Maximum output speed fluid shear coupling

Claim 1

IN A COUPLING: A ROTARY DRIVING MEMBER, A ROTARY DRIVEN MEMBER COAXIAL WITH THE DRIVING MEMBER, A TORQUETRANSMITTING LIQUID BETWEEN THE MEMBERS; THE DRIVEN MEMBER HAVING RELIEF SPACE AROUND AND WITHIN IT TO RECEIVE LIQUID FORCED CENTRIFUGALLY, A FLEXIBLE SEALING ELEMENT EXTENDING AROUND THE DRIVEN MEMBER ACROSS THE RELIEF SPACE TO FORM AN OUTER WALL THEREOF AND SEALED ON ITS SIDES TO THE DRIVEN MEMBER, THE RELIEF SPACE BEING EXPANDIBLE TO A SIZE TO RECEIVE ALL OF THE LIQUID; THE FLEXIBLE ELEMENT BEING YIELDABLE OUTWARDLY IN THE RELIEF SPACE BETWEEN ITS SEALED SIDES TO EXPAND THE RELIEF SPACE TO RECEIVE LIQUID FROM BETWEEN THE MEMBERS, WHEREBY TO REDUCE THE TORQUE TRANSMISSION FROM THE DRIVING TO THE DRIVEN MEMBER, AND WEIGHT MEANS ON THE DRIVEN MEMBER AND LOCATED AGAINST THE OUTE SIDE OF THE FLEXIBLE ELEMENT, THE WEIGHT MEANS BEING OUTWARDLY YIELDABLE IN RESPONSE TO A CENTRIFT UGAL FORCE, AND RESILIENT MEANS ACTING INWARDLY AGAINST THE WEIGHT MEANS AND FLEXIBLE ELMENT TO URGE THE FLEXIBLE ELEMENT INWARD TO REDUCE THE SIZE OF THE RELIEF SPACE AND TO CONFINE THE LIQUID TO THE SPACE BETWEEN THE DRIVING AND DRIVEN MEMBERS WHEN THE SPEED OF THE DRIVEN MEMBER IS BELOW PREDETERMINED SPEED.