Sealing arrangement for preventing escape of gas along a vertical rotating shaft

Claim 1

AN IMPROVED SEALING ARRANGEMENT FOR A FLUID-TIGHT ENCLOSURE FOR PREVENTING THE ESCAPE OF A PRESSURIZED GAS FROM A FLUID-TIGHT ENCLOSURE IN A GIVEN DIRECTION ALONG A VERTICAL ROTATING SHAFT PAST A STATIONARY HOUSING STRUCTURE, SAID ARRANGEMENT COMPRISING IN COMBINATION, A HOUSING STRUCTURE CONSTRUCTED AND ARRANGED TO FORM A FLUID-TIGHT ENCLOSURE AND ADAPTED TO CONTAIN A FLUID UNDER PRESSURE, A SUBSTANTIALLY VERTICAL SHAFT MEMBER EXTENDING THROUGH SAID HOUSING STRUCTURE AND MOUNTED FOR RELATIVE ROTATION, IN A GIVEN DIRECTION AND SPEED RANGE, WITH RESPECT THERETO, AN ANNULAR CUP UNIT CONCENTRICALLY DISPOSED AROUND SAID SHAFT MEMBER AND ARRANGED TO CONTAIN AN ANNULAR BODY OF A LIQUID IN A GIVEN GENERAL POSITION, AN ANNULAR BODY OF VISCOUS LIQUID POSITIONED IN SAID CUP UNIT, AN ANNULAR SLEEVE UNIT CONCENTRICALLY DISPOSED AROUND SAID SHAFT MEMBER AND EXTENDING INTO SAID CUP UNIT AND A GIVEN DISTANCE INTO THE BODY OF SAID LIQUID, ONE OF SAID UNITS SUPPORTED IN FLUID-TIGHT RELATIONSHIP ON SAID HOUSING STRUCTURE AND THE OTHER OF SAID UNITS SUPPORTED IN FLUID-TIGHT RELATIONSHIP ON SAID SHAFT MEMBER FOR ROTATION THEREWITH, ONE OF SAID UNITS PROVIDED WITH A HELICAL LIQUID IMPELLING MEANS