Clutch-brake unit

Claim 1

IN A CLUTCH AND BRAKE MECHANISM INCLUDING A SHAFT, A DRIVE MEANS FOR ROTATING SAID SHAFT, CLUTCH MEANS FOR CONNECTING SAID SHAFT AND SAID DRIVE MEANS, AND BRAKE MEANS FOR STOPPING SAID SHAFT: A HUB SECURED TO SAID SHAFT FOR ROTATION THEREWITH, A STATIONARY PLATE FIXED TO SAID HUB AND DISPOSED BETWEEN SAID CLUTCH AND BRAKE MEANS FOR SELECTIVE FRICTIONAL ENGAGEMENT THEREBY, FLUID PRESSURE MEANS FOR ACTUATING SAID CLUTCH MEANS MOUNTED ON SAID HUB FOR ROTATION THEREWITH AND INCLUDING A CYLINDER MEMBER HAVING AN ANNULAR AXIALLY FACING GROOVE IN ALIGNMENT WITH SAID CLUTCH AND BRAKE MEANS AND AN ANNULAR PISTON RECEIVED THEREIN, MEANS FOR AXIALLY ADJUSTING THE POSITION OF SAID CYLINDER MEMBER ON SAID HUB, A FIRST FLUID PRESSURE CONDUCTING PASSAGE IN SAID SHAFT, A SECOND FLUID PRESSURE CONDUCTING PASSAGE IN SAID CYLINDER MEMBER IN CONNECTION WITH SAID GROOVE, A RADIAL OPENING IN SAID HUB, A FIRST TUBULAR MEMBER IN CONNECTION WITH SAID FIRST FLUID PRESSURE CONDUCTING PASSAGE EXTENDING THROUGH SAID RADIAL OPENING, A SECOND TUBULAR MEMBER IN CONNECTION WITH SAID SAID SECOND FLUID PRESSURE CONDUCTING PASSAGE SURROUNDING SAID FIRST TUBULAR MEMBER AND EXTENDING BETWEEN SAID HUB AND SAID CYLINDER MEMBER, SAID FIRST AND SECOND TUBULAR MEMBERS PROVIDING COMMUNICATION BETWEEN SAID FIRST FLUID PASSAGE IN SAID SHAFT AND SAID SECOND FLUID PASSAGE IN SAID CYLINDER MEMBER, A FIRST O-RING BETWEEN THE ONE END OF SAID SECOND TUBULAR MEMBER ADJACENT SAID CYLINDER MEMBER AND SAID CYLINDER MEMBER, AND A SECOND O-RING BETWEEN SAID FIRST TUBULAR MEMBER AND SAID SECOND TUBULAR MEMBER, WHEREBY SAID CYLINDER MEMBER CAN BE POSITIONED WITH RESPECT TO SAID HUB WHILE MAINTAINING A SEALING ENGAGEMENT THEREBETWEEN.