SAID FLANGE AND CONNECTED TO SAID OUTPUT SHAFT FOR ROTATION THEREWITH, PRESSURE DISC MEANS AXIALLY DISPLACEABLY ARRANGED WITHIN SAID FLANGE AND OPERABLE SELECTIVELY TO BE MOVED INTO AND OUT OF FRICTIONAL DRIVING CONNECTION WITH SAID FOLLOWER DISC MEANS, ANNULAR DISH SPRING MEANS SUPPORTED BY SAID PRESSURE DISC MEANS AND HAVING ITS INNER MARGINAL PORTION PROVIDED WITH CIRCUMFERENTIALLY SPACED RECESSES SO AS TO FORM SUBSTANTIALLY RADIALLY INWARDLY EXTENDING AND CIRCUMFERENTIALLY SPACED TONGUES, THE INNER END PORTIONS ONLY OF SAID TONGUES BEING ENGAGED BY THE INNER END PORTION OF SAID COVER PLATE MEANS SO THAT BETWEEN THE INNER EDGE PORTION OF SAID COVER PLATE MEANS AND THE INNER EDGE PORTION OF SAID RECESSES THERE WILL BE FORMED AIR PASSAGE MEANS FOR COOLING SAID DISH-SPRING MEANS, THE RADIAL EXTENSION OF SAID RECESSES AMOUNTING TO FROM 20% TO 40% OF THE TOTAL RADIAL EXTENSION OF SAID DISH SPRING MEANS, A PLURALITY OF TWO-ARM LEVER MEANS PIVOTALLY SUPPORTED BY SAID COVER PLATE MEANS, EACH OF SAID TWO-ARM LEVER MEANS HAVING A FIRST ARM AND A SECOND ARM RESPECTIVELY EXTENDING RADIALLY OUTWARDLY AND RADIALLY INWARDLY FROM THE PIVOTAL CONNECTION OF THE LEVER ARM MEANS WITH SAID COVER PLATE MEANS, ARM LEVER MEANS WITH SAID PRESSURE DISC MEANS, AND A PRESSURE MEMBER MOVABLE RELATIVE TO AND IN AXIAL DIRECTION OF SAID OUTPUT SHAFT AND OPERATIVELY CONNECTED TO THE SECOND ARMS OF SAID TWO-ARM LEVER MEANS AND OPERABLE SELECTIVELY TO ACTUATE SAID PRESSURE DISC MEANS THROUGH SAID TWO-ARM LEVER MEANS FOR DISENGAGING THE CLUTCH.