Demountable closure

Claim 1

IN A CLOSURE, A PAIR OF INNER AND OUTER ANNULAR BEARING MEMBERS HAVING A COMMON CENTER, SAID MEMBERS BEING RELATIVELY ROTATABLE AND UNIVERSALLY TILTABLE ABOUT SAID COMMON CENTER, SAID MEMBERS HAVING AN ANNULAR LUBRICANT CHAMBER THEREBETWEEN, A HOUSING RECEIVING THE OUTER BEARING MEMBER AND HAVING AN ANNULAR END FLANGE ABUTTING AN END OF SAID OUTER MEMBER, A SLEEVE PORTION ON THE INNER MEMBER EXTENDING THROUGH AND RADIALLY SPACED FROM THE FLANGE, A SLINGER MOUNTED ON THE SLEEVE PORTION, SAID OUTER BEARING MEMBER HAVING A PARTI-SPHERICAL INTERNAL RACEWAY CONCENTRIC WITH SAID COMMON CENTER, A TAPERING WALL ON SAID SLINGER AND HAVING A PARTI-SPHERICAL OUTER FACE CONCENTRIC WITH SAID COMMON CENTER AND HAVING THE SAME RADIUS AS SAID RACEWAY, SAID SLINGER WALL HAVING AN INNER END WITHIN THE LUBRICANT CHAMBER, RADIALLY INWARDLY EXTENDING PROJECTIONS ON THE FLANGE, SAID FLANGE HAVING AN ANNULAR RECESS ADJACENT THE END OF THE OUTER BEARING MEMBER, A RESILIENTLY DEFORMABLE SEALING WASHER PERIPHERALLY SEATED IN THE FLANGE AGAINST THE OUTER BEARING MEMBER AND DEFORMABLY INTERFITTING WITHIN SAID RECESS AGAINST THE OUTER BEARING MEMBER AND AGAINST SAID INWARD PROJECTIONS, AND AN ANNULAR RESILIENT SEALING WASHER LIP IN YIELDABLE WIPING ENGAGEMENT WITH SAID PARTI-SPHERICAL OUTER FACE IN SPACED RELATION TO THE INNER END OF SAID SLINGER WALL.