Water well seal

Claim 1

IN COMBINATION WITH A WELL CASING STRING HAVING A TUBULAR PIPE COLUMN SECTION DISPOSED THEREIN AND ADAPTED AT ITS LOWER END OF COMMUNICATION WITH THE DISCAHRGE OF A WELL PUMP BODY, A WELL SEAL FOR ESTABLISHING A BARRIER TO THE PASSAGE OF AIR DOWN THE WELL CASING BETWEEN THE CASING AND THE PIPE COLUMN SECTION AND YET ENABLING THE PASSAGE OF AIR UPWARDLY BETWEEN SAID CASING AND PIPE COLUMN SECTION, SAID WELL SEAL COMPRISING AN ANNULAR RADIALLY OUTWARDLY PROJECTING SUPPORT FLANGE CARRIED BY SAID PIPE COLUMN SECTION, AN ANNULAR SEALING RING OF RESILIENT WATERPROOF MATERIAL INCLUDING A LOWER BASE PORTION SEATED ON THE UPPER FACE OF SAID SUPPORT FLANGE AND AN UPWARDLY AND OUTWARDLY INCLINED SEALING LIP CARRIED BY SAID BASE AND HAVING ITS UPPER END PORTION DISPOSED IN TIGHT SEALING ENGAGEMENT WITH THE INNER SURFACES OF SAID CASING, MEANS SECURING SAID RING TO SAID SUPPORT FLANGE AND EFFECTING AN AXIAL THRUST ON SAID SEAT URGING THE LATTE TOWARD SAID FLANGE, SAID SUPPORT FLANGE BEING REMOVABLY SECURED TO SAID PIPE COLUMN SECTION, SAID PIPE COLUMN SECTION INCLUDING MEANS DEFINING AN OUTWARDLY FACING CYLINDRICAL SEALING SURFACE DISPOSED GENERALLY RADIALLY INWARDLY OF SAID