Hermetically sealed shaft coupling

Claim 1

A HERMETICALLY SEALED SHAFT COUPLING COMPRISING A HOUSING SUPPORTING THE ENDS OF A PAIR OF DRIVING AND DRIVEN SHAFTS LYING ON A COMMON AXIS, AN ACUTELY INCLINED CRANK FROM ONE SHAFT WHICH MOVES AROUND A CONICAL PATH AND HAS DRIVING CONNECTION WITH THE OTHER SHAFT THROUGH A BEARING PIN CO-AXIAL WITH SAID CRANK, AN ENLARGEMENT ON THE OTHER SHAFT HAVING MEANS DISPLACED FROM THE SAID COMMON AXIS TO RECEIVE SAID BEARING PIN TO CONSTITUTE SAID DRIVING CONNECTION, SAID BEARING PIN HAVING A CYLINDRICAL HEAD TO WHICH ONE END OF A FLEXIBLE CYLINDRICAL SEALING ENVELOPE SURROUNDING THE CRANK IS FIXEDLY ATTACHED, THE OTHER END OF SAID ENVELOPE BEING FIXEDLY SECURED TO SAID HOUSING, SAID CYLINDRICAL HEAD OF THE BEARING PIN HAVING FIXEDLY ATTACHED THERETO ONE END OF A RIGID SUPPORTING SLEEVE WITHIN SAID ENVELOPE AND SURROUNDING THE SAID INCLINED CRANK, THE SLEEVE HAVING A NUTATIONAL CONNECTION WITH THE HOUSING AT ITS OTHER END, SAID NUTATIONAL CONNECTION ALLOWING THE SLEEVE TO FOLLOW THE SAID CONICAL PATH OF THE CRANK, THE NUTATIONAL CONNECTION BEING DESIGNED TO RESTRAIN THE SUPPORTING SLEEVE FROM TURNING ON ITS OWN AXIS.