Interchangeable disc for surgical drainage device

Claim 1

A SURGICAL DRAINAGE ASSEMBLY, COMPRISING A BAG HAVING FLEXIBLE, OPPOSED WALLS, ONE OF SAID WALLS HAVING AN OPENING THEREIN, AN ANNULAR SUPPORT MEMBER HAVING AN ANNULAR BACK AND FORWARDLY EXTENDING CYLINDRICAL FLANGE DEFINING A DISHED RECESS, AN ANNULAR FLANGE INTEGRAL WITH SAID BACK AND DEFINING AN ENDLESS GROOVE THEREWITH, SAID OPENING IN THE ONE WALL HAVING A RIM REMOVABLY SEATED IN SAID ENDLESS GROOVE, AN ANNULAR RESILIENT DISK REMOVABLY SEATED IN SAID RECESS, THE THICKNESS OF SAID DISK BEING GREATER THAN THE DEPTH OF SAID RECESS, SAID DISK HAVING A FREE ANNULAR END SURFACE EXTENDING BEYOND SAID MEMBER TO CONFORM WITH THE CONTOUR OF A WEARER''S BODY SURFACE, SAID DISK HAVING A CENTRAL HOLE ALIGNED AXIALLY WITH THE OPENINGS IN SAID MEMBER AND SAID ONE WALL, AND A FLAT SPRINGY, ANNULAR RING EMBEDDED IN SAID ANNULAR BACK, SAID RING HAVING DIAMETRALLY OPPOSED EXTENSIONS EXTENDING OUTSIDE OF SAID ANNULAR BACK, SAID EXTENSIONS BEING FORMED WITH HOOKS FOR ENGAGING ENDS OF A STRAP TO SUPPORT THE BAG ON THE WEARER''S BODY.