Fluid clutch-brake

Claim 1

A CLUTCH-BRAKE COMPRISING A PAIR OF AXIALLY ALIGNED SHAFTS CLOSELY ARRANGED END TO END, A CIRCULAR PLATE AXIALLY MOVABLY, BUT NON-ROTATABLY MOUNTED UPON THE END OF ONE OF THE SHAFTS AND A DISK RIGIDLY MOUNTED UPON THE END OF THE OTHER SHAFT PARALLEL TO THE PLATE, WITH THE PLATE AND DISK BEING COAXIAL WITH THE SHAFTS; A FIXED HOUSING HAVING AN INTEGRAL, CIRCULAR-IN-CROSS-SECTION, SEALED CHAMBER, COAXIAL WITH AND RECEIVING THE ENDS OF THE SHAFTS AND DISK AND PLATE, WITH THE SHAFTS BEING ROTATABLY SUPPORTED IN SAID HOUSING AND WITH THE CIRCULAR WALL OF THE CHAMBER BEING CLOSELY ADJACENT TO THE PERIPHERAL EDGE OF SAID PLATE; SAID CHAMBER HAVING ONE END ARRANGED PARALLEL TO AND CLOSELY ADJACENT TO THE PLATE AND FORMING A FIXED CONTACT SURFACE, THE PLATE BEING BETWEEN AND NORMALLY BEING SPACED A SHORT DISTANCE FROM THE DISK AND SAID FIXED CONTACT SURFACE; A PAIR OF PASSAGEWAYS, FOR CARRYING HIGH PRESSURE FLUID, FORMED IN SAID HOUSING AND EACH OPENING INTO THE CHAMBER AT AN OPPOSITE FACE OF THE PLATE FOR SELECTIVELY CARYING HIGH PRESSURE FLUID INTO THE CHAMBER AT ONE OR THE OTHER FACES OF THE PLATE; WHEREIN THE PLATE IS AXIALLY MOVABLE BY THE FLUID INTO FACE TO FACE CONTACT WITH EITHER THE FIXED CONTACT SURFACE FOR BRAKING ROTATION OF THE SHAFT UPON WHICH IT IS MOUNTED OR WITH THE DISK FOR CLUTCHING THE SHAFTS TOGETHER.