Fluid pressure engaged clutch with belleville spring

Claim 1

A FRICTION DEVICE, COMPRISING: A ROTATIVE INPUT MEMBER HAVING A RADIAL SECTION WHICH CARRIES A CYLINDRICAL FLANGE SECTION AT THE OUTER PERIPHERY OF THE RADIAL SECTION, ROTATIVE OUTPUT MEANS, AND AN ACTUATING ASSEMBLY COMPRISING AN END PLATE NESTED WITHIN SAID INPUT MEMBER AND HAVING AN ANNULAR PERIPHERY IN ENGAGEMENT WITH THE INTERIOR OF SAID CYLINDRICAL FLANGE SECTION AND ADAPTED TO BE DRIVEN THEREWITH, AND AN ANNULAR PRESSURE PLATE DISPOSED BETWEEN SAID RADIAL SECTION AND SAID END PLATE HAVING AN OUTER PERIPHERY DRIVINGLY KEYED TO SAID CYLINDRICAL FLANGE SECTION, A RESILIENT BELLEVILLE DIAPHRAGM INTERPOSED BETWEEN SAID END PLATE AND SAID PRESSURE PLATE HAVING AN OUTER PERIPHERY FULCRUMED ON SAID CYLINDRICAL FLANGE SECTION AND AN INNER PERIPHERY ADAPTED TO BE ACTUATED, SAID DIAPHRAGM HAVING AN INTERMEDIATE PORTION IN ENGAGEMENT WITH SAID PRESSURE PLATE EFFECTIVE TO URGE SAID PRESSURE PLATE TOWARD SAID RADIAL SECTION FOR PROMOTING CLUTCH ENGAGEMENT WITH SAID OUTPUT MEANS WHEN SAID INNER PERIPHERY IS ACTUATED, EACH OF SAID END PLATE AND BELLEVILLE DIAPHRAGM HAVING A CENTRALLY ALIGNED OPENING, A HYDRAULIC MEANS RECEIVED WITHIN SAID CENTRAL OPENINGS OF SAID END PLATE AND DIAPHRAGM AND SELECTIVELY EFFECTIVE TO ACTUATE SAID INNER PERIPHERY OF SAID DIAPHRAGM, SAID HYDRAULIC MEANS COMPRISING AN ANNULAR FIXED PISTON CARRYING AN ANNULAR SHOULDER ON THE OUTER PERIPHERY THEREOF AND EFFECTIVE TO RECEIVE THE INNER PORTION OF SAID END PLATE TO PROVIDE A DRIVING CONNECTION THEREBETWEEN, A CYLINDER HAVING A CYLINDRICAL SECTION SLIDABLE ON SAID FIXED PISTON AND EFFECTIVE TO RECEIVE THE INNER PERIPHERY OF SAID BELLEVILLE DIAPHRAGM FOR MOVEMENT THEREWITH, AND FLUID SUPPLY MEANS HAVING A PASSAGE EXTENDING CENTRALLY THROUGH SAID PISTON FOR ACTUATING SAID SLIDABLE CYLINDER.